From d1e821c625ee7918b1f88cd477e8a484c07336e1 Mon Sep 17 00:00:00 2001
From: Chuck <33324927+ChuckBuilds@users.noreply.github.com>
Date: Mon, 14 Sep 2026 09:42:24 -0400
Subject: [PATCH] fix(web): harden, polish and optimize the web UI per the Sept
 2026 audit (#568)

* fix(web): harden, polish and optimize the web UI per the September 2026 audit

Works through docs/archive/WEB_UI_AUDIT_2026-09.md (health 8/20).

Implementation integrity (P0)
- app.css now defines every utility class the templates and JS use,
  including .hidden, so the ~145 JS show/hide toggles work. Button reset,
  and base component rules (.btn, .form-control) wrapped in :where() so
  utility classes on the same element win. New static-audit test fails
  when a used utility class has no rule.

Accessibility
- Focus rings render (the old ring rule referenced undefined variables);
  one :focus-visible outline everywhere; skip link; labelled nav landmarks.
- Shared dialog helper (js/utils/dialog.js): role/aria-modal, focus trap,
  Escape, focus return, applied to every modal.
- Named icon-only buttons and labelled ~70 form fields.
- Toasts announced once; errors persist >= 10s; one showNotification.
- Captive WiFi page: live region, timeouts, dark mode, 16px inputs.

Performance (Pi Zero 2 W)
- SSE streams and tab timers pause when hidden or off-tab; the display
  stream only runs while a preview is visible. app-shell.js deferred.
- Widget scripts served as one versioned bundle (/assets/widgets.js):
  52 -> 21 script tags, 66 -> 35 requests on first load.
- Stdlib gzip fallback when flask-compress is missing: first-load JS/CSS
  1358 KB -> 291 KB on the wire. SSE untouched.

Theming and responsive
- File managers, form fields and Fonts upload on theme tokens; bare
  inputs themed in dark mode; no more white surfaces.
- No horizontal overflow at 375px on any tab; 44px touch targets on
  coarse pointers; reduced-motion respected; header title truncates.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): clear Codacy findings on #568

- json-file-manager: focus-trap releases kept in a Map (no dynamic
  property access or delete; no value-returning forEach callback)
- notification / schedule-picker: style and day-label lookups via Map
- app.js: move the pending-queue assignment out of the expression
- diff_viewer / error_handler: named function declarations instead of
  arrow consts

No behavior change.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* test: check the OAuth widget ships in the widget bundle

base.html no longer tags widget scripts one by one; they load through
/assets/widgets.js. Assert the page requests the bundle and the bundle
contains google-oauth.js, which is what the test was protecting.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): address review feedback on #568

- widget bundle version fingerprints every file (name, mtime_ns, size)
- gzip fallback appends Accept-Encoding to an existing Vary header
- dialog helper: releasing a non-top dialog no longer moves focus out of
  the dialog the user is in
- labels: file-upload targets its file input; fallback config fields get
  label for/id pairs; native color input has a fallback name
- utility audit also reads class names inside bound :class expressions

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): give the native color-picker input an accessible name

CodeRabbit flagged this on PR #568 as an outside-diff finding (never
posted inline, so it was missed in the round of fixes that addressed
the other 6 review comments). The <input type="color"> only carried a
title attribute; screen readers don't reliably announce title, and
there's no other label naming the control when showHexInput is false.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): clear Codacy findings in app-shell.js

- drop the unused catch binding on the SSE JSON parse
- move the pending-notification queue assignment out of the expression

No behavior change.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* fix(web): contain plugin widgets/ dir and bound style-editor retries

From CodeRabbit review on #568 (code that arrived with the main merge):
- serve_plugin_widget resolves widgets/ with resolve_under before
  resolving the manifest script under it, so a symlinked widgets
  directory can't become the containment base (CWE-22). New test.
- style-editor init stops polling after ~10s when the widget never
  registers and leaves the plain fallback fields in place.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
---
 test/test_color_picker_widget.py              |  25 +
 test/test_web_smoke.py                        |  12 +
 test/test_web_static_audit.py                 |  85 +-
 test/test_widget_scripts.py                   | 113 ++-
 .../test_calendar_oauth_endpoints.py          |   8 +-
 test/web_interface/test_gzip_fallback.py      |  68 ++
 .../web_interface/test_plugin_widget_route.py |  21 +
 web_interface/app.py                          |  79 +-
 web_interface/blueprints/pages_v3.py          |  33 +-
 web_interface/static/v3/app.css               | 724 ++++++++++++++++--
 web_interface/static/v3/app.js                |  62 +-
 web_interface/static/v3/js/app-shell.js       | 228 +++++-
 .../static/v3/js/config/diff_viewer.js        |  66 +-
 web_interface/static/v3/js/settings-search.js |   4 +-
 web_interface/static/v3/js/utils/dialog.js    | 139 ++++
 .../static/v3/js/utils/error_handler.js       | 195 +++--
 .../static/v3/js/widgets/array-table.js       |  32 +-
 .../static/v3/js/widgets/color-picker.js      |   6 +-
 .../static/v3/js/widgets/date-picker.js       |   6 +-
 .../v3/js/widgets/file-upload-single.js       |   4 +-
 .../static/v3/js/widgets/file-upload.js       |  12 +-
 .../static/v3/js/widgets/json-file-manager.js | 164 ++--
 .../static/v3/js/widgets/notification.js      | 239 +++++-
 .../static/v3/js/widgets/number-input.js      |  10 +-
 .../static/v3/js/widgets/password-input.js    |   8 +-
 .../v3/js/widgets/plugin-file-manager.js      | 205 +++--
 .../static/v3/js/widgets/schedule-picker.js   |   7 +-
 .../static/v3/js/widgets/text-input.js        |   4 +-
 .../static/v3/js/widgets/time-picker.js       |   6 +-
 web_interface/static/v3/plugins_manager.js    | 186 ++++-
 web_interface/templates/v3/base.html          | 183 ++---
 web_interface/templates/v3/captive_setup.html | 230 ++++--
 .../templates/v3/partials/backup_restore.html |   2 +-
 .../templates/v3/partials/display.html        |  19 +-
 .../templates/v3/partials/fonts.html          |  72 +-
 web_interface/templates/v3/partials/logs.html |  68 +-
 .../v3/partials/operation_history.html        |  10 +-
 .../templates/v3/partials/overview.html       |   2 +-
 .../templates/v3/partials/plugin_config.html  | 120 ++-
 .../templates/v3/partials/plugins.html        |  49 +-
 .../templates/v3/partials/raw_json.html       |   8 +-
 .../v3/partials/starlark_config.html          |  47 +-
 .../templates/v3/partials/tools.html          |  68 +-
 web_interface/templates/v3/partials/wifi.html |   3 +
 web_interface/widget_bundle.py                | 107 +++
 45 files changed, 2869 insertions(+), 870 deletions(-)
 create mode 100644 test/test_color_picker_widget.py
 create mode 100644 test/web_interface/test_gzip_fallback.py
 create mode 100644 web_interface/static/v3/js/utils/dialog.js
 create mode 100644 web_interface/widget_bundle.py

diff --git a/test/test_color_picker_widget.py b/test/test_color_picker_widget.py
new file mode 100644
index 00000000..bd6a9577
--- /dev/null
+++ b/test/test_color_picker_widget.py
@@ -0,0 +1,25 @@
+"""Regression: the native color input in the color-picker widget must have
+an accessible name independent of showHexInput.
+
+CodeRabbit flagged (PR #568) that the <input type="color"> only carried a
+`title` attribute -- screen readers don't reliably announce `title`, and
+when showHexInput is false there is no other label naming the control.
+"""
+from pathlib import Path
+
+WIDGET_JS = (
+    Path(__file__).resolve().parent.parent
+    / "web_interface" / "static" / "v3" / "js" / "widgets" / "color-picker.js"
+)
+
+
+def test_native_color_input_has_aria_label():
+    source = WIDGET_JS.read_text(encoding="utf-8")
+    start = source.index('<input type="color"')
+    end = source.index(">", start)
+    tag = source[start:end]
+    assert 'aria-label=' in tag, (
+        "native color <input> lost its accessible name; screen readers need "
+        "aria-label since it has no associated <label> and showHexInput can "
+        "be false"
+    )
diff --git a/test/test_web_smoke.py b/test/test_web_smoke.py
index d0fd30de..1d39a008 100644
--- a/test/test_web_smoke.py
+++ b/test/test_web_smoke.py
@@ -164,6 +164,18 @@ def test_static_asset_served(client, asset):
     assert len(resp.data) > 0
 
 
+def test_widget_bundle_is_served_and_requested(client):
+    """base.html loads every widget through one versioned bundle request."""
+    page = client.get("/").get_data(as_text=True)
+    assert "/assets/widgets.js?v=" in page
+    resp = client.get("/assets/widgets.js")
+    assert resp.status_code == 200
+    assert resp.mimetype == "application/javascript"
+    body = resp.get_data(as_text=True)
+    assert body.index("/* registry.js */") < body.index("/* notification.js */")
+    assert "/* json-file-manager.js */" in body
+
+
 def test_durations_page_groups_by_plugin(client):
     """One duration input per display mode of each enabled plugin, plus the
     leftover group for saved keys no enabled plugin owns."""
diff --git a/test/test_web_static_audit.py b/test/test_web_static_audit.py
index 4d9bae1f..b2bda109 100644
--- a/test/test_web_static_audit.py
+++ b/test/test_web_static_audit.py
@@ -37,11 +37,11 @@ def test_every_used_breakpoint_class_is_defined():
     class_attr = re.compile(r'class="([^"]*)"')
     bp_class = re.compile(r"\b(%s):[A-Za-z0-9_.-]+" % "|".join(BP_PREFIXES))
     for path in _template_files():
-        for attr in class_attr.findall(path.read_text()):
+        for attr in class_attr.findall(path.read_text(encoding="utf-8")):
             for m in bp_class.finditer(attr):
                 used.add(m.group(0))
 
-    css = APP_CSS.read_text()
+    css = APP_CSS.read_text(encoding="utf-8")
     defined = {
         m.group(0).lstrip(".").replace("\\:", ":")
         for m in re.finditer(
@@ -56,13 +56,90 @@ def test_every_used_breakpoint_class_is_defined():
     )
 
 
+_VARIANTS = (
+    r"(?:(?:sm|md|lg|xl|2xl|hover|focus|focus-visible|active|disabled|first|last"
+    r"|group-hover|peer-checked|peer-focus|placeholder|file):)*"
+)
+_UTILITY = re.compile(
+    "^" + _VARIANTS + r"-?(?:"
+    r"(?:block|inline|inline-block|inline-flex|flex|grid|hidden|table|contents"
+    r"|static|fixed|absolute|relative|sticky|truncate|sr-only|transform"
+    r"|uppercase|lowercase|capitalize|italic|underline|line-through|border|shadow"
+    r"|rounded|transition|grow|shrink|group|peer)"
+    r"|(?:m|p)[trblxy]?-[\w./]+"
+    r"|(?:w|h|min-w|min-h|max-w|max-h|gap|gap-x|gap-y|space-x|space-y|top|right"
+    r"|bottom|left|inset|inset-x|inset-y|z|opacity|duration|scale|rotate"
+    r"|translate-x|translate-y|grid-cols|col-span|leading|tracking)-[\w./\[\]]+"
+    r"|(?:text|bg|border|divide|ring|placeholder|accent)-(?:[a-z]+-\d{2,3}(?:/\d+)?"
+    r"|white|black|transparent|xs|sm|base|md|lg|xl|[2-5]xl|left|center|right"
+    r"|opacity-\d+|[trblxy](?:-\d)?|\d|dashed|dotted|offset-\d)"
+    r"|font-(?:mono|sans|serif|thin|light|normal|medium|semibold|bold|extrabold)"
+    r"|select-(?:none|all|text|auto)"
+    r"|(?:rounded|shadow|items|justify|self|flex|whitespace|break|object|list"
+    r"|overflow|overflow-x|overflow-y|cursor|pointer-events|appearance"
+    r"|ease|divide|line-clamp)-[a-z0-9]+(?:-[a-z0-9]+)?(?:\[[^\]]+\])?"
+    r")$"
+)
+
+
+def _css_light_classes(css):
+    """Classes that get a rule outside [data-theme="dark"]."""
+    css = re.sub(r"/\*.*?\*/", "", css, flags=re.S)
+    defined = set()
+    for block in re.finditer(r"([^{}]+)\{", css):
+        for sel in block.group(1).split(","):
+            sel = sel.strip()
+            if sel.startswith("@") or sel.startswith('[data-theme="dark"]'):
+                continue
+            for m in re.finditer(r"\.((?:\\.|[\w-])+)", sel):
+                defined.add(m.group(1).replace("\\", ""))
+    return defined
+
+
+def test_every_used_utility_class_is_defined():
+    """app.css is the whole stylesheet (no Tailwind build), so a utility class
+    it doesn't define silently does nothing. `.hidden` was missing for years,
+    which broke every JS show/hide toggle. Scans templates and static JS."""
+    attr = re.compile(r"""(?:class|className)\s*[=:]\s*(["'`])(.*?)\1""", re.S)
+    class_list = re.compile(r"classList\.(?:add|remove|toggle)\(([^)]*)\)")
+    template_expr = re.compile(r"\{\{.*?\}\}|\{%.*?%\}|\$\{[^}]*\}", re.S)
+    files = list(_template_files()) + [
+        p for p in (STATIC / "v3").rglob("*.js")
+        if "vendor" not in p.parts and not p.name.endswith(".min.js")
+    ]
+    used = {}
+    for path in files:
+        text = template_expr.sub(" ", path.read_text(encoding="utf-8"))
+        chunks = [m.group(2) for m in attr.finditer(text)]
+        chunks += re.findall(r"""['"]([^'"]*)['"]""", " ".join(
+            m.group(1) for m in class_list.finditer(text)))
+        # :class="{ 'hidden': open }" and ternaries hold class names inside
+        # string literals; read those as well as the raw chunk.
+        bound = re.compile(r""":class\s*=\s*"([^"]*)""")
+        for m in bound.finditer(text):
+            chunks.append(m.group(1))
+        for chunk in chunks:
+            candidates = [chunk] + re.findall(r"""['`]([^'`]*)['`]""", chunk)
+            for candidate in candidates:
+                for token in candidate.split():
+                    if _UTILITY.match(token):
+                        used.setdefault(token, path.relative_to(PROJECT_ROOT))
+
+    defined = _css_light_classes(APP_CSS.read_text(encoding="utf-8"))
+    missing = sorted(f"{cls} ({used[cls]})" for cls in used if cls not in defined)
+    assert not missing, (
+        "Utility classes used in templates/JS but not defined in app.css "
+        f"(they silently no-op): {missing}"
+    )
+
+
 def test_every_static_url_for_points_to_a_real_file():
     ref = re.compile(
         r"url_for\(\s*['\"]static['\"]\s*,\s*filename\s*=\s*['\"]([^'\"]+)['\"]"
     )
     missing = []
     for path in _template_files():
-        for filename in ref.findall(path.read_text()):
+        for filename in ref.findall(path.read_text(encoding="utf-8")):
             if not (STATIC / filename).is_file():
                 missing.append(f"{path.relative_to(PROJECT_ROOT)}: {filename}")
     assert not missing, f"Templates reference missing static assets: {missing}"
@@ -73,7 +150,7 @@ def test_js_files_calling_debuglog_declare_the_global():
     for path in sorted((STATIC / "v3").rglob("*.js")):
         if "vendor" in path.parts:
             continue
-        text = path.read_text()
+        text = path.read_text(encoding="utf-8")
         # Calls debugLog( but neither defines it nor declares the global
         calls = re.search(r"(?<![.\w])debugLog\(", text)
         defines = "window.debugLog" in text
diff --git a/test/test_widget_scripts.py b/test/test_widget_scripts.py
index 58e949b3..46d780d0 100644
--- a/test/test_widget_scripts.py
+++ b/test/test_widget_scripts.py
@@ -1,66 +1,99 @@
-"""Guard: every widget JS file must be loaded by base.html or explicitly allowlisted.
+"""Guard: every widget JS file must ship in the widget bundle or be allowlisted.
 
 Widget files register themselves with LEDMatrixWidgets at load time; a file
-that exists but is never <script>-included silently breaks any plugin whose
-config schema declares that widget (the field renders as an empty container
-that polls the registry forever). base.html's widget list is maintained by
-hand, so this test keeps it honest.
+that exists but is never loaded silently breaks any plugin whose config schema
+declares that widget (the field renders as an empty container that polls the
+registry forever).
+
+base.html loads them as one concatenated request (web_interface/widget_bundle.py),
+so BUNDLE_ORDER is the hand-maintained list this test keeps honest. It also
+checks that base.html actually requests the bundle, and that the bundle's
+concatenation order puts the registry and base class first.
 """
 import re
+import sys
 from pathlib import Path
 from typing import Set
 
 PROJECT_ROOT = Path(__file__).resolve().parent.parent
+sys.path.insert(0, str(PROJECT_ROOT))
+
+from web_interface import widget_bundle  # noqa: E402
+
 WIDGETS_DIR = PROJECT_ROOT / 'web_interface' / 'static' / 'v3' / 'js' / 'widgets'
 BASE_HTML = PROJECT_ROOT / 'web_interface' / 'templates' / 'v3' / 'base.html'
 
-# Matches url_for('static', filename='...') inside actual <script> tags.
-SCRIPT_SRC_RE = re.compile(
-    r"""<script\s[^>]*src="\{\{\s*url_for\(\s*'static'\s*,\s*filename='([^']+)'\s*\)\s*\}\}[^"]*"""
-)
-
-# Files that must NOT be script-included, with the reason.
-ALLOWLIST = {
-    # Documentation example (docs/widget-guide.md); registers the name
-    # 'color-picker' and would shadow the real color-picker.js if loaded.
-    'example-color-picker.js',
-}
+# Files that must NOT be loaded, with the reason.
+ALLOWLIST = set(widget_bundle.EXCLUDED)
 
 
-def _included_widget_scripts() -> Set[str]:
-    """Return widget JS basenames referenced by real <script> tags in base.html."""
-    base_html = BASE_HTML.read_text(encoding='utf-8')
-    return {
-        Path(filename).name
-        for filename in SCRIPT_SRC_RE.findall(base_html)
-        if filename.startswith('v3/js/widgets/')
-    }
+def _bundled_names() -> Set[str]:
+    return set(widget_bundle.BUNDLE_ORDER)
 
 
-def test_every_widget_script_is_included_in_base_html() -> None:
-    """Every non-allowlisted widget file must be loaded by a <script> tag."""
+def test_every_widget_script_is_bundled() -> None:
+    """Every non-allowlisted widget file must be in BUNDLE_ORDER."""
     assert WIDGETS_DIR.is_dir(), f'Widget directory missing: {WIDGETS_DIR}'
-    included = _included_widget_scripts()
-    assert included, 'No widget <script> tags found in base.html — regex or template drift?'
+    bundled = _bundled_names()
+    assert bundled, 'BUNDLE_ORDER is empty — widget_bundle drift?'
     missing = [
         js_file.name
         for js_file in sorted(WIDGETS_DIR.glob('*.js'))
-        if js_file.name not in ALLOWLIST and js_file.name not in included
+        if js_file.name not in ALLOWLIST and js_file.name not in bundled
     ]
     assert not missing, (
-        'Widget files exist but are never <script>-included in base.html '
-        '(plugins declaring these widgets get blank config fields): '
-        + ', '.join(missing)
-        + '. Add a script tag to base.html or add the file to ALLOWLIST '
-        'with a reason.'
+        'Widget files exist but are never loaded (plugins declaring these '
+        'widgets get blank config fields): ' + ', '.join(missing)
+        + '. Add the file to BUNDLE_ORDER in web_interface/widget_bundle.py, '
+        'or to EXCLUDED with a reason.'
     )
 
 
-def test_allowlisted_widgets_are_not_included() -> None:
-    """Allowlisted (must-not-load) widget files must stay out of base.html."""
-    included = _included_widget_scripts()
-    wrongly_included = [name for name in ALLOWLIST if name in included]
+def test_allowlisted_widgets_are_not_bundled() -> None:
+    """Allowlisted (must-not-load) widget files stay out of the bundle."""
+    wrongly_included = sorted(ALLOWLIST & _bundled_names())
     assert not wrongly_included, (
-        'Allowlisted (must-not-load) widget files are script-included in '
-        'base.html: ' + ', '.join(wrongly_included)
+        'Allowlisted (must-not-load) widget files are in the bundle: '
+        + ', '.join(wrongly_included)
     )
+
+
+def test_bundle_order_lists_only_existing_files() -> None:
+    """A renamed or deleted widget must not linger in BUNDLE_ORDER."""
+    stale = [name for name in widget_bundle.BUNDLE_ORDER
+             if not (WIDGETS_DIR / name).is_file()]
+    assert not stale, f'BUNDLE_ORDER names files that do not exist: {stale}'
+
+
+def test_registry_and_base_widget_load_first() -> None:
+    """Widgets call into the registry and base class as they load."""
+    order = widget_bundle.BUNDLE_ORDER
+    assert order[0] == 'registry.js', order[:3]
+    assert order[1] == 'base-widget.js', order[:3]
+
+
+def test_base_html_requests_the_bundle() -> None:
+    """base.html must load the bundle (and no longer tag widgets one by one)."""
+    base_html = BASE_HTML.read_text(encoding='utf-8')
+    assert 'widgets_bundle_url()' in base_html, (
+        'base.html does not request the widget bundle'
+    )
+    per_file = re.findall(
+        r"""<script\s[^>]*src="\{\{\s*url_for\(\s*'static'\s*,\s*"""
+        r"""filename='(v3/js/widgets/[^']+)'""",
+        base_html,
+    )
+    assert not per_file, (
+        'base.html still loads widget files individually alongside the '
+        f'bundle (they would run twice): {per_file}'
+    )
+
+
+def test_bundle_concatenates_every_file() -> None:
+    """The built bundle contains each file, separated so sources can't merge."""
+    body, version = widget_bundle.build_bundle()
+    assert version and version == widget_bundle.bundle_version()
+    for name in widget_bundle.BUNDLE_ORDER:
+        assert f'/* {name} */' in body, f'{name} missing from the built bundle'
+    for name in ALLOWLIST:
+        assert f'/* {name} */' not in body, f'{name} must not be bundled'
diff --git a/test/web_interface/test_calendar_oauth_endpoints.py b/test/web_interface/test_calendar_oauth_endpoints.py
index ef18b413..b6e86943 100644
--- a/test/web_interface/test_calendar_oauth_endpoints.py
+++ b/test/web_interface/test_calendar_oauth_endpoints.py
@@ -99,9 +99,15 @@ class TestTheRoutesExistAtAll:
         assert "'google-oauth'" in allow_list_line[0], allow_list_line[0]
 
     def test_the_widget_script_is_served(self):
+        # Widgets load through one bundle (web_interface/widget_bundle.py), so
+        # the page must request the bundle and the bundle must carry the file.
+        from web_interface import widget_bundle
         base = (Path(project_root) / 'web_interface/templates/v3/base.html'
                 ).read_text(encoding='utf-8')
-        assert 'widgets/google-oauth.js' in base
+        assert 'widgets_bundle_url()' in base
+        assert 'google-oauth.js' in widget_bundle.BUNDLE_ORDER
+        body, _version = widget_bundle.build_bundle()
+        assert '/* google-oauth.js */' in body
 
     def test_the_status_line_is_announced(self):
         # Every message the widget gives arrives after an async call, so a
diff --git a/test/web_interface/test_gzip_fallback.py b/test/web_interface/test_gzip_fallback.py
new file mode 100644
index 00000000..50f29cbe
--- /dev/null
+++ b/test/web_interface/test_gzip_fallback.py
@@ -0,0 +1,68 @@
+"""The stdlib gzip fallback must compress the UI's text assets.
+
+flask-compress is optional (app.py tolerates its absence). Without a fallback a
+Pi missing it ships ~1.2 MB of uncompressed JavaScript to a phone over WiFi on
+every first load and every update. These pin the fallback's contract: text
+assets compress and round-trip byte-for-byte, clients that don't ask for gzip
+get the original bytes, and small or non-text responses are left alone.
+"""
+
+import gzip
+from pathlib import Path
+
+import pytest
+
+STATIC = Path(__file__).resolve().parents[2] / "web_interface" / "static"
+
+
+@pytest.fixture
+def client(monkeypatch):
+    import web_interface.app as web_app
+    # Exercise the fallback even on machines that do have flask-compress.
+    monkeypatch.setattr(web_app, "_HAVE_FLASK_COMPRESS", False)
+    web_app.app.config["TESTING"] = True
+    with web_app.app.test_client() as c:
+        yield c
+
+
+@pytest.mark.parametrize("url,path", [
+    ("/static/v3/plugins_manager.js", "v3/plugins_manager.js"),
+    ("/static/v3/app.css", "v3/app.css"),
+])
+def test_static_text_asset_is_gzipped_and_round_trips(client, url, path):
+    resp = client.get(url, headers={"Accept-Encoding": "gzip, deflate"})
+    assert resp.status_code == 200
+    assert resp.headers.get("Content-Encoding") == "gzip"
+    assert "Accept-Encoding" in resp.headers.get("Vary", "")
+    original = (STATIC / path).read_bytes()
+    assert gzip.decompress(resp.data) == original
+    assert len(resp.data) < len(original) / 2
+    assert int(resp.headers["Content-Length"]) == len(resp.data)
+
+
+def test_repeat_request_serves_identical_compressed_bytes(client):
+    headers = {"Accept-Encoding": "gzip"}
+    first = client.get("/static/v3/js/app-shell.js", headers=headers).data
+    second = client.get("/static/v3/js/app-shell.js", headers=headers).data
+    assert first == second
+
+
+def test_client_without_gzip_gets_the_original_bytes(client):
+    resp = client.get("/static/v3/app.css", headers={"Accept-Encoding": "identity"})
+    assert resp.status_code == 200
+    assert "Content-Encoding" not in resp.headers
+    assert resp.data == (STATIC / "v3/app.css").read_bytes()
+
+
+def test_binary_assets_are_not_recompressed(client):
+    resp = client.get("/static/v3/icons/icon-192.png", headers={"Accept-Encoding": "gzip"})
+    assert resp.status_code == 200
+    assert "Content-Encoding" not in resp.headers
+
+
+def test_widget_bundle_is_gzipped_and_immutable(client):
+    resp = client.get("/assets/widgets.js", headers={"Accept-Encoding": "gzip"})
+    assert resp.status_code == 200
+    assert resp.headers.get("Content-Encoding") == "gzip"
+    assert "immutable" in resp.headers.get("Cache-Control", "")
+    assert b"/* registry.js */" in gzip.decompress(resp.data)
diff --git a/test/web_interface/test_plugin_widget_route.py b/test/web_interface/test_plugin_widget_route.py
index 330fb1cf..b4858108 100644
--- a/test/web_interface/test_plugin_widget_route.py
+++ b/test/web_interface/test_plugin_widget_route.py
@@ -165,6 +165,27 @@ class TestPathTraversal:
         assert "hunter2" not in r.get_data(as_text=True)
 
 
+    def test_a_symlinked_widgets_directory_cannot_escape(self, tmp_path, make_client):
+        """widgets/ itself is contained before the script is resolved under it,
+        so a symlink out of the plugin can't become the containment base."""
+        outside = tmp_path / "outside"
+        outside.mkdir()
+        (outside / "loot.js").write_text("const KEY='hunter2';", encoding="utf-8")
+        d = tmp_path / "soccer-scoreboard"
+        d.mkdir()
+        manifest = {"id": "soccer-scoreboard", "name": "soccer-scoreboard",
+                    "version": "1.0.0",
+                    "widgets": [{"name": "loot", "script": "loot.js"}]}
+        (d / "manifest.json").write_text(json.dumps(manifest), encoding="utf-8")
+        try:
+            (d / "widgets").symlink_to(outside, target_is_directory=True)
+        except (OSError, NotImplementedError):
+            pytest.skip("symlinks unavailable on this platform")
+        r = make_client().get(URL.format("soccer-scoreboard", "loot"))
+        assert r.status_code == 404
+        assert "hunter2" not in r.get_data(as_text=True)
+
+
 class TestDegradation:
     def test_an_unknown_plugin_is_404(self, tmp_path, make_client):
         assert make_client().get(URL.format("nope", "w")).status_code == 404
diff --git a/web_interface/app.py b/web_interface/app.py
index 3836ba09..fde87a2e 100644
--- a/web_interface/app.py
+++ b/web_interface/app.py
@@ -4,6 +4,7 @@ import logging
 import os
 import queue
 import re
+import gzip
 import shutil
 import sys
 import subprocess
@@ -69,10 +70,12 @@ except ImportError:
 # Enable gzip/brotli response compression (Flask-Compress skips streaming
 # responses, so the SSE endpoints are unaffected). Optional, like limiter:
 # missing package just means uncompressed responses.
+_HAVE_FLASK_COMPRESS = False
 try:
     from flask_compress import Compress
 
     Compress(app)
+    _HAVE_FLASK_COMPRESS = True
 except ImportError:
     logging.getLogger(__name__).warning(
         "flask-compress not installed - responses will be served uncompressed. "
@@ -500,6 +503,80 @@ def add_static_version(endpoint, values):
             pass
 
 
+# Gzip fallback for when flask-compress isn't installed. Without it the UI
+# ships ~1.2 MB of uncompressed JS to a phone over WiFi. Compressed bytes are
+# cached per URL+version, so the Pi compresses each asset once, not per request.
+# URL-versioned assets: safe to cache as immutable (and to gzip once).
+# /assets/ is the widget bundle from pages_v3 (also reachable under /v3).
+_VERSIONED_ASSET_PREFIXES = ('/static/', '/assets/', '/v3/assets/')
+_GZIP_MIN_BYTES = 1024
+_GZIP_TYPES = (
+    'text/html', 'text/css', 'text/plain', 'text/javascript',
+    'application/javascript', 'application/json', 'image/svg+xml',
+)
+_GZIP_CACHE_MAX_BYTES = 4 * 1024 * 1024
+_gzip_cache = {}
+_gzip_cache_bytes = 0
+_gzip_cache_lock = threading.Lock()
+
+
+@app.after_request
+def compress_text_responses(response):
+    """Gzip text responses when flask-compress is absent (SSE untouched)."""
+    if _HAVE_FLASK_COMPRESS or response.status_code != 200:
+        return response
+    if 'Content-Encoding' in response.headers:
+        return response
+    # send_file responses report is_streamed (they wrap a file) but have a
+    # known size; genuinely streamed bodies (SSE, generators) are left alone.
+    # SSE is also excluded by its text/event-stream mimetype below.
+    if response.is_streamed and not response.direct_passthrough:
+        return response
+    mimetype = (response.mimetype or '').lower()
+    if mimetype not in _GZIP_TYPES:
+        return response
+    if 'gzip' not in (request.headers.get('Accept-Encoding') or '').lower():
+        return response
+
+    cache_key = None
+    if request.path.startswith(_VERSIONED_ASSET_PREFIXES):
+        cache_key = (request.full_path, response.headers.get('Last-Modified'))
+        with _gzip_cache_lock:
+            cached = _gzip_cache.get(cache_key)
+        if cached is not None:
+            return _apply_gzip(response, cached)
+
+    # send_file responses stream from disk; materialize before compressing.
+    if response.direct_passthrough:
+        response.direct_passthrough = False
+    data = response.get_data()
+    if len(data) < _GZIP_MIN_BYTES:
+        return response
+    compressed = gzip.compress(data, compresslevel=6)
+    if len(compressed) >= len(data):
+        return response
+
+    if cache_key is not None:
+        global _gzip_cache_bytes
+        with _gzip_cache_lock:
+            if _gzip_cache_bytes + len(compressed) <= _GZIP_CACHE_MAX_BYTES:
+                _gzip_cache[cache_key] = compressed
+                _gzip_cache_bytes += len(compressed)
+    return _apply_gzip(response, compressed)
+
+
+def _apply_gzip(response, compressed):
+    response.set_data(compressed)
+    response.headers['Content-Encoding'] = 'gzip'
+    response.headers['Content-Length'] = str(len(compressed))
+    if 'accept-encoding' not in (response.headers.get('Vary') or '').lower():
+        response.headers.add('Vary', 'Accept-Encoding')
+    etag = response.headers.get('ETag')
+    if etag and 'gzip' not in etag:
+        response.headers['ETag'] = etag.rstrip('"') + '-gzip"'
+    return response
+
+
 # Add security headers and caching to all responses
 @app.after_request
 def add_security_headers(response):
@@ -511,7 +588,7 @@ def add_security_headers(response):
     response.headers['X-XSS-Protection'] = '1; mode=block'
     
     # Add caching headers for static assets
-    if request.path.startswith('/static/'):
+    if request.path.startswith(_VERSIONED_ASSET_PREFIXES):
         # Cache static assets for 1 year (with versioning via query params)
         response.headers['Cache-Control'] = 'public, max-age=31536000, immutable'
         response.headers['Expires'] = (datetime.now() + timedelta(days=365)).strftime('%a, %d %b %Y %H:%M:%S GMT')
diff --git a/web_interface/blueprints/pages_v3.py b/web_interface/blueprints/pages_v3.py
index b7467f8e..c91732e3 100644
--- a/web_interface/blueprints/pages_v3.py
+++ b/web_interface/blueprints/pages_v3.py
@@ -1,4 +1,4 @@
-from flask import Blueprint, render_template, flash, jsonify
+from flask import Blueprint, Response, render_template, flash, jsonify, url_for
 from jinja2 import TemplateNotFound
 from markupsafe import escape
 from html.parser import HTMLParser
@@ -14,6 +14,7 @@ _SAFE_WIDGET_NAME_RE = re.compile(r'^[a-zA-Z0-9_-]{1,64}$')
 _SAFE_WIDGET_SCRIPT_RE = re.compile(r'^[a-zA-Z0-9_-]{1,64}\.js$')
 from src.web_interface.secret_helpers import mask_secret_fields
 from src.common.path_safety import resolve_under, safe_path_component
+from web_interface import widget_bundle
 
 logger = logging.getLogger(__name__)
 
@@ -26,6 +27,30 @@ schema_manager = None
 pages_v3 = Blueprint('pages_v3', __name__)
 
 
+@pages_v3.route('/assets/widgets.js')
+def widgets_bundle():
+    """Every widget script in one request (see web_interface/widget_bundle.py).
+
+    The individual files stay served from /static for plugin-loader.js and
+    debugging; this saves the Pi ~30 round trips on each first page load.
+    Cached as immutable by app.py because the URL carries the version.
+    """
+    body, version = widget_bundle.build_bundle()
+    response = Response(body, mimetype='application/javascript')
+    response.headers['X-Widget-Bundle-Version'] = str(version)
+    return response
+
+
+@pages_v3.app_context_processor
+def inject_widget_bundle_url():
+    """`widgets_bundle_url()` for templates, versioned by file mtime."""
+    return {
+        'widgets_bundle_url': lambda: url_for(
+            'pages_v3.widgets_bundle', v=widget_bundle.bundle_version()
+        )
+    }
+
+
 class _SettingsIndexParser(HTMLParser):
     """Extract searchable settings fields from a rendered partial's HTML.
 
@@ -456,7 +481,11 @@ def serve_plugin_widget(plugin_id, widget_name):
             # to ship an undeclared file is not something to confirm.
             return 'Not found', 404, {'Content-Type': 'text/plain'}
 
-        widgets_dir = (plugin_dir / 'widgets').resolve()
+        # Contain widgets/ itself first: a symlinked widgets directory would
+        # otherwise become the base the script is checked against.
+        widgets_dir = resolve_under(plugin_dir, 'widgets')
+        if widgets_dir is None:
+            return 'Not found', 404, {'Content-Type': 'text/plain'}
         # The script name comes from the plugin's manifest, not the request,
         # so it gets the same containment treatment the URL parts got.
         script_path = resolve_under(widgets_dir, script)
diff --git a/web_interface/static/v3/app.css b/web_interface/static/v3/app.css
index 2f35fc41..cb260361 100644
--- a/web_interface/static/v3/app.css
+++ b/web_interface/static/v3/app.css
@@ -26,6 +26,9 @@
     --color-info-bg: #dbeafe;
     --color-purple-bg: #f3e8ff;
     --color-purple-text: #6b21a8;
+    --color-field-bg: #ffffff;
+    --color-field-border: #d1d5db;
+    --color-focus-ring: #2563eb;
     --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 5%);
     --shadow: 0 1px 3px 0 rgb(0 0 0 / 10%), 0 1px 2px 0 rgb(0 0 0 / 6%);
     --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 10%), 0 2px 4px -1px rgb(0 0 0 / 6%);
@@ -57,6 +60,9 @@
     --color-info-bg: #1e3a5f;
     --color-purple-bg: #2e1065;
     --color-purple-text: #c4b5fd;
+    --color-field-bg: #374151;
+    --color-field-border: #4b5563;
+    --color-focus-ring: #60a5fa;
     --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 30%);
     --shadow: 0 1px 3px 0 rgb(0 0 0 / 40%), 0 1px 2px 0 rgb(0 0 0 / 30%);
     --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 40%), 0 2px 4px -1px rgb(0 0 0 / 30%);
@@ -105,6 +111,77 @@ body {
     background-color: var(--color-background);
 }
 
+/* Border utilities (.border, .border-t, ...) set width and style only; this
+   gives them the theme's border color unless a border-* color class says
+   otherwise. */
+*, ::before, ::after {
+    border-color: var(--color-border);
+}
+
+/* Button reset. Markup styles buttons with utility classes (bg-*, px-*,
+   border); without it, any button the classes don't fully style falls back to
+   the browser's gray outset look. Element selector, so every class wins. */
+:where(button) {
+    font: inherit;
+    color: inherit;
+    line-height: inherit;
+    background-color: transparent;
+    background-image: none;
+    border-width: 0;
+    border-style: solid;
+    padding: 0;
+    cursor: pointer;
+}
+
+:where(button:disabled) {
+    cursor: not-allowed;
+}
+
+/* Inline code (paths, commands) must not push a row wider than a phone. */
+code {
+    overflow-wrap: anywhere;
+}
+
+/* One keyboard focus indicator for everything. Pointer clicks don't show it
+   (:focus-visible); components with their own ring keep theirs. */
+:focus-visible {
+    outline: 2px solid var(--color-focus-ring);
+    outline-offset: 2px;
+}
+
+::selection {
+    background-color: rgb(37 99 235 / 25%);
+}
+
+[data-theme="dark"] ::selection {
+    background-color: rgb(96 165 250 / 35%);
+}
+
+html {
+    scrollbar-color: #94a3b8 transparent;
+}
+
+html[data-theme="dark"] {
+    scrollbar-color: #4b5563 transparent;
+}
+
+.skip-link {
+    position: absolute;
+    left: 0.75rem;
+    top: -4rem;
+    z-index: 100;
+    padding: 0.625rem 1rem;
+    border-radius: 0.375rem;
+    background-color: var(--color-surface);
+    color: var(--color-primary);
+    font-weight: 600;
+    box-shadow: var(--shadow-lg);
+}
+
+.skip-link:focus {
+    top: 0.75rem;
+}
+
 /* Utility classes */
 .bg-gray-50 { background-color: #f9fafb; }
 .bg-gray-100 { background-color: #f3f4f6; }
@@ -285,10 +362,10 @@ h4 { font-size: 1.125rem; }
 .hover\:text-gray-700:hover { color: #374151; }
 .hover\:border-gray-300:hover { border-color: #d1d5db; }
 
-.focus\:outline-none:focus { outline: 2px solid transparent; outline-offset: 2px; }
+/* Only suppress the outline for pointer focus; keyboard focus keeps it. */
+.focus\:outline-none:focus:not(:focus-visible) { outline: 2px solid transparent; outline-offset: 2px; }
 .focus\:ring-2:focus {
-    --tw-ring-offset-shadow: var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);
-    box-shadow: var(--tw-ring-offset-shadow), var(--tw-shadow, 0 0 #0000);
+    box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), 0 0 0 calc(2px + var(--tw-ring-offset-width, 0px)) var(--tw-ring-color, rgb(59 130 246 / 50%)), var(--tw-shadow, 0 0 #0000);
 }
 /* Optimized: Split complex selector onto multiple lines for readability */
 .focus\:ring-blue-500:focus { --tw-ring-color: #3b82f6; }
@@ -353,12 +430,16 @@ a, button, input, select, textarea {
     overflow-y: auto !important;
 }
 
-/* Ensure logs content doesn't cause overflow issues */
+/* Ensure logs content doesn't cause overflow issues. content-visibility lets
+   the Pi skip layout and paint for the rows scrolled out of view; the
+   intrinsic size keeps the scrollbar stable. */
 .log-entry {
     word-wrap: break-word;
     overflow-wrap: break-word;
     max-width: 100%;
     box-sizing: border-box;
+    content-visibility: auto;
+    contain-intrinsic-size: auto 1.5rem;
 }
 
 /* Ensure proper containment of logs */
@@ -398,17 +479,356 @@ a, button, input, select, textarea {
 /* Logs container responsive height - simplified for better scrolling */
 @media (max-width: 768px) {
     #logs-container {
-        height: 400px !important;
-        min-height: 300px !important;
+        height: clamp(260px, 60vh, 480px) !important;
+        height: clamp(260px, 60svh, 480px) !important;
+        min-height: 0 !important;
     }
 }
 
-@media (max-width: 640px) {
-    #logs-container {
-        height: 350px !important;
-        min-height: 250px !important;
-    }
-}
+/* ===== Utility layer (fills the Tailwind-style gaps) =====
+   Templates and JS are authored in Tailwind class names, but there is no
+   Tailwind build: this file is the whole stylesheet. Every utility class the
+   markup uses must be defined here or it silently does nothing
+   (test/test_web_static_audit.py enforces this). Values follow Tailwind v3.
+   Keep `.hidden` after the display utilities so JS show/hide wins. */
+.-translate-y-1\/2 { --tw-translate-y: -50%; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.accent-blue-600 { accent-color: #2563eb; }
+.align-bottom { vertical-align: bottom; }
+.appearance-none { appearance: none; -webkit-appearance: none; }
+.backdrop-blur-sm { backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
+.bg-amber-100 { --tw-bg-opacity: 1; background-color: rgb(254 243 199 / var(--tw-bg-opacity, 1)); }
+.bg-amber-50 { --tw-bg-opacity: 1; background-color: rgb(255 251 235 / var(--tw-bg-opacity, 1)); }
+.bg-amber-500\/10 { background-color: rgb(245 158 11 / 0.1); }
+.bg-amber-600 { --tw-bg-opacity: 1; background-color: rgb(217 119 6 / var(--tw-bg-opacity, 1)); }
+.bg-black { --tw-bg-opacity: 1; background-color: rgb(0 0 0 / var(--tw-bg-opacity, 1)); }
+.bg-blue-100 { --tw-bg-opacity: 1; background-color: rgb(219 234 254 / var(--tw-bg-opacity, 1)); }
+.bg-blue-50 { --tw-bg-opacity: 1; background-color: rgb(239 246 255 / var(--tw-bg-opacity, 1)); }
+.bg-gray-300 { --tw-bg-opacity: 1; background-color: rgb(209 213 219 / var(--tw-bg-opacity, 1)); }
+.bg-gray-400 { --tw-bg-opacity: 1; background-color: rgb(156 163 175 / var(--tw-bg-opacity, 1)); }
+.bg-gray-500 { --tw-bg-opacity: 1; background-color: rgb(107 114 128 / var(--tw-bg-opacity, 1)); }
+.bg-gray-600 { --tw-bg-opacity: 1; background-color: rgb(75 85 99 / var(--tw-bg-opacity, 1)); }
+.bg-green-50 { --tw-bg-opacity: 1; background-color: rgb(240 253 244 / var(--tw-bg-opacity, 1)); }
+.bg-opacity-20 { --tw-bg-opacity: 0.2; }
+.bg-opacity-70 { --tw-bg-opacity: 0.7; }
+.bg-opacity-75 { --tw-bg-opacity: 0.75; }
+.bg-purple-100 { --tw-bg-opacity: 1; background-color: rgb(243 232 255 / var(--tw-bg-opacity, 1)); }
+.bg-purple-50 { --tw-bg-opacity: 1; background-color: rgb(250 245 255 / var(--tw-bg-opacity, 1)); }
+.bg-purple-700 { --tw-bg-opacity: 1; background-color: rgb(126 34 206 / var(--tw-bg-opacity, 1)); }
+.bg-red-50 { --tw-bg-opacity: 1; background-color: rgb(254 242 242 / var(--tw-bg-opacity, 1)); }
+.bg-red-800 { --tw-bg-opacity: 1; background-color: rgb(153 27 27 / var(--tw-bg-opacity, 1)); }
+.bg-yellow-50 { --tw-bg-opacity: 1; background-color: rgb(254 252 232 / var(--tw-bg-opacity, 1)); }
+.block { display: block; }
+.border { border-width: 1px; border-style: solid; }
+.border-2 { border-width: 2px; border-style: solid; }
+.border-amber-200 { border-color: #fde68a; }
+.border-amber-300 { border-color: #fcd34d; }
+.border-amber-500\/60 { border-color: rgb(245 158 11 / 0.6); }
+.border-blue-200 { border-color: #bfdbfe; }
+.border-blue-300 { border-color: #93c5fd; }
+.border-dashed { border-style: dashed; }
+.border-gray-100 { border-color: #f3f4f6; }
+.border-gray-400 { border-color: #9ca3af; }
+.border-gray-600 { border-color: #4b5563; }
+.border-green-200 { border-color: #bbf7d0; }
+.border-green-300 { border-color: #86efac; }
+.border-green-400 { border-color: #4ade80; }
+.border-green-500 { border-color: #22c55e; }
+.border-l-0 { border-left-width: 0px; border-left-style: solid; }
+.border-purple-200 { border-color: #e9d5ff; }
+.border-purple-300 { border-color: #d8b4fe; }
+.border-r-0 { border-right-width: 0px; border-right-style: solid; }
+.border-red-200 { border-color: #fecaca; }
+.border-red-300 { border-color: #fca5a5; }
+.border-red-400 { border-color: #f87171; }
+.border-red-500 { border-color: #ef4444; }
+.border-t { border-top-width: 1px; border-top-style: solid; }
+.border-yellow-200 { border-color: #fef08a; }
+.border-yellow-300 { border-color: #fde047; }
+.border-yellow-400 { border-color: #facc15; }
+.break-all { word-break: break-all; }
+.break-words { overflow-wrap: break-word; }
+.capitalize { text-transform: capitalize; }
+.col-span-full { grid-column: 1 / -1; }
+.cursor-move { cursor: move; }
+.cursor-not-allowed { cursor: not-allowed; }
+.cursor-pointer { cursor: pointer; }
+.cursor-wait { cursor: wait; }
+.divide-gray-100 > :not(:first-child) { border-color: #f3f4f6; }
+.divide-gray-200 > :not(:first-child) { border-color: #e5e7eb; }
+.divide-y > :not(:first-child) { border-top-width: 1px; border-top-style: solid; }
+.duration-150 { transition-duration: 150ms; }
+.duration-200 { transition-duration: 200ms; }
+.duration-300 { transition-duration: 300ms; }
+.ease-in-out { transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }
+.ease-out { transition-timing-function: cubic-bezier(0, 0, 0.2, 1); }
+.flex-\[3\] { flex: 3 1 0%; }
+.flex-col { flex-direction: column; }
+.font-mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; }
+.font-normal { font-weight: 400; }
+.gap-1 { gap: 0.25rem; }
+.h-1 { height: 0.25rem; }
+.h-12 { height: 3rem; }
+.h-20 { height: 5rem; }
+.h-3 { height: 0.75rem; }
+.h-40 { height: 10rem; }
+.h-5 { height: 1.25rem; }
+.h-6 { height: 1.5rem; }
+.h-64 { height: 16rem; }
+.h-7 { height: 1.75rem; }
+.h-8 { height: 2rem; }
+.h-9 { height: 2.25rem; }
+.h-full { height: 100%; }
+.inline { display: inline; }
+.inline-block { display: inline-block; }
+.inset-0 { inset: 0px; }
+.inset-y-0 { top: 0px; bottom: 0px; }
+.italic { font-style: italic; }
+.items-end { align-items: flex-end; }
+.items-start { align-items: flex-start; }
+.justify-end { justify-content: flex-end; }
+.leading-6 { line-height: 1.5rem; }
+.leading-none { line-height: 1; }
+.left-0 { left: 0px; }
+.left-3 { left: 0.75rem; }
+.left-\[3px\] { left: 3px; }
+.line-clamp-2 { overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
+.line-through { text-decoration-line: line-through; }
+.list-disc { list-style-type: disc; }
+.list-inside { list-style-position: inside; }
+.max-h-32 { max-height: 8rem; }
+.max-h-48 { max-height: 12rem; }
+.max-h-64 { max-height: 16rem; }
+.max-h-96 { max-height: 24rem; }
+.max-h-screen { max-height: 100vh; }
+.max-w-\[14rem\] { max-width: 14rem; }
+.max-w-lg { max-width: 32rem; }
+.max-w-md { max-width: 28rem; }
+.max-w-xs { max-width: 20rem; }
+.mb-1 { margin-bottom: 0.25rem; }
+.mb-5 { margin-bottom: 1.25rem; }
+.min-h-\[100px\] { min-height: 100px; }
+.min-h-screen { min-height: 100vh; }
+.min-w-\[12rem\] { min-width: 12rem; }
+.min-w-full { min-width: 100%; }
+.ml-1 { margin-left: 0.25rem; }
+.ml-1\.5 { margin-left: 0.375rem; }
+.ml-2 { margin-left: 0.5rem; }
+.ml-4 { margin-left: 1rem; }
+.ml-5 { margin-left: 1.25rem; }
+.ml-6 { margin-left: 1.5rem; }
+.ml-auto { margin-left: auto; }
+.mr-1 { margin-right: 0.25rem; }
+.mr-3 { margin-right: 0.75rem; }
+.mt-0\.5 { margin-top: 0.125rem; }
+.mt-8 { margin-top: 2rem; }
+.mt-auto { margin-top: auto; }
+.mx-2 { margin-left: 0.5rem; margin-right: 0.5rem; }
+.my-2 { margin-top: 0.5rem; margin-bottom: 0.5rem; }
+.object-cover { object-fit: cover; }
+.opacity-50 { opacity: 0.5; }
+.opacity-60 { opacity: 0.6; }
+.opacity-70 { opacity: 0.7; }
+.overflow-auto { overflow: auto; }
+.overflow-y-auto { overflow-y: auto; }
+.p-0 { padding: 0px; }
+.p-0\.5 { padding: 0.125rem; }
+.p-1 { padding: 0.25rem; }
+.pb-20 { padding-bottom: 5rem; }
+.pb-3 { padding-bottom: 0.75rem; }
+.pl-3 { padding-left: 0.75rem; }
+.pl-5 { padding-left: 1.25rem; }
+.pl-8 { padding-left: 2rem; }
+.pl-9 { padding-left: 2.25rem; }
+.pointer-events-auto { pointer-events: auto; }
+.pointer-events-none { pointer-events: none; }
+.pr-10 { padding-right: 2.5rem; }
+.pr-2 { padding-right: 0.5rem; }
+.pr-20 { padding-right: 5rem; }
+.pr-3 { padding-right: 0.75rem; }
+.pr-4 { padding-right: 1rem; }
+.pr-8 { padding-right: 2rem; }
+.pt-2 { padding-top: 0.5rem; }
+.pt-3 { padding-top: 0.75rem; }
+.pt-4 { padding-top: 1rem; }
+.pt-5 { padding-top: 1.25rem; }
+.pt-6 { padding-top: 1.5rem; }
+.pt-8 { padding-top: 2rem; }
+.px-1 { padding-left: 0.25rem; padding-right: 0.25rem; }
+.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
+.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
+.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
+.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
+.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
+.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
+.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
+.right-0 { right: 0px; }
+.right-2 { right: 0.5rem; }
+.ring-0 { box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), 0 0 0 var(--tw-ring-offset-width, 0px) var(--tw-ring-color, transparent); }
+.rounded-b-lg { border-bottom-left-radius: 0.5rem; border-bottom-right-radius: 0.5rem; }
+.rounded-l-md { border-top-left-radius: 0.375rem; border-bottom-left-radius: 0.375rem; }
+.rounded-r-lg { border-top-right-radius: 0.5rem; border-bottom-right-radius: 0.5rem; }
+.rounded-r-md { border-top-right-radius: 0.375rem; border-bottom-right-radius: 0.375rem; }
+.rounded-t-lg { border-top-left-radius: 0.5rem; border-top-right-radius: 0.5rem; }
+.self-center { align-self: center; }
+.shadow-inner { box-shadow: inset 0 2px 4px 0 rgb(0 0 0 / 5%); }
+.shadow-xl { box-shadow: 0 20px 25px -5px rgb(0 0 0 / 10%), 0 8px 10px -6px rgb(0 0 0 / 10%); }
+.shrink-0 { flex-shrink: 0; }
+.space-x-3 > * + * { margin-left: 0.75rem; }
+.space-y-3 > * + * { margin-top: 0.75rem; }
+.space-y-5 > * + * { margin-top: 1.25rem; }
+.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0; }
+.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
+.text-amber-200\/90 { color: rgb(253 230 138 / 0.9); }
+.text-amber-300 { color: #fcd34d; }
+.text-amber-500 { color: #f59e0b; }
+.text-amber-600 { color: #d97706; }
+.text-amber-700 { color: #b45309; }
+.text-amber-800 { color: #92400e; }
+.text-amber-900 { color: #78350f; }
+.text-black { color: #000000; }
+.text-blue-400 { color: #60a5fa; }
+.text-blue-500 { color: #3b82f6; }
+.text-blue-600 { color: #2563eb; }
+.text-blue-700 { color: #1d4ed8; }
+.text-blue-800 { color: #1e40af; }
+.text-blue-900 { color: #1e3a8a; }
+.text-center { text-align: center; }
+.text-gray-700 { color: #374151; }
+.text-gray-800 { color: #1f2937; }
+.text-green-500 { color: #22c55e; }
+.text-green-700 { color: #15803d; }
+.text-green-900 { color: #14532d; }
+.text-left { text-align: left; }
+.text-md { font-size: 1rem; line-height: 1.5rem; }
+.text-purple-600 { color: #9333ea; }
+.text-purple-700 { color: #7e22ce; }
+.text-purple-800 { color: #6b21a8; }
+.text-red-400 { color: #f87171; }
+.text-red-500 { color: #ef4444; }
+.text-red-700 { color: #b91c1c; }
+.text-red-900 { color: #7f1d1d; }
+.text-right { text-align: right; }
+.text-yellow-400 { color: #facc15; }
+.text-yellow-500 { color: #eab308; }
+.text-yellow-600 { color: #ca8a04; }
+.text-yellow-700 { color: #a16207; }
+.text-yellow-900 { color: #713f12; }
+.top-1\/2 { top: 50%; }
+.top-2 { top: 0.5rem; }
+.top-\[3px\] { top: 3px; }
+.tracking-wider { letter-spacing: 0.05em; }
+.transform { transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
+.transition-colors { transition-property: color, background-color, border-color, fill, stroke; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
+.transition-opacity { transition-property: opacity; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
+.transition-shadow { transition-property: box-shadow; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
+.transition-transform { transition-property: transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
+.translate-x-0 { --tw-translate-x: 0px; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.translate-x-1 { --tw-translate-x: 0.25rem; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.translate-x-5 { --tw-translate-x: 1.25rem; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.translate-x-6 { --tw-translate-x: 1.5rem; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.translate-x-full { --tw-translate-x: 100%; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.underline { text-decoration-line: underline; text-underline-offset: 0.15em; }
+.uppercase { text-transform: uppercase; }
+.w-1\/2 { width: 50%; }
+.w-1\/3 { width: 33.333333%; }
+.w-1\/4 { width: 25%; }
+.w-10 { width: 2.5rem; }
+.w-11 { width: 2.75rem; }
+.w-12 { width: 3rem; }
+.w-14 { width: 3.5rem; }
+.w-16 { width: 4rem; }
+.w-2\/3 { width: 66.666667%; }
+.w-2\/5 { width: 40%; }
+.w-20 { width: 5rem; }
+.w-24 { width: 6rem; }
+.w-3 { width: 0.75rem; }
+.w-3\/4 { width: 75%; }
+.w-3\/5 { width: 60%; }
+.w-32 { width: 8rem; }
+.w-4\/5 { width: 80%; }
+.w-4\/6 { width: 66.666667%; }
+.w-48 { width: 12rem; }
+.w-5 { width: 1.25rem; }
+.w-5\/6 { width: 83.333333%; }
+.w-6 { width: 1.5rem; }
+.w-8 { width: 2rem; }
+.w-80 { width: 20rem; }
+.w-96 { width: 24rem; }
+.w-px { width: 1px; }
+.whitespace-nowrap { white-space: nowrap; }
+.whitespace-pre-wrap { white-space: pre-wrap; }
+.-m-2 { margin: -0.5rem; }
+.list-none { list-style-type: none; }
+.pl-0 { padding-left: 0px; }
+.w-auto { width: auto; }
+.pb-1 { padding-bottom: 0.25rem; }
+.hidden { display: none; }
+
+/* State and pseudo variants */
+.disabled\:bg-gray-400:disabled { --tw-bg-opacity: 1; background-color: rgb(156 163 175 / var(--tw-bg-opacity, 1)); }
+.disabled\:cursor-not-allowed:disabled { cursor: not-allowed; }
+.disabled\:opacity-50:disabled { opacity: 0.5; }
+.disabled\:text-gray-400:disabled { color: #6b7280; }
+.file\:bg-blue-50::file-selector-button { --tw-bg-opacity: 1; background-color: rgb(239 246 255 / var(--tw-bg-opacity, 1)); }
+.file\:border-0::file-selector-button { border-width: 0px; }
+.file\:font-medium::file-selector-button { font-weight: 500; }
+.file\:mr-4::file-selector-button { margin-right: 1rem; }
+.file\:px-4::file-selector-button { padding-left: 1rem; padding-right: 1rem; }
+.file\:py-2::file-selector-button { padding-top: 0.5rem; padding-bottom: 0.5rem; }
+.file\:rounded-md::file-selector-button { border-radius: 0.375rem; }
+.file\:text-blue-700::file-selector-button { color: #1d4ed8; }
+.file\:text-sm::file-selector-button { font-size: 0.875rem; line-height: 1.25rem; }
+.first\:border-t-0:first-child { border-top-width: 0px; border-top-style: solid; }
+.focus\:border-blue-500:focus { border-color: #3b82f6; }
+.focus\:ring-indigo-500:focus { --tw-ring-color: #6366f1; }
+.focus\:ring-offset-2:focus { --tw-ring-offset-width: 2px; --tw-ring-offset-shadow: 0 0 0 2px var(--color-surface, #fff); }
+.focus\:shadow-md:focus { box-shadow: var(--shadow-md); }
+.group:hover .group-hover\:scale-105 { --tw-scale-x: 1.05; --tw-scale-y: 1.05; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.hover\:bg-amber-50:hover { --tw-bg-opacity: 1; background-color: rgb(255 251 235 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-amber-700:hover { --tw-bg-opacity: 1; background-color: rgb(180 83 9 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-blue-100:hover { --tw-bg-opacity: 1; background-color: rgb(219 234 254 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-blue-50:hover { --tw-bg-opacity: 1; background-color: rgb(239 246 255 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-blue-700:hover { --tw-bg-opacity: 1; background-color: rgb(29 78 216 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-gray-100:hover { --tw-bg-opacity: 1; background-color: rgb(243 244 246 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-gray-300:hover { --tw-bg-opacity: 1; background-color: rgb(209 213 219 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-gray-400:hover { --tw-bg-opacity: 1; background-color: rgb(156 163 175 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-gray-700:hover { --tw-bg-opacity: 1; background-color: rgb(55 65 81 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-opacity-20:hover { --tw-bg-opacity: 0.2; }
+.hover\:bg-opacity-30:hover { --tw-bg-opacity: 0.3; }
+.hover\:bg-red-50:hover { --tw-bg-opacity: 1; background-color: rgb(254 242 242 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-red-900:hover { --tw-bg-opacity: 1; background-color: rgb(127 29 29 / var(--tw-bg-opacity, 1)); }
+.hover\:bg-white:hover { --tw-bg-opacity: 1; background-color: rgb(255 255 255 / var(--tw-bg-opacity, 1)); }
+.hover\:border-blue-400:hover { border-color: #60a5fa; }
+.hover\:file\:bg-blue-100::file-selector-button:hover { --tw-bg-opacity: 1; background-color: rgb(219 234 254 / var(--tw-bg-opacity, 1)); }
+.hover\:opacity-100:hover { opacity: 1; }
+.hover\:scale-110:hover { --tw-scale-x: 1.1; --tw-scale-y: 1.1; transform: translate(var(--tw-translate-x, 0), var(--tw-translate-y, 0)) rotate(var(--tw-rotate, 0)) scale(var(--tw-scale-x, 1), var(--tw-scale-y, 1)); }
+.hover\:shadow-md:hover { box-shadow: var(--shadow-md); }
+.hover\:text-blue-600:hover { color: #2563eb; }
+.hover\:text-blue-700:hover { color: #1d4ed8; }
+.hover\:text-blue-800:hover { color: #1e40af; }
+.hover\:text-gray-600:hover { color: #374151; }
+.hover\:text-gray-900:hover { color: #111827; }
+.hover\:text-red-300:hover { color: #fca5a5; }
+.hover\:text-red-600:hover { color: #dc2626; }
+.hover\:text-red-800:hover { color: #991b1b; }
+.hover\:text-red-900:hover { color: #7f1d1d; }
+.hover\:text-white:hover { color: #ffffff; }
+.hover\:text-yellow-700:hover { color: #a16207; }
+.hover\:text-yellow-800:hover { color: #854d0e; }
+.hover\:text-yellow-900:hover { color: #713f12; }
+.hover\:underline:hover { text-decoration-line: underline; text-underline-offset: 0.15em; }
+.last\:border-0:last-child { border-width: 0px; }
+.peer:checked ~ .peer-checked\:bg-green-500 { --tw-bg-opacity: 1; background-color: rgb(34 197 94 / var(--tw-bg-opacity, 1)); }
+.peer:focus-visible ~ .peer-focus\:outline-none { outline: 2px solid transparent; outline-offset: 2px; }
+.peer:focus-visible ~ .peer-focus\:ring-4 { box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), 0 0 0 calc(4px + var(--tw-ring-offset-width, 0px)) var(--tw-ring-color, rgb(59 130 246 / 50%)), var(--tw-shadow, 0 0 #0000); }
+.peer:focus-visible ~ .peer-focus\:ring-blue-300 { --tw-ring-color: #93c5fd; }
+.placeholder\:text-gray-400::placeholder { color: #6b7280; }
+.placeholder\:text-gray-500::placeholder { color: #4b5563; }
+
+.hover\:bg-gray-200:hover { --tw-bg-opacity: 1; background-color: rgb(229 231 235 / var(--tw-bg-opacity, 1)); }
+
+.hover\:text-gray-800:hover { color: #1f2937; }
 
 /* Responsive breakpoints */
 @media (min-width: 640px) {
@@ -416,6 +836,30 @@ a, button, input, select, textarea {
     .sm\:block { display: block; }
     .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
     .sm\:text-sm { font-size: 0.875rem; line-height: 1.25rem; }
+    .sm\:align-middle { vertical-align: middle; }
+    .sm\:flex { display: flex; }
+    .sm\:flex-row-reverse { flex-direction: row-reverse; }
+    .sm\:h-10 { height: 2.5rem; }
+    .sm\:hidden { display: none; }
+    .sm\:inline { display: inline; }
+    .sm\:items-start { align-items: flex-start; }
+    .sm\:max-w-4xl { max-width: 56rem; }
+    .sm\:max-w-lg { max-width: 32rem; }
+    .sm\:ml-3 { margin-left: 0.75rem; }
+    .sm\:ml-4 { margin-left: 1rem; }
+    .sm\:mt-0 { margin-top: 0px; }
+    .sm\:mx-0 { margin-left: 0px; margin-right: 0px; }
+    .sm\:my-8 { margin-top: 2rem; margin-bottom: 2rem; }
+    .sm\:p-0 { padding: 0px; }
+    .sm\:p-6 { padding: 1.5rem; }
+    .sm\:pb-4 { padding-bottom: 1rem; }
+    .sm\:text-left { text-align: left; }
+    .sm\:text-xl { font-size: 1.25rem; line-height: 1.75rem; }
+    .sm\:w-10 { width: 2.5rem; }
+    .sm\:w-auto { width: auto; }
+    .sm\:w-full { width: 100%; }
+    .sm\:flex-nowrap { flex-wrap: nowrap; }
+    .sm\:gap-4 { gap: 1rem; }
 }
 
 @media (min-width: 768px) {
@@ -601,8 +1045,9 @@ a, button, input, select, textarea {
     opacity: 0.5;
 }
 
-/* Enhanced Button styles */
-.btn {
+/* Enhanced Button styles. :where() keeps the base at zero specificity so
+   utility classes on the same element (px-3 py-1, rounded) take effect. */
+:where(.btn) {
     display: inline-flex;
     align-items: center;
     justify-content: center;
@@ -637,10 +1082,9 @@ a, button, input, select, textarea {
     transform: none;
 }
 
-.btn:focus {
-    outline: 2px solid transparent;
+.btn:focus-visible {
+    outline: 2px solid var(--color-focus-ring);
     outline-offset: 2px;
-    box-shadow: 0 0 0 3px rgb(37 99 235 / 30%);
 }
 
 /* Global button text contrast fix: Ensure buttons with white backgrounds have dark text */
@@ -661,14 +1105,16 @@ button.bg-white {
     margin-bottom: 0.25rem;
 }
 
-.form-control {
+/* :where() so utilities on the field (pl-8 for a search icon, w-48,
+   h-4 w-4 on checkboxes) override the component defaults. */
+:where(.form-control) {
     display: block;
     width: 100%;
     padding: 0.5rem 0.75rem;
-    border: 1px solid #d1d5db;
+    border: 1px solid var(--color-field-border);
     border-radius: 0.375rem;
-    background-color: #ffffff;
-    color: #111827; /* text-gray-900 - ensure dark text on white background */
+    background-color: var(--color-field-bg);
+    color: var(--color-text-primary);
     font-size: 0.875rem;
     line-height: 1.25rem;
     transition: border-color 0.15s ease-in-out;
@@ -678,12 +1124,12 @@ button.bg-white {
 .form-control:focus {
     border-color: var(--color-primary);
     /* Using outline instead of box-shadow for focus state (better performance) */
-    outline: 2px solid rgb(37 99 235 / 20%);
-    outline-offset: 2px;
+    outline: 2px solid var(--color-focus-ring);
+    outline-offset: 1px;
 }
 
 .form-control:disabled {
-    background-color: #f9fafb;
+    background-color: var(--color-background);
     opacity: 0.6;
     cursor: not-allowed;
 }
@@ -718,28 +1164,12 @@ button.bg-white {
     /* Added CSS containment for better performance isolation */
 }
 
-.plugin-card::before {
-    content: '';
-    position: absolute;
-    top: 0;
-    left: 0;
-    right: 0;
-    height: 3px;
-    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
-    opacity: 0;
-    transition: opacity 0.15s ease;
-}
-
 .plugin-card:hover {
     transform: translateY(-2px);
     border-color: var(--color-primary);
     /* Removed box-shadow transition for better performance */
 }
 
-.plugin-card:hover::before {
-    opacity: 1;
-}
-
 .plugin-card:focus {
     outline: 2px solid var(--color-primary);
     outline-offset: 2px;
@@ -1080,7 +1510,7 @@ button.bg-white {
     font-size: 0.875rem;
     font-weight: 500;
     line-height: 1.5;
-    color: #374151; /* text-gray-700 for better readability */
+    color: var(--color-text-secondary);
     white-space: nowrap;
     transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
     cursor: pointer;
@@ -1097,30 +1527,30 @@ button.bg-white {
 
 /* Inactive state - improved contrast */
 .nav-tab:not(.nav-tab-active) {
-    color: #374151; /* text-gray-700 */
+    color: var(--color-text-secondary);
 }
 
 .nav-tab:not(.nav-tab-active) i {
-    color: #374151; /* text-gray-700 */
+    color: var(--color-text-secondary);
 }
 
 /* Hover state - enhanced visibility */
 .nav-tab:not(.nav-tab-active):hover {
-    color: #111827; /* text-gray-900 */
-    background-color: #f3f4f6; /* bg-gray-100 */
-    border-bottom-color: #d1d5db; /* border-gray-300 */
+    color: var(--color-text-primary);
+    background-color: var(--color-border-light);
+    border-bottom-color: var(--color-border);
 }
 
 .nav-tab:not(.nav-tab-active):hover i {
-    color: #111827; /* text-gray-900 */
+    color: var(--color-text-primary);
 }
 
 /* Active state - prominent with gradient background */
 .nav-tab-active {
-    color: #1d4ed8; /* text-blue-700 */
+    color: var(--color-primary-hover);
     font-weight: 600;
     border-bottom-width: 3px;
-    border-bottom-color: #2563eb; /* border-blue-600 */
+    border-bottom-color: var(--color-primary);
     background: linear-gradient(135deg, rgb(37 99 235 / 10%) 0%, rgb(59 130 246 / 5%) 100%);
     box-shadow: 0 2px 4px rgb(37 99 235 / 10%);
 }
@@ -1155,17 +1585,6 @@ button.bg-white {
 }
 
 /* Form controls */
-[data-theme="dark"] .form-control {
-    background-color: var(--color-border);
-    color: var(--color-text-primary);
-    border-color: #4b5563;
-}
-
-[data-theme="dark"] .form-control:focus {
-    border-color: var(--color-primary);
-    outline-color: rgb(59 130 246 / 30%);
-}
-
 [data-theme="dark"] .form-control:disabled {
     background-color: var(--color-surface);
 }
@@ -1275,6 +1694,84 @@ button.bg-white {
 [data-theme="dark"] .text-green-800 { color: #6ee7b7; }
 [data-theme="dark"] .text-green-700 { color: #6ee7b7; }
 
+/* Dark theme for the generated color utilities */
+[data-theme="dark"] .bg-amber-100 { background-color: rgb(245 158 11 / 18%); }
+[data-theme="dark"] .bg-amber-50 { background-color: rgb(245 158 11 / 12%); }
+[data-theme="dark"] .bg-blue-100 { background-color: rgb(59 130 246 / 18%); }
+[data-theme="dark"] .bg-gray-300 { background-color: #4b5563; }
+[data-theme="dark"] .bg-gray-400 { background-color: #6b7280; }
+[data-theme="dark"] .bg-purple-100 { background-color: rgb(168 85 247 / 18%); }
+[data-theme="dark"] .bg-purple-50 { background-color: rgb(168 85 247 / 12%); }
+[data-theme="dark"] .border-amber-200 { border-color: rgb(245 158 11 / 40%); }
+[data-theme="dark"] .border-amber-300 { border-color: rgb(245 158 11 / 55%); }
+[data-theme="dark"] .border-blue-300 { border-color: rgb(59 130 246 / 55%); }
+[data-theme="dark"] .border-gray-100 { border-color: var(--color-border); }
+[data-theme="dark"] .border-gray-400 { border-color: #6b7280; }
+[data-theme="dark"] .border-green-300 { border-color: rgb(34 197 94 / 55%); }
+[data-theme="dark"] .border-purple-200 { border-color: rgb(168 85 247 / 40%); }
+[data-theme="dark"] .border-purple-300 { border-color: rgb(168 85 247 / 55%); }
+[data-theme="dark"] .border-red-300 { border-color: rgb(239 68 68 / 55%); }
+[data-theme="dark"] .border-yellow-300 { border-color: rgb(234 179 8 / 55%); }
+[data-theme="dark"] .divide-gray-100 > :not(:first-child) { border-color: var(--color-border); }
+[data-theme="dark"] .divide-gray-200 > :not(:first-child) { border-color: var(--color-border); }
+[data-theme="dark"] .text-amber-500 { color: #fbbf24; }
+[data-theme="dark"] .text-amber-600 { color: #fcd34d; }
+[data-theme="dark"] .text-amber-700 { color: #fcd34d; }
+[data-theme="dark"] .text-amber-800 { color: #fcd34d; }
+[data-theme="dark"] .text-amber-900 { color: #fcd34d; }
+[data-theme="dark"] .text-black { color: var(--color-text-primary); }
+[data-theme="dark"] .text-blue-500 { color: #60a5fa; }
+[data-theme="dark"] .text-blue-600 { color: #93c5fd; }
+[data-theme="dark"] .text-blue-900 { color: #93c5fd; }
+[data-theme="dark"] .text-gray-700 { color: var(--color-text-secondary); }
+[data-theme="dark"] .text-gray-800 { color: var(--color-text-primary); }
+[data-theme="dark"] .text-green-500 { color: #4ade80; }
+[data-theme="dark"] .text-green-900 { color: #86efac; }
+[data-theme="dark"] .text-purple-600 { color: #d8b4fe; }
+[data-theme="dark"] .text-purple-700 { color: #d8b4fe; }
+[data-theme="dark"] .text-purple-800 { color: #d8b4fe; }
+[data-theme="dark"] .text-red-500 { color: #f87171; }
+[data-theme="dark"] .text-red-900 { color: #fca5a5; }
+[data-theme="dark"] .text-yellow-500 { color: #facc15; }
+[data-theme="dark"] .text-yellow-900 { color: #fde047; }
+[data-theme="dark"] .disabled\:bg-gray-400:disabled { background-color: #6b7280; }
+[data-theme="dark"] .file\:bg-blue-50::file-selector-button { background-color: rgb(59 130 246 / 12%); }
+[data-theme="dark"] .file\:text-blue-700::file-selector-button { color: #93c5fd; }
+[data-theme="dark"] .hover\:bg-amber-50:hover { background-color: rgb(245 158 11 / 12%); }
+[data-theme="dark"] .hover\:bg-blue-100:hover { background-color: rgb(59 130 246 / 18%); }
+[data-theme="dark"] .hover\:bg-blue-50:hover { background-color: rgb(59 130 246 / 12%); }
+[data-theme="dark"] .hover\:bg-gray-100:hover { background-color: var(--color-border); }
+[data-theme="dark"] .hover\:bg-gray-300:hover { background-color: #4b5563; }
+[data-theme="dark"] .hover\:bg-gray-400:hover { background-color: #6b7280; }
+[data-theme="dark"] .hover\:bg-red-50:hover { background-color: rgb(239 68 68 / 12%); }
+[data-theme="dark"] .hover\:file\:bg-blue-100::file-selector-button:hover { background-color: rgb(59 130 246 / 18%); }
+[data-theme="dark"] .hover\:text-blue-600:hover { color: #bfdbfe; }
+[data-theme="dark"] .hover\:text-blue-700:hover { color: #bfdbfe; }
+[data-theme="dark"] .hover\:text-blue-800:hover { color: #bfdbfe; }
+[data-theme="dark"] .hover\:text-gray-600:hover { color: var(--color-text-tertiary); }
+[data-theme="dark"] .hover\:text-gray-900:hover { color: var(--color-text-primary); }
+[data-theme="dark"] .hover\:text-red-600:hover { color: #fecaca; }
+[data-theme="dark"] .hover\:text-red-800:hover { color: #fecaca; }
+[data-theme="dark"] .hover\:text-red-900:hover { color: #fecaca; }
+[data-theme="dark"] .hover\:text-yellow-700:hover { color: #fef08a; }
+[data-theme="dark"] .hover\:text-yellow-800:hover { color: #fef08a; }
+[data-theme="dark"] .hover\:text-yellow-900:hover { color: #fef08a; }
+
+/* Dark theme for the generated color utilities */
+
+
+/* Dark theme for the generated color utilities */
+
+
+/* Dark theme for the generated color utilities */
+
+
+/* Dark theme for the generated color utilities */
+[data-theme="dark"] .hover\:text-gray-800:hover { color: var(--color-text-primary); }
+
+/* Dark theme for the generated color utilities */
+
+
 /* Theme toggle button */
 .theme-toggle-btn {
     display: inline-flex;
@@ -1432,10 +1929,10 @@ button.bg-white {
     position: sticky;
     left: 0;
     z-index: 1;
-    background-color: #ffffff;
+    background-color: var(--color-surface, #ffffff);
 }
 .style-editor-head > :first-child {
-    background-color: #f9fafb;
+    background-color: var(--color-background, #f9fafb);
 }
 .style-editor-row {
     /* Set by the widget: the column count depends on what the plugin
@@ -1455,27 +1952,27 @@ button.bg-white {
     width: 100%;
 }
 .style-editor-row input[type="number"]:disabled {
-    background-color: #f3f4f6;
-    color: #9ca3af;
+    background-color: var(--color-border-light, #f3f4f6);
+    color: var(--color-text-tertiary, #9ca3af);
     cursor: not-allowed;
 }
 .style-editor-colour {
     width: 2rem;
     height: 1.6rem;
     padding: 0;
-    border: 1px solid #d1d5db;
+    border: 1px solid var(--color-field-border, #d1d5db);
     border-radius: 0.25rem;
     background: none;
     cursor: pointer;
 }
 .style-editor-tab {
-    border: 1px solid #d1d5db;
-    background-color: #f9fafb;
-    color: #374151;
+    border: 1px solid var(--color-field-border, #d1d5db);
+    background-color: var(--color-background, #f9fafb);
+    color: var(--color-text-secondary, #374151);
 }
 .style-editor-tab.is-active {
-    background-color: #2563eb;
-    border-color: #2563eb;
+    background-color: var(--color-primary, #2563eb);
+    border-color: var(--color-primary, #2563eb);
     color: #ffffff;
 }
 .style-editor-panel[hidden] {
@@ -1494,3 +1991,90 @@ button.bg-white {
         font-weight: 600;
     }
 }
+
+/* A label wrapping a visually hidden file input shows the input's focus. */
+.file-trigger:focus-within {
+    outline: 2px solid var(--color-focus-ring);
+    outline-offset: 2px;
+}
+
+/* Dark theme: native fields that no component or utility styles would
+   otherwise keep the browser's white surface. */
+[data-theme="dark"] :where(input:not([type="checkbox"], [type="radio"], [type="range"], [type="color"], [type="file"]), select, textarea) {
+    background-color: var(--color-field-bg);
+    color: var(--color-text-primary);
+    border-color: var(--color-field-border);
+}
+
+[data-theme="dark"] ::placeholder {
+    color: #9ca3af;
+}
+
+/* Range tracks and native controls follow the theme accent instead of the
+   browser's default light chrome. */
+input[type="range"],
+input[type="checkbox"],
+input[type="radio"],
+progress {
+    accent-color: var(--color-primary);
+}
+
+/* ===== Guards that must stay at the end of the file ===== */
+
+/* `.hidden` has to beat component classes that set their own display. */
+.btn.hidden,
+.badge.hidden,
+.status-indicator.hidden,
+.help-tip.hidden,
+.nav-tab.hidden,
+.theme-toggle-btn.hidden {
+    display: none;
+}
+
+@media (min-width: 768px) {
+    /* .theme-toggle-btn (display: inline-flex) is declared after md:hidden,
+       which left the mobile menu button visible on desktop. */
+    .theme-toggle-btn.md\:hidden {
+        display: none;
+    }
+}
+
+/* Touch screens: controls in the page content get a 44px target. Switches
+   and inline help triggers keep their drawn size. */
+@media (pointer: coarse) {
+    #tab-content button:not([role="switch"], .help-tip),
+    #tab-content a.inline-flex,
+    #tab-content select,
+    #tab-content input:not([type="checkbox"], [type="radio"], [type="range"], [type="color"], [type="file"], .sr-only) {
+        min-height: 44px;
+    }
+}
+
+/* Reduced motion: no entrances, slides, pulses or smooth scrolling.
+   Spinners keep turning, slowly, because they are the only busy signal. */
+@media (prefers-reduced-motion: reduce) {
+    html,
+    #logs-container {
+        scroll-behavior: auto;
+    }
+    *,
+    ::before,
+    ::after {
+        animation-duration: 0.01ms !important;
+        animation-iteration-count: 1 !important;
+        transition-duration: 0.01ms !important;
+    }
+    .fa-spin,
+    .fa-spinner,
+    .animate-spin,
+    .jfm-spin,
+    .spinner {
+        animation-duration: 1.5s !important;
+        animation-iteration-count: infinite !important;
+    }
+    .card:hover,
+    .plugin-card:hover,
+    .btn:hover {
+        transform: none;
+    }
+}
diff --git a/web_interface/static/v3/app.js b/web_interface/static/v3/app.js
index 638204b3..31d770bb 100644
--- a/web_interface/static/v3/app.js
+++ b/web_interface/static/v3/app.js
@@ -2,20 +2,28 @@
 // LED Matrix v3 JavaScript
 // Additional helpers for HTMX and Alpine.js integration
 
-// Global notification system
-window.showNotification = function(message, type = 'info') {
-    // Use Alpine.js notification if available
-    if (window.Alpine) {
-        // This would trigger the Alpine.js notification system
-        const event = new CustomEvent('show-notification', {
+// Global notification system — implemented by widgets/notification.js.
+// This fallback only exists if nothing defined showNotification earlier; it
+// hands off to the widget when registered, otherwise queues the message for
+// the widget to show once it loads.
+if (typeof window.showNotification !== 'function') {
+    window.showNotification = function(message, type = 'info') {
+        const registry = window.LEDMatrixWidgets;
+        const widget = registry && typeof registry.get === 'function' ? registry.get('notification') : null;
+        if (widget && typeof widget.show === 'function') {
+            return widget.show(message, typeof type === 'string' ? { type: type } : (type || {}));
+        }
+        if (!Array.isArray(window.__pendingNotifications)) {
+            window.__pendingNotifications = [];
+        }
+        window.__pendingNotifications.push([message, type]);
+        document.dispatchEvent(new CustomEvent('show-notification', {
             detail: { message, type }
-        });
-        document.dispatchEvent(event);
-    } else {
-        // Fallback notification — user-facing last resort, so never gated
-        console.info(`${type}: ${message}`);
-    }
-};
+        }));
+        // User-facing last resort, so never gated
+        console.info(`${(type && type.type) || type}: ${message}`);
+    };
+}
 
 // HTMX response handlers
 document.body.addEventListener('htmx:beforeRequest', function(event) {
@@ -180,30 +188,8 @@ document.addEventListener('DOMContentLoaded', function() {
     } catch { /* no-op */ }
 });
 
-// SSE reconnection helper — closes and reopens both SSE streams,
-// reattaching the open/error handlers defined in base.html.
-window.reconnectSSE = function() {
-    if (window.statsSource) {
-        window.statsSource.close();
-        window.statsSource = new EventSource('/api/v3/stream/stats');
-        window.statsSource.onmessage = function(event) {
-            const data = JSON.parse(event.data);
-            if (typeof updateSystemStats === 'function') updateSystemStats(data);
-        };
-        if (window._statsOpenHandler) window.statsSource.addEventListener('open', window._statsOpenHandler);
-        if (window._statsErrorHandler) window.statsSource.addEventListener('error', window._statsErrorHandler);
-    }
-
-    if (window.displaySource) {
-        window.displaySource.close();
-        window.displaySource = new EventSource('/api/v3/stream/display');
-        window.displaySource.onmessage = function(event) {
-            const data = JSON.parse(event.data);
-            if (typeof updateDisplayPreview === 'function') updateDisplayPreview(data);
-        };
-        if (window._displayErrorHandler) window.displaySource.addEventListener('error', window._displayErrorHandler);
-    }
-};
+// SSE streams (and window.reconnectSSE) are owned by window.LEDStreams in
+// js/app-shell.js — do not open EventSources for stats/display here.
 
 // Utility functions
 window.hexToRgb = function(hex) {
@@ -462,6 +448,8 @@ window.updateFloatingPreviewVisibility = function(tab) {
             img.src = 'data:image/png;base64,' + window._lastPreviewFrame;
         }
     }
+    // The display SSE stream is only open while a preview is on screen
+    if (window.LEDStreams) window.LEDStreams.refresh();
 };
 
 document.addEventListener('DOMContentLoaded', function() {
diff --git a/web_interface/static/v3/js/app-shell.js b/web_interface/static/v3/js/app-shell.js
index 5f9ceb43..070919a2 100644
--- a/web_interface/static/v3/js/app-shell.js
+++ b/web_interface/static/v3/js/app-shell.js
@@ -1,24 +1,16 @@
 /* global debugLog */
 // SSE wiring + full Alpine app() implementation and tab logic
 // Extracted from templates/v3/base.html so browsers cache it as a static asset.
-        // Assign to window so reconnectSSE() in app.js can reach them.
-        window.statsSource = new EventSource('/api/v3/stream/stats');
-        window.displaySource = new EventSource('/api/v3/stream/display');
-
-        window.statsSource.onmessage = function(event) {
-            const data = JSON.parse(event.data);
-            updateSystemStats(data);
-        };
-
-        window.displaySource.onmessage = function(event) {
-            const data = JSON.parse(event.data);
-            updateDisplayPreview(data);
-        };
-
-        function _setConnectionStatus(connected, reconnecting) {
+        function _setConnectionStatus(connected, reconnecting, paused) {
             const el = document.getElementById('connection-status');
             if (!el) return;
-            if (connected) {
+            if (paused) {
+                // Intentionally closed while the page is hidden — not an error.
+                el.innerHTML = `
+                    <div class="w-2 h-2 bg-gray-200 border border-gray-300 rounded-full"></div>
+                    <span class="text-gray-600" title="Live updates pause while this page is in the background">Paused</span>
+                `;
+            } else if (connected) {
                 el.innerHTML = `
                     <div class="w-2 h-2 bg-green-500 rounded-full"></div>
                     <span class="text-gray-600">Connected</span>
@@ -38,8 +30,8 @@
 
         var _statsErrorCount = 0;
 
-        // Named on window so reconnectSSE() in app.js can reattach them after
-        // replacing the EventSource instances.
+        // Kept on window for backward compatibility; LEDStreams attaches them
+        // to every EventSource it opens.
         window._statsOpenHandler = function() {
             _statsErrorCount = 0;
             _setConnectionStatus(true, false);
@@ -56,9 +48,173 @@
             console.warn('LEDMatrix: display preview stream error (readyState=' + window.displaySource.readyState + ')');
         };
 
-        window.statsSource.addEventListener('open', window._statsOpenHandler);
-        window.statsSource.addEventListener('error', window._statsErrorHandler);
-        window.displaySource.addEventListener('error', window._displayErrorHandler);
+        // ===== Tab/page visibility — shared by partials =====
+        // LEDVisibility.onActive(tab, start, stop[, key]) runs start() when
+        // `tab` is the active tab AND the page is visible, and stop() when
+        // either stops being true. start() should refresh immediately. The
+        // registration is keyed (default: tab name), so a partial re-injected
+        // by HTMX replaces its previous registration — the old stop() runs
+        // first — instead of stacking intervals. Returns an unregister fn.
+        // Tab changes are also broadcast as `ledmatrix:tab-changed` on document.
+        window.LEDVisibility = (function() {
+            const regs = new Map();
+            let lastTab = null;
+
+            function activeTab() {
+                const el = document.querySelector('[x-data="app()"]');
+                const data = el && el._x_dataStack && el._x_dataStack[0];
+                return (data && data.activeTab) || lastTab;
+            }
+            function isActive(tab) {
+                return !document.hidden && activeTab() === tab;
+            }
+            function evaluate(reg) {
+                const want = isActive(reg.tab);
+                if (want === reg.running) return;
+                reg.running = want;
+                try {
+                    (want ? reg.start : reg.stop)();
+                } catch (e) {
+                    console.error('[LEDVisibility] ' + reg.key + (want ? ' start' : ' stop') + ' failed:', e);
+                }
+            }
+            function onActive(tab, start, stop, key) {
+                key = key || tab;
+                const prev = regs.get(key);
+                if (prev && prev.running) {
+                    prev.running = false;
+                    try { prev.stop(); } catch (e) { console.error('[LEDVisibility] ' + key + ' stop failed:', e); }
+                }
+                const reg = { tab: tab, start: start, stop: stop, key: key, running: false };
+                regs.set(key, reg);
+                evaluate(reg);
+                return function() {
+                    if (regs.get(key) !== reg) return;
+                    regs.delete(key);
+                    if (reg.running) { reg.running = false; stop(); }
+                };
+            }
+            function refresh() {
+                regs.forEach(evaluate);
+                if (window.LEDStreams) window.LEDStreams.refresh();
+            }
+
+            document.addEventListener('visibilitychange', refresh);
+            document.addEventListener('ledmatrix:tab-changed', function(e) {
+                lastTab = (e.detail && e.detail.tab) || lastTab;
+                refresh();
+            });
+
+            return { activeTab: activeTab, isActive: isActive, onActive: onActive, refresh: refresh };
+        })();
+
+        // ===== Live SSE streams — the single owner =====
+        // /stream/stats feeds the header stats and connection badge on every
+        // tab, so it stays open while the page is visible. /stream/display
+        // pushes base64 PNG frames and is only opened while a preview is on
+        // screen: the Overview live preview, or the floating preview when open.
+        // Both close while the page is hidden. The server's broadcaster ends its
+        // generator thread once the last subscriber leaves, so closing here
+        // saves Pi CPU, not only bandwidth.
+        //
+        // window.statsSource / window.displaySource remain public. An
+        // EventSource can't be reopened, so each reopen creates a new one;
+        // listeners other code attached with addEventListener (e.g. the Tools
+        // power panel) are recorded and re-attached to the replacement.
+        window.LEDStreams = (function() {
+            const CONFIG = {
+                stats: {
+                    url: '/api/v3/stream/stats',
+                    prop: 'statsSource',
+                    onmessage: function(data) { updateSystemStats(data); },
+                    wire: function(src) {
+                        src.onopen = window._statsOpenHandler;
+                        src.onerror = window._statsErrorHandler;
+                    }
+                },
+                display: {
+                    url: '/api/v3/stream/display',
+                    prop: 'displaySource',
+                    onmessage: function(data) { updateDisplayPreview(data); },
+                    wire: function(src) { src.onerror = window._displayErrorHandler; }
+                }
+            };
+            const open = { stats: null, display: null };
+            const external = { stats: [], display: [] };
+
+            function openStream(name) {
+                if (open[name]) return;
+                const cfg = CONFIG[name];
+                const src = new EventSource(cfg.url);
+                const add = src.addEventListener.bind(src);
+                const remove = src.removeEventListener.bind(src);
+                src.addEventListener = function(type, listener, options) {
+                    external[name].push([type, listener, options]);
+                    add(type, listener, options);
+                };
+                src.removeEventListener = function(type, listener, options) {
+                    external[name] = external[name].filter(function(l) {
+                        return !(l[0] === type && l[1] === listener);
+                    });
+                    remove(type, listener, options);
+                };
+                external[name].forEach(function(l) { add(l[0], l[1], l[2]); });
+                src.onmessage = function(event) {
+                    let data;
+                    try { data = JSON.parse(event.data); } catch { return; }
+                    cfg.onmessage(data);
+                };
+                cfg.wire(src);
+                open[name] = src;
+                window[cfg.prop] = src;
+            }
+
+            // The closed instance stays on window so late `addEventListener`
+            // calls are still recorded and replayed on the next open.
+            function closeStream(name) {
+                if (!open[name]) return;
+                open[name].close();
+                open[name] = null;
+            }
+
+            function previewOnScreen() {
+                if (window.LEDVisibility.activeTab() === 'overview') return true;
+                const panel = document.getElementById('floating-preview');
+                return !!(panel && panel.style.display === 'block');
+            }
+
+            function refresh() {
+                if (document.hidden) {
+                    // Also covers a page first loaded in a background tab.
+                    closeStream('stats');
+                    closeStream('display');
+                    _setConnectionStatus(false, false, true);
+                    return;
+                }
+                if (!open.stats) {
+                    _statsErrorCount = 0;
+                    openStream('stats');
+                }
+                if (previewOnScreen()) openStream('display');
+                else closeStream('display');
+            }
+
+            function reconnect() {
+                closeStream('stats');
+                closeStream('display');
+                refresh();
+            }
+
+            return { refresh: refresh, reconnect: reconnect, isOpen: function(name) { return !!open[name]; } };
+        })();
+
+        // Public helper (previously duplicated in app.js).
+        window.reconnectSSE = function() { window.LEDStreams.reconnect(); };
+
+        // Header stats start immediately; the display stream opens once the
+        // active tab is known (Alpine init dispatches ledmatrix:tab-changed).
+        window.LEDStreams.refresh();
+        document.addEventListener('DOMContentLoaded', function() { window.LEDStreams.refresh(); });
 
         // Reset any time the currently-active warning clears, so a future
         // (new) occurrence shows the banner again even if this one was dismissed.
@@ -323,6 +479,10 @@
                         if (typeof window.updateFloatingPreviewVisibility === 'function') {
                             window.updateFloatingPreviewVisibility(newTab);
                         }
+                        // Pause/resume per-tab timers and SSE (LEDVisibility)
+                        document.dispatchEvent(new CustomEvent('ledmatrix:tab-changed', {
+                            detail: { tab: newTab, previous: oldTab }
+                        }));
                         // Trigger content load when tab changes
                         this.$nextTick(() => {
                             this.loadTabContent(newTab);
@@ -335,6 +495,9 @@
                         if (typeof window.updateNavAriaCurrent === 'function') {
                             window.updateNavAriaCurrent(this.activeTab);
                         }
+                        document.dispatchEvent(new CustomEvent('ledmatrix:tab-changed', {
+                            detail: { tab: this.activeTab, previous: null }
+                        }));
                     });
 
                     // Listen for plugin updates from pluginManager
@@ -1878,18 +2041,21 @@
             });
         };
         
-        // showNotification is provided by notification.js widget
-        // This fallback is only used if the widget hasn't loaded yet
+        // showNotification is implemented by the notification.js widget.
+        // Until it loads, this fallback queues messages; the widget shows the
+        // queue as soon as it registers (and then replaces this function).
         if (typeof window.showNotification !== 'function') {
             window.showNotification = function(message, type = 'info') {
-                debugLog(`[${type.toUpperCase()}]`, message);
-                const notification = document.createElement('div');
-                notification.className = `fixed top-4 right-4 px-6 py-3 rounded-lg shadow-lg z-50 ${
-                    type === 'success' ? 'bg-green-500' : type === 'error' ? 'bg-red-500' : 'bg-blue-500'
-                } text-white`;
-                notification.textContent = message;
-                document.body.appendChild(notification);
-                setTimeout(() => { notification.style.opacity = '0'; setTimeout(() => notification.remove(), 500); }, 3000);
+                const registry = window.LEDMatrixWidgets;
+                const widget = registry && typeof registry.get === 'function' ? registry.get('notification') : null;
+                if (widget && typeof widget.show === 'function') {
+                    return widget.show(message, typeof type === 'string' ? { type: type } : (type || {}));
+                }
+                if (!Array.isArray(window.__pendingNotifications)) {
+                    window.__pendingNotifications = [];
+                }
+                window.__pendingNotifications.push([message, type]);
+                debugLog(`[${String((type && type.type) || type).toUpperCase()}]`, message);
             };
         }
 
diff --git a/web_interface/static/v3/js/config/diff_viewer.js b/web_interface/static/v3/js/config/diff_viewer.js
index 9a97cb6c..baa0eee4 100644
--- a/web_interface/static/v3/js/config/diff_viewer.js
+++ b/web_interface/static/v3/js/config/diff_viewer.js
@@ -211,28 +211,28 @@ const ConfigDiffViewer = {
             modalContainer.className = 'fixed inset-0 z-50 overflow-y-auto';
             modalContainer.innerHTML = `
                 <div class="flex items-center justify-center min-h-screen px-4 pt-4 pb-20 text-center sm:block sm:p-0">
-                    <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity" onclick="this.closest('#config-diff-modal-container').remove(); window.__configDiffResolve(false);"></div>
-                    
-                    <div class="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-4xl sm:w-full">
+                    <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity" data-diff-backdrop aria-hidden="true"></div>
+
+                    <div id="config-diff-modal-panel" class="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-4xl sm:w-full" style="position:relative;">
                         <div class="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
                             <div class="sm:flex sm:items-start">
-                                <div class="mx-auto flex-shrink-0 flex items-center justify-center h-12 w-12 rounded-full bg-blue-100 sm:mx-0 sm:h-10 sm:w-10">
+                                <div class="mx-auto flex-shrink-0 flex items-center justify-center h-12 w-12 rounded-full bg-blue-100 sm:mx-0 sm:h-10 sm:w-10" aria-hidden="true">
                                     <i class="fas fa-code-branch text-blue-600"></i>
                                 </div>
                                 <div class="mt-3 text-center sm:mt-0 sm:ml-4 sm:text-left flex-1">
-                                    <h3 class="text-lg leading-6 font-medium text-gray-900">Review Configuration Changes</h3>
-                                    <div class="mt-4 max-h-96 overflow-y-auto">
+                                    <h3 id="config-diff-modal-title" class="text-lg leading-6 font-medium text-gray-900">Review Configuration Changes</h3>
+                                    <div class="mt-4 max-h-96 overflow-y-auto" tabindex="0" role="region" aria-label="Changes to save">
                                         ${this.formatDiff(differences)}
                                     </div>
                                 </div>
                             </div>
                         </div>
                         <div class="bg-gray-50 px-4 py-3 sm:px-6 sm:flex sm:flex-row-reverse">
-                            <button id="config-diff-confirm-btn" 
+                            <button type="button" id="config-diff-confirm-btn"
                                     class="w-full inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-blue-600 text-base font-medium text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 sm:ml-3 sm:w-auto sm:text-sm">
-                                <i class="fas fa-check mr-2"></i>Save Changes
+                                <i class="fas fa-check mr-2" aria-hidden="true"></i>Save Changes
                             </button>
-                            <button id="config-diff-cancel-btn" 
+                            <button type="button" id="config-diff-cancel-btn"
                                     class="mt-3 w-full inline-flex justify-center rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-base font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 sm:mt-0 sm:ml-3 sm:w-auto sm:text-sm">
                                 Cancel
                             </button>
@@ -240,27 +240,41 @@ const ConfigDiffViewer = {
                     </div>
                 </div>
             `;
-            
+
             document.body.appendChild(modalContainer);
-            
-            // Store resolve function globally (hack for onclick handlers)
-            window.__configDiffResolve = resolve;
-            
+
+            let release = null;
+            let settled = false;
+            // Single close path: remove the modal, release the focus trap
+            // (returning focus to where the user was) and settle the promise.
+            function finish(result) {
+                if (settled) return;
+                settled = true;
+                modalContainer.remove();
+                if (window.__configDiffResolve === finish) window.__configDiffResolve = undefined;
+                if (release) release();
+                resolve(result);
+            }
+
+            // Kept for backwards compatibility with code that calls it directly.
+            window.__configDiffResolve = finish;
+
             // Attach event listeners
             const confirmBtn = modalContainer.querySelector('#config-diff-confirm-btn');
             const cancelBtn = modalContainer.querySelector('#config-diff-cancel-btn');
-            
-            confirmBtn.addEventListener('click', () => {
-                modalContainer.remove();
-                delete window.__configDiffResolve;
-                resolve(true);
-            });
-            
-            cancelBtn.addEventListener('click', () => {
-                modalContainer.remove();
-                delete window.__configDiffResolve;
-                resolve(false);
-            });
+            const backdrop = modalContainer.querySelector('[data-diff-backdrop]');
+
+            confirmBtn.addEventListener('click', () => finish(true));
+            cancelBtn.addEventListener('click', () => finish(false));
+            if (backdrop) backdrop.addEventListener('click', () => finish(false));
+
+            if (window.LEDDialog) {
+                release = window.LEDDialog.trap(modalContainer.querySelector('#config-diff-modal-panel'), {
+                    labelledBy: 'config-diff-modal-title',
+                    initialFocus: confirmBtn,
+                    onEscape: () => finish(false)
+                });
+            }
         });
     },
     
diff --git a/web_interface/static/v3/js/settings-search.js b/web_interface/static/v3/js/settings-search.js
index 7619c2a0..42cd4b33 100644
--- a/web_interface/static/v3/js/settings-search.js
+++ b/web_interface/static/v3/js/settings-search.js
@@ -134,9 +134,7 @@
 
     function openResults() {
         resultsBox.classList.remove('hidden');
-        // .hidden has no effect without a matching CSS rule (this app's stylesheet
-        // is a hand-picked utility subset, not full Tailwind) - force it directly,
-        // same as the revealNode/collapseNode fallback below.
+        // Clear any inline display left by closeResults(); the class does the rest.
         resultsBox.style.display = '';
         if (input) input.setAttribute('aria-expanded', 'true');
     }
diff --git a/web_interface/static/v3/js/utils/dialog.js b/web_interface/static/v3/js/utils/dialog.js
new file mode 100644
index 00000000..560b6d6b
--- /dev/null
+++ b/web_interface/static/v3/js/utils/dialog.js
@@ -0,0 +1,139 @@
+/**
+ * Shared modal-dialog accessibility helper.
+ *
+ * The UI has several modal implementations (inline markup toggled with
+ * style.display, markup injected and removed, the `hidden` class). This helper
+ * deliberately does not show or hide anything — each caller keeps its own
+ * visibility logic — it only supplies what every modal was missing:
+ *
+ *   - role="dialog", aria-modal="true" and aria-labelledby on the panel
+ *   - initial focus inside the panel
+ *   - Tab / Shift+Tab kept inside the panel while it is open
+ *   - Escape routed to the caller's close function
+ *   - focus returned to whatever was focused before the dialog opened
+ *
+ * Usage:
+ *   const release = window.LEDDialog.trap(panelEl, {
+ *       labelledBy: 'my-modal-title',   // id of the visible heading (optional)
+ *       label: 'Plugin files',          // aria-label when there is no heading
+ *       initialFocus: inputEl,          // element or selector (optional)
+ *       onEscape: closeMyModal          // omit to ignore Escape
+ *   });
+ *   // ...when the modal closes (from any path):
+ *   release();
+ *
+ * Nested dialogs stack: only the top-most trap handles Tab and Escape.
+ * release() is idempotent, and calling trap() again on the same panel
+ * releases the previous trap first.
+ */
+(function () {
+    'use strict';
+
+    const FOCUSABLE = [
+        'a[href]', 'area[href]', 'button:not([disabled])',
+        'input:not([disabled]):not([type="hidden"])', 'select:not([disabled])',
+        'textarea:not([disabled])', 'iframe', '[contenteditable="true"]',
+        '[tabindex]:not([tabindex="-1"])'
+    ].join(',');
+
+    const stack = [];
+
+    function visible(el) {
+        return !!(el.offsetWidth || el.offsetHeight || el.getClientRects().length);
+    }
+
+    function focusables(panel) {
+        return Array.prototype.filter.call(panel.querySelectorAll(FOCUSABLE), visible);
+    }
+
+    function onKeydown(e) {
+        const top = stack[stack.length - 1];
+        if (!top) return;
+        if (e.key === 'Escape' && top.onEscape) {
+            e.preventDefault();
+            e.stopPropagation();
+            top.onEscape(e);
+            return;
+        }
+        if (e.key !== 'Tab') return;
+        const items = focusables(top.panel);
+        if (items.length === 0) {
+            e.preventDefault();
+            top.panel.focus();
+            return;
+        }
+        const first = items[0];
+        const last = items[items.length - 1];
+        const active = document.activeElement;
+        if (!top.panel.contains(active)) {
+            e.preventDefault();
+            first.focus();
+        } else if (e.shiftKey && active === first) {
+            e.preventDefault();
+            last.focus();
+        } else if (!e.shiftKey && active === last) {
+            e.preventDefault();
+            first.focus();
+        }
+    }
+
+    function trap(panel, opts) {
+        if (!panel) return function () {};
+        opts = opts || {};
+
+        const existing = stack.find(function (t) { return t.panel === panel; });
+        if (existing) existing.release();
+
+        panel.setAttribute('role', opts.role || 'dialog');
+        panel.setAttribute('aria-modal', 'true');
+        if (opts.labelledBy) {
+            panel.setAttribute('aria-labelledby', opts.labelledBy);
+        } else if (opts.label) {
+            panel.setAttribute('aria-label', opts.label);
+        }
+        if (!panel.hasAttribute('tabindex')) panel.setAttribute('tabindex', '-1');
+
+        const entry = {
+            panel: panel,
+            onEscape: opts.onEscape || null,
+            returnTo: document.activeElement,
+            released: false,
+            release: null
+        };
+
+        entry.release = function () {
+            if (entry.released) return;
+            entry.released = true;
+            const wasTop = stack[stack.length - 1] === entry;
+            const i = stack.indexOf(entry);
+            if (i !== -1) stack.splice(i, 1);
+            if (stack.length === 0) document.removeEventListener('keydown', onKeydown, true);
+            // Releasing a dialog underneath another one must not pull focus
+            // out of the dialog the user is actually in.
+            if (!wasTop) return;
+            const target = entry.returnTo;
+            const active = stack[stack.length - 1];
+            if (active && !(target && active.panel.contains(target))) {
+                active.panel.focus();
+            } else if (target && typeof target.focus === 'function' && document.contains(target)) {
+                target.focus();
+            }
+        };
+
+        stack.push(entry);
+        if (stack.length === 1) document.addEventListener('keydown', onKeydown, true);
+
+        // Focus after the caller has made the panel visible.
+        requestAnimationFrame(function () {
+            if (entry.released) return;
+            let target = opts.initialFocus;
+            if (typeof target === 'string') target = panel.querySelector(target);
+            if (!target || !visible(target)) target = focusables(panel)[0] || panel;
+            target.focus();
+        });
+
+        return entry.release;
+    }
+
+    window.LEDDialog = { trap: trap };
+})();
diff --git a/web_interface/static/v3/js/utils/error_handler.js b/web_interface/static/v3/js/utils/error_handler.js
index f6afbe3d..c5d6dacc 100644
--- a/web_interface/static/v3/js/utils/error_handler.js
+++ b/web_interface/static/v3/js/utils/error_handler.js
@@ -7,95 +7,97 @@
 
 /**
  * Comprehensive error code to user-friendly message mapping.
+ * Used only when the server response carries no message of its own.
  */
 const ERROR_MESSAGES = {
     // Configuration errors
-    'CONFIG_SAVE_FAILED': 'Failed to save configuration',
-    'CONFIG_LOAD_FAILED': 'Failed to load configuration',
-    'CONFIG_VALIDATION_FAILED': 'Configuration validation failed',
-    'CONFIG_ROLLBACK_FAILED': 'Failed to rollback configuration',
-    
+    'CONFIG_SAVE_FAILED': "Couldn't save your settings. Check the values and try again",
+    'CONFIG_LOAD_FAILED': "Couldn't load your settings. Reload the page to try again",
+    'CONFIG_VALIDATION_FAILED': 'Some settings have invalid values. Fix the highlighted fields and save again',
+    'CONFIG_ROLLBACK_FAILED': "Couldn't restore the previous settings. Try again, or restore from Backup & Restore",
+
     // Plugin errors
-    'PLUGIN_NOT_FOUND': 'Plugin not found',
-    'PLUGIN_INSTALL_FAILED': 'Failed to install plugin',
-    'PLUGIN_UPDATE_FAILED': 'Failed to update plugin',
-    'PLUGIN_UNINSTALL_FAILED': 'Failed to uninstall plugin',
-    'PLUGIN_LOAD_FAILED': 'Failed to load plugin',
-    'PLUGIN_OPERATION_CONFLICT': 'Plugin operation conflict - another operation is in progress',
-    
+    'PLUGIN_NOT_FOUND': "That plugin isn't installed. Check the Plugin Manager",
+    'PLUGIN_INSTALL_FAILED': "Couldn't install the plugin. Check the Pi's internet connection and try again",
+    'PLUGIN_UPDATE_FAILED': "Couldn't update the plugin. Try again in a moment",
+    'PLUGIN_UNINSTALL_FAILED': "Couldn't uninstall the plugin. Try again in a moment",
+    'PLUGIN_LOAD_FAILED': "The plugin couldn't start. Check the Logs tab for details",
+    'PLUGIN_OPERATION_CONFLICT': 'Another plugin operation is still running. Wait for it to finish, then try again',
+
     // Validation errors
-    'VALIDATION_ERROR': 'Validation error',
-    'SCHEMA_VALIDATION_FAILED': 'Configuration schema validation failed',
-    'INVALID_INPUT': 'Invalid input provided',
-    
+    'VALIDATION_ERROR': 'Some values are invalid. Fix them and try again',
+    'SCHEMA_VALIDATION_FAILED': "Some settings don't match what the plugin expects. Fix them and save again",
+    'INVALID_INPUT': "That value isn't valid. Check it and try again",
+
     // Network errors
-    'NETWORK_ERROR': 'Network error occurred',
-    'API_ERROR': 'API request failed',
-    'TIMEOUT': 'Operation timed out',
-    
+    'NETWORK_ERROR': "Couldn't reach the LEDMatrix device. Check that it's on and connected, then try again",
+    'API_ERROR': 'The request failed. Try again in a moment',
+    'TIMEOUT': 'This took too long to respond. Try again in a moment',
+
     // Permission errors
-    'PERMISSION_DENIED': 'Permission denied',
-    'FILE_PERMISSION_ERROR': 'File permission error',
-    
+    'PERMISSION_DENIED': "LEDMatrix doesn't have permission to do that. See the troubleshooting guide",
+    'FILE_PERMISSION_ERROR': "LEDMatrix can't write a file it needs. See the troubleshooting guide",
+
     // System errors
-    'SYSTEM_ERROR': 'System error occurred',
-    'SERVICE_UNAVAILABLE': 'Service unavailable',
-    
+    'SYSTEM_ERROR': 'Something went wrong on the device. Check the Logs tab for details',
+    'SERVICE_UNAVAILABLE': 'The LEDMatrix service is not running. Restart it from the Overview tab',
+
     // Unknown errors
-    'UNKNOWN_ERROR': 'An unknown error occurred'
+    'UNKNOWN_ERROR': 'Something went wrong. Try again, and check the Logs tab if it keeps happening'
 };
 
 /**
  * Error code to troubleshooting documentation links.
  */
+const TROUBLESHOOTING_URL = 'https://github.com/ChuckBuilds/LEDMatrix/blob/main/docs/TROUBLESHOOTING.md';
 const ERROR_DOCS = {
-    'CONFIG_SAVE_FAILED': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#configuration-errors',
-    'CONFIG_VALIDATION_FAILED': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#validation-errors',
-    'PLUGIN_INSTALL_FAILED': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#plugin-installation',
-    'PLUGIN_OPERATION_CONFLICT': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#plugin-operations',
-    'PERMISSION_DENIED': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#permissions',
-    'FILE_PERMISSION_ERROR': 'https://github.com/your-repo/LEDMatrix/wiki/Troubleshooting#permissions'
+    'CONFIG_SAVE_FAILED': TROUBLESHOOTING_URL + '#4-check-configuration',
+    'CONFIG_VALIDATION_FAILED': TROUBLESHOOTING_URL + '#4-check-configuration',
+    'PLUGIN_INSTALL_FAILED': TROUBLESHOOTING_URL + '#plugin-issues',
+    'PLUGIN_OPERATION_CONFLICT': TROUBLESHOOTING_URL + '#plugin-issues',
+    'PERMISSION_DENIED': TROUBLESHOOTING_URL + '#permission-issues',
+    'FILE_PERMISSION_ERROR': TROUBLESHOOTING_URL + '#permission-issues'
 };
 
 /**
  * Format error message for display to user.
- * 
+ *
  * @param {Object} error - Error object from API response
  * @returns {string} Formatted error message
  */
 function formatError(error) {
     if (!error) {
-        return 'An unknown error occurred';
+        return ERROR_MESSAGES.UNKNOWN_ERROR;
     }
-    
+
     // If error is a string, return it
     if (typeof error === 'string') {
         return error;
     }
-    
+
     // If error has a message, use it
     if (error.message) {
         return error.message;
     }
-    
+
     // If error has error_code, format it
     if (error.error_code) {
-        const message = ERROR_MESSAGES[error.error_code] || error.message || 'An error occurred';
-        
+        const message = ERROR_MESSAGES[error.error_code] || error.message || ERROR_MESSAGES.UNKNOWN_ERROR;
+
         // Add details if available
         if (error.details) {
             return `${message}: ${error.details}`;
         }
-        
+
         return message;
     }
-    
-    return 'An error occurred';
+
+    return ERROR_MESSAGES.UNKNOWN_ERROR;
 }
 
 /**
  * Get suggested fixes for an error.
- * 
+ *
  * @param {Object} error - Error object from API response
  * @returns {Array<string>} Array of suggested fixes
  */
@@ -103,13 +105,13 @@ function getSuggestedFixes(error) {
     if (!error || !error.suggested_fixes) {
         return [];
     }
-    
+
     return error.suggested_fixes;
 }
 
 /**
  * Display error with suggestions in a rich UI.
- * 
+ *
  * @param {Object} error - Error object from API response
  * @param {string} context - Optional context about what was being done
  * @param {Object} options - Display options
@@ -121,19 +123,19 @@ function displayError(error, context = null, options = {}) {
     const suggestions = getSuggestedFixes(error);
     const errorCode = error?.error_code;
     const docLink = errorCode ? ERROR_DOCS[errorCode] : null;
-    
+
     // Build full message
     let fullMessage = message;
     if (context) {
         fullMessage = `${context}: ${message}`;
     }
-    
+
     if (suggestions.length > 0) {
         fullMessage += '\n\nSuggested fixes:\n' + suggestions.map(s => `• ${s}`).join('\n');
     }
-    
+
     // If showDetails is true, show a rich error modal
-    if (options.showDetails !== false && (suggestions.length > 0 || docLink || error.details)) {
+    if (options.showDetails !== false && (suggestions.length > 0 || docLink || error?.details)) {
         showErrorModal(error, context, message, suggestions, docLink);
     } else {
         // Simple notification
@@ -146,9 +148,12 @@ function displayError(error, context = null, options = {}) {
     }
 }
 
+// Release function for the open error modal's focus trap (see utils/dialog.js).
+let errorModalRelease = null;
+
 /**
  * Show a rich error modal with details, suggestions, and copy button.
- * 
+ *
  * @param {Object} error - Error object
  * @param {string} context - Context
  * @param {string} message - Formatted message
@@ -156,6 +161,9 @@ function displayError(error, context = null, options = {}) {
  * @param {string} docLink - Documentation link
  */
 function showErrorModal(error, context, message, suggestions, docLink) {
+    error = error || {};
+    suggestions = suggestions || [];
+
     // Create modal container if it doesn't exist
     let modalContainer = document.getElementById('error-modal-container');
     if (!modalContainer) {
@@ -165,7 +173,13 @@ function showErrorModal(error, context, message, suggestions, docLink) {
         modalContainer.style.display = 'none';
         document.body.appendChild(modalContainer);
     }
-    
+
+    // Re-opening while open: release the previous trap before replacing it.
+    if (errorModalRelease) {
+        errorModalRelease();
+        errorModalRelease = null;
+    }
+
     // Build modal content
     const contextText = context ? `<div class="text-sm text-gray-600 mb-2">${escapeHtml(context)}</div>` : '';
     const suggestionsHtml = suggestions.length > 0 ? `
@@ -176,15 +190,15 @@ function showErrorModal(error, context, message, suggestions, docLink) {
             </ul>
         </div>
     ` : '';
-    
+
     const docLinkHtml = docLink ? `
         <div class="mt-4">
-            <a href="${docLink}" target="_blank" class="text-blue-600 hover:text-blue-800 text-sm underline">
-                <i class="fas fa-book mr-1"></i>View troubleshooting guide
+            <a href="${escapeHtml(docLink)}" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 text-sm underline">
+                <i class="fas fa-book mr-1" aria-hidden="true"></i>View troubleshooting guide<span style="position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;"> (opens in a new tab)</span>
             </a>
         </div>
     ` : '';
-    
+
     const detailsHtml = error.details ? `
         <div class="mt-4">
             <details class="cursor-pointer">
@@ -193,26 +207,26 @@ function showErrorModal(error, context, message, suggestions, docLink) {
             </details>
         </div>
     ` : '';
-    
+
     const errorCodeHtml = error.error_code ? `
         <div class="mt-2 text-xs text-gray-500">
             Error code: <code class="bg-gray-100 px-1 py-0.5 rounded">${escapeHtml(error.error_code)}</code>
         </div>
     ` : '';
-    
+
     modalContainer.innerHTML = `
         <div class="flex items-center justify-center min-h-screen px-4 pt-4 pb-20 text-center sm:block sm:p-0">
-            <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity" onclick="window.errorHandler.closeErrorModal()"></div>
-            
-            <div class="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-lg sm:w-full">
+            <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity" aria-hidden="true" onclick="window.errorHandler.closeErrorModal()"></div>
+
+            <div id="error-modal-panel" class="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-lg sm:w-full" style="position:relative;">
                 <div class="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
                     <div class="sm:flex sm:items-start">
-                        <div class="mx-auto flex-shrink-0 flex items-center justify-center h-12 w-12 rounded-full bg-red-100 sm:mx-0 sm:h-10 sm:w-10">
+                        <div class="mx-auto flex-shrink-0 flex items-center justify-center h-12 w-12 rounded-full bg-red-100 sm:mx-0 sm:h-10 sm:w-10" aria-hidden="true">
                             <i class="fas fa-exclamation-triangle text-red-600"></i>
                         </div>
                         <div class="mt-3 text-center sm:mt-0 sm:ml-4 sm:text-left flex-1">
-                            <h3 class="text-lg leading-6 font-medium text-gray-900">Error</h3>
-                            <div class="mt-2">
+                            <h3 id="error-modal-title" class="text-lg leading-6 font-medium text-gray-900">Something went wrong</h3>
+                            <div class="mt-2" id="error-modal-description">
                                 ${contextText}
                                 <p class="text-sm text-gray-500">${escapeHtml(message)}</p>
                                 ${errorCodeHtml}
@@ -224,11 +238,11 @@ function showErrorModal(error, context, message, suggestions, docLink) {
                     </div>
                 </div>
                 <div class="bg-gray-50 px-4 py-3 sm:px-6 sm:flex sm:flex-row-reverse">
-                    <button id="error-modal-copy-btn" 
+                    <button type="button" id="error-modal-copy-btn"
                             class="w-full inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-blue-600 text-base font-medium text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 sm:ml-3 sm:w-auto sm:text-sm">
-                        <i class="fas fa-copy mr-2"></i>Copy Error Details
+                        <i class="fas fa-copy mr-2" aria-hidden="true"></i>Copy Error Details
                     </button>
-                    <button onclick="window.errorHandler.closeErrorModal()" 
+                    <button type="button" id="error-modal-close-btn" onclick="window.errorHandler.closeErrorModal()"
                             class="mt-3 w-full inline-flex justify-center rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-base font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 sm:mt-0 sm:ml-3 sm:w-auto sm:text-sm">
                         Close
                     </button>
@@ -236,7 +250,7 @@ function showErrorModal(error, context, message, suggestions, docLink) {
             </div>
         </div>
     `;
-    
+
     // Attach event listener to copy button
     const copyBtn = modalContainer.querySelector('#error-modal-copy-btn');
     if (copyBtn) {
@@ -244,8 +258,20 @@ function showErrorModal(error, context, message, suggestions, docLink) {
             copyErrorDetails(error);
         });
     }
-    
+
     modalContainer.style.display = 'block';
+
+    const panel = modalContainer.querySelector('#error-modal-panel');
+    if (panel) {
+        panel.setAttribute('aria-describedby', 'error-modal-description');
+        if (window.LEDDialog) {
+            errorModalRelease = window.LEDDialog.trap(panel, {
+                labelledBy: 'error-modal-title',
+                initialFocus: '#error-modal-close-btn',
+                onEscape: closeErrorModal
+            });
+        }
+    }
 }
 
 /**
@@ -256,6 +282,11 @@ function closeErrorModal() {
     if (modalContainer) {
         modalContainer.style.display = 'none';
     }
+    if (errorModalRelease) {
+        const release = errorModalRelease;
+        errorModalRelease = null;
+        release();
+    }
 }
 
 /**
@@ -277,27 +308,35 @@ function escapeHtml(text) {
 
 /**
  * Copy error details to clipboard.
- * 
+ *
  * @param {Object} error - Error object from API response
  */
 function copyErrorDetails(error) {
     const errorText = JSON.stringify(error, null, 2);
-    
+    function copyFailed(err) {
+        console.error('Failed to copy error details:', err);
+        if (typeof showNotification === 'function') {
+            showNotification("Couldn't copy to the clipboard. Open Technical details and copy the text by hand.", 'warning');
+        }
+    }
+
     if (navigator.clipboard && navigator.clipboard.writeText) {
         navigator.clipboard.writeText(errorText).then(() => {
             if (typeof showNotification === 'function') {
                 showNotification('Error details copied to clipboard', 'success');
             }
-        }).catch(err => {
-            console.error('Failed to copy error details:', err);
-        });
+        }).catch(copyFailed);
     } else {
         // Fallback for older browsers
         const textArea = document.createElement('textarea');
         textArea.value = errorText;
         textArea.style.position = 'fixed';
         textArea.style.opacity = '0';
-        document.body.appendChild(textArea);
+        // Keep focus inside the open dialog while copying.
+        const panel = document.getElementById('error-modal-panel');
+        const host = panel && panel.offsetParent !== null ? panel : document.body;
+        const returnFocus = document.activeElement;
+        host.appendChild(textArea);
         textArea.select();
         try {
             document.execCommand('copy');
@@ -305,9 +344,10 @@ function copyErrorDetails(error) {
                 showNotification('Error details copied to clipboard', 'success');
             }
         } catch (err) {
-            console.error('Failed to copy error details:', err);
+            copyFailed(err);
         }
-        document.body.removeChild(textArea);
+        host.removeChild(textArea);
+        if (returnFocus && typeof returnFocus.focus === 'function') returnFocus.focus();
     }
 }
 
@@ -336,4 +376,3 @@ if (typeof module !== 'undefined' && module.exports) {
         ERROR_DOCS
     };
 }
-
diff --git a/web_interface/static/v3/js/widgets/array-table.js b/web_interface/static/v3/js/widgets/array-table.js
index 1e9d1fc4..8fde00ae 100644
--- a/web_interface/static/v3/js/widgets/array-table.js
+++ b/web_interface/static/v3/js/widgets/array-table.js
@@ -415,7 +415,8 @@
         removeBtn.type      = 'button';
         removeBtn.className = 'text-red-600 hover:text-red-800 px-2 py-1';
         removeBtn.onclick   = function() { window.removeArrayTableRow(this); };
-        removeBtn.innerHTML = '<i class="fas fa-trash"></i>';
+        removeBtn.setAttribute('aria-label', 'Remove row');
+        removeBtn.innerHTML = '<i class="fas fa-trash" aria-hidden="true"></i>';
         actionsCell.appendChild(removeBtn);
 
         if (hasAdvanced) {
@@ -424,7 +425,8 @@
             editBtn.className = 'text-blue-500 hover:text-blue-700 px-2 py-1 ml-1';
             editBtn.title     = 'Edit advanced properties (layout, style…)';
             editBtn.onclick   = function() { window.openArrayTableRowEditor(this); };
-            editBtn.innerHTML = '<i class="fas fa-sliders-h"></i>';
+            editBtn.setAttribute('aria-label', 'Edit advanced properties');
+            editBtn.innerHTML = '<i class="fas fa-sliders-h" aria-hidden="true"></i>';
             actionsCell.appendChild(editBtn);
         }
 
@@ -446,9 +448,8 @@
         if (!advancedCell) return;
 
         const schema = JSON.parse(advancedCell.dataset.propSchema || '{}');
-        // Close any existing modal
-        const existing = document.getElementById('array-row-editor-modal');
-        if (existing) existing.remove();
+        // Close any existing modal (also releases its focus trap)
+        window.closeArrayTableRowEditor();
 
         const overlay = document.createElement('div');
         overlay.id        = 'array-row-editor-modal';
@@ -463,9 +464,10 @@
         // Header
         safeSetHTML(dialog, `
             <div class="flex items-center justify-between px-5 py-4 border-b border-gray-200">
-                <h3 class="text-base font-semibold text-gray-900">Advanced Properties</h3>
+                <h3 id="array-row-editor-title" class="text-base font-semibold text-gray-900">Advanced Properties</h3>
                 <button type="button" onclick="window.closeArrayTableRowEditor()"
-                        class="text-gray-400 hover:text-gray-600"><i class="fas fa-times"></i></button>
+                        aria-label="Close advanced properties"
+                        class="text-gray-400 hover:text-gray-600"><i class="fas fa-times" aria-hidden="true"></i></button>
             </div>`);
 
         const body = document.createElement('div');
@@ -558,11 +560,27 @@
         dialog.appendChild(footer);
         overlay.appendChild(dialog);
         document.body.appendChild(overlay);
+
+        if (window.LEDDialog) {
+            rowEditorRelease = window.LEDDialog.trap(dialog, {
+                labelledBy: 'array-row-editor-title',
+                initialFocus: '[data-modal-prop]',
+                onEscape: window.closeArrayTableRowEditor
+            });
+        }
     };
 
+    // Focus-trap release for the open row editor (see utils/dialog.js).
+    let rowEditorRelease = null;
+
     window.closeArrayTableRowEditor = function() {
         const modal = document.getElementById('array-row-editor-modal');
         if (modal) modal.remove();
+        if (rowEditorRelease) {
+            const release = rowEditorRelease;
+            rowEditorRelease = null;
+            release();
+        }
     };
 
     /**
diff --git a/web_interface/static/v3/js/widgets/color-picker.js b/web_interface/static/v3/js/widgets/color-picker.js
index 1f3daceb..16bfd6a0 100644
--- a/web_interface/static/v3/js/widgets/color-picker.js
+++ b/web_interface/static/v3/js/widgets/color-picker.js
@@ -107,6 +107,8 @@
             html += `
                 <input type="color"
                        id="${fieldId}_color"
+                       title="Choose color"
+                       aria-label="Choose color"
                        value="${currentValue}"
                        ${disabled ? 'disabled' : ''}
                        onchange="window.LEDMatrixWidgets.getHandlers('color-picker').onColorChange('${fieldId}')"
@@ -122,6 +124,7 @@
                                id="${fieldId}_hex"
                                value="${currentValue.substring(1)}"
                                maxlength="6"
+                               aria-label="Hex color code"
                                ${disabled ? 'disabled' : ''}
                                onchange="window.LEDMatrixWidgets.getHandlers('color-picker').onHexChange('${fieldId}')"
                                oninput="window.LEDMatrixWidgets.getHandlers('color-picker').onHexInput('${fieldId}')"
@@ -161,7 +164,8 @@
                                     onclick="window.LEDMatrixWidgets.getHandlers('color-picker').onPresetClick('${fieldId}', this.dataset.color)"
                                     class="w-6 h-6 rounded border border-gray-300 hover:scale-110 transition-transform ${disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer'}"
                                     style="background-color: ${escapeHtml(normalized)};"
-                                    title="${escapeHtml(normalized)}">
+                                    title="${escapeHtml(normalized)}"
+                                    aria-label="Use color ${escapeHtml(normalized)}">
                             </button>
                         `;
                     }
diff --git a/web_interface/static/v3/js/widgets/date-picker.js b/web_interface/static/v3/js/widgets/date-picker.js
index cc10e56a..44bca5f1 100644
--- a/web_interface/static/v3/js/widgets/date-picker.js
+++ b/web_interface/static/v3/js/widgets/date-picker.js
@@ -85,7 +85,7 @@
                            onchange="window.LEDMatrixWidgets.getHandlers('date-picker').onChange('${fieldId}')"
                            class="form-input w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500 ${disabled ? 'bg-gray-100 cursor-not-allowed' : 'bg-white'} text-black pr-10">
                     <div class="absolute inset-y-0 right-0 flex items-center pr-3 pointer-events-none">
-                        <i class="fas fa-calendar-alt text-gray-400"></i>
+                        <i class="fas fa-calendar-alt text-gray-400" aria-hidden="true"></i>
                     </div>
                 </div>
             `;
@@ -96,8 +96,8 @@
                             id="${fieldId}_clear"
                             onclick="window.LEDMatrixWidgets.getHandlers('date-picker').onClear('${fieldId}')"
                             class="ml-2 inline-flex items-center px-2 py-2 text-gray-400 hover:text-gray-600 ${currentValue ? '' : 'hidden'}"
-                            title="Clear">
-                        <i class="fas fa-times"></i>
+                            title="Clear" aria-label="Clear date">
+                        <i class="fas fa-times" aria-hidden="true"></i>
                     </button>
                 `;
             }
diff --git a/web_interface/static/v3/js/widgets/file-upload-single.js b/web_interface/static/v3/js/widgets/file-upload-single.js
index 52255d0d..ff4e70c8 100644
--- a/web_interface/static/v3/js/widgets/file-upload-single.js
+++ b/web_interface/static/v3/js/widgets/file-upload-single.js
@@ -102,8 +102,8 @@
                      </div>`;
             html += `<button type="button"
                              onclick="window.LEDMatrixWidgets.getHandlers('file-upload-single').onClear('${fieldId}')"
-                             class="flex-shrink-0 text-red-400 hover:text-red-600 p-1" title="Remove image">
-                         <i class="fas fa-times"></i>
+                             class="flex-shrink-0 text-red-400 hover:text-red-600 p-1" title="Remove image" aria-label="Remove image">
+                         <i class="fas fa-times" aria-hidden="true"></i>
                      </button>`;
             html += '</div>';
 
diff --git a/web_interface/static/v3/js/widgets/file-upload.js b/web_interface/static/v3/js/widgets/file-upload.js
index 8a2ed11f..fd4093cd 100644
--- a/web_interface/static/v3/js/widgets/file-upload.js
+++ b/web_interface/static/v3/js/widgets/file-upload.js
@@ -840,7 +840,7 @@
                 <!-- Schedule Mode -->
                 <div id="schedule_options_${sanitizedId}" class="space-y-4" style="display: ${schedule.enabled ? 'block' : 'none'};">
                     <div>
-                        <label class="block text-sm font-medium text-gray-700 mb-2">Schedule Type</label>
+                        <label for="schedule_mode_${sanitizedId}" class="block text-sm font-medium text-gray-700 mb-2">Schedule Type</label>
                         <select id="schedule_mode_${sanitizedId}"
                                 data-field-id="${escapeHtml(fieldId)}"
                                 data-image-id="${sanitizedId}"
@@ -855,8 +855,8 @@
                     <!-- Time Range Mode -->
                     <div id="time_range_${sanitizedId}" class="grid grid-cols-2 gap-4" style="display: ${schedule.mode === 'time_range' ? 'grid' : 'none'};">
                         <div>
-                            <label class="block text-xs font-medium text-gray-700 mb-1">Start Time</label>
-                            <input type="time" 
+                            <label for="schedule_start_${sanitizedId}" class="block text-xs font-medium text-gray-700 mb-1">Start Time</label>
+                            <input type="time"
                                    id="schedule_start_${sanitizedId}"
                                    data-field-id="${escapeHtml(fieldId)}"
                                    data-image-id="${sanitizedId}"
@@ -865,8 +865,8 @@
                                    class="block w-full px-2 py-1 text-sm border border-gray-300 rounded-md">
                         </div>
                         <div>
-                            <label class="block text-xs font-medium text-gray-700 mb-1">End Time</label>
-                            <input type="time" 
+                            <label for="schedule_end_${sanitizedId}" class="block text-xs font-medium text-gray-700 mb-1">End Time</label>
+                            <input type="time"
                                    id="schedule_end_${sanitizedId}"
                                    data-field-id="${escapeHtml(fieldId)}"
                                    data-image-id="${sanitizedId}"
@@ -900,6 +900,7 @@
                                     <div class="grid grid-cols-2 gap-2 ml-5" id="day_times_${day}_${sanitizedId}" style="display: ${dayConfig.enabled ? 'grid' : 'none'};">
                                         <input type="time"
                                                id="day_${day}_start_${sanitizedId}"
+                                               aria-label="${day} start time"
                                                data-field-id="${escapeHtml(fieldId)}"
                                                data-image-id="${sanitizedId}"
                                                data-image-idx="${imageIdx}"
@@ -909,6 +910,7 @@
                                                ${!dayConfig.enabled ? 'disabled' : ''}>
                                         <input type="time"
                                                id="day_${day}_end_${sanitizedId}"
+                                               aria-label="${day} end time"
                                                data-field-id="${escapeHtml(fieldId)}"
                                                data-image-id="${sanitizedId}"
                                                data-image-idx="${imageIdx}"
diff --git a/web_interface/static/v3/js/widgets/json-file-manager.js b/web_interface/static/v3/js/widgets/json-file-manager.js
index 06ce1188..d36a727d 100644
--- a/web_interface/static/v3/js/widgets/json-file-manager.js
+++ b/web_interface/static/v3/js/widgets/json-file-manager.js
@@ -57,6 +57,8 @@
             this._editFile   = null;
             this._deleteFile = null;
             this._keyHandler = this._onKey.bind(this);
+            // Focus-trap release functions for open modals (utils/dialog.js)
+            this._releases   = new Map();
 
             this._inject();
             this._bind();
@@ -67,9 +69,30 @@
 
         _destroy() {
             document.removeEventListener('keydown', this._keyHandler);
+            for (const key of Array.from(this._releases.keys())) this._release(key);
             this.el._jfmInstance = null;
         }
 
+        // Open a modal's focus trap. Escape is routed here, so _onKey no
+        // longer handles it.
+        _trap(key, modal, titleId, initialFocus, onClose) {
+            if (!modal || !window.LEDDialog) return;
+            const box = modal.querySelector('.jfm-modal-box');
+            this._releases.set(key, window.LEDDialog.trap(box, {
+                labelledBy: titleId,
+                initialFocus: initialFocus || null,
+                onEscape: onClose
+            }));
+        }
+
+        _release(key) {
+            const release = this._releases.get(key);
+            if (release) {
+                this._releases.delete(key);
+                release();
+            }
+        }
+
         // ── DOM Injection ────────────────────────────────────────────────────
 
         _inject() {
@@ -108,21 +131,22 @@
   </div>` : ''}
 
   <!-- ── Edit modal ─────────────────────────────────────── -->
-  <div class="jfm-modal" id="${u}-edit-modal" role="dialog" aria-modal="true" hidden>
+  <div class="jfm-modal" id="${u}-edit-modal" hidden>
     <div class="jfm-modal-box jfm-modal-wide">
       <div class="jfm-modal-head">
         <span id="${u}-edit-title" class="jfm-modal-title">Edit file</span>
         <div class="jfm-modal-tools">
           <button type="button" class="jfm-btn jfm-btn-ghost jfm-btn-sm" data-jfm="fmt">Format</button>
           <button type="button" class="jfm-btn jfm-btn-ghost jfm-btn-sm" data-jfm="validate">Validate</button>
-          <button type="button" class="jfm-close-btn" data-jfm="close-edit" aria-label="Close">&times;</button>
+          <button type="button" class="jfm-close-btn" data-jfm="close-edit" aria-label="Close editor">&times;</button>
         </div>
       </div>
-      <div id="${u}-edit-err" class="jfm-err-bar" hidden></div>
+      <div id="${u}-edit-err" class="jfm-err-bar" role="alert" hidden></div>
       <textarea id="${u}-editor" class="jfm-editor"
                 spellcheck="false" autocomplete="off"
                 autocorrect="off" autocapitalize="off"
-                aria-label="JSON editor"></textarea>
+                aria-label="JSON editor" aria-describedby="${u}-editor-hint"></textarea>
+      <span id="${u}-editor-hint" hidden>Tab inserts two spaces. Shift+Tab moves focus back to the toolbar. Ctrl+S saves.</span>
       <div class="jfm-modal-foot">
         <span id="${u}-charcount" class="jfm-stat"></span>
         <button type="button" class="jfm-btn jfm-btn-ghost" data-jfm="close-edit">Cancel</button>
@@ -133,10 +157,10 @@
 
   <!-- ── Delete modal ───────────────────────────────────── -->
   ${hasDelete ? `
-  <div class="jfm-modal" id="${u}-del-modal" role="dialog" aria-modal="true" hidden>
+  <div class="jfm-modal" id="${u}-del-modal" hidden>
     <div class="jfm-modal-box">
       <div class="jfm-modal-head">
-        <span class="jfm-modal-title">Delete file</span>
+        <span id="${u}-del-title" class="jfm-modal-title">Delete file</span>
         <button type="button" class="jfm-close-btn" data-jfm="close-del" aria-label="Close">&times;</button>
       </div>
       <div class="jfm-modal-body">
@@ -144,7 +168,7 @@
         <p class="jfm-muted">This permanently removes the file and its entry from the plugin configuration.</p>
       </div>
       <div class="jfm-modal-foot">
-        <button type="button" class="jfm-btn jfm-btn-ghost" data-jfm="close-del">Cancel</button>
+        <button type="button" class="jfm-btn jfm-btn-ghost" data-jfm="close-del" id="${u}-del-cancel">Cancel</button>
         <button type="button" class="jfm-btn jfm-btn-danger" data-jfm="confirm-del" id="${u}-del-btn">Delete</button>
       </div>
     </div>
@@ -152,10 +176,10 @@
 
   <!-- ── Create modal ───────────────────────────────────── -->
   ${hasCreate ? `
-  <div class="jfm-modal" id="${u}-create-modal" role="dialog" aria-modal="true" hidden>
+  <div class="jfm-modal" id="${u}-create-modal" hidden>
     <div class="jfm-modal-box">
       <div class="jfm-modal-head">
-        <span class="jfm-modal-title">Create new file</span>
+        <span id="${u}-create-title" class="jfm-modal-title">Create new file</span>
         <button type="button" class="jfm-close-btn" data-jfm="close-create" aria-label="Close">&times;</button>
       </div>
       <div class="jfm-modal-body">
@@ -189,93 +213,106 @@
         }
 
         _css(u) {
+            // Colors come from the app theme tokens (app.css :root / [data-theme="dark"])
+            // with the original light values as fallbacks for pages without app.css.
+            // Shades the tokens don't cover are local variables with a dark override.
             return `<style>
-#${u}{font-family:inherit;color:#111827;}
+#${u}{--jfm-border-strong:#d1d5db;--jfm-border-hover:#9ca3af;--jfm-subtle:#f3f4f6;--jfm-accent-soft:#93c5fd;--jfm-danger-border:#fecaca;--jfm-danger-text:#991b1b;--jfm-text-muted:#6b7280;}
+[data-theme="dark"] #${u}{--jfm-border-strong:#4b5563;--jfm-border-hover:#6b7280;--jfm-subtle:#374151;--jfm-accent-soft:#1e40af;--jfm-danger-border:#991b1b;--jfm-danger-text:#fecaca;--jfm-text-muted:#9ca3af;}
+#${u}{font-family:inherit;color:var(--color-text-primary,#111827);}
 #${u} *{box-sizing:border-box;}
 
 /* Header */
 #${u} .jfm-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.875rem;gap:.5rem;}
 #${u} .jfm-header-left{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;}
-#${u} .jfm-title{font-size:.9375rem;font-weight:600;color:#111827;}
-#${u} .jfm-dir{font-size:.75rem;color:#6b7280;background:#f3f4f6;padding:.125rem .375rem;border-radius:.25rem;font-family:monospace;}
+#${u} .jfm-title{font-size:.9375rem;font-weight:600;color:var(--color-text-primary,#111827);}
+#${u} .jfm-dir{font-size:.75rem;color:var(--jfm-text-muted);background:var(--jfm-subtle);padding:.125rem .375rem;border-radius:.25rem;font-family:monospace;}
 #${u} .jfm-header-right{display:flex;gap:.375rem;align-items:center;flex-shrink:0;}
 
 /* Buttons */
-#${u} .jfm-btn{display:inline-flex;align-items:center;gap:.25rem;padding:.4375rem .875rem;border-radius:.375rem;border:1px solid #d1d5db;background:#fff;color:#374151;font-size:.875rem;font-weight:500;cursor:pointer;transition:background .12s,border-color .12s,opacity .12s;line-height:1.25;}
-#${u} .jfm-btn:hover:not(:disabled){background:#f9fafb;border-color:#9ca3af;}
-#${u} .jfm-btn:focus-visible{outline:2px solid #3b82f6;outline-offset:1px;}
+#${u} .jfm-btn{display:inline-flex;align-items:center;gap:.25rem;padding:.4375rem .875rem;border-radius:.375rem;border:1px solid var(--jfm-border-strong);background:var(--color-surface,#fff);color:var(--color-text-secondary,#374151);font-size:.875rem;font-weight:500;cursor:pointer;transition:background .12s,border-color .12s,opacity .12s;line-height:1.25;}
+#${u} .jfm-btn:hover:not(:disabled){background:var(--color-background,#f9fafb);border-color:var(--jfm-border-hover);}
+#${u} .jfm-btn:focus-visible,#${u} .jfm-close-btn:focus-visible{outline:2px solid var(--color-primary,#3b82f6);outline-offset:1px;}
 #${u} .jfm-btn:disabled{opacity:.5;cursor:not-allowed;}
 #${u} .jfm-btn-sm{padding:.3125rem .625rem;font-size:.8125rem;}
-#${u} .jfm-btn-primary{background:#3b82f6;border-color:#3b82f6;color:#fff;}
-#${u} .jfm-btn-primary:hover:not(:disabled){background:#2563eb;border-color:#2563eb;}
-#${u} .jfm-btn-danger{background:#ef4444;border-color:#ef4444;color:#fff;}
-#${u} .jfm-btn-danger:hover:not(:disabled){background:#dc2626;border-color:#dc2626;}
-#${u} .jfm-btn-ghost{background:transparent;border-color:transparent;color:#6b7280;}
-#${u} .jfm-btn-ghost:hover:not(:disabled){background:#f3f4f6;color:#374151;}
-#${u} .jfm-close-btn{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:none;background:none;color:#9ca3af;font-size:1.25rem;cursor:pointer;border-radius:.25rem;padding:0;line-height:1;}
-#${u} .jfm-close-btn:hover{background:#f3f4f6;color:#374151;}
+#${u} .jfm-btn-primary{background:var(--color-primary,#3b82f6);border-color:var(--color-primary,#3b82f6);color:#fff;}
+#${u} .jfm-btn-primary:hover:not(:disabled){background:var(--color-primary-hover,#2563eb);border-color:var(--color-primary-hover,#2563eb);}
+#${u} .jfm-btn-danger{background:#dc2626;border-color:#dc2626;color:#fff;}
+#${u} .jfm-btn-danger:hover:not(:disabled){background:#b91c1c;border-color:#b91c1c;}
+#${u} .jfm-btn-ghost{background:transparent;border-color:transparent;color:var(--jfm-text-muted);}
+#${u} .jfm-btn-ghost:hover:not(:disabled){background:var(--jfm-subtle);color:var(--color-text-secondary,#374151);}
+#${u} .jfm-close-btn{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:none;background:none;color:var(--jfm-text-muted);font-size:1.25rem;cursor:pointer;border-radius:.25rem;padding:0;line-height:1;}
+#${u} .jfm-close-btn:hover{background:var(--jfm-subtle);color:var(--color-text-secondary,#374151);}
 
 /* File list */
 #${u} .jfm-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.625rem;margin-bottom:1rem;min-height:5rem;}
-#${u} .jfm-loading{grid-column:1/-1;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:2rem;color:#6b7280;font-size:.875rem;}
-#${u} .jfm-empty{grid-column:1/-1;text-align:center;padding:2.5rem 1rem;color:#9ca3af;}
+#${u} .jfm-loading{grid-column:1/-1;display:flex;align-items:center;justify-content:center;gap:.5rem;padding:2rem;color:var(--jfm-text-muted);font-size:.875rem;}
+#${u} .jfm-empty{grid-column:1/-1;text-align:center;padding:2.5rem 1rem;color:var(--jfm-text-muted);}
 #${u} .jfm-empty-icon{font-size:2.25rem;margin-bottom:.625rem;}
-#${u} .jfm-empty-title{font-weight:600;color:#374151;margin:0 0 .25rem;}
+#${u} .jfm-empty-title{font-weight:600;color:var(--color-text-secondary,#374151);margin:0 0 .25rem;}
 #${u} .jfm-empty-sub{font-size:.875rem;margin:0;}
 
 /* File cards */
-#${u} .jfm-card{border:1px solid #e5e7eb;border-radius:.5rem;padding:.875rem;background:#fff;display:flex;flex-direction:column;gap:.5rem;transition:border-color .15s,box-shadow .15s;}
-#${u} .jfm-card:hover{border-color:#93c5fd;box-shadow:0 2px 8px rgba(59,130,246,.1);}
+#${u} .jfm-card{border:1px solid var(--color-border,#e5e7eb);border-radius:.5rem;padding:.875rem;background:var(--color-surface,#fff);display:flex;flex-direction:column;gap:.5rem;transition:border-color .15s,box-shadow .15s;}
+#${u} .jfm-card:hover{border-color:var(--jfm-accent-soft);box-shadow:var(--shadow-md,0 2px 8px rgba(59,130,246,.1));}
 #${u} .jfm-card.jfm-off{opacity:.6;}
 #${u} .jfm-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:.5rem;}
-#${u} .jfm-card-name{font-weight:600;font-size:.9375rem;word-break:break-word;color:#111827;flex:1;}
-#${u} .jfm-card-meta{font-size:.75rem;color:#6b7280;display:flex;flex-direction:column;gap:.125rem;line-height:1.5;}
-#${u} .jfm-card-actions{display:flex;gap:.375rem;padding-top:.5rem;border-top:1px solid #f3f4f6;margin-top:.125rem;}
+#${u} .jfm-card-name{font-weight:600;font-size:.9375rem;word-break:break-word;color:var(--color-text-primary,#111827);flex:1;}
+#${u} .jfm-card-meta{font-size:.75rem;color:var(--jfm-text-muted);display:flex;flex-direction:column;gap:.125rem;line-height:1.5;}
+#${u} .jfm-card-actions{display:flex;gap:.375rem;padding-top:.5rem;border-top:1px solid var(--color-border-light,#f3f4f6);margin-top:.125rem;}
 #${u} .jfm-card-actions .jfm-btn{flex:1;justify-content:center;}
 #${u} .jfm-card-actions .jfm-del{flex:0 0 auto;}
 
 /* Toggle */
-#${u} .jfm-toggle{display:flex;align-items:center;gap:.3125rem;font-size:.75rem;color:#6b7280;white-space:nowrap;flex-shrink:0;}
+#${u} .jfm-toggle{display:flex;align-items:center;gap:.3125rem;font-size:.75rem;color:var(--jfm-text-muted);white-space:nowrap;flex-shrink:0;}
 #${u} .jfm-toggle input[type=checkbox]{width:.9375rem;height:.9375rem;cursor:pointer;accent-color:#22c55e;margin:0;}
 
 /* Upload zone */
 #${u} .jfm-upload-wrap{margin-top:.25rem;}
 #${u} input[type=file]#${u}-fileinput{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;}
-#${u} .jfm-dropzone{border:2px dashed #d1d5db;border-radius:.5rem;padding:1.25rem 1rem;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:#f9fafb;user-select:none;}
-#${u} .jfm-dropzone:hover,#${u} .jfm-dropzone:focus-visible,#${u} .jfm-dropzone.jfm-over{border-color:#3b82f6;background:#eff6ff;border-style:solid;outline:none;}
+#${u} .jfm-dropzone{border:2px dashed var(--jfm-border-strong);border-radius:.5rem;padding:1.25rem 1rem;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:var(--color-background,#f9fafb);user-select:none;}
+#${u} .jfm-dropzone:hover,#${u} .jfm-dropzone:focus-visible,#${u} .jfm-dropzone.jfm-over{border-color:var(--color-primary,#3b82f6);background:var(--color-info-bg,#eff6ff);border-style:solid;outline:none;}
 #${u} .jfm-drop-icon{font-size:1.75rem;display:block;margin-bottom:.375rem;}
-#${u} .jfm-drop-primary{font-size:.875rem;color:#374151;margin:0 0 .25rem;}
-#${u} .jfm-drop-hint{font-size:.75rem;color:#9ca3af;margin:0;}
+#${u} .jfm-drop-primary{font-size:.875rem;color:var(--color-text-secondary,#374151);margin:0 0 .25rem;}
+#${u} .jfm-drop-hint{font-size:.75rem;color:var(--jfm-text-muted);margin:0;}
 
 /* Modals */
 #${u} .jfm-modal{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:9999;display:flex;align-items:center;justify-content:center;padding:1rem;backdrop-filter:blur(1px);}
 #${u} .jfm-modal[hidden]{display:none;}
-#${u} .jfm-modal-box{background:#fff;border-radius:.5rem;box-shadow:0 20px 40px rgba(0,0,0,.15);display:flex;flex-direction:column;width:100%;max-width:440px;max-height:92vh;}
+#${u} .jfm-modal-box{background:var(--color-surface,#fff);color:var(--color-text-primary,#111827);border-radius:.5rem;box-shadow:0 20px 40px rgba(0,0,0,.15);display:flex;flex-direction:column;width:100%;max-width:440px;max-height:92vh;}
+#${u} .jfm-modal-box:focus{outline:none;}
 #${u} .jfm-modal-wide{max-width:880px;}
-#${u} .jfm-modal-head{display:flex;justify-content:space-between;align-items:center;padding:.875rem 1.125rem;border-bottom:1px solid #e5e7eb;flex-shrink:0;gap:.5rem;}
-#${u} .jfm-modal-title{font-weight:600;font-size:.9375rem;color:#111827;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
+#${u} .jfm-modal-head{display:flex;justify-content:space-between;align-items:center;padding:.875rem 1.125rem;border-bottom:1px solid var(--color-border,#e5e7eb);flex-shrink:0;gap:.5rem;}
+#${u} .jfm-modal-title{font-weight:600;font-size:.9375rem;color:var(--color-text-primary,#111827);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
 #${u} .jfm-modal-tools{display:flex;gap:.25rem;align-items:center;flex-shrink:0;}
 #${u} .jfm-modal-body{padding:1.125rem;overflow-y:auto;flex:1;}
-#${u} .jfm-modal-foot{display:flex;gap:.5rem;justify-content:flex-end;align-items:center;padding:.75rem 1.125rem;border-top:1px solid #e5e7eb;flex-shrink:0;background:#f9fafb;border-radius:0 0 .5rem .5rem;}
-#${u} .jfm-stat{margin-right:auto;font-size:.75rem;color:#9ca3af;font-variant-numeric:tabular-nums;}
+#${u} .jfm-modal-foot{display:flex;gap:.5rem;justify-content:flex-end;align-items:center;padding:.75rem 1.125rem;border-top:1px solid var(--color-border,#e5e7eb);flex-shrink:0;background:var(--color-background,#f9fafb);border-radius:0 0 .5rem .5rem;}
+#${u} .jfm-stat{margin-right:auto;font-size:.75rem;color:var(--jfm-text-muted);font-variant-numeric:tabular-nums;}
 
 /* JSON editor */
-#${u} .jfm-editor{display:block;width:100%;min-height:400px;height:58vh;max-height:64vh;resize:vertical;font-family:'Courier New',Consolas,ui-monospace,monospace;font-size:.8rem;line-height:1.55;padding:.75rem 1rem;border:none;border-radius:0;outline:none;white-space:pre;overflow:auto;color:#1e293b;background:#fafafa;tab-size:2;}
-#${u} .jfm-err-bar{background:#fef2f2;border-bottom:1px solid #fecaca;color:#991b1b;font-size:.8125rem;padding:.5rem 1.125rem;flex-shrink:0;line-height:1.4;}
+#${u} .jfm-editor{display:block;width:100%;min-height:400px;height:58vh;max-height:64vh;resize:vertical;font-family:'Courier New',Consolas,ui-monospace,monospace;font-size:.8rem;line-height:1.55;padding:.75rem 1rem;border:none;border-radius:0;outline:none;white-space:pre;overflow:auto;color:var(--color-text-primary,#1e293b);background:var(--color-background,#fafafa);tab-size:2;}
+#${u} .jfm-editor:focus-visible{box-shadow:inset 0 0 0 2px var(--color-primary,#3b82f6);}
+#${u} .jfm-err-bar{background:var(--color-error-bg,#fef2f2);border-bottom:1px solid var(--jfm-danger-border);color:var(--jfm-danger-text);font-size:.8125rem;padding:.5rem 1.125rem;flex-shrink:0;line-height:1.4;}
 #${u} .jfm-err-bar[hidden]{display:none;}
 
 /* Create form */
 #${u} .jfm-field{margin-bottom:.875rem;}
 #${u} .jfm-field:last-child{margin-bottom:0;}
-#${u} .jfm-field label{display:block;font-size:.875rem;font-weight:500;color:#374151;margin-bottom:.3125rem;}
-#${u} .jfm-field input{width:100%;padding:.4375rem .75rem;border:1px solid #d1d5db;border-radius:.375rem;font-size:.875rem;color:#111827;background:#fff;}
-#${u} .jfm-field input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.12);}
-#${u} .jfm-hint{display:block;font-size:.75rem;color:#9ca3af;margin-top:.25rem;}
-#${u} .jfm-muted{font-size:.875rem;color:#6b7280;margin-top:.375rem;}
+#${u} .jfm-field label{display:block;font-size:.875rem;font-weight:500;color:var(--color-text-secondary,#374151);margin-bottom:.3125rem;}
+#${u} .jfm-field input{width:100%;padding:.4375rem .75rem;border:1px solid var(--jfm-border-strong);border-radius:.375rem;font-size:.875rem;color:var(--color-text-primary,#111827);background:var(--color-surface,#fff);}
+#${u} .jfm-field input:focus{outline:none;border-color:var(--color-primary,#3b82f6);box-shadow:0 0 0 3px rgba(59,130,246,.25);}
+#${u} .jfm-hint{display:block;font-size:.75rem;color:var(--jfm-text-muted);margin-top:.25rem;}
+#${u} .jfm-muted{font-size:.875rem;color:var(--jfm-text-muted);margin-top:.375rem;}
 
 /* Spinner */
-#${u} .jfm-spin{display:inline-block;width:.9rem;height:.9rem;border:2px solid #e5e7eb;border-top-color:#3b82f6;border-radius:50%;animation:jfm-spin-${u} .6s linear infinite;vertical-align:middle;}
+#${u} .jfm-spin{display:inline-block;width:.9rem;height:.9rem;border:2px solid var(--color-border,#e5e7eb);border-top-color:var(--color-primary,#3b82f6);border-radius:50%;animation:jfm-spin-${u} .6s linear infinite;vertical-align:middle;}
 @keyframes jfm-spin-${u}{to{transform:rotate(360deg);}}
+
+@media (prefers-reduced-motion: reduce){
+#${u} .jfm-btn,#${u} .jfm-card,#${u} .jfm-dropzone{transition:none;}
+#${u} .jfm-spin{animation-duration:1.5s;}
+#${u} .jfm-modal{backdrop-filter:none;}
+}
 </style>`;
         }
 
@@ -319,7 +356,9 @@
             if (this._editorEl) {
                 this._editorEl.addEventListener('input', () => this._updateStat());
                 this._editorEl.addEventListener('keydown', e => {
-                    if (e.key === 'Tab') {
+                    // Plain Tab indents; Shift+Tab is left alone so keyboard
+                    // users can always move focus out of the editor.
+                    if (e.key === 'Tab' && !e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
                         e.preventDefault();
                         const s = this._editorEl.selectionStart;
                         const end = this._editorEl.selectionEnd;
@@ -336,15 +375,8 @@
         }
 
         _onKey(e) {
+            // Escape is handled by the dialog focus trap (see _trap).
             const editOpen   = this._editModal   && !this._editModal.hidden;
-            const delOpen    = this._delModal    && !this._delModal.hidden;
-            const createOpen = this._createModal && !this._createModal.hidden;
-
-            if (e.key === 'Escape') {
-                if (editOpen)   { this._closeEdit();   return; }
-                if (delOpen)    { this._closeDel();    return; }
-                if (createOpen) { this._closeCreate(); return; }
-            }
             if ((e.ctrlKey || e.metaKey) && e.key === 's' && editOpen) {
                 e.preventDefault();
                 this._doSave();
@@ -488,6 +520,7 @@
             this._editorEl.value = 'Loading…';
             this._updateStat();
             this._editModal.hidden = false;
+            this._trap('edit', this._editModal, `${this._uid}-edit-title`, this._editorEl, () => this._closeEdit());
 
             try {
                 const data = await this._api('get', { filename });
@@ -498,7 +531,7 @@
                 this._editorEl.setSelectionRange(0, 0);
                 this._editorEl.scrollTop = 0;
             } catch (err) {
-                this._showErr('Failed to load file: ' + err.message);
+                this._showErr(`Couldn't load this file (${err.message}). Close the editor and try again.`);
                 this._editorEl.value = '';
             }
         }
@@ -507,6 +540,7 @@
             if (this._editModal) this._editModal.hidden = true;
             this._editFile = null;
             this._clearErr();
+            this._release('edit');
         }
 
         _formatJson() {
@@ -562,12 +596,18 @@
             this._deleteFile = filename;
             const el = document.getElementById(`${this._uid}-del-name`);
             if (el) el.textContent = filename;
-            if (this._delModal) this._delModal.hidden = false;
+            if (this._delModal) {
+                this._delModal.hidden = false;
+                // Destructive dialog: start on Cancel.
+                this._trap('del', this._delModal, `${this._uid}-del-title`,
+                    document.getElementById(`${this._uid}-del-cancel`), () => this._closeDel());
+            }
         }
 
         _closeDel() {
             if (this._delModal) this._delModal.hidden = true;
             this._deleteFile = null;
+            this._release('del');
         }
 
         async _doDelete() {
@@ -597,11 +637,13 @@
             });
             this._createModal.hidden = false;
             const first = this.createFields[0];
-            if (first) document.getElementById(`${this._uid}-cf-${first.key}`)?.focus();
+            const firstInput = first ? document.getElementById(`${this._uid}-cf-${first.key}`) : null;
+            this._trap('create', this._createModal, `${this._uid}-create-title`, firstInput, () => this._closeCreate());
         }
 
         _closeCreate() {
             if (this._createModal) this._createModal.hidden = true;
+            this._release('create');
         }
 
         async _doCreate() {
diff --git a/web_interface/static/v3/js/widgets/notification.js b/web_interface/static/v3/js/widgets/notification.js
index 14805bb6..a854c766 100644
--- a/web_interface/static/v3/js/widgets/notification.js
+++ b/web_interface/static/v3/js/widgets/notification.js
@@ -2,7 +2,9 @@
  * LEDMatrix Notification Widget
  *
  * Global notification/toast system for displaying messages to users.
- * Consolidates all notification functionality into a single widget.
+ * This is the single implementation: the early fallbacks in app-shell.js,
+ * app.js and partials/fonts.html only queue messages until this widget has
+ * loaded (see window.__pendingNotifications) and then delegate to it.
  *
  * Usage:
  *   window.showNotification('Message here', 'success');
@@ -11,6 +13,16 @@
  *
  * Types: success, error, warning, info (default)
  *
+ * Accessibility:
+ *   - Toasts are announced through two persistent, visually hidden live
+ *     regions: errors use an assertive region (role="alert"), everything else
+ *     a polite one (role="status"). The visible toast is not itself a live
+ *     region, so each message is announced exactly once.
+ *   - Errors stay on screen for at least ERROR_MIN_DURATION and always have a
+ *     dismiss button.
+ *   - Auto-dismiss pauses while the pointer is over a toast or focus is in it.
+ *   - Slide animations are skipped under prefers-reduced-motion.
+ *
  * @module NotificationWidget
  */
 
@@ -26,35 +38,51 @@
     // Configuration
     const CONFIG = {
         containerId: 'notifications',
+        politeRegionId: 'notifications-live-polite',
+        assertiveRegionId: 'notifications-live-assertive',
         defaultDuration: 4000,
+        warningDuration: 6000,
+        errorMinDuration: 10000,
         fadeOutDuration: 300,
         maxNotifications: 5,
         position: 'top-right' // top-right, top-left, bottom-right, bottom-left
     };
 
-    // Type-specific styling
+    // Type-specific styling. `bg` class names are kept for anyone styling
+    // against them; `color` is applied inline so white text meets 4.5:1
+    // contrast even where the utility classes are missing or lighter.
     const TYPE_STYLES = {
         success: {
             bg: 'bg-green-500',
+            color: '#047857',
             icon: 'fa-check-circle',
             label: 'Success'
         },
         error: {
             bg: 'bg-red-500',
+            color: '#b91c1c',
             icon: 'fa-exclamation-circle',
             label: 'Error'
         },
         warning: {
             bg: 'bg-yellow-500',
+            color: '#b45309',
             icon: 'fa-exclamation-triangle',
             label: 'Warning'
         },
         info: {
             bg: 'bg-blue-500',
+            color: '#1d4ed8',
             icon: 'fa-info-circle',
             label: 'Info'
         }
     };
+    // Lookups go through a Map so an arbitrary type string can't reach
+    // Object.prototype properties.
+    const STYLE_BY_TYPE = new Map(Object.entries(TYPE_STYLES));
+
+    const VISUALLY_HIDDEN = 'position:absolute;width:1px;height:1px;padding:0;margin:-1px;' +
+        'overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;';
 
     // Track active notifications
     let activeNotifications = [];
@@ -62,8 +90,14 @@
     // keyed by notification id (cleaned up on dismiss). A Map rather than a
     // plain object so ids can never collide with prototype properties.
     const actionCallbacks = new Map();
+    // Auto-dismiss timers, keyed by notification id: { timer, remaining, startedAt }
+    const timers = new Map();
     let notificationCounter = 0;
 
+    function prefersReducedMotion() {
+        return !!(window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches);
+    }
+
     /**
      * Get or create the notifications container
      * @returns {HTMLElement} Container element
@@ -75,14 +109,55 @@
             container = document.createElement('div');
             container.id = CONFIG.containerId;
             container.className = 'fixed top-4 right-4 z-50 space-y-2 pointer-events-none';
-            container.setAttribute('aria-live', 'polite');
-            container.setAttribute('aria-label', 'Notifications');
             document.body.appendChild(container);
         }
 
+        if (!container.dataset.ledNotifications) {
+            container.dataset.ledNotifications = 'true';
+            // Announcements go through the dedicated live regions below; a
+            // live container would announce every toast a second time.
+            container.removeAttribute('aria-live');
+            container.setAttribute('role', 'region');
+            container.setAttribute('aria-label', 'Notifications');
+            // Let clicks pass through the empty parts of the stack even when
+            // the utility classes are not defined.
+            container.style.pointerEvents = 'none';
+        }
+
+        getLiveRegion(CONFIG.politeRegionId, 'status', 'polite');
+        getLiveRegion(CONFIG.assertiveRegionId, 'alert', 'assertive');
+
         return container;
     }
 
+    function getLiveRegion(id, role, politeness) {
+        let region = document.getElementById(id);
+        if (!region) {
+            region = document.createElement('div');
+            region.id = id;
+            region.setAttribute('role', role);
+            region.setAttribute('aria-live', politeness);
+            region.setAttribute('aria-atomic', 'true');
+            region.style.cssText = VISUALLY_HIDDEN;
+            document.body.appendChild(region);
+        }
+        return region;
+    }
+
+    /**
+     * Announce a message to screen readers once.
+     */
+    function announce(text, assertive) {
+        const region = getLiveRegion(
+            assertive ? CONFIG.assertiveRegionId : CONFIG.politeRegionId,
+            assertive ? 'alert' : 'status',
+            assertive ? 'assertive' : 'polite'
+        );
+        // Clear first so repeating the same message is announced again.
+        region.textContent = '';
+        setTimeout(() => { region.textContent = text; }, 50);
+    }
+
     /**
      * Escape HTML to prevent XSS
      * @param {string} text - Text to escape
@@ -94,16 +169,55 @@
         return div.innerHTML;
     }
 
+    function clearTimer(notificationId) {
+        const t = timers.get(notificationId);
+        if (t && t.timer) clearTimeout(t.timer);
+        timers.delete(notificationId);
+    }
+
+    function startTimer(notificationId, ms) {
+        const t = timers.get(notificationId) || {};
+        if (t.timer) clearTimeout(t.timer);
+        t.remaining = ms;
+        t.startedAt = Date.now();
+        t.timer = setTimeout(() => removeNotification(notificationId), ms);
+        timers.set(notificationId, t);
+    }
+
+    function pauseTimer(notificationId) {
+        const t = timers.get(notificationId);
+        if (!t || !t.timer) return;
+        clearTimeout(t.timer);
+        t.timer = null;
+        t.remaining = Math.max(0, t.remaining - (Date.now() - t.startedAt));
+    }
+
+    function resumeTimer(notificationId) {
+        const t = timers.get(notificationId);
+        if (!t || t.timer) return;
+        // Give the reader a moment after they move away.
+        startTimer(notificationId, Math.max(t.remaining, 2000));
+    }
+
     /**
      * Remove a notification by ID
      * @param {string} notificationId - Notification ID
      * @param {boolean} immediate - Skip fade animation
      */
     function removeNotification(notificationId, immediate = false) {
+        clearTimer(notificationId);
         const notification = document.getElementById(notificationId);
+
+        // Remove from tracking array
+        activeNotifications = activeNotifications.filter(id => id !== notificationId);
+        actionCallbacks.delete(notificationId);
+
         if (!notification) return;
 
-        if (immediate) {
+        // If focus is inside the toast, don't strand it on a removed node.
+        const hadFocus = notification.contains(document.activeElement);
+
+        if (immediate || prefersReducedMotion()) {
             notification.remove();
         } else {
             notification.style.transition = `opacity ${CONFIG.fadeOutDuration}ms, transform ${CONFIG.fadeOutDuration}ms`;
@@ -115,9 +229,16 @@
             }, CONFIG.fadeOutDuration);
         }
 
-        // Remove from tracking array
-        activeNotifications = activeNotifications.filter(id => id !== notificationId);
-        actionCallbacks.delete(notificationId);
+        if (hadFocus) {
+            const next = activeNotifications.length
+                ? document.querySelector(`#${activeNotifications[activeNotifications.length - 1]} button`)
+                : null;
+            if (next) {
+                next.focus();
+            } else if (document.activeElement && typeof document.activeElement.blur === 'function') {
+                document.activeElement.blur();
+            }
+        }
     }
 
     /**
@@ -131,15 +252,26 @@
         if (typeof options === 'string') {
             options = { type: options };
         }
+        options = options || {};
 
-        const type = options.type || 'info';
-        const duration = options.duration !== undefined ? options.duration : CONFIG.defaultDuration;
+        const type = STYLE_BY_TYPE.has(options.type) ? options.type : 'info';
+        const isError = type === 'error';
+        let duration = options.duration !== undefined
+            ? Number(options.duration)
+            : (isError ? CONFIG.errorMinDuration
+                : type === 'warning' ? CONFIG.warningDuration : CONFIG.defaultDuration);
+        // Errors must stay long enough to read; 0 still means "until dismissed".
+        if (isError && duration > 0 && duration < CONFIG.errorMinDuration) {
+            duration = CONFIG.errorMinDuration;
+        }
         const showIcon = options.showIcon !== false;
-        const dismissible = options.dismissible !== false;
+        // Errors always get a dismiss button.
+        const dismissible = isError || duration <= 0 || options.dismissible !== false;
 
-        const style = TYPE_STYLES[type] || TYPE_STYLES.info;
+        const style = STYLE_BY_TYPE.get(type);
         const container = getContainer();
         const notificationId = `notification_${++notificationCounter}`;
+        const reduceMotion = prefersReducedMotion();
 
         // Enforce max notifications limit
         while (activeNotifications.length >= CONFIG.maxNotifications) {
@@ -150,18 +282,25 @@
         const notification = document.createElement('div');
         notification.id = notificationId;
         notification.className = `${style.bg} text-white px-4 py-3 rounded-lg shadow-lg flex items-center gap-3 pointer-events-auto transform transition-all duration-300 ease-out`;
-        notification.style.opacity = '0';
-        notification.style.transform = 'translateX(100%)';
-        notification.setAttribute('role', 'alert');
+        notification.style.backgroundColor = style.color;
+        notification.style.color = '#ffffff';
+        notification.style.pointerEvents = 'auto';
+        notification.dataset.type = type;
+        if (reduceMotion) {
+            notification.style.transition = 'none';
+        } else {
+            notification.style.opacity = '0';
+            notification.style.transform = 'translateX(100%)';
+        }
 
         // Build content
         let html = '';
 
         if (showIcon) {
-            html += `<i class="fas ${style.icon} flex-shrink-0"></i>`;
+            html += `<i class="fas ${style.icon} flex-shrink-0" aria-hidden="true"></i>`;
         }
 
-        html += `<span class="flex-1 text-sm">${escapeHtml(message)}</span>`;
+        html += `<span class="flex-1 text-sm"><span style="${VISUALLY_HIDDEN}">${style.label}: </span>${escapeHtml(message)}</span>`;
 
         // Optional inline action button (e.g. "Restart Now" on a restart nudge).
         // The callback is stored by id and invoked via triggerAction, which
@@ -171,7 +310,8 @@
             html += `
                 <button type="button"
                         onclick="window.LEDMatrixWidgets.get('notification').triggerAction('${notificationId}')"
-                        class="flex-shrink-0 ml-2 px-3 py-1 text-xs font-semibold rounded-md bg-white bg-opacity-20 hover:bg-opacity-30 transition-colors duration-150">
+                        class="flex-shrink-0 ml-2 px-3 py-1 text-xs font-semibold rounded-md bg-white bg-opacity-20 hover:bg-opacity-30 transition-colors duration-150"
+                        style="background:rgba(255,255,255,.2);color:inherit;border:0;">
                     ${escapeHtml(options.actionLabel)}
                 </button>
             `;
@@ -182,8 +322,9 @@
                 <button type="button"
                         onclick="window.LEDMatrixWidgets.get('notification').dismiss('${notificationId}')"
                         class="flex-shrink-0 ml-2 w-5 h-5 flex items-center justify-center rounded-full opacity-70 hover:opacity-100 hover:bg-white hover:bg-opacity-20 transition-all duration-150"
-                        aria-label="Dismiss notification">
-                    <svg class="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
+                        style="width:1.75rem;height:1.75rem;display:inline-flex;align-items:center;justify-content:center;background:transparent;color:inherit;border:0;border-radius:9999px;cursor:pointer;"
+                        aria-label="Dismiss ${style.label.toLowerCase()} notification">
+                    <svg class="w-3 h-3" width="12" height="12" aria-hidden="true" focusable="false" fill="none" stroke="currentColor" viewBox="0 0 24 24" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
                         <path d="M6 18L18 6M6 6l12 12"></path>
                     </svg>
                 </button>
@@ -194,17 +335,29 @@
         container.appendChild(notification);
         activeNotifications.push(notificationId);
 
-        // Trigger animation (need to wait for DOM update)
-        requestAnimationFrame(() => {
-            notification.style.opacity = '1';
-            notification.style.transform = 'translateX(0)';
-        });
+        announce(`${style.label}: ${String(message)}`, isError);
 
-        // Auto-dismiss (0 = no auto-dismiss)
+        if (!reduceMotion) {
+            // Trigger animation (need to wait for DOM update)
+            requestAnimationFrame(() => {
+                notification.style.opacity = '1';
+                notification.style.transform = 'translateX(0)';
+            });
+        }
+
+        // Auto-dismiss (0 = no auto-dismiss), paused while hovered or focused
         if (duration > 0) {
-            setTimeout(() => {
-                removeNotification(notificationId);
-            }, duration);
+            startTimer(notificationId, duration);
+            notification.addEventListener('mouseenter', () => pauseTimer(notificationId));
+            notification.addEventListener('mouseleave', () => {
+                if (!notification.contains(document.activeElement)) resumeTimer(notificationId);
+            });
+            notification.addEventListener('focusin', () => pauseTimer(notificationId));
+            notification.addEventListener('focusout', (e) => {
+                if (!notification.contains(e.relatedTarget) && !notification.matches(':hover')) {
+                    resumeTimer(notificationId);
+                }
+            });
         }
 
         // Log for debugging
@@ -224,16 +377,17 @@
     // Register the widget
     window.LEDMatrixWidgets.register('notification', {
         name: 'Notification Widget',
-        version: '1.0.0',
+        version: '1.1.0',
 
         /**
          * Show a notification
          * @param {string} message - Message to display
          * @param {Object} options - Configuration options
          * @param {string} options.type - Notification type: success, error, warning, info
-         * @param {number} options.duration - Auto-dismiss duration in ms (0 = no auto-dismiss)
+         * @param {number} options.duration - Auto-dismiss duration in ms (0 = no auto-dismiss).
+         *        Errors are kept for at least 10s.
          * @param {boolean} options.showIcon - Show type icon (default: true)
-         * @param {boolean} options.dismissible - Show dismiss button (default: true)
+         * @param {boolean} options.dismissible - Show dismiss button (default: true; always true for errors)
          * @returns {string} Notification ID
          */
         show: showNotification,
@@ -295,15 +449,28 @@
     // Global shorthand function (backwards compatible with existing code).
     // Accepts either the legacy type string or a full options object
     // ({ type, duration, actionLabel, onAction, ... }).
+    // This always replaces the early fallbacks, whatever order they loaded in.
     window.showNotification = function(message, type = 'info') {
         return showNotification(message, typeof type === 'string' ? { type: type } : (type || {}));
     };
+    window.showNotification.__ledNotificationWidget = true;
 
-    // Initialize container on load
-    if (document.readyState === 'loading') {
-        document.addEventListener('DOMContentLoaded', getContainer);
-    } else {
+    function flushPending() {
         getContainer();
+        const pending = window.__pendingNotifications;
+        window.__pendingNotifications = [];
+        if (Array.isArray(pending)) {
+            pending.forEach(args => {
+                try { window.showNotification(args[0], args[1]); } catch (e) { console.error(e); }
+            });
+        }
+    }
+
+    // Initialize container (and show anything queued before we loaded)
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', flushPending);
+    } else {
+        flushPending();
     }
 
     console.log('[NotificationWidget] Notification widget registered');
diff --git a/web_interface/static/v3/js/widgets/number-input.js b/web_interface/static/v3/js/widgets/number-input.js
index d0f19507..e7b90ab5 100644
--- a/web_interface/static/v3/js/widgets/number-input.js
+++ b/web_interface/static/v3/js/widgets/number-input.js
@@ -101,8 +101,9 @@
                 html += `
                     <button type="button"
                             onclick="window.LEDMatrixWidgets.getHandlers('number-input').onDecrement('${fieldId}')"
-                            class="inline-flex items-center px-3 py-2 text-gray-600 bg-gray-100 border border-r-0 border-gray-300 hover:bg-gray-200 ${prefix ? '' : 'rounded-l-md'}">
-                        <i class="fas fa-minus text-xs"></i>
+                            class="inline-flex items-center px-3 py-2 text-gray-600 bg-gray-100 border border-r-0 border-gray-300 hover:bg-gray-200 ${prefix ? '' : 'rounded-l-md'}"
+                            aria-label="Decrease" aria-controls="${fieldId}_input">
+                        <i class="fas fa-minus text-xs" aria-hidden="true"></i>
                     </button>
                 `;
             }
@@ -128,8 +129,9 @@
                 html += `
                     <button type="button"
                             onclick="window.LEDMatrixWidgets.getHandlers('number-input').onIncrement('${fieldId}')"
-                            class="inline-flex items-center px-3 py-2 text-gray-600 bg-gray-100 border border-l-0 border-gray-300 hover:bg-gray-200 ${suffix ? '' : 'rounded-r-md'}">
-                        <i class="fas fa-plus text-xs"></i>
+                            class="inline-flex items-center px-3 py-2 text-gray-600 bg-gray-100 border border-l-0 border-gray-300 hover:bg-gray-200 ${suffix ? '' : 'rounded-r-md'}"
+                            aria-label="Increase" aria-controls="${fieldId}_input">
+                        <i class="fas fa-plus text-xs" aria-hidden="true"></i>
                     </button>
                 `;
             }
diff --git a/web_interface/static/v3/js/widgets/password-input.js b/web_interface/static/v3/js/widgets/password-input.js
index d87b6495..e1aec8b3 100644
--- a/web_interface/static/v3/js/widgets/password-input.js
+++ b/web_interface/static/v3/js/widgets/password-input.js
@@ -142,8 +142,9 @@
                             id="${fieldId}_toggle"
                             onclick="window.LEDMatrixWidgets.getHandlers('password-input').onToggle('${fieldId}')"
                             class="absolute inset-y-0 right-0 flex items-center pr-3 text-gray-400 hover:text-gray-600"
-                            title="Show/hide password">
-                        <i id="${fieldId}_icon" class="fas fa-eye"></i>
+                            title="Show/hide password"
+                            aria-label="Show password" aria-controls="${fieldId}_input">
+                        <i id="${fieldId}_icon" class="fas fa-eye" aria-hidden="true"></i>
                     </button>
                 `;
             }
@@ -297,16 +298,19 @@
                 const safeId = sanitizeId(fieldId);
                 const input = document.getElementById(`${safeId}_input`);
                 const icon = document.getElementById(`${safeId}_icon`);
+                const toggleBtn = document.getElementById(`${safeId}_toggle`);
 
                 if (input && icon) {
                     if (input.type === 'password') {
                         input.type = 'text';
                         icon.classList.remove('fa-eye');
                         icon.classList.add('fa-eye-slash');
+                        if (toggleBtn) toggleBtn.setAttribute('aria-label', 'Hide password');
                     } else {
                         input.type = 'password';
                         icon.classList.remove('fa-eye-slash');
                         icon.classList.add('fa-eye');
+                        if (toggleBtn) toggleBtn.setAttribute('aria-label', 'Show password');
                     }
                 }
             }
diff --git a/web_interface/static/v3/js/widgets/plugin-file-manager.js b/web_interface/static/v3/js/widgets/plugin-file-manager.js
index 71e8bff2..281e77b6 100644
--- a/web_interface/static/v3/js/widgets/plugin-file-manager.js
+++ b/web_interface/static/v3/js/widgets/plugin-file-manager.js
@@ -56,108 +56,141 @@
     if (!document.getElementById('pfm-styles')) {
         const style = document.createElement('style');
         style.id = 'pfm-styles';
+        // Colors come from the app theme tokens (app.css :root / [data-theme="dark"]),
+        // with the original light values as fallbacks for pages without app.css.
+        // The few shades the tokens don't cover are widget-local variables with
+        // a dark-theme override.
         style.textContent = `
-.pfm-root { font-family: inherit; }
+.pfm-root, .pfm-overlay {
+  --pfm-border-strong:#d1d5db; --pfm-subtle:#f3f4f6; --pfm-subtle-hover:#e5e7eb;
+  --pfm-danger-border:#fecaca; --pfm-danger-text:#991b1b; --pfm-today:#fef9c3;
+  --pfm-text-muted:#6b7280;
+}
+[data-theme="dark"] .pfm-root, [data-theme="dark"] .pfm-overlay {
+  --pfm-border-strong:#4b5563; --pfm-subtle:#374151; --pfm-subtle-hover:#4b5563;
+  --pfm-danger-border:#991b1b; --pfm-danger-text:#fecaca; --pfm-today:#422006;
+  --pfm-text-muted:#9ca3af;
+}
+.pfm-root { font-family: inherit; color:var(--color-text-primary,#111827); }
 .pfm-header { display:flex; align-items:center; justify-content:space-between;
               margin-bottom:.75rem; }
-.pfm-title  { font-size:1rem; font-weight:600; color:#111827; }
-.pfm-dir    { font-size:.75rem; color:#6b7280; margin-top:.125rem; }
-.pfm-upload { border:2px dashed #d1d5db; border-radius:.5rem; padding:1.25rem;
+.pfm-title  { font-size:1rem; font-weight:600; color:var(--color-text-primary,#111827); }
+.pfm-dir    { font-size:.75rem; color:var(--pfm-text-muted); margin-top:.125rem; }
+.pfm-upload { border:2px dashed var(--pfm-border-strong); border-radius:.5rem; padding:1.25rem;
               text-align:center; cursor:pointer; transition:border-color .15s,background .15s; }
-.pfm-upload:hover,.pfm-upload.dragover { border-color:#3b82f6; background:#eff6ff; }
-.pfm-upload p  { font-size:.875rem; color:#4b5563; margin:.25rem 0 0; }
-.pfm-upload small { font-size:.75rem; color:#9ca3af; }
+.pfm-upload:hover,.pfm-upload.dragover { border-color:var(--color-primary,#3b82f6); background:var(--color-info-bg,#eff6ff); }
+.pfm-upload p  { font-size:.875rem; color:var(--color-text-tertiary,#4b5563); margin:.25rem 0 0; }
+.pfm-upload small { font-size:.75rem; color:var(--pfm-text-muted); }
+.pfm-upload-icon { font-size:1.5rem; color:var(--pfm-text-muted); }
 .pfm-grid  { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
              gap:.75rem; margin-top:.75rem; }
-.pfm-card  { border:1px solid #e5e7eb; border-radius:.5rem; padding:.875rem;
-             background:#fff; transition:box-shadow .15s; }
-.pfm-card:hover { box-shadow:0 1px 4px rgba(0,0,0,.1); }
+.pfm-card  { border:1px solid var(--color-border,#e5e7eb); border-radius:.5rem; padding:.875rem;
+             background:var(--color-surface,#fff); transition:box-shadow .15s; }
+.pfm-card:hover { box-shadow:var(--shadow-md,0 1px 4px rgba(0,0,0,.1)); }
 .pfm-card.disabled { opacity:.55; }
 .pfm-card-top  { display:flex; align-items:center; justify-content:space-between;
                  margin-bottom:.5rem; }
-.pfm-card-icon { width:2rem; height:2rem; background:#f3f4f6; border-radius:.375rem;
+.pfm-card-icon { width:2rem; height:2rem; background:var(--pfm-subtle); border-radius:.375rem;
                  display:flex; align-items:center; justify-content:center;
-                 color:#6b7280; font-size:1rem; }
-.pfm-card-name { font-weight:600; color:#111827; font-size:.875rem; margin:.375rem 0 .125rem; }
-.pfm-card-meta { font-size:.75rem; color:#6b7280; line-height:1.5; }
+                 color:var(--pfm-text-muted); font-size:1rem; }
+.pfm-card-name { font-weight:600; color:var(--color-text-primary,#111827); font-size:.875rem; margin:.375rem 0 .125rem; }
+.pfm-card-meta { font-size:.75rem; color:var(--pfm-text-muted); line-height:1.5; }
 .pfm-card-actions { display:flex; gap:.375rem; margin-top:.625rem; }
 .pfm-btn       { display:inline-flex; align-items:center; gap:.25rem; padding:.375rem .75rem;
                  border-radius:.375rem; font-size:.8125rem; font-weight:500;
                  border:none; cursor:pointer; transition:background .15s; }
-.pfm-btn-primary   { background:#2563eb; color:#fff; flex:1; justify-content:center; }
-.pfm-btn-primary:hover  { background:#1d4ed8; }
+.pfm-btn:focus-visible { outline:2px solid var(--color-primary,#2563eb); outline-offset:2px; }
+.pfm-btn:disabled { opacity:.5; cursor:not-allowed; }
+.pfm-btn-primary   { background:var(--color-primary,#2563eb); color:#fff; flex:1; justify-content:center; }
+.pfm-btn-primary:hover  { background:var(--color-primary-hover,#1d4ed8); }
+/* Solid fills with white text: fixed shades read well on both themes. */
 .pfm-btn-danger    { background:#dc2626; color:#fff; }
 .pfm-btn-danger:hover   { background:#b91c1c; }
-.pfm-btn-secondary { background:#f3f4f6; color:#374151; border:1px solid #d1d5db; }
-.pfm-btn-secondary:hover { background:#e5e7eb; }
+.pfm-btn-secondary { background:var(--pfm-subtle); color:var(--color-text-secondary,#374151); border:1px solid var(--pfm-border-strong); }
+.pfm-btn-secondary:hover { background:var(--pfm-subtle-hover); }
 .pfm-btn-sm { padding:.25rem .5rem; font-size:.75rem; }
 .pfm-btn-create { background:#059669; color:#fff; }
 .pfm-btn-create:hover { background:#047857; }
 .pfm-toggle-wrap  { display:flex; align-items:center; gap:.375rem; }
-.pfm-toggle-label { font-size:.75rem; color:#6b7280; }
+.pfm-toggle-label { font-size:.75rem; color:var(--pfm-text-muted); }
 .pfm-toggle-cb    { position:relative; display:inline-block; width:2rem; height:1.125rem; }
 .pfm-toggle-cb input { opacity:0; width:0; height:0; }
-.pfm-toggle-slider { position:absolute; inset:0; background:#d1d5db; border-radius:9999px;
+.pfm-toggle-slider { position:absolute; inset:0; background:var(--pfm-border-strong); border-radius:9999px;
                      cursor:pointer; transition:background .2s; }
 .pfm-toggle-slider:before { content:''; position:absolute; height:.75rem; width:.75rem;
                              left:.1875rem; bottom:.1875rem; background:#fff;
                              border-radius:50%; transition:transform .2s; }
 .pfm-toggle-cb input:checked + .pfm-toggle-slider { background:#10b981; }
 .pfm-toggle-cb input:checked + .pfm-toggle-slider:before { transform:translateX(.875rem); }
-.pfm-empty { text-align:center; padding:2rem; color:#9ca3af; }
+.pfm-toggle-cb input:focus-visible + .pfm-toggle-slider { outline:2px solid var(--color-primary,#2563eb); outline-offset:2px; }
+.pfm-empty { text-align:center; padding:2rem; color:var(--pfm-text-muted); }
 .pfm-empty i { font-size:2rem; margin-bottom:.5rem; display:block; }
+.pfm-error-text { color:var(--color-error,#dc2626); }
 
 /* Modal */
 .pfm-overlay { position:fixed; inset:0; background:rgba(0,0,0,.5);
                display:flex; align-items:flex-start; justify-content:center;
                z-index:9999; padding:2rem 1rem; overflow-y:auto; }
-.pfm-modal   { background:#fff; border-radius:.75rem; width:100%; max-width:56rem;
+.pfm-modal   { background:var(--color-surface,#fff); color:var(--color-text-primary,#111827);
+               border-radius:.75rem; width:100%; max-width:56rem;
                box-shadow:0 20px 50px rgba(0,0,0,.3); margin:auto; }
+.pfm-modal:focus { outline:none; }
 .pfm-modal-header { display:flex; align-items:center; justify-content:space-between;
-                    padding:1rem 1.25rem; border-bottom:1px solid #e5e7eb; }
-.pfm-modal-title  { font-size:1rem; font-weight:600; color:#111827; }
+                    padding:1rem 1.25rem; border-bottom:1px solid var(--color-border,#e5e7eb); }
+.pfm-modal-title  { font-size:1rem; font-weight:600; color:var(--color-text-primary,#111827); }
 .pfm-modal-body   { padding:1.25rem; overflow-y:auto; max-height:70vh; }
 .pfm-modal-footer { display:flex; justify-content:flex-end; gap:.5rem;
-                    padding:.875rem 1.25rem; border-top:1px solid #e5e7eb;
-                    background:#f9fafb; border-radius:0 0 .75rem .75rem; }
+                    padding:.875rem 1.25rem; border-top:1px solid var(--color-border,#e5e7eb);
+                    background:var(--color-background,#f9fafb); border-radius:0 0 .75rem .75rem; }
 
 /* Entry table */
 .pfm-table-wrap { overflow-x:auto; }
 .pfm-table { width:100%; border-collapse:collapse; font-size:.8125rem; }
-.pfm-table th { background:#f9fafb; text-align:left; padding:.5rem .625rem;
-                font-weight:600; color:#374151; border-bottom:1px solid #e5e7eb;
+.pfm-table th { background:var(--color-background,#f9fafb); text-align:left; padding:.5rem .625rem;
+                font-weight:600; color:var(--color-text-secondary,#374151); border-bottom:1px solid var(--color-border,#e5e7eb);
                 white-space:nowrap; position:sticky; top:0; }
-.pfm-table td { padding:.375rem .625rem; border-bottom:1px solid #f3f4f6;
+.pfm-table td { padding:.375rem .625rem; border-bottom:1px solid var(--color-border-light,#f3f4f6);
                 vertical-align:top; }
-.pfm-table tr.today-row td { background:#fef9c3; }
+.pfm-table tr.today-row td { background:var(--pfm-today); }
 .pfm-table td input, .pfm-table td textarea {
-  width:100%; border:1px solid #d1d5db; border-radius:.25rem;
+  width:100%; border:1px solid var(--pfm-border-strong); border-radius:.25rem;
   padding:.25rem .375rem; font-size:.8125rem; font-family:inherit;
-  resize:vertical; background:#fff; }
+  resize:vertical; background:var(--color-surface,#fff); color:var(--color-text-primary,#111827); }
 .pfm-table td input:focus, .pfm-table td textarea:focus {
-  outline:none; border-color:#3b82f6; }
+  outline:none; border-color:var(--color-primary,#3b82f6); box-shadow:0 0 0 2px var(--color-primary,#3b82f6); }
 .pfm-day-col { width:3rem; text-align:center; font-weight:600;
-               color:#6b7280; white-space:nowrap; }
+               color:var(--pfm-text-muted); white-space:nowrap; }
+.pfm-table-info { font-size:.75rem; color:var(--pfm-text-muted); margin-bottom:.375rem; }
 .pfm-pagination { display:flex; align-items:center; justify-content:space-between;
-                  margin-top:.75rem; font-size:.8125rem; color:#6b7280; }
+                  margin-top:.75rem; font-size:.8125rem; color:var(--pfm-text-muted); }
 .pfm-page-jump  { display:flex; align-items:center; gap:.375rem; font-size:.8125rem; }
-.pfm-page-jump input { width:3.5rem; padding:.25rem .375rem; border:1px solid #d1d5db;
-                        border-radius:.25rem; text-align:center; }
+.pfm-page-jump input { width:3.5rem; padding:.25rem .375rem; border:1px solid var(--pfm-border-strong);
+                        border-radius:.25rem; text-align:center;
+                        background:var(--color-surface,#fff); color:var(--color-text-primary,#111827); }
+.pfm-json-ta { width:100%; font-family:monospace; font-size:.75rem; border:1px solid var(--pfm-border-strong);
+               border-radius:.375rem; padding:.5rem;
+               background:var(--color-surface,#fff); color:var(--color-text-primary,#111827); }
+.pfm-json-err { color:var(--color-error,#dc2626); font-size:.75rem; margin-top:.25rem; }
 
 /* Form in create modal */
 .pfm-field { margin-bottom:.875rem; }
 .pfm-field label { display:block; font-size:.875rem; font-weight:500;
-                   color:#374151; margin-bottom:.25rem; }
-.pfm-field input { width:100%; padding:.4rem .625rem; border:1px solid #d1d5db;
-                   border-radius:.375rem; font-size:.875rem; }
-.pfm-field input:focus { outline:none; border-color:#3b82f6; }
-.pfm-field-hint { font-size:.75rem; color:#9ca3af; margin-top:.2rem; }
-.pfm-field-error { font-size:.75rem; color:#dc2626; margin-top:.2rem; }
+                   color:var(--color-text-secondary,#374151); margin-bottom:.25rem; }
+.pfm-field input { width:100%; padding:.4rem .625rem; border:1px solid var(--pfm-border-strong);
+                   border-radius:.375rem; font-size:.875rem;
+                   background:var(--color-surface,#fff); color:var(--color-text-primary,#111827); }
+.pfm-field input:focus { outline:none; border-color:var(--color-primary,#3b82f6); box-shadow:0 0 0 2px var(--color-primary,#3b82f6); }
+.pfm-field-hint { font-size:.75rem; color:var(--pfm-text-muted); margin-top:.2rem; }
+.pfm-field-error { font-size:.75rem; color:var(--color-error,#dc2626); margin-top:.2rem; }
 
 /* Delete danger box */
-.pfm-danger-box { background:#fef2f2; border:1px solid #fecaca;
+.pfm-danger-box { background:var(--color-error-bg,#fef2f2); border:1px solid var(--pfm-danger-border);
                   border-radius:.5rem; padding:.875rem; font-size:.875rem;
-                  color:#991b1b; }
+                  color:var(--pfm-danger-text); }
+
+@media (prefers-reduced-motion: reduce) {
+  .pfm-upload, .pfm-card, .pfm-btn, .pfm-toggle-slider, .pfm-toggle-slider:before { transition:none; }
+}
 `;
         document.head.appendChild(style);
     }
@@ -356,7 +389,8 @@
                 delBtn.dataset.pfmAction = 'delete';
                 delBtn.dataset.pfmField  = fieldId;
                 delBtn.dataset.pfmFile   = f.filename;
-                delBtn.innerHTML = '<i class="fas fa-trash"></i>'; // static
+                delBtn.setAttribute('aria-label', 'Delete ' + f.filename);
+                delBtn.innerHTML = '<i class="fas fa-trash" aria-hidden="true"></i>'; // static
                 actions.appendChild(delBtn);
             }
             card.appendChild(actions);
@@ -375,18 +409,18 @@
         modal.className = 'pfm-modal';
         safeSetHTML(modal, `
             <div class="pfm-modal-header">
-                <span class="pfm-modal-title"><i class="fas fa-edit mr-2"></i>${escHtml(filename)}</span>
-                <button class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_modal_close">
-                    <i class="fas fa-times"></i>
+                <span class="pfm-modal-title" id="${escHtml(fieldId)}_modal_title"><i class="fas fa-edit mr-2" aria-hidden="true"></i>${escHtml(filename)}</span>
+                <button type="button" class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_modal_close" aria-label="Close">
+                    <i class="fas fa-times" aria-hidden="true"></i>
                 </button>
             </div>
             <div class="pfm-modal-body" id="${escHtml(fieldId)}_edit_body">
-                <div class="pfm-empty"><i class="fas fa-spinner fa-spin"></i>Loading…</div>
+                <div class="pfm-empty"><i class="fas fa-spinner fa-spin" aria-hidden="true"></i>Loading…</div>
             </div>
             <div class="pfm-modal-footer">
-                <button class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_modal_cancel">Cancel</button>
-                <button class="pfm-btn pfm-btn-primary" id="${escHtml(fieldId)}_save_btn">
-                    <i class="fas fa-save mr-1"></i>Save
+                <button type="button" class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_modal_cancel">Cancel</button>
+                <button type="button" class="pfm-btn pfm-btn-primary" id="${escHtml(fieldId)}_save_btn">
+                    <i class="fas fa-save mr-1" aria-hidden="true"></i>Save
                 </button>
             </div>`);
         overlay.appendChild(modal);
@@ -394,11 +428,12 @@
         modal.querySelector(`#${CSS.escape(fieldId)}_modal_close`).addEventListener('click', () => window._pfmCloseModal(fieldId));
         modal.querySelector(`#${CSS.escape(fieldId)}_modal_cancel`).addEventListener('click', () => window._pfmCloseModal(fieldId));
         modal.querySelector(`#${CSS.escape(fieldId)}_save_btn`).addEventListener('click', () => window._pfmSave(fieldId, filename));
+        trapModal(fieldId, modal, `${fieldId}_modal_title`);
 
         const data = await callAction(st.pluginId, st.actions.get, { filename }).catch(() => null);
         const body = document.getElementById(`${fieldId}_edit_body`);
         if (!data || data.status !== 'success' || !body) {
-            if (body) safeSetHTML(body, '<div class="pfm-empty" style="color:#dc2626">Failed to load file.</div>');
+            if (body) safeSetHTML(body, `<div class="pfm-empty pfm-error-text">Couldn't load ${escHtml(filename)}. Close this window and try again.</div>`);
             return;
         }
 
@@ -413,10 +448,10 @@
             // Textarea path: _editData stays null; save() reads from the <textarea>
             st._editData = null;
             safeSetHTML(body, `
-                <textarea id="${escHtml(fieldId)}_json_ta" rows="20"
-                    style="width:100%;font-family:monospace;font-size:.75rem;border:1px solid #d1d5db;border-radius:.375rem;padding:.5rem;"
+                <textarea id="${escHtml(fieldId)}_json_ta" rows="20" class="pfm-json-ta"
+                    aria-label="File contents (JSON)" aria-describedby="${escHtml(fieldId)}_json_err"
                 >${escHtml(JSON.stringify(content, null, 2))}</textarea>
-                <div id="${escHtml(fieldId)}_json_err" style="color:#dc2626;font-size:.75rem;margin-top:.25rem;"></div>`);
+                <div id="${escHtml(fieldId)}_json_err" class="pfm-json-err" role="alert"></div>`);
         }
     };
 
@@ -461,7 +496,7 @@
             const totalPages = Math.ceil(total / perPage);
 
             safeSetHTML(container, `
-                <div class="pfm-table-info" style="font-size:.75rem;color:#6b7280;margin-bottom:.375rem;">
+                <div class="pfm-table-info">
                     ${total} entries total
                     <button class="pfm-btn pfm-btn-secondary pfm-btn-sm" style="margin-left:.5rem"
                         onclick="(function(){const targetPage=Math.ceil(${todayDoy}/${perPage});window._pfmTablePage('${fieldId}',targetPage);setTimeout(function(){const row=document.querySelector('tr[data-day=\\'${todayDoy}\\']');if(row)row.scrollIntoView({block:'center'});},60);})()">
@@ -579,9 +614,9 @@
         modal.style.maxWidth = '28rem';
         safeSetHTML(modal, `
             <div class="pfm-modal-header">
-                <span class="pfm-modal-title"><i class="fas fa-trash mr-2"></i>Delete File</span>
-                <button class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_del_close">
-                    <i class="fas fa-times"></i>
+                <span class="pfm-modal-title" id="${escHtml(fieldId)}_del_title"><i class="fas fa-trash mr-2" aria-hidden="true"></i>Delete File</span>
+                <button type="button" class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_del_close" aria-label="Close">
+                    <i class="fas fa-times" aria-hidden="true"></i>
                 </button>
             </div>
             <div class="pfm-modal-body">
@@ -591,15 +626,18 @@
                 </div>
             </div>
             <div class="pfm-modal-footer">
-                <button class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_del_cancel">Cancel</button>
-                <button class="pfm-btn pfm-btn-danger" id="${escHtml(fieldId)}_del_confirm">
-                    <i class="fas fa-trash mr-1"></i>Delete
+                <button type="button" class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_del_cancel">Cancel</button>
+                <button type="button" class="pfm-btn pfm-btn-danger" id="${escHtml(fieldId)}_del_confirm">
+                    <i class="fas fa-trash mr-1" aria-hidden="true"></i>Delete
                 </button>
             </div>`);
         overlay.appendChild(modal);
+        const cancelBtn = modal.querySelector(`#${CSS.escape(fieldId)}_del_cancel`);
         modal.querySelector(`#${CSS.escape(fieldId)}_del_close`).addEventListener('click', () => window._pfmCloseModal(fieldId));
-        modal.querySelector(`#${CSS.escape(fieldId)}_del_cancel`).addEventListener('click', () => window._pfmCloseModal(fieldId));
+        cancelBtn.addEventListener('click', () => window._pfmCloseModal(fieldId));
         modal.querySelector(`#${CSS.escape(fieldId)}_del_confirm`).addEventListener('click', () => window._pfmConfirmDelete(fieldId, filename));
+        // Destructive dialog: start on Cancel.
+        trapModal(fieldId, modal, `${fieldId}_del_title`, cancelBtn);
     };
 
     window._pfmConfirmDelete = async function (fieldId, filename) {
@@ -611,7 +649,7 @@
             window._pfmCloseModal(fieldId);
             await loadFiles(fieldId);
         } else {
-            notify('Delete failed: ' + (result.message || ''), 'error');
+            notify("Couldn't delete the file: " + (result.message || 'unknown error') + '. Try again.', 'error');
         }
     };
 
@@ -626,13 +664,13 @@
         modal.style.maxWidth = '32rem';
         safeSetHTML(modal, `
             <div class="pfm-modal-header">
-                <span class="pfm-modal-title"><i class="fas fa-plus-circle mr-2"></i>Create New File</span>
-                <button class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_cre_close">
-                    <i class="fas fa-times"></i>
+                <span class="pfm-modal-title" id="${escHtml(fieldId)}_cre_title"><i class="fas fa-plus-circle mr-2" aria-hidden="true"></i>Create New File</span>
+                <button type="button" class="pfm-btn pfm-btn-secondary pfm-btn-sm" id="${escHtml(fieldId)}_cre_close" aria-label="Close">
+                    <i class="fas fa-times" aria-hidden="true"></i>
                 </button>
             </div>
             <div class="pfm-modal-body">
-                <div id="${escHtml(fieldId)}_create_err" class="pfm-field-error" style="margin-bottom:.5rem;"></div>
+                <div id="${escHtml(fieldId)}_create_err" class="pfm-field-error" role="alert" style="margin-bottom:.5rem;"></div>
                 ${fields.map(f => `
                 <div class="pfm-field">
                     <label for="${escHtml(fieldId)}_cf_${escHtml(f.key)}">${escHtml(f.label || f.key)}</label>
@@ -643,16 +681,16 @@
                 </div>`).join('')}
             </div>
             <div class="pfm-modal-footer">
-                <button class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_cre_cancel">Cancel</button>
-                <button class="pfm-btn pfm-btn-create" id="${escHtml(fieldId)}_create_btn">
-                    <i class="fas fa-plus mr-1"></i>Create
+                <button type="button" class="pfm-btn pfm-btn-secondary" id="${escHtml(fieldId)}_cre_cancel">Cancel</button>
+                <button type="button" class="pfm-btn pfm-btn-create" id="${escHtml(fieldId)}_create_btn">
+                    <i class="fas fa-plus mr-1" aria-hidden="true"></i>Create
                 </button>
-            </div>
             </div>`);
         overlay.appendChild(modal);
         modal.querySelector(`#${CSS.escape(fieldId)}_cre_close`).addEventListener('click', () => window._pfmCloseModal(fieldId));
         modal.querySelector(`#${CSS.escape(fieldId)}_cre_cancel`).addEventListener('click', () => window._pfmCloseModal(fieldId));
         modal.querySelector(`#${CSS.escape(fieldId)}_create_btn`).addEventListener('click', () => window._pfmConfirmCreate(fieldId));
+        trapModal(fieldId, modal, `${fieldId}_cre_title`, modal.querySelector('.pfm-field input'));
     };
 
     window._pfmConfirmCreate = async function (fieldId) {
@@ -739,11 +777,28 @@
         return overlay;
     }
 
+    // Dialog semantics + focus trap for an open modal (utils/dialog.js).
+    // Every close path goes through _pfmCloseModal, which releases it.
+    function trapModal(fieldId, modal, titleId, initialFocus) {
+        if (!window.LEDDialog) return;
+        const st = getState(fieldId);
+        st._releaseDialog = window.LEDDialog.trap(modal, {
+            labelledBy: titleId,
+            initialFocus: initialFocus || null,
+            onEscape: () => window._pfmCloseModal(fieldId)
+        });
+    }
+
     window._pfmCloseModal = function (fieldId) {
         const st = getState(fieldId);
         if (st.currentModal) { st.currentModal.remove(); st.currentModal = null; }
         st._editData = null;
         st._editFilename = null;
+        if (st._releaseDialog) {
+            const release = st._releaseDialog;
+            st._releaseDialog = null;
+            release();
+        }
     };
 
     // ─── Widget registration ──────────────────────────────────────────────────
@@ -793,7 +848,7 @@
                         <input type="file" id="${fieldId}_file_input" accept=".json"
                                style="display:none"
                                onchange="if(this.files[0])window._pfmUpload('${fieldId}',this.files[0]);this.value=''">
-                        <i class="fas fa-cloud-upload-alt" style="font-size:1.5rem;color:#9ca3af;"></i>
+                        <i class="fas fa-cloud-upload-alt pfm-upload-icon" aria-hidden="true"></i>
                         <p>Drag and drop or click to upload</p>
                         <small>${escHtml(st.uploadHint)}</small>
                     </div>` : ''}
diff --git a/web_interface/static/v3/js/widgets/schedule-picker.js b/web_interface/static/v3/js/widgets/schedule-picker.js
index df5ff550..8f152841 100644
--- a/web_interface/static/v3/js/widgets/schedule-picker.js
+++ b/web_interface/static/v3/js/widgets/schedule-picker.js
@@ -49,6 +49,7 @@
         saturday: 'Saturday',
         sunday: 'Sunday'
     };
+    const DAY_LABEL_MAP = new Map(Object.entries(DAY_LABELS));
 
     // Use BaseWidget utilities if available
     const base = window.BaseWidget ? new window.BaseWidget('SchedulePicker', '1.0.0') : null;
@@ -283,17 +284,19 @@
             // Render each day row
             DAYS.forEach(day => {
                 const dayConfig = schedule.days[day];
+                const dayLabel = escapeHtml(DAY_LABEL_MAP.get(day) || day);
                 const disabled = !dayConfig.enabled;
                 const disabledClass = disabled ? 'bg-gray-100' : '';
 
                 html += `
                     <tr class="hover:bg-gray-50" id="${fieldId}_row_${day}">
                         <td class="px-3 py-2 whitespace-nowrap">
-                            <span class="text-sm font-medium text-gray-900">${escapeHtml(DAY_LABELS[day])}</span>
+                            <span class="text-sm font-medium text-gray-900">${dayLabel}</span>
                         </td>
                         <td class="px-3 py-2 whitespace-nowrap">
                             <input type="checkbox"
                                    id="${fieldId}_${day}_enabled"
+                                   aria-label="${dayLabel} enabled"
                                    ${dayConfig.enabled ? 'checked' : ''}
                                    onchange="window.LEDMatrixWidgets.getHandlers('schedule-picker').onDayEnabledChange('${fieldId}', '${day}', this.checked)"
                                    class="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded">
@@ -301,6 +304,7 @@
                         <td class="px-3 py-2 whitespace-nowrap">
                             <input type="time"
                                    id="${fieldId}_${day}_start"
+                                   aria-label="${dayLabel} start time"
                                    value="${escapeHtml(dayConfig.start_time)}"
                                    ${disabled ? 'disabled' : ''}
                                    onchange="window.LEDMatrixWidgets.getHandlers('schedule-picker').onDayTimeChange('${fieldId}', '${day}')"
@@ -309,6 +313,7 @@
                         <td class="px-3 py-2 whitespace-nowrap">
                             <input type="time"
                                    id="${fieldId}_${day}_end"
+                                   aria-label="${dayLabel} end time"
                                    value="${escapeHtml(dayConfig.end_time)}"
                                    ${disabled ? 'disabled' : ''}
                                    onchange="window.LEDMatrixWidgets.getHandlers('schedule-picker').onDayTimeChange('${fieldId}', '${day}')"
diff --git a/web_interface/static/v3/js/widgets/text-input.js b/web_interface/static/v3/js/widgets/text-input.js
index d209967d..97c5fa09 100644
--- a/web_interface/static/v3/js/widgets/text-input.js
+++ b/web_interface/static/v3/js/widgets/text-input.js
@@ -121,8 +121,8 @@
                             id="${fieldId}_clear"
                             onclick="window.LEDMatrixWidgets.getHandlers('text-input').onClear('${fieldId}')"
                             class="inline-flex items-center px-2 text-gray-400 hover:text-gray-600 ${currentValue ? '' : 'hidden'}"
-                            title="Clear">
-                        <i class="fas fa-times"></i>
+                            title="Clear" aria-label="Clear">
+                        <i class="fas fa-times" aria-hidden="true"></i>
                     </button>
                 `;
             }
diff --git a/web_interface/static/v3/js/widgets/time-picker.js b/web_interface/static/v3/js/widgets/time-picker.js
index 30366022..ad118805 100644
--- a/web_interface/static/v3/js/widgets/time-picker.js
+++ b/web_interface/static/v3/js/widgets/time-picker.js
@@ -90,7 +90,7 @@
                            onchange="window.LEDMatrixWidgets.getHandlers('time-picker').onChange('${fieldId}')"
                            class="form-input w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500 ${disabled ? 'bg-gray-100 cursor-not-allowed' : 'bg-white'} text-black pr-10">
                     <div class="absolute inset-y-0 right-0 flex items-center pr-3 pointer-events-none">
-                        <i class="fas fa-clock text-gray-400"></i>
+                        <i class="fas fa-clock text-gray-400" aria-hidden="true"></i>
                     </div>
                 </div>
             `;
@@ -101,8 +101,8 @@
                             id="${fieldId}_clear"
                             onclick="window.LEDMatrixWidgets.getHandlers('time-picker').onClear('${fieldId}')"
                             class="ml-2 inline-flex items-center px-2 py-2 text-gray-400 hover:text-gray-600 ${currentValue ? '' : 'hidden'}"
-                            title="Clear">
-                        <i class="fas fa-times"></i>
+                            title="Clear" aria-label="Clear time">
+                        <i class="fas fa-times" aria-hidden="true"></i>
                     </button>
                 `;
             }
diff --git a/web_interface/static/v3/plugins_manager.js b/web_interface/static/v3/plugins_manager.js
index a83c6897..95bb7155 100644
--- a/web_interface/static/v3/plugins_manager.js
+++ b/web_interface/static/v3/plugins_manager.js
@@ -1044,20 +1044,11 @@ window.initPluginsPage = function() {
     setupInstalledFilterListeners();
     setupStoreFilterListeners();
 
-    if (closeOnDemandModalBtn) {
-        closeOnDemandModalBtn.replaceWith(closeOnDemandModalBtn.cloneNode(true));
-        document.getElementById('close-on-demand-modal').addEventListener('click', closeOnDemandModal);
-    }
-    if (cancelOnDemandBtn) {
-        cancelOnDemandBtn.replaceWith(cancelOnDemandBtn.cloneNode(true));
-        document.getElementById('cancel-on-demand').addEventListener('click', closeOnDemandModal);
-    }
-    if (onDemandForm) {
-        onDemandForm.replaceWith(onDemandForm.cloneNode(true));
-        document.getElementById('on-demand-form').addEventListener('submit', submitOnDemandRequest);
-    }
-    if (onDemandModal) {
-        onDemandModal.onclick = closeOnDemandModalOnBackdrop;
+    // The on-demand modal lives in base.html and survives tab swaps, so bind it
+    // through the one guarded initializer instead of cloning its controls here
+    // (cloning copied data-initialized and left two code paths owning listeners).
+    if (closeOnDemandModalBtn || cancelOnDemandBtn || onDemandForm || onDemandModal) {
+        initializeOnDemandModal();
     }
 
     // Load on-demand status silently (false = don't show notification)
@@ -1385,7 +1376,7 @@ function getInstalledFilter() {
             el: 'installed-search',
             clearEl: 'installed-search-clear',
             fields: ['name', 'id', 'description', 'author', 'category', 'tags'],
-            debounceMs: 200,
+            debounceMs: 150,
         },
         sort: {
             el: 'installed-sort',
@@ -1551,7 +1542,7 @@ function renderInstalledCards(plugins, total) {
         return JSON.stringify(text || '');
     };
 
-    container.innerHTML = plugins.map(plugin => {
+    setGridHtmlIfChanged(container, plugins.map(plugin => {
         // Convert enabled to boolean for consistent rendering
         const enabledBool = Boolean(plugin.enabled);
 
@@ -1582,15 +1573,19 @@ function renderInstalledCards(plugins, total) {
                 <!-- Toggle Switch in Top Right -->
                 <div class="flex-shrink-0 ml-4">
                     <label class="relative inline-flex items-center cursor-pointer group">
+                        <!-- input.peer must stay immediately before the visible pill:
+                             peer-focus:* only reaches a following sibling. -->
                         <input type="checkbox"
                                class="sr-only peer"
+                               role="switch"
+                               aria-label="Enable ${escapeAttr(plugin.name || plugin.id)}"
                                id="toggle-${escapedPluginId}"
                                ${enabledBool ? 'checked' : ''}
                                data-plugin-id="${escapedPluginId}"
                                data-action="toggle">
-                        <div class="flex items-center gap-2 px-3 py-1.5 rounded-lg border-2 transition-all duration-200 ${enabledBool ? 'bg-green-50 border-green-500' : 'bg-gray-50 border-gray-300'} hover:shadow-md group-hover:scale-105">
+                        <div class="flex items-center gap-2 px-3 py-1.5 rounded-lg border-2 transition-all duration-200 ${enabledBool ? 'bg-green-50 border-green-500' : 'bg-gray-50 border-gray-300'} hover:shadow-md group-hover:scale-105 peer-focus:outline-none peer-focus:ring-4 peer-focus:ring-blue-300" aria-hidden="true">
                             <!-- Toggle Switch -->
-                            <div class="relative w-14 h-7 ${enabledBool ? 'bg-green-500' : 'bg-gray-300'} peer-focus:outline-none peer-focus:ring-4 peer-focus:ring-blue-300 rounded-full peer peer-checked:bg-green-500 transition-colors duration-200 ease-in-out shadow-inner">
+                            <div class="relative w-14 h-7 ${enabledBool ? 'bg-green-500' : 'bg-gray-300'} rounded-full transition-colors duration-200 ease-in-out shadow-inner">
                                 <div class="absolute top-[3px] left-[3px] bg-white ${enabledBool ? 'translate-x-full' : ''} border-2 ${enabledBool ? 'border-green-500' : 'border-gray-400'} rounded-full h-5 w-5 transition-all duration-200 ease-in-out shadow-sm flex items-center justify-center">
                                     ${enabledBool ? '<i class="fas fa-check text-green-600 text-xs"></i>' : '<i class="fas fa-times text-gray-400 text-xs"></i>'}
                                 </div>
@@ -1638,9 +1633,30 @@ function renderInstalledCards(plugins, total) {
             </div>
         </div>
         `;
-    }).join('');
+    }).join(''));
 }
 
+// Filter/search changes re-run the card renderers. When the markup they
+// produce is identical to what is already in the grid (same visible set, same
+// state), skip the innerHTML rebuild: it saves layout work on small Pis and
+// keeps focus and any typed branch names in place. The cache lives on the
+// element, so an HTMX swap that replaces the grid starts fresh, and it is
+// tied to the first node it produced, so any other write to the grid (empty
+// state, loading skeleton, error message) invalidates it automatically.
+function setGridHtmlIfChanged(container, html) {
+    if (container._lastRenderedHtml === html &&
+        container._lastRenderedFirst &&
+        container._lastRenderedFirst === container.firstElementChild) {
+        return false;
+    }
+    container.innerHTML = html;
+    container._lastRenderedHtml = html;
+    container._lastRenderedFirst = container.firstElementChild;
+    return true;
+}
+// Shared with the Starlark section, which lives in a separate IIFE below.
+window.__pmSetGridHtmlIfChanged = setGridHtmlIfChanged;
+
 // Set up event delegation for plugin action buttons (fallback if onclick doesn't work)
 // Only set up once per container to avoid redundant listeners, which is what
 // makes it safe to rebuild the grid's innerHTML on every keystroke.
@@ -1875,11 +1891,73 @@ function loadOnDemandStatus(fromRefreshButton = false) {
         });
 }
 
+// The 15s on-demand status poll only runs while someone can see it: the page
+// is visible and the Plugin Manager tab is the active one. On a Pi Zero 2 W a
+// forgotten background tab should cost nothing. When it becomes visible again
+// it refreshes immediately, then resumes the interval.
+const ON_DEMAND_POLL_MS = 15000;
+
+function isPluginManagerTabVisible() {
+    if (document.hidden) return false;
+    try {
+        if (window.Alpine && typeof window.Alpine.$data === 'function') {
+            const data = window.Alpine.$data(document.body);
+            if (data && typeof data.activeTab === 'string') {
+                return data.activeTab === 'plugins';
+            }
+        }
+    } catch (e) {
+        // Alpine not initialised on body yet; fall through to the DOM check.
+    }
+    const content = document.getElementById('plugins-content');
+    return !!(content && content.offsetParent !== null);
+}
+
+function syncOnDemandStatusPolling() {
+    const shouldRun = isPluginManagerTabVisible();
+    if (shouldRun && !onDemandStatusInterval) {
+        loadOnDemandStatus(false);
+        onDemandStatusInterval = setInterval(() => {
+            if (!isPluginManagerTabVisible()) {
+                clearInterval(onDemandStatusInterval);
+                onDemandStatusInterval = null;
+                return;
+            }
+            loadOnDemandStatus(false);
+        }, ON_DEMAND_POLL_MS);
+    } else if (!shouldRun && onDemandStatusInterval) {
+        clearInterval(onDemandStatusInterval);
+        onDemandStatusInterval = null;
+    }
+}
+
 function startOnDemandStatusPolling() {
     if (onDemandStatusInterval) {
         clearInterval(onDemandStatusInterval);
+        onDemandStatusInterval = null;
+    }
+    // The caller has just loaded status, so start the interval without a
+    // second immediate fetch; later resumes go through syncOnDemandStatusPolling.
+    if (isPluginManagerTabVisible()) {
+        onDemandStatusInterval = setInterval(() => {
+            if (!isPluginManagerTabVisible()) {
+                clearInterval(onDemandStatusInterval);
+                onDemandStatusInterval = null;
+                return;
+            }
+            loadOnDemandStatus(false);
+        }, ON_DEMAND_POLL_MS);
+    }
+
+    if (!window.__onDemandPollingListenersBound) {
+        window.__onDemandPollingListenersBound = true;
+        document.addEventListener('visibilitychange', syncOnDemandStatusPolling);
+        // Tab switches: nav clicks change Alpine's activeTab, and HTMX swaps
+        // tab content in. Defer so Alpine has applied x-show first.
+        document.addEventListener('click', () => setTimeout(syncOnDemandStatusPolling, 0));
+        document.addEventListener('htmx:afterSettle', syncOnDemandStatusPolling);
+        window.addEventListener('popstate', () => setTimeout(syncOnDemandStatusPolling, 0));
     }
-    onDemandStatusInterval = setInterval(() => loadOnDemandStatus(false), 15000);
 }
 
 window.loadOnDemandStatus = loadOnDemandStatus;
@@ -2105,6 +2183,17 @@ window.__openOnDemandModalImpl = function(pluginId) {
         modalContent.style.overflowY = 'auto';
     }
 
+    // Dialog semantics, focus trap, Escape, and focus return. Opening again
+    // while already open (e.g. a double click) keeps the existing trap so
+    // focus still returns to the control that first opened it.
+    if (modalContent && window.LEDDialog && !onDemandDialogRelease) {
+        onDemandDialogRelease = window.LEDDialog.trap(modalContent, {
+            labelledBy: 'on-demand-modal-title',
+            initialFocus: modeSelect,
+            onEscape: closeOnDemandModal
+        });
+    }
+
     // Scroll to top of page to ensure modal is visible
     window.scrollTo({ top: 0, behavior: 'smooth' });
 
@@ -2132,12 +2221,21 @@ window.__openOnDemandModalImpl = function(pluginId) {
 // Replace the stub with the real implementation
 window.openOnDemandModal = window.__openOnDemandModalImpl;
 
+// Release handle for the on-demand modal's focus trap (window.LEDDialog).
+// Every close path funnels through closeOnDemandModal, which releases it once.
+let onDemandDialogRelease = null;
+
 function closeOnDemandModal() {
     const modal = document.getElementById('on-demand-modal');
     if (modal) {
         modal.style.display = 'none';
     }
     currentOnDemandPluginId = null;
+    if (onDemandDialogRelease) {
+        const release = onDemandDialogRelease;
+        onDemandDialogRelease = null;
+        release();
+    }
 }
 
 function submitOnDemandRequest(event) {
@@ -2366,7 +2464,7 @@ function renderArrayObjectItem(fieldId, fullKey, itemProperties, itemValue, inde
             if (logoValue.path) {
                 html += `
                     <div class="mt-2 flex items-center space-x-2 uploaded-image-container">
-                        <img src="/${escapeAttribute(logoValue.path.replace(/^\/+/, ''))}" alt="Logo" class="w-16 h-16 object-cover rounded border">
+                        <img src="/${escapeAttribute(logoValue.path.replace(/^\/+/, ''))}" alt="Logo" loading="lazy" decoding="async" class="w-16 h-16 object-cover rounded border">
                         <button type="button"
                                 onclick="removeArrayObjectFile('${escapeAttribute(fieldId)}', ${index}, '${escapeAttribute(propKey)}')"
                                 class="text-red-600 hover:text-red-800">
@@ -2817,7 +2915,7 @@ window.handleArrayObjectFileUpload = async function(event, fieldId, itemIndex, p
             // Get current item index from data-index attribute for remove button
             const currentItemIndex = itemEl.getAttribute('data-index') || itemIndex;
             imageContainer.innerHTML = `
-                <img src="/${escapedPath}" alt="Logo" class="w-16 h-16 object-cover rounded border">
+                <img src="/${escapedPath}" alt="Logo" loading="lazy" decoding="async" class="w-16 h-16 object-cover rounded border">
                 <button type="button"
                         onclick="removeArrayObjectFile('${escapedFieldId}', ${currentItemIndex}, '${escapedPropKey}')"
                         class="text-red-600 hover:text-red-800">
@@ -3666,7 +3764,7 @@ function getStoreFilter() {
         search: {
             el: 'plugin-search',
             fields: ['name', 'description', 'author', 'id', 'category', 'tags'],
-            debounceMs: 300,
+            debounceMs: 150,
         },
         sort: {
             el: 'store-sort',
@@ -3781,7 +3879,7 @@ function renderPluginStore(plugins) {
         return JSON.stringify(text || '');
     };
 
-    container.innerHTML = plugins.map(plugin => {
+    setGridHtmlIfChanged(container, plugins.map(plugin => {
         const installed = isStorePluginInstalled(plugin);
         return `
         <div class="plugin-card">
@@ -3830,7 +3928,7 @@ function renderPluginStore(plugins) {
                 </div>
             </div>
         </div>`;
-    }).join('');
+    }).join(''));
 }
 
 // Expose functions to window for onclick handlers
@@ -4004,8 +4102,8 @@ function renderSavedRepositories(repositories) {
                     </div>
                     <p class="text-xs text-gray-500 truncate" title="${escapeAttribute(repoUrl)}">${escapeHtml(repoUrl)}</p>
                 </div>
-                <button onclick='if(window.removeSavedRepository){window.removeSavedRepository(${escapeJs(repoUrl)})}else{console.error("removeSavedRepository not available")}' class="ml-2 text-red-600 hover:text-red-800 text-xs px-2 py-1" title="Remove repository">
-                    <i class="fas fa-trash"></i>
+                <button onclick='if(window.removeSavedRepository){window.removeSavedRepository(${escapeJs(repoUrl)})}else{console.error("removeSavedRepository not available")}' class="ml-2 text-red-600 hover:text-red-800 text-xs px-2 py-1" title="Remove repository" aria-label="Remove saved repository ${escapeAttribute(repoName)}">
+                    <i class="fas fa-trash" aria-hidden="true"></i>
                 </button>
             </div>
         `;
@@ -4603,14 +4701,17 @@ window.toggleGithubTokenVisibility = function() {
     const icon = document.getElementById('github-token-icon');
 
     if (input && icon) {
+        const btn = icon.closest('button');
         if (input.type === 'password') {
             input.type = 'text';
             icon.classList.remove('fa-eye');
             icon.classList.add('fa-eye-slash');
+            if (btn) btn.setAttribute('aria-label', 'Hide token');
         } else {
             input.type = 'password';
             icon.classList.remove('fa-eye-slash');
             icon.classList.add('fa-eye');
+            if (btn) btn.setAttribute('aria-label', 'Show token');
         }
     }
 }
@@ -4989,6 +5090,7 @@ window.updateImageList = function(fieldId, images) {
                     <div class="flex items-center space-x-3 flex-1">
                         <img src="/${img.path || ''}"
                              alt="${img.filename || ''}"
+                             loading="lazy" decoding="async"
                              class="w-16 h-16 object-cover rounded"
                              onerror="this.style.display='none'; this.nextElementSibling.style.display='block';">
                         <div style="display:none;" class="w-16 h-16 bg-gray-200 rounded flex items-center justify-center">
@@ -5006,14 +5108,16 @@ window.updateImageList = function(fieldId, images) {
                         <button type="button"
                                 onclick="window.openImageSchedule('${fieldId}', '${img.id}', ${idx})"
                                 class="text-blue-600 hover:text-blue-800 p-2"
-                                title="Schedule this image">
-                            <i class="fas fa-calendar-alt"></i>
+                                title="Schedule this image"
+                                aria-label="Schedule image ${escapeAttribute(img.original_filename || img.filename || '')}">
+                            <i class="fas fa-calendar-alt" aria-hidden="true"></i>
                         </button>
                         <button type="button"
                                 onclick="window.deleteUploadedImage('${fieldId}', '${img.id}', '${pluginId}')"
                                 class="text-red-600 hover:text-red-800 p-2"
-                                title="Delete image">
-                            <i class="fas fa-trash"></i>
+                                title="Delete image"
+                                aria-label="Delete image ${escapeAttribute(img.original_filename || img.filename || '')}">
+                            <i class="fas fa-trash" aria-hidden="true"></i>
                         </button>
                     </div>
                 </div>
@@ -5137,7 +5241,7 @@ window.openImageSchedule = function(fieldId, imageId, imageIdx) {
             <!-- Schedule Mode -->
             <div id="schedule_options_${imageId}" class="space-y-4" style="display: ${schedule.enabled ? 'block' : 'none'};">
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 mb-2">Schedule Type</label>
+                    <label for="schedule_mode_${imageId}" class="block text-sm font-medium text-gray-700 mb-2">Schedule Type</label>
                     <select id="schedule_mode_${imageId}"
                             onchange="window.updateImageScheduleMode('${fieldId}', '${imageId}', ${imageIdx})"
                             class="block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm">
@@ -5150,7 +5254,7 @@ window.openImageSchedule = function(fieldId, imageId, imageIdx) {
                 <!-- Time Range Mode -->
                 <div id="time_range_${imageId}" class="grid grid-cols-2 gap-4" style="display: ${schedule.mode === 'time_range' ? 'grid' : 'none'};">
                     <div>
-                        <label class="block text-xs font-medium text-gray-700 mb-1">Start Time</label>
+                        <label for="schedule_start_${imageId}" class="block text-xs font-medium text-gray-700 mb-1">Start Time</label>
                         <input type="time"
                                id="schedule_start_${imageId}"
                                value="${schedule.start_time || '08:00'}"
@@ -5158,7 +5262,7 @@ window.openImageSchedule = function(fieldId, imageId, imageIdx) {
                                class="block w-full px-2 py-1 text-sm border border-gray-300 rounded-md">
                     </div>
                     <div>
-                        <label class="block text-xs font-medium text-gray-700 mb-1">End Time</label>
+                        <label for="schedule_end_${imageId}" class="block text-xs font-medium text-gray-700 mb-1">End Time</label>
                         <input type="time"
                                id="schedule_end_${imageId}"
                                value="${schedule.end_time || '18:00'}"
@@ -5188,12 +5292,14 @@ window.openImageSchedule = function(fieldId, imageId, imageIdx) {
                                 <div class="grid grid-cols-2 gap-2 ml-5" id="day_times_${day}_${imageId}" style="display: ${dayConfig.enabled ? 'grid' : 'none'};">
                                     <input type="time"
                                            id="day_${day}_start_${imageId}"
+                                           aria-label="${day} start time"
                                            value="${dayConfig.start_time || '08:00'}"
                                            onchange="updateImageScheduleDay('${fieldId}', '${imageId}', ${imageIdx}, '${day}')"
                                            class="text-xs px-2 py-1 border border-gray-300 rounded"
                                            ${!dayConfig.enabled ? 'disabled' : ''}>
                                     <input type="time"
                                            id="day_${day}_end_${imageId}"
+                                           aria-label="${day} end time"
                                            value="${dayConfig.end_time || '18:00'}"
                                            onchange="updateImageScheduleDay('${fieldId}', '${imageId}', ${imageIdx}, '${day}')"
                                            class="text-xs px-2 py-1 border border-gray-300 rounded"
@@ -5375,12 +5481,12 @@ if (typeof window !== 'undefined') {
                 if (propSchema.type === 'boolean') {
                     const checked = propValue ? 'checked' : '';
                     // No name attribute - rely solely on _data field to prevent key leakage
-                    itemHtml += `<input type="checkbox" data-prop-key="${propKey}" ${checked} class="h-4 w-4 text-blue-600" onchange="window.updateArrayObjectData('${fieldId}')">`;
+                    itemHtml += `<input type="checkbox" data-prop-key="${propKey}" aria-label="${escapeHtml(propLabel)}" ${checked} class="h-4 w-4 text-blue-600" onchange="window.updateArrayObjectData('${fieldId}')">`;
                 } else {
                     // Escape HTML to prevent XSS
                     // No name attribute - rely solely on _data field to prevent key leakage
                     const escapedValue = typeof propValue === 'string' ? propValue.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#39;') : (propValue || '');
-                    itemHtml += `<input type="text" data-prop-key="${propKey}" value="${escapedValue}" class="block w-full px-3 py-2 border border-gray-300 rounded-md" onchange="window.updateArrayObjectData('${fieldId}')">`;
+                    itemHtml += `<input type="text" data-prop-key="${propKey}" aria-label="${escapeHtml(propLabel)}" value="${escapedValue}" class="block w-full px-3 py-2 border border-gray-300 rounded-md" onchange="window.updateArrayObjectData('${fieldId}')">`;
                 }
                 itemHtml += `</div>`;
             });
@@ -5823,7 +5929,7 @@ document.addEventListener('htmx:afterSettle', function() {
             search: {
                 el: 'starlark-search',
                 fields: ['name', 'summary', 'desc', 'author', 'id', 'category'],
-                debounceMs: 300,
+                debounceMs: 150,
             },
             sort: {
                 el: 'starlark-sort',
@@ -5902,7 +6008,9 @@ document.addEventListener('htmx:afterSettle', function() {
             return;
         }
 
-        grid.innerHTML = apps.map(app => {
+        const setGridHtmlIfChanged = window.__pmSetGridHtmlIfChanged ||
+            ((el, html) => { el.innerHTML = html; return true; });
+        setGridHtmlIfChanged(grid, apps.map(app => {
             const installed = isStarlarkInstalled(app.id);
             return `
             <div class="plugin-card" data-app-id="${escapeHtml(app.id)}">
@@ -5932,7 +6040,7 @@ document.addEventListener('htmx:afterSettle', function() {
                     </button>
                 </div>
             </div>`;
-        }).join('');
+        }).join(''));
 
         // Add delegated event listener only once (prevent duplicate handlers)
         if (!grid.dataset.starlarkHandlerAttached) {
diff --git a/web_interface/templates/v3/base.html b/web_interface/templates/v3/base.html
index eb23905b..81556ad2 100644
--- a/web_interface/templates/v3/base.html
+++ b/web_interface/templates/v3/base.html
@@ -204,7 +204,7 @@
                         clearTimeout(timeout);
                         console.error('Failed to load plugins:', err);
                         content.removeAttribute('data-loaded');
-                        content.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4"><p class="text-red-800">Failed to load Plugin Manager. Please refresh the page.</p></div>';
+                        content.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4" role="alert"><p class="text-red-800">Couldn’t load the Plugin Manager. Check that the device is still reachable, then try again.</p><button type="button" onclick="loadPluginsDirect()" class="mt-3 px-3 py-1.5 text-sm font-medium bg-red-600 hover:bg-red-700 text-white rounded-md">Try again</button></div>';
                     });
             }
         }
@@ -229,6 +229,11 @@
          after DOM parse but before DOMContentLoaded, which is exactly what
          Alpine wants — so no deferLoadingAlpine gymnastics are needed.
          The inline rescue below only fires if the local file is missing. -->
+    <!-- App shell (full app(), Alpine stores, SSE streams). Deferred so it
+         doesn't block rendering, and placed before Alpine: deferred scripts run
+         in document order, and its alpine:init listener must be registered
+         before Alpine starts. -->
+    <script defer src="{{ url_for('static', filename='v3/js/app-shell.js') }}"></script>
     <script defer src="{{ url_for('static', filename='v3/js/alpinejs.min.js') }}"></script>
     <script>
         // Rescue: if the local Alpine didn't load for any reason, pull the CDN
@@ -238,7 +243,7 @@
             if (typeof window.Alpine === 'undefined') {
                 console.warn('[Alpine] Local file failed to load, falling back to CDN');
                 const s = document.createElement('script');
-                s.src = 'https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js';
+                s.src = 'https://unpkg.com/alpinejs@3.13.5/dist/cdn.min.js';
                 document.head.appendChild(s);
             }
         });
@@ -291,11 +296,12 @@
     <link rel="stylesheet" href="{{ url_for('static', filename='v3/app.css') }}">
 </head>
 <body x-data="app()" class="bg-gray-50 min-h-screen">
+    <a href="#tab-content" class="skip-link">Skip to main content</a>
     <!-- Header -->
     <header class="bg-white shadow-md border-b border-gray-200">
         <div class="mx-auto px-4 sm:px-6 lg:px-8 xl:px-12 2xl:px-16" style="max-width: 100%;">
             <div class="flex justify-between items-center h-16">
-                <div class="flex items-center">
+                <div class="flex items-center min-w-0">
                     <!-- Mobile nav toggle (hamburger) — hidden at md and up -->
                     <button type="button"
                             class="theme-toggle-btn p-2 rounded-md mr-2 md:hidden"
@@ -307,14 +313,13 @@
                             title="Menu">
                         <i class="fas fa-bars" aria-hidden="true"></i>
                     </button>
-                    <h1 class="text-xl font-bold text-gray-900">
-                        <i class="fas fa-tv text-blue-600 mr-2"></i>
-                        LED Matrix Control
+                    <h1 class="text-lg sm:text-xl font-bold text-gray-900 truncate">
+                        <i class="fas fa-tv text-blue-600 mr-2" aria-hidden="true"></i>LED Matrix Control
                     </h1>
                 </div>
 
                 <!-- Connection status and theme toggle -->
-                <div id="header-widgets" class="flex items-center space-x-4">
+                <div id="header-widgets" class="flex items-center flex-shrink-0 ml-2 space-x-4">
                     <!-- Global settings search -->
                     <div class="relative hidden sm:block" id="settings-search-wrap">
                         <input id="settings-search"
@@ -353,20 +358,20 @@
 
                     <!-- System stats (populated via SSE) -->
                     <div id="system-stats" class="hidden lg:flex items-center space-x-4 text-sm text-gray-600 xl:space-x-6 2xl:space-x-8">
-                        <span id="cpu-stat" class="flex items-center space-x-1">
-                            <i class="fas fa-microchip"></i>
+                        <span id="cpu-stat" class="flex items-center space-x-1" title="CPU usage">
+                            <i class="fas fa-microchip" aria-hidden="true"></i>
                             <span>--%</span>
                         </span>
-                        <span id="memory-stat" class="flex items-center space-x-1">
-                            <i class="fas fa-memory"></i>
+                        <span id="memory-stat" class="flex items-center space-x-1" title="Memory usage">
+                            <i class="fas fa-memory" aria-hidden="true"></i>
                             <span>--%</span>
                         </span>
-                        <span id="temp-stat" class="flex items-center space-x-1">
-                            <i class="fas fa-thermometer-half"></i>
+                        <span id="temp-stat" class="flex items-center space-x-1" title="CPU temperature">
+                            <i class="fas fa-thermometer-half" aria-hidden="true"></i>
                             <span>--°C</span>
                         </span>
                         <span id="power-stat" class="hidden items-center space-x-1" title="">
-                            <i class="fas fa-bolt"></i>
+                            <i class="fas fa-bolt" aria-hidden="true"></i>
                             <span>Power</span>
                         </span>
                     </div>
@@ -381,7 +386,7 @@
         <div class="mx-auto px-4 sm:px-6 lg:px-8 xl:px-12 2xl:px-16 py-2" style="max-width:100%">
             <div class="flex items-center justify-between">
                 <div class="flex items-center space-x-3">
-                    <i class="fas fa-arrow-circle-up text-lg"></i>
+                    <i class="fas fa-arrow-circle-up text-lg" aria-hidden="true"></i>
                     <span class="text-sm font-medium" id="update-banner-text"
                           aria-live="polite" aria-atomic="true">
                         A new LEDMatrix update is available
@@ -391,12 +396,12 @@
                     <button onclick="applyUpdate()" id="update-banner-btn"
                             class="inline-flex items-center px-3 py-1 text-xs font-semibold rounded-md
                                    update-banner-action transition-colors duration-150">
-                        <i class="fas fa-download mr-1"></i> Update Now
+                        <i class="fas fa-download mr-1" aria-hidden="true"></i> Update Now
                     </button>
                     <button type="button" onclick="dismissUpdateBanner()"
                             class="update-banner-dismiss rounded p-1 transition-colors duration-150"
                             title="Dismiss" aria-label="Dismiss update">
-                        <i class="fas fa-times text-sm"></i>
+                        <i class="fas fa-times text-sm" aria-hidden="true"></i>
                     </button>
                 </div>
             </div>
@@ -412,7 +417,7 @@
         <div class="mx-auto px-4 sm:px-6 lg:px-8 xl:px-12 2xl:px-16 py-2" style="max-width:100%">
             <div class="flex items-center justify-between">
                 <div class="flex items-center space-x-3">
-                    <i class="fas fa-rotate text-lg"></i>
+                    <i class="fas fa-rotate text-lg" aria-hidden="true"></i>
                     <span class="text-sm font-medium" aria-live="polite"
                           id="restart-pending-text">
                         Configuration saved &mdash; restart the display to apply the changes
@@ -422,12 +427,12 @@
                     <button onclick="window.restartPendingNow()" id="restart-pending-btn"
                             class="inline-flex items-center px-3 py-1 text-xs font-semibold rounded-md
                                    update-banner-action transition-colors duration-150">
-                        <i class="fas fa-power-off mr-1"></i> Restart Now
+                        <i class="fas fa-power-off mr-1" aria-hidden="true"></i> Restart Now
                     </button>
                     <button type="button" onclick="window.dismissRestartPending()"
                             class="update-banner-dismiss rounded p-1 transition-colors duration-150"
                             title="Dismiss" aria-label="Dismiss restart reminder">
-                        <i class="fas fa-times text-sm"></i>
+                        <i class="fas fa-times text-sm" aria-hidden="true"></i>
                     </button>
                 </div>
             </div>
@@ -440,7 +445,7 @@
         <div class="mx-auto px-4 sm:px-6 lg:px-8 xl:px-12 2xl:px-16 py-2" style="max-width:100%">
             <div class="flex items-center justify-between">
                 <div class="flex items-center space-x-3">
-                    <i class="fas fa-exclamation-triangle text-lg"></i>
+                    <i class="fas fa-exclamation-triangle text-lg" aria-hidden="true"></i>
                     <span class="text-sm font-medium" id="power-warning-banner-text"
                           aria-live="polite" aria-atomic="true">
                         A power/thermal issue detected right now — the display may flicker or degrade. Check your power supply and cooling.
@@ -449,7 +454,7 @@
                 <button type="button" onclick="dismissPowerWarningBanner()"
                         class="power-warning-banner-dismiss rounded p-1 transition-colors duration-150"
                         title="Dismiss" aria-label="Dismiss power warning">
-                    <i class="fas fa-times text-sm"></i>
+                    <i class="fas fa-times text-sm" aria-hidden="true"></i>
                 </button>
             </div>
         </div>
@@ -471,90 +476,90 @@
             <div id="drawer-widgets"></div>
 
         <!-- Navigation tabs -->
-        <nav class="mb-8">
+        <div class="mb-8">
             <!-- First row - System tabs -->
             <div class="border-b border-gray-200 mb-4">
-                <nav class="-mb-px flex flex-wrap gap-y-2 gap-x-2 lg:gap-x-3 xl:gap-x-4">
+                <nav aria-label="System settings" class="-mb-px flex flex-wrap gap-y-2 gap-x-2 lg:gap-x-3 xl:gap-x-4">
                     <button @click="activeTab = 'overview'"
                             :class="activeTab === 'overview' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-tachometer-alt"></i>Overview
+                        <i class="fas fa-tachometer-alt" aria-hidden="true"></i>Overview
                     </button>
                     <button @click="activeTab = 'general'"
                             :class="activeTab === 'general' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-sliders-h"></i>General
+                        <i class="fas fa-sliders-h" aria-hidden="true"></i>General
                     </button>
                     <button @click="activeTab = 'wifi'"
                             :class="activeTab === 'wifi' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-wifi"></i>WiFi
+                        <i class="fas fa-wifi" aria-hidden="true"></i>WiFi
                     </button>
                     <button @click="activeTab = 'schedule'"
                             :class="activeTab === 'schedule' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-clock"></i>Schedule
+                        <i class="fas fa-clock" aria-hidden="true"></i>Schedule
                     </button>
                     <button @click="activeTab = 'display'"
                             :class="activeTab === 'display' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-desktop"></i>Display
+                        <i class="fas fa-desktop" aria-hidden="true"></i>Display
                     </button>
                     <button @click="activeTab = 'durations'"
                             :class="activeTab === 'durations' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-rotate"></i>Rotation
+                        <i class="fas fa-rotate" aria-hidden="true"></i>Rotation
                     </button>
                     <button @click="activeTab = 'config-editor'"
                             :class="activeTab === 'config-editor' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-file-code"></i>Config Editor
+                        <i class="fas fa-file-code" aria-hidden="true"></i>Config Editor
                     </button>
                     <button @click="activeTab = 'backup-restore'"
                             :class="activeTab === 'backup-restore' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-save"></i>Backup &amp; Restore
+                        <i class="fas fa-save" aria-hidden="true"></i>Backup &amp; Restore
                     </button>
                     <button @click="activeTab = 'fonts'"
                             :class="activeTab === 'fonts' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-font"></i>Fonts
+                        <i class="fas fa-font" aria-hidden="true"></i>Fonts
                     </button>
                     <button @click="activeTab = 'logs'"
                             :class="activeTab === 'logs' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-file-alt"></i>Logs
+                        <i class="fas fa-file-alt" aria-hidden="true"></i>Logs
                     </button>
                     <button @click="activeTab = 'cache'"
                             :class="activeTab === 'cache' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-database"></i>Cache
+                        <i class="fas fa-database" aria-hidden="true"></i>Cache
                     </button>
                     <button @click="activeTab = 'operation-history'"
                             :class="activeTab === 'operation-history' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-history"></i>Operation History
+                        <i class="fas fa-history" aria-hidden="true"></i>Operation History
                     </button>
                     <button @click="activeTab = 'tools'"
                             :class="activeTab === 'tools' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-tools"></i>Tools
+                        <i class="fas fa-tools" aria-hidden="true"></i>Tools
                     </button>
                 </nav>
             </div>
 
             <!-- Second row - Plugin tabs (populated dynamically) -->
             <div id="plugin-tabs-row" class="border-b border-gray-200">
-                <nav class="-mb-px flex flex-wrap gap-y-2 gap-x-2 lg:gap-x-3 xl:gap-x-4">
+                <nav aria-label="Plugins" class="-mb-px flex flex-wrap gap-y-2 gap-x-2 lg:gap-x-3 xl:gap-x-4">
                     <button @click="activeTab = 'plugins'; if (typeof htmx === 'undefined') { $nextTick(() => loadPluginsDirect()); }"
                             :class="activeTab === 'plugins' ? 'nav-tab-active' : ''"
                             class="nav-tab">
-                        <i class="fas fa-plug"></i>Plugin Manager
+                        <i class="fas fa-plug" aria-hidden="true"></i>Plugin Manager
                     </button>
                     <!-- Installed plugin tabs will be added here dynamically -->
                 </nav>
             </div>
-        </nav>
+        </div>
         </div> <!-- /#site-nav -->
 
         <!-- Floating mini display preview: available on every tab except
@@ -563,16 +568,16 @@
              persists in localStorage. -->
         <div id="floating-preview" class="floating-preview" style="display:none">
             <div class="flex items-center justify-between px-2 py-1">
-                <span class="text-xs text-gray-300"><i class="fas fa-tv mr-1"></i>Live Preview</span>
+                <span class="text-xs text-gray-300"><i class="fas fa-tv mr-1" aria-hidden="true"></i>Live Preview</span>
                 <span class="flex items-center">
                     <button type="button" onclick="window.cycleFloatingPreviewSize()"
                             class="text-gray-400 hover:text-white ml-2" aria-label="Cycle preview size"
                             title="Cycle preview size (drag the corner to resize on desktop)">
-                        <i class="fas fa-up-right-and-down-left-from-center text-xs"></i>
+                        <i class="fas fa-up-right-and-down-left-from-center text-xs" aria-hidden="true"></i>
                     </button>
                     <button type="button" onclick="window.toggleFloatingPreview(false)"
                             class="text-gray-400 hover:text-white ml-2" aria-label="Close live preview">
-                        <i class="fas fa-times text-xs"></i>
+                        <i class="fas fa-times text-xs" aria-hidden="true"></i>
                     </button>
                 </span>
             </div>
@@ -582,12 +587,12 @@
         <button id="floating-preview-toggle" type="button" onclick="window.toggleFloatingPreview(true)"
                 class="floating-preview-toggle" style="display:none"
                 title="Show live display preview" aria-label="Show live display preview">
-            <i class="fas fa-tv"></i>
+            <i class="fas fa-tv" aria-hidden="true"></i>
         </button>
 
 
         <!-- Tab content -->
-        <div id="tab-content" class="space-y-6">
+        <div id="tab-content" class="space-y-6" tabindex="-1">
             <!-- Overview tab -->
             <div x-show="activeTab === 'overview'" x-transition>
                 <div id="overview-content" hx-get="/v3/partials/overview" hx-trigger="loadtab" hx-swap="innerHTML" hx-on::htmx:response-error="loadOverviewDirect()">
@@ -606,7 +611,10 @@
                     const overviewContent = document.getElementById('overview-content');
                     if (overviewContent && !overviewContent.hasAttribute('data-loaded')) {
                         fetch('/v3/partials/overview')
-                            .then(response => response.text())
+                            .then(response => {
+                                if (!response.ok) throw new Error(response.status + ' ' + response.statusText);
+                                return response.text();
+                            })
                             .then(html => {
                                 overviewContent.innerHTML = html;
                                 overviewContent.setAttribute('data-loaded', 'true');
@@ -620,7 +628,7 @@
                             })
                             .catch(err => {
                                 console.error('Failed to load overview content:', err);
-                                overviewContent.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4"><p class="text-red-800">Failed to load overview page. Please refresh the page.</p></div>';
+                                overviewContent.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4" role="alert"><p class="text-red-800">Couldn’t load the Overview. Check that the device is still reachable, then try again.</p><button type="button" onclick="loadOverviewDirect()" class="mt-3 px-3 py-1.5 text-sm font-medium bg-red-600 hover:bg-red-700 text-white rounded-md">Try again</button></div>';
                             });
                     }
                 }
@@ -698,7 +706,10 @@
                     const wifiContent = document.getElementById('wifi-content');
                     if (wifiContent && !wifiContent.hasAttribute('data-loaded')) {
                         fetch('/v3/partials/wifi')
-                            .then(response => response.text())
+                            .then(response => {
+                                if (!response.ok) throw new Error(response.status + ' ' + response.statusText);
+                                return response.text();
+                            })
                             .then(html => {
                                 wifiContent.innerHTML = html;
                                 wifiContent.setAttribute('data-loaded', 'true');
@@ -709,7 +720,7 @@
                             })
                             .catch(err => {
                                 console.error('Failed to load WiFi content:', err);
-                                wifiContent.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4"><p class="text-red-800">Failed to load WiFi setup page. Please refresh the page.</p></div>';
+                                wifiContent.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4" role="alert"><p class="text-red-800">Couldn’t load WiFi setup. Check that the device is still reachable, then try again.</p><button type="button" onclick="loadWifiDirect()" class="mt-3 px-3 py-1.5 text-sm font-medium bg-red-600 hover:bg-red-700 text-white rounded-md">Try again</button></div>';
                             });
                     }
                 }
@@ -952,9 +963,6 @@
     <!-- Notifications -->
     <div id="notifications" class="fixed top-4 right-4 z-50 space-y-2"></div>
 
-    <!-- SSE connection for real-time updates -->
-    <script src="{{ url_for('static', filename='v3/js/app-shell.js') }}"></script>
-
     <!-- Custom v3 JavaScript -->
     <script src="{{ url_for('static', filename='v3/app.js') }}" defer></script>
 
@@ -964,6 +972,7 @@
 
     <!-- Modular Plugin Management JavaScript -->
     <!-- Load utilities first -->
+    <script src="{{ url_for('static', filename='v3/js/utils/dialog.js') }}" defer></script>
     <script src="{{ url_for('static', filename='v3/js/utils/error_handler.js') }}" defer></script>
     
     <!-- Load core API client first (used by other modules) -->
@@ -979,43 +988,10 @@
     <!-- Load config utilities -->
     <script src="{{ url_for('static', filename='v3/js/config/diff_viewer.js') }}" defer></script>
     
-    <!-- Widget Registry System -->
-    <script src="{{ url_for('static', filename='v3/js/widgets/registry.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/base-widget.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/notification.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/plugin-order-list.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/file-upload.js') }}?v=20260307" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/checkbox-group.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/custom-feeds.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/array-table.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/google-calendar-picker.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/google-oauth.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/day-selector.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/time-range.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/time-picker.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/file-upload-single.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/plugin-file-manager.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/schedule-picker.js') }}" defer></script>
-    <!-- Basic input widgets -->
-    <script src="{{ url_for('static', filename='v3/js/widgets/text-input.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/number-input.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/textarea.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/select-dropdown.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/font-selector.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/style-editor.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/toggle-switch.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/radio-group.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/date-picker.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/slider.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/color-picker.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/email-input.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/url-input.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/password-input.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/timezone-selector.js') }}" defer></script>
-    <script src="{{ url_for('static', filename='v3/js/widgets/plugin-loader.js') }}" defer></script>
-    
-    <!-- Reusable JSON file manager widget (used by of-the-day and others via x-widget: json-file-manager) -->
-    <script src="{{ url_for('static', filename='v3/js/widgets/json-file-manager.js') }}" defer></script>
+    <!-- Widget Registry System: all widget scripts in one request (see
+         web_interface/widget_bundle.py). The individual files stay served at
+         their own URLs for plugin-loader.js and debugging. -->
+    <script src="{{ widgets_bundle_url() }}" defer></script>
 
     <!-- plugins_manager.js: loaded LAST on purpose — it defines the live
          window.* implementations for several plugin actions (installPlugin,
@@ -1030,17 +1006,17 @@
     
     <!-- On-Demand Modal (moved here from plugins.html so it's always available) -->
     <div id="on-demand-modal" class="fixed inset-0 modal-backdrop flex items-center justify-center z-50" style="display: none;">
-        <div class="modal-content p-6 w-full max-w-md bg-white rounded-lg shadow-lg">
+        <div class="modal-content p-6 w-full max-w-md bg-white rounded-lg shadow-lg" role="dialog" aria-modal="true" aria-labelledby="on-demand-modal-title">
             <div class="flex justify-between items-center mb-4">
-                <h3 id="on-demand-modal-title" class="text-lg font-semibold">Run Plugin On-Demand</h3>
-                <button id="close-on-demand-modal" class="text-gray-400 hover:text-gray-600">
-                    <i class="fas fa-times"></i>
+                <h2 id="on-demand-modal-title" class="text-lg font-semibold">Run Plugin On-Demand</h2>
+                <button type="button" id="close-on-demand-modal" class="text-gray-500 hover:text-gray-700 p-2 -m-2 rounded-md" aria-label="Close">
+                    <i class="fas fa-times" aria-hidden="true"></i>
                 </button>
             </div>
             <!-- Service Status Alert -->
             <div id="on-demand-service-warning" class="hidden mb-4 p-3 bg-yellow-50 border border-yellow-200 rounded-md">
                 <div class="flex items-start">
-                    <i class="fas fa-exclamation-triangle text-yellow-600 mt-0.5 mr-2"></i>
+                    <i class="fas fa-exclamation-triangle text-yellow-600 mt-0.5 mr-2" aria-hidden="true"></i>
                     <div class="flex-1">
                         <p class="text-sm font-medium text-yellow-800">Display service is not running</p>
                         <p class="text-xs text-yellow-700 mt-1">
@@ -1148,8 +1124,8 @@
 
     window.applyUpdate = function() {
         var btn = document.getElementById('update-banner-btn');
-        var originalHTML = '<i class="fas fa-download mr-1"></i> Update Now';
-        btn.innerHTML = '<i class="fas fa-spinner fa-spin mr-1"></i> Updating...';
+        var originalHTML = '<i class="fas fa-download mr-1" aria-hidden="true"></i> Update Now';
+        btn.innerHTML = '<i class="fas fa-spinner fa-spin mr-1" aria-hidden="true"></i> Updating...';
         btn.disabled = true;
         fetch('/api/v3/system/action', {
             method: 'POST',
@@ -1191,9 +1167,18 @@
         });
     };
 
-    // Initial check shortly after page load, then periodic
-    setTimeout(checkForUpdate, 2000);
-    setInterval(checkForUpdate, CHECK_INTERVAL);
+    // Initial check shortly after page load, then every CHECK_INTERVAL while
+    // the page is visible. A hidden tab makes no requests and catches up as
+    // soon as it is shown again.
+    var lastCheck = 0;
+    function checkIfDue() {
+        if (document.hidden || Date.now() - lastCheck < CHECK_INTERVAL) return;
+        lastCheck = Date.now();
+        checkForUpdate();
+    }
+    setTimeout(checkIfDue, 2000);
+    setInterval(checkIfDue, 60 * 1000);
+    document.addEventListener('visibilitychange', checkIfDue);
 })();
 </script>
 </body>
diff --git a/web_interface/templates/v3/captive_setup.html b/web_interface/templates/v3/captive_setup.html
index bce4cd5e..cf92deab 100644
--- a/web_interface/templates/v3/captive_setup.html
+++ b/web_interface/templates/v3/captive_setup.html
@@ -3,39 +3,48 @@
 <head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta name="color-scheme" content="light dark">
 <title>LEDMatrix WiFi Setup</title>
 <style>
+:root{--bg:#f3f4f6;--surface:#fff;--text:#1f2937;--label:#374151;--muted:#4b5563;--faint:#6b7280;--line:#e5e7eb;--field:#d1d5db;--accent:#2563eb;--accent-hover:#1d4ed8;--scan:#e5e7eb;--scan-hover:#d1d5db;--ok-bg:#d1fae5;--ok:#065f46;--err-bg:#fee2e2;--err:#991b1b;--info-bg:#dbeafe;--info:#1e40af}
+@media (prefers-color-scheme:dark){:root{--bg:#111827;--surface:#1f2937;--text:#f9fafb;--label:#d1d5db;--muted:#d1d5db;--faint:#9ca3af;--line:#374151;--field:#4b5563;--accent:#3b82f6;--accent-hover:#60a5fa;--scan:#374151;--scan-hover:#4b5563;--ok-bg:#064e3b;--ok:#6ee7b7;--err-bg:#7f1d1d;--err:#fecaca;--info-bg:#1e3a5f;--info:#bfdbfe}}
 *{box-sizing:border-box;margin:0;padding:0}
-body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:#f3f4f6;color:#1f2937;padding:16px;max-width:480px;margin:0 auto}
+body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);padding:16px;max-width:480px;margin:0 auto;line-height:1.45}
 h1{font-size:20px;margin-bottom:4px}
-.subtitle{color:#6b7280;font-size:13px;margin-bottom:20px}
-.card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 1px 3px rgba(0,0,0,.1);margin-bottom:16px}
-label{display:block;font-size:13px;font-weight:600;color:#374151;margin-bottom:6px}
-select,input[type=text],input[type=password]{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:15px;background:#fff;-webkit-appearance:none;appearance:none}
-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
-select:focus,input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.15)}
-.btn{display:block;width:100%;padding:12px;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;text-align:center;transition:background .15s}
-.btn-primary{background:#2563eb;color:#fff}.btn-primary:hover{background:#1d4ed8}
-.btn-scan{background:#e5e7eb;color:#374151}.btn-scan:hover{background:#d1d5db}
-.btn:disabled{background:#d1d5db;color:#9ca3af;cursor:not-allowed}
+.subtitle{color:var(--muted);font-size:14px;margin-bottom:20px}
+.card{background:var(--surface);border-radius:12px;padding:20px;box-shadow:0 1px 3px rgba(0,0,0,.1);margin-bottom:16px}
+label{display:block;font-size:14px;font-weight:600;color:var(--label);margin-bottom:6px}
+.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
+/* 16px inputs: iOS Safari zooms any focused field smaller than that */
+select,input[type=text],input[type=password]{width:100%;min-width:0;min-height:44px;padding:10px 12px;border:1px solid var(--field);border-radius:8px;font-size:16px;background-color:var(--surface);color:var(--text);-webkit-appearance:none;appearance:none}
+select{padding-right:32px;text-overflow:ellipsis;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
+select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
+.btn{display:block;width:100%;min-height:44px;padding:12px;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;text-align:center;transition:background-color .15s}
+.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
+.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}
+.btn-scan{background:var(--scan);color:var(--label);width:auto;padding:10px 16px;white-space:nowrap}.btn-scan:hover{background:var(--scan-hover)}
+.btn:disabled{background:var(--scan);color:var(--muted);cursor:not-allowed;opacity:.75}
 .row{display:flex;gap:8px;margin-bottom:16px}
-.row>*:first-child{flex:1}
-.msg{padding:12px;border-radius:8px;font-size:13px;margin-bottom:12px;display:none}
-.msg-ok{background:#d1fae5;color:#065f46;display:block}
-.msg-err{background:#fee2e2;color:#991b1b;display:block}
-.msg-info{background:#dbeafe;color:#1e40af;display:block}
-.step{font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}
-.sep{margin:16px 0;border:none;border-top:1px solid #e5e7eb}
-.spinner{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;vertical-align:middle;margin-right:6px}
+.row>*:first-child{flex:1;min-width:0}
+.msg{padding:12px;border-radius:8px;font-size:14px;margin-bottom:12px;display:none;overflow-wrap:anywhere}
+.msg-ok{background:var(--ok-bg);color:var(--ok);display:block}
+.msg-err{background:var(--err-bg);color:var(--err);display:block}
+.msg-info{background:var(--info-bg);color:var(--info);display:block}
+.step{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
+.spinner{display:inline-block;width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .6s linear infinite;vertical-align:-2px;margin-right:6px}
 @keyframes spin{to{transform:rotate(360deg)}}
-.footer{text-align:center;margin-top:20px;font-size:12px;color:#9ca3af}
-.footer a{color:#3b82f6;text-decoration:none}
+@media (prefers-reduced-motion:reduce){.spinner{animation-duration:1.8s}.btn{transition:none}}
+.footer{text-align:center;margin-top:20px;font-size:14px}
+.footer a{color:var(--accent);text-underline-offset:.15em;display:inline-block;padding:10px}
 .success-box{text-align:center;padding:24px}
-.success-box .icon{font-size:48px;margin-bottom:12px}
-.success-box .ip{font-size:18px;font-weight:700;color:#2563eb;word-break:break-all}
+.success-box .icon{width:48px;height:48px;margin:0 auto 12px;color:#059669}
+.success-box .title{font-size:16px;font-weight:600;margin-bottom:8px}
+.success-box .hint{font-size:14px;color:var(--muted);margin-bottom:12px}
+.success-box .note{font-size:13px;color:var(--faint);margin-top:12px}
+.success-box .ip{font-size:18px;font-weight:700;color:var(--accent);word-break:break-all}
 .hidden{display:none}
-.or-divider{text-align:center;color:#9ca3af;font-size:12px;margin:12px 0;position:relative}
-.or-divider::before,.or-divider::after{content:'';position:absolute;top:50%;width:40%;height:1px;background:#e5e7eb}
+.or-divider{text-align:center;color:var(--faint);font-size:13px;margin:12px 0;position:relative}
+.or-divider::before,.or-divider::after{content:'';position:absolute;top:50%;width:30%;height:1px;background:var(--line)}
 .or-divider::before{left:0}
 .or-divider::after{right:0}
 </style>
@@ -45,44 +54,48 @@ select:focus,input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px
 <h1>LEDMatrix WiFi Setup</h1>
 <p class="subtitle">Connect your device to a WiFi network</p>
 
-<div id="msg" class="msg"></div>
+<div id="msg" class="msg" role="status" aria-live="polite" aria-atomic="true"></div>
 
 <div id="setup-form">
   <div class="card">
-    <div class="step">Step 1 &mdash; Choose Network</div>
+    <div class="step" aria-hidden="true">Step 1 &mdash; Choose Network</div>
     <label for="net-select">Available Networks</label>
     <div class="row">
       <select id="net-select" onchange="onSelectNetwork()">
         <option value="">-- Scan to find networks --</option>
       </select>
-      <button class="btn btn-scan" id="btn-scan" onclick="doScan()" style="width:auto;padding:10px 16px">
+      <button type="button" class="btn btn-scan" id="btn-scan" onclick="doScan()">
         Scan
       </button>
     </div>
-    <div class="or-divider">or enter manually</div>
-    <input type="text" id="manual-ssid" placeholder="Network name (SSID)" oninput="onManualInput()">
+    <div class="or-divider" aria-hidden="true">or enter manually</div>
+    <label for="manual-ssid" class="sr-only">Network name (SSID), if it isn't listed</label>
+    <input type="text" id="manual-ssid" placeholder="Network name (SSID)" maxlength="32"
+           autocomplete="off" autocapitalize="off" spellcheck="false" oninput="onManualInput()">
   </div>
 
   <div class="card">
-    <div class="step">Step 2 &mdash; Password</div>
+    <div class="step" aria-hidden="true">Step 2 &mdash; Password</div>
     <label for="password">WiFi Password</label>
-    <input type="password" id="password" placeholder="Leave empty for open networks">
+    <input type="password" id="password" placeholder="Leave empty for open networks" maxlength="63"
+           autocomplete="current-password" aria-describedby="password-hint">
+    <p id="password-hint" class="sr-only">Leave empty for open networks.</p>
   </div>
 
   <div class="card">
-    <button class="btn btn-primary" id="btn-connect" onclick="doConnect()" disabled>
+    <button type="button" class="btn btn-primary" id="btn-connect" onclick="doConnect()" disabled>
       Connect
     </button>
   </div>
 </div>
 
-<div id="success-view" class="card hidden">
+<div id="success-view" class="card hidden" tabindex="-1" aria-labelledby="success-title">
   <div class="success-box">
-    <div class="icon">&#10003;</div>
-    <p style="font-size:16px;font-weight:600;margin-bottom:8px">Connected!</p>
-    <p style="font-size:13px;color:#6b7280;margin-bottom:12px">Your device is now on the network. Access the full interface at:</p>
+    <svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="12" cy="12" r="10"/><path d="M7.5 12.5l3 3 6-6"/></svg>
+    <p class="title" id="success-title">Connected!</p>
+    <p class="hint">Your device is now on the network. Access the full interface at:</p>
     <p class="ip" id="new-ip"></p>
-    <p style="font-size:12px;color:#9ca3af;margin-top:12px">You may need to reconnect your phone to the same WiFi network.</p>
+    <p class="note">You may need to reconnect your phone to the same WiFi network.</p>
   </div>
 </div>
 
@@ -94,17 +107,53 @@ select:focus,input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px
 var selectedSSID = '';
 var scanning = false;
 var connecting = false;
+var msgTimer = null;
 
 function $(id) { return document.getElementById(id); }
 
-function showMsg(text, type) {
-  var el = $('msg');
-  el.textContent = text;
-  el.className = 'msg msg-' + (type || 'info');
-  if (type === 'ok') setTimeout(function() { el.style.display = 'none'; }, 8000);
+// fetch() with a deadline: on a flaky AP link a request can otherwise hang
+// forever and leave the buttons stuck in their busy state.
+function fetchWithTimeout(url, options, ms) {
+  options = options || {};
+  if (typeof AbortController === 'undefined') return fetch(url, options);
+  var controller = new AbortController();
+  var timer = setTimeout(function() { controller.abort(); }, ms);
+  options.signal = controller.signal;
+  return fetch(url, options).finally(function() { clearTimeout(timer); });
 }
 
-function clearMsg() { $('msg').className = 'msg'; }
+function readJson(r) {
+  return r.json().catch(function() {
+    throw new Error(r.ok ? 'bad-response' : 'http-' + r.status);
+  });
+}
+
+function setBusy(btn, label) {
+  btn.textContent = '';
+  var spin = document.createElement('span');
+  spin.className = 'spinner';
+  spin.setAttribute('aria-hidden', 'true');
+  btn.appendChild(spin);
+  btn.appendChild(document.createTextNode(label));
+}
+
+function showMsg(text, type) {
+  var el = $('msg');
+  if (msgTimer) { clearTimeout(msgTimer); msgTimer = null; }
+  el.style.display = '';
+  // Errors interrupt; progress and success wait their turn.
+  el.setAttribute('role', type === 'err' ? 'alert' : 'status');
+  el.setAttribute('aria-live', type === 'err' ? 'assertive' : 'polite');
+  el.textContent = text;
+  el.className = 'msg msg-' + (type || 'info');
+  if (type === 'ok') msgTimer = setTimeout(function() { el.style.display = 'none'; }, 8000);
+}
+
+function clearMsg() {
+  if (msgTimer) { clearTimeout(msgTimer); msgTimer = null; }
+  $('msg').className = 'msg';
+  $('msg').textContent = '';
+}
 
 function updateConnectBtn() {
   var ssid = $('net-select').value || $('manual-ssid').value.trim();
@@ -128,43 +177,58 @@ function doScan() {
   scanning = true;
   var btn = $('btn-scan');
   btn.disabled = true;
-  btn.innerHTML = '<span class="spinner"></span>Scanning';
+  btn.setAttribute('aria-busy', 'true');
+  setBusy(btn, 'Scanning');
   clearMsg();
 
-  fetch('/api/v3/wifi/scan')
-    .then(function(r) { return r.json(); })
+  fetchWithTimeout('/api/v3/wifi/scan', {}, 30000)
+    .then(readJson)
     .then(function(data) {
       var sel = $('net-select');
+      var previous = sel.value;
       sel.innerHTML = '<option value="">-- Select a network --</option>';
       if (data.status === 'success' && Array.isArray(data.data)) {
-        var nets = data.data;
+        var seen = {};
+        var nets = data.data.filter(function(n) {
+          if (!n || !n.ssid || seen[n.ssid]) return false;
+          seen[n.ssid] = true;
+          return true;
+        });
         for (var i = 0; i < nets.length; i++) {
           var n = nets[i];
           var opt = document.createElement('option');
           opt.value = n.ssid;
-          opt.textContent = n.ssid + ' (' + n.signal + '% - ' + n.security + ')';
+          var details = [];
+          if (n.signal !== undefined && n.signal !== null) details.push(n.signal + '%');
+          if (n.security) details.push(n.security);
+          opt.textContent = n.ssid + (details.length ? ' (' + details.join(' - ') + ')' : '');
           sel.appendChild(opt);
         }
+        if (previous && seen[previous]) sel.value = previous;
         if (nets.length > 0) {
-          var msg = 'Found ' + nets.length + ' network' + (nets.length > 1 ? 's' : '');
+          var msg = 'Found ' + nets.length + (nets.length === 1 ? ' network' : ' networks');
           if (data.cached) {
-            msg += ' \u2014 Showing cached networks. Connect to see the latest.';
+            msg += ' — showing cached networks. Connect to see the latest.';
           }
           showMsg(msg, data.cached ? 'info' : 'ok');
         } else {
-          showMsg('No networks found. ' + (data.cached ? 'Enter your network name manually.' : 'Try scanning again.'), 'info');
+          showMsg('No networks found. ' + (data.cached ? 'Enter your network name manually.' : 'Try scanning again, or enter your network name manually.'), 'info');
         }
       } else {
-        showMsg(data.message || 'Scan failed', 'err');
+        showMsg(data.message || 'Scan failed. Try again, or enter your network name manually.', 'err');
       }
     })
     .catch(function(e) {
-      showMsg('Scan failed: ' + e.message, 'err');
+      var why = e && e.name === 'AbortError'
+        ? 'The scan took too long.'
+        : 'Couldn’t reach the device to scan.';
+      showMsg(why + ' Stay close to the device and try again, or enter your network name manually.', 'err');
     })
     .finally(function() {
       scanning = false;
       btn.disabled = false;
-      btn.innerHTML = 'Scan';
+      btn.removeAttribute('aria-busy');
+      btn.textContent = 'Scan';
       updateConnectBtn();
     });
 }
@@ -175,16 +239,25 @@ function doConnect() {
   connecting = true;
   var btn = $('btn-connect');
   btn.disabled = true;
-  btn.innerHTML = '<span class="spinner"></span>Connecting...';
+  btn.setAttribute('aria-busy', 'true');
+  setBusy(btn, 'Connecting…');
   clearMsg();
-  showMsg('Connecting to ' + ssid + '... This may take 15-30 seconds.', 'info');
+  showMsg('Connecting to ' + ssid + '… This may take 15–30 seconds.', 'info');
 
-  fetch('/api/v3/wifi/connect', {
+  function resetConnect() {
+    connecting = false;
+    btn.disabled = false;
+    btn.removeAttribute('aria-busy');
+    btn.textContent = 'Connect';
+    updateConnectBtn();
+  }
+
+  fetchWithTimeout('/api/v3/wifi/connect', {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({ ssid: ssid, password: $('password').value || '' })
-  })
-  .then(function(r) { return r.json(); })
+  }, 60000)
+  .then(readJson)
   .then(function(data) {
     if (data.status === 'success') {
       clearMsg();
@@ -192,15 +265,19 @@ function doConnect() {
       setTimeout(function() { checkNewIP(ssid); }, 3000);
     } else {
       var msg = data.error_type === 'wrong_password'
-        ? 'Incorrect password — please try again'
-        : (data.message || 'Connection failed');
+        ? 'Incorrect password — please try again.'
+        : (data.message || 'Couldn’t connect to ' + ssid + '. Check the network name and password, then try again.');
       showMsg(msg, 'err');
-      connecting = false;
-      btn.disabled = false;
-      btn.innerHTML = 'Connect';
+      resetConnect();
+      if (data.error_type === 'wrong_password') $('password').focus();
     }
   })
   .catch(function(e) {
+    if (e && /^http-|^bad-response$/.test(e.message)) {
+      showMsg('The device couldn’t start the connection. Try again in a moment.', 'err');
+      resetConnect();
+      return;
+    }
     // Connection may drop if AP mode was disabled — that's expected
     clearMsg();
     showMsg('Connection attempt sent. If the page stops responding, the device is connecting to ' + ssid + '.', 'info');
@@ -216,8 +293,8 @@ function checkNewIP(ssid, retriesLeft) {
     showSuccessFallback(ssid);
     return;
   }
-  fetch('/api/v3/wifi/status')
-    .then(function(r) { return r.json(); })
+  fetchWithTimeout('/api/v3/wifi/status', {}, 8000)
+    .then(readJson)
     .then(function(data) {
       if (data.status === 'success' && data.data && data.data.connected && data.data.ip_address) {
         showSuccess(data.data.ip_address);
@@ -231,18 +308,21 @@ function checkNewIP(ssid, retriesLeft) {
     });
 }
 
-function showSuccess(ip) {
+function revealSuccess(text) {
   $('setup-form').classList.add('hidden');
-  $('success-view').classList.remove('hidden');
-  $('new-ip').textContent = 'http://' + ip + ':5000';
-  $('msg').className = 'msg';
+  var view = $('success-view');
+  view.classList.remove('hidden');
+  $('new-ip').textContent = text;
+  clearMsg();
+  view.focus();
+}
+
+function showSuccess(ip) {
+  revealSuccess('http://' + ip + ':5000');
 }
 
 function showSuccessFallback(ssid) {
-  $('setup-form').classList.add('hidden');
-  $('success-view').classList.remove('hidden');
-  $('new-ip').textContent = 'Check your router for the device IP';
-  $('msg').className = 'msg';
+  revealSuccess('Check your router for the device IP');
 }
 
 // Auto-scan on load
diff --git a/web_interface/templates/v3/partials/backup_restore.html b/web_interface/templates/v3/partials/backup_restore.html
index b4525a47..d742aeba 100644
--- a/web_interface/templates/v3/partials/backup_restore.html
+++ b/web_interface/templates/v3/partials/backup_restore.html
@@ -52,7 +52,7 @@
 
         <div class="space-y-4">
             <div>
-                <label class="block text-sm font-medium text-gray-700 mb-2">Backup file</label>
+                <label for="restore-file-input" class="block text-sm font-medium text-gray-700 mb-2">Backup file</label>
                 <input type="file" id="restore-file-input" accept=".zip"
                        class="block w-full text-sm text-gray-700 file:mr-4 file:py-2 file:px-4 file:rounded-md file:border-0 file:text-sm file:font-medium file:bg-blue-50 file:text-blue-700 hover:file:bg-blue-100">
             </div>
diff --git a/web_interface/templates/v3/partials/display.html b/web_interface/templates/v3/partials/display.html
index 95e64d33..c5a0e322 100644
--- a/web_interface/templates/v3/partials/display.html
+++ b/web_interface/templates/v3/partials/display.html
@@ -1039,10 +1039,25 @@ window.showDisplaySaveResult = function(xhr) {
         content.appendChild(textSpan);
     }
 
-    // Initial UI state and polling — guard against duplicate intervals on re-run
+    // Initial UI state, then the 5s sync-status poll — only while the Display
+    // tab is active and the page is visible. LEDVisibility keys the
+    // registration, so a re-run of this partial replaces the previous timer.
+    function stopSyncTimer() {
+        if (window.syncStatusInterval) {
+            clearInterval(window.syncStatusInterval);
+            window.syncStatusInterval = null;
+        }
+    }
+    function startSyncTimer() {
+        stopSyncTimer();
+        pollSyncStatus();
+        window.syncStatusInterval = setInterval(pollSyncStatus, 5000);
+    }
     function startSyncPolling() {
         updateSyncUI();
-        if (!window.syncStatusInterval) {
+        if (window.LEDVisibility) {
+            window.LEDVisibility.onActive('display', startSyncTimer, stopSyncTimer, 'display-sync-status');
+        } else if (!window.syncStatusInterval) {
             window.syncStatusInterval = setInterval(pollSyncStatus, 5000);
         }
     }
diff --git a/web_interface/templates/v3/partials/fonts.html b/web_interface/templates/v3/partials/fonts.html
index 29038eba..5039a5ab 100644
--- a/web_interface/templates/v3/partials/fonts.html
+++ b/web_interface/templates/v3/partials/fonts.html
@@ -39,7 +39,7 @@
 
                 <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                     <div>
-                        <label class="block text-sm font-medium text-gray-700 mb-1">Font Family Name</label>
+                        <label for="upload-font-family" class="block text-sm font-medium text-gray-700 mb-1">Font Family Name</label>
                         <input type="text" id="upload-font-family" class="form-control" placeholder="e.g., my-custom-font">
                         <p class="text-sm text-gray-600 mt-1">Custom name for this font (letters, numbers, underscores, hyphens)</p>
                     </div>
@@ -75,24 +75,24 @@
         <div class="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-2 2xl:grid-cols-2 gap-6">
             <div>
                 <div id="font-preview-container" class="border border-gray-300 bg-black rounded p-4 min-h-[100px] flex items-center justify-center">
-                    <img id="font-preview-image" src="" alt="Font preview" class="max-w-full" style="display: none;">
+                    <img id="font-preview-image" alt="Font preview" class="max-w-full" style="display: none;">
                     <span id="font-preview-loading" class="text-gray-400">Select a font to preview</span>
                 </div>
             </div>
             <div class="space-y-3">
                 <div>
-                    <label class="block text-sm font-medium text-gray-700 mb-1">Preview Text</label>
+                    <label for="preview-text" class="block text-sm font-medium text-gray-700 mb-1">Preview Text</label>
                     <input type="text" id="preview-text" value="Sample Text 123" class="form-control text-sm">
                 </div>
                 <div class="grid grid-cols-2 gap-3">
                     <div>
-                        <label class="block text-sm font-medium text-gray-700 mb-1">Font Family</label>
+                        <label for="preview-family" class="block text-sm font-medium text-gray-700 mb-1">Font Family</label>
                         <select id="preview-family" class="form-control text-sm">
                             <!-- Dynamically populated from font catalog -->
                         </select>
                     </div>
                     <div>
-                        <label class="block text-sm font-medium text-gray-700 mb-1">Font Size</label>
+                        <label for="preview-size" class="block text-sm font-medium text-gray-700 mb-1">Font Size</label>
                         <select id="preview-size" class="form-control text-sm">
                             <option value="xs">XS (6px)</option>
                             <option value="sm">SM (8px)</option>
@@ -163,11 +163,18 @@ function initializeFontsTab() {
     // Reset retry counter on successful init
     initRetryCount = 0;
     
-    // showNotification is provided by the notification widget (notification.js)
-    // Fallback only if widget hasn't loaded yet
+    // showNotification is implemented by the notification widget
+    // (widgets/notification.js). If it hasn't loaded, queue the message; the
+    // widget shows queued messages as soon as it registers.
     if (typeof window.showNotification !== 'function') {
         window.showNotification = function(message, type = 'info') {
-            console.log(`[${type.toUpperCase()}]`, message);
+            const registry = window.LEDMatrixWidgets;
+            const widget = registry && typeof registry.get === 'function' ? registry.get('notification') : null;
+            if (widget && typeof widget.show === 'function') {
+                return widget.show(message, typeof type === 'string' ? { type: type } : (type || {}));
+            }
+            (window.__pendingNotifications = window.__pendingNotifications || []).push([message, type]);
+            console.log(`[${String((type && type.type) || type).toUpperCase()}]`, message);
         };
     }
 
@@ -725,9 +732,8 @@ function updateUploadProgress(percent) {
 
 <style>
 .drag-over {
-    border-color: #3b82f6 !important;
-    background-color: #eff6ff !important;
-    transform: scale(1.02);
+    border-color: var(--color-primary, #3b82f6) !important;
+    background-color: var(--color-info-bg, #eff6ff) !important;
 }
 
 .font-upload-area {
@@ -735,45 +741,51 @@ function updateUploadProgress(percent) {
 }
 
 .upload-dropzone {
-    border: 3px dashed #d1d5db;
-    border-radius: 10px;
-    padding: 40px;
+    border: 2px dashed var(--color-field-border, #d1d5db);
+    border-radius: 0.75rem;
+    padding: 2rem 1.5rem;
     text-align: center;
-    background: #fafafa;
-    transition: all 0.3s ease;
+    background: var(--color-background, #f9fafb);
+    transition: border-color 0.15s ease, background-color 0.15s ease;
     cursor: pointer;
 }
 
+@media (min-width: 640px) {
+    .upload-dropzone {
+        padding: 2.5rem;
+    }
+}
+
 .upload-dropzone:hover {
-    border-color: #3b82f6;
-    background: #f0f8ff;
+    border-color: var(--color-primary, #3b82f6);
+    background: var(--color-info-bg, #eff6ff);
 }
 
 .upload-dropzone i {
     font-size: 3rem;
-    color: #3b82f6;
-    margin-bottom: 15px;
+    color: var(--color-primary, #3b82f6);
+    margin-bottom: 0.75rem;
     display: block;
 }
 
 .upload-dropzone p {
-    margin: 5px 0;
-    font-size: 1.1rem;
-    color: #374151;
+    margin: 0.25rem 0;
+    font-size: 1rem;
+    color: var(--color-text-secondary, #374151);
 }
 
 .upload-hint {
-    font-size: 0.9rem !important;
-    color: #6b7280 !important;
+    font-size: 0.875rem !important;
+    color: var(--color-text-tertiary, #4b5563) !important;
     font-style: italic;
 }
 
 .upload-form {
-    margin-top: 20px;
-    padding: 20px;
-    background: #f9f9f9;
-    border-radius: 8px;
-    border: 1px solid #d1d5db;
+    margin-top: 1.25rem;
+    padding: 1.25rem;
+    background: var(--color-background, #f9fafb);
+    border-radius: 0.5rem;
+    border: 1px solid var(--color-border, #d1d5db);
 }
 
 #font-preview-container {
diff --git a/web_interface/templates/v3/partials/logs.html b/web_interface/templates/v3/partials/logs.html
index 23cd83c7..3a23b8b9 100644
--- a/web_interface/templates/v3/partials/logs.html
+++ b/web_interface/templates/v3/partials/logs.html
@@ -17,9 +17,9 @@
 
     <!-- Controls -->
     <div class="flex flex-wrap items-center justify-between gap-4 mb-6">
-        <div class="flex items-center space-x-4">
+        <div class="flex flex-wrap items-center gap-3 sm:gap-4">
             <!-- Log Mode Toggle -->
-            <div class="flex items-center space-x-2">
+            <div class="flex items-center gap-2">
                 <label class="flex items-center">
                     <input type="checkbox" id="log-realtime-toggle" class="form-control h-4 w-4" checked>
                     <span class="ml-2 text-sm font-medium">Real-time</span>
@@ -31,7 +31,7 @@
             </div>
 
             <!-- Log Level Filter -->
-            <select id="log-level-filter" class="form-control text-sm">
+            <select id="log-level-filter" aria-label="Filter logs by level" class="form-control text-sm w-auto">
                 <option value="">All Levels</option>
                 <option value="ERROR">Errors Only</option>
                 <option value="WARNING">Warnings & Errors</option>
@@ -39,18 +39,18 @@
             </select>
 
             <!-- Plugin Filter -->
-            <select id="log-plugin-filter" class="form-control text-sm">
+            <select id="log-plugin-filter" aria-label="Filter logs by plugin" class="form-control text-sm w-auto">
                 <option value="">All Plugins</option>
             </select>
 
             <!-- Search -->
             <div class="relative">
-                <input type="text" id="log-search" placeholder="Search logs..." class="form-control text-sm pl-8 pr-4 py-1 w-48">
-                <i class="fas fa-search absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 text-xs"></i>
+                <input type="text" id="log-search" placeholder="Search logs..." aria-label="Search logs" class="form-control text-sm pl-8 pr-4 py-1 w-48">
+                <i class="fas fa-search absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 text-xs pointer-events-none" aria-hidden="true"></i>
             </div>
         </div>
 
-        <div class="flex items-center space-x-2">
+        <div class="flex flex-wrap items-center gap-2">
             <!-- Auto-scroll toggle -->
             <label class="flex items-center">
                 <input type="checkbox" id="log-autoscroll" class="form-control h-4 w-4" checked>
@@ -72,7 +72,7 @@
     <!-- Log Display -->
     <div class="relative">
         <div id="logs-container" class="bg-gray-900 text-gray-100 font-mono text-sm rounded-lg p-3 border border-gray-700 shadow-inner relative" style="height: 500px; min-height: 400px; max-height: 70vh;">
-            <div id="logs-loading" class="absolute inset-0 flex items-center justify-center text-gray-400 bg-gray-900">
+            <div id="logs-loading" class="absolute inset-0 flex items-center justify-center text-gray-300 bg-gray-900">
                 <div class="text-center">
                     <i class="fas fa-spinner fa-spin text-2xl mb-2"></i>
                     <p>Loading logs...</p>
@@ -83,7 +83,7 @@
                     <!-- Logs will be inserted here -->
                 </div>
             </div>
-            <div id="logs-empty" class="hidden absolute inset-0 flex items-center justify-center text-gray-400 bg-gray-900">
+            <div id="logs-empty" class="hidden absolute inset-0 flex items-center justify-center text-gray-300 bg-gray-900">
                 <div class="text-center">
                     <i class="fas fa-file-alt text-4xl mb-2"></i>
                     <p>No logs available</p>
@@ -215,13 +215,32 @@ window._filteredLogs = [];
         });
     }
 
-    refreshCurrentPluginStatus();
-    if (window._currentPluginPollTimer) {
-        clearInterval(window._currentPluginPollTimer);
+    // Current-plugin poll and the realtime log stream run only while the Logs
+    // tab is active and the page is visible (both restart with an immediate
+    // refresh). Re-registering on partial reload replaces the old one.
+    function startLogsActivity() {
+        refreshCurrentPluginStatus();
+        if (window._currentPluginPollTimer) clearInterval(window._currentPluginPollTimer);
+        window._currentPluginPollTimer = setInterval(refreshCurrentPluginStatus, 5000);
+        if (window._isRealtime && !window._logsEventSource) setupRealtimeLogs();
+    }
+    function stopLogsActivity() {
+        if (window._currentPluginPollTimer) {
+            clearInterval(window._currentPluginPollTimer);
+            window._currentPluginPollTimer = null;
+        }
+        stopRealtimeLogs();
+    }
+    if (window.LEDVisibility) {
+        window.LEDVisibility.onActive('logs', startLogsActivity, stopLogsActivity);
+    } else {
+        startLogsActivity();
     }
-    window._currentPluginPollTimer = setInterval(refreshCurrentPluginStatus, 5000);
 
-    // Handle window resize for responsive height
+    // Handle window resize for responsive height. Added once: this script
+    // re-runs on every partial load, and the handler reads window globals.
+    if (window._logsResizeListenerAdded) return;
+    window._logsResizeListenerAdded = true;
     window.addEventListener('resize', function() {
         if (window._logContainer) {
             // Force a reflow to update sizing
@@ -270,10 +289,24 @@ function loadLogs() {
         });
 }
 
-function setupRealtimeLogs() {
+// Closes the log stream and cancels any pending reconnect, so a paused
+// (inactive tab / hidden page) stream stays closed.
+function stopRealtimeLogs() {
+    if (window._logsReconnectTimer) {
+        clearTimeout(window._logsReconnectTimer);
+        window._logsReconnectTimer = null;
+    }
     if (window._logsEventSource) {
         window._logsEventSource.close();
+        window._logsEventSource = null;
     }
+}
+
+function setupRealtimeLogs() {
+    stopRealtimeLogs();
+    // Don't open (or reconnect) while the Logs tab isn't on screen;
+    // LEDVisibility restarts the stream when it is.
+    if (window.LEDVisibility && !window.LEDVisibility.isActive('logs')) return;
 
     window._logsEventSource = new EventSource('/api/v3/stream/logs');
 
@@ -302,8 +335,9 @@ function setupRealtimeLogs() {
             <span>Disconnected from log stream</span>
         `;
 
-        // Attempt to reconnect after 5 seconds
-        setTimeout(setupRealtimeLogs, 5000);
+        // Attempt to reconnect after 5 seconds (cancelled by stopRealtimeLogs)
+        if (window._logsReconnectTimer) clearTimeout(window._logsReconnectTimer);
+        window._logsReconnectTimer = setTimeout(setupRealtimeLogs, 5000);
     };
 }
 
diff --git a/web_interface/templates/v3/partials/operation_history.html b/web_interface/templates/v3/partials/operation_history.html
index 38827856..7f5c14e5 100644
--- a/web_interface/templates/v3/partials/operation_history.html
+++ b/web_interface/templates/v3/partials/operation_history.html
@@ -8,12 +8,12 @@
     <div class="flex flex-wrap items-center justify-between gap-4 mb-6">
         <div class="flex items-center space-x-4">
             <!-- Filter by Plugin -->
-            <select id="history-plugin-filter" class="form-control text-sm">
+            <select id="history-plugin-filter" class="form-control text-sm" aria-label="Filter by plugin">
                 <option value="">All Plugins</option>
             </select>
 
             <!-- Filter by Operation Type -->
-            <select id="history-type-filter" class="form-control text-sm">
+            <select id="history-type-filter" class="form-control text-sm" aria-label="Filter by operation type">
                 <option value="">All Operations</option>
                 <option value="install">Install</option>
                 <option value="update">Update</option>
@@ -24,7 +24,7 @@
             </select>
 
             <!-- Filter by Status -->
-            <select id="history-status-filter" class="form-control text-sm">
+            <select id="history-status-filter" class="form-control text-sm" aria-label="Filter by status">
                 <option value="">All Statuses</option>
                 <option value="success">Success</option>
                 <option value="failed">Failed</option>
@@ -32,8 +32,8 @@
 
             <!-- Search -->
             <div class="relative">
-                <input type="text" id="history-search" placeholder="Search operations..." class="form-control text-sm pl-8 pr-4 py-1 w-48">
-                <i class="fas fa-search absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 text-xs"></i>
+                <input type="text" id="history-search" placeholder="Search operations..." aria-label="Search operations" class="form-control text-sm pl-8 pr-4 py-1 w-48">
+                <i class="fas fa-search absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 text-xs" aria-hidden="true"></i>
             </div>
         </div>
 
diff --git a/web_interface/templates/v3/partials/overview.html b/web_interface/templates/v3/partials/overview.html
index 340fd35d..a1018e28 100644
--- a/web_interface/templates/v3/partials/overview.html
+++ b/web_interface/templates/v3/partials/overview.html
@@ -98,7 +98,7 @@
         <div class="flex-1">
             <p class="text-sm font-semibold text-blue-900"><i class="fas fa-rocket mr-1"></i>Getting Started</p>
             <p class="text-xs text-blue-700 mt-0.5 mb-2">A few steps to get your display up and running. Click a step to jump there, or click its checkbox to mark it done yourself. The card hides once everything is checked.</p>
-            <ul class="space-y-1 text-sm" id="getting-started-items">
+            <ul class="list-none pl-0 space-y-1 text-sm" id="getting-started-items">
                 <li><button type="button" class="gs-item text-left w-full" data-done="{{ '1' if _hw_done else '0' }}" data-tab="display">
                     <i class="far fa-square mr-2"></i>Set your panel size (Display tab)</button></li>
                 <li><button type="button" class="gs-item text-left w-full" data-done="0" data-check="timezone" data-tz="{{ _tz }}" data-tab="general">
diff --git a/web_interface/templates/v3/partials/plugin_config.html b/web_interface/templates/v3/partials/plugin_config.html
index 07615448..8249581b 100644
--- a/web_interface/templates/v3/partials/plugin_config.html
+++ b/web_interface/templates/v3/partials/plugin_config.html
@@ -21,8 +21,8 @@
             {# Schedule picker widget - renders enable/mode/times UI #}
             {% set obj_value = value if value is not none else {} %}
             <div class="form-group mb-4" id="setting-{{ field_id }}" data-setting-key="{{ full_key }}">
-                <label class="block text-sm font-medium text-gray-700 mb-1">{{ label }}{{ ui.help_tip(description, label) }}</label>
-                <div id="{{ field_id }}_container" class="schedule-picker-container mt-1"></div>
+                <label id="{{ field_id }}-label" class="block text-sm font-medium text-gray-700 mb-1">{{ label }}{{ ui.help_tip(description, label) }}</label>
+                <div id="{{ field_id }}_container" class="schedule-picker-container mt-1" role="group" aria-labelledby="{{ field_id }}-label"></div>
                 <input type="hidden" id="{{ field_id }}_data" name="{{ full_key }}" value='{{ (obj_value|tojson|safe)|replace("'", "&#39;") }}'>
             </div>
             <script>
@@ -48,8 +48,8 @@
             {# Time range widget - renders start/end time inputs #}
             {% set obj_value = value if value is not none else {} %}
             <div class="form-group mb-4" id="setting-{{ field_id }}" data-setting-key="{{ full_key }}">
-                <label class="block text-sm font-medium text-gray-700 mb-1">{{ label }}{{ ui.help_tip(description, label) }}</label>
-                <div id="{{ field_id }}_container" class="time-range-container mt-1"></div>
+                <label id="{{ field_id }}-label" class="block text-sm font-medium text-gray-700 mb-1">{{ label }}{{ ui.help_tip(description, label) }}</label>
+                <div id="{{ field_id }}_container" class="time-range-container mt-1" role="group" aria-labelledby="{{ field_id }}-label"></div>
                 <input type="hidden" id="{{ field_id }}_data" name="{{ full_key }}" value='{{ (obj_value|tojson|safe)|replace("'", "&#39;") }}'>
             </div>
             <script>
@@ -88,6 +88,15 @@
             </div>
             <script>
             (function() {
+                // ~10s at 50ms: enough for the widget bundle to arrive over a
+                // slow link to a Pi, bounded so a bundle that never registers
+                // style-editor doesn't poll for the life of the page.
+                var retries = 0;
+                var MAX_RETRIES = 200;
+                function giveUp() {
+                    var container = document.getElementById('{{ field_id }}_container');
+                    if (container) { container.remove(); }
+                }
                 function fallbackIsDirty(root) {
                     if (!root) { return false; }
                     var controls = root.querySelectorAll('input, select, textarea');
@@ -106,9 +115,12 @@
                     return false;
                 }
                 function initWidget() {
-                    if (!window.LEDMatrixWidgets) { setTimeout(initWidget, 50); return; }
-                    var widget = window.LEDMatrixWidgets.get('style-editor');
-                    if (!widget) { setTimeout(initWidget, 50); return; }
+                    var widget = window.LEDMatrixWidgets && window.LEDMatrixWidgets.get('style-editor');
+                    if (!widget) {
+                        // The plain fallback fields stay in place either way.
+                        if (++retries < MAX_RETRIES) { setTimeout(initWidget, 50); } else { giveUp(); }
+                        return;
+                    }
                     var container = document.getElementById('{{ field_id }}_container');
                     var fallback = document.getElementById('{{ field_id }}_fallback');
                     if (!container) { return; }
@@ -145,8 +157,27 @@
             {{ render_nested_section(key, prop, value, prefix, plugin_id) }}
         {% endif %}
     {% else %}
+        {# Point the label at the control that actually takes focus. Widgets
+           render their own element (e.g. <id>_input), so a plain for="<id>"
+           would label nothing. Mirrors the branch order below; a miss just
+           falls back to the old for="<id>". #}
+        {% set _lw = prop.get('x-widget') or prop.get('x_widget') %}
+        {% set label_target = field_id %}
+        {% if field_type == 'boolean' %}
+            {% if _lw == 'toggle-switch' %}{% set label_target = field_id ~ '_button' %}{% endif %}
+        {% elif prop.enum %}
+        {% elif field_type in ['number', 'integer'] %}
+            {% if _lw in ['slider', 'number-input'] %}{% set label_target = field_id ~ '_input' %}{% endif %}
+        {% elif field_type == 'array' %}
+            {% if _lw == 'color-picker' %}{% set label_target = field_id ~ '_hex' %}
+            {% elif _lw == 'file-upload' %}{% set label_target = field_id ~ '_file_input' %}{% endif %}
+        {% elif _lw in ['text-input', 'textarea', 'select-dropdown', 'date-picker', 'time-picker', 'slider', 'email-input', 'url-input', 'password-input', 'font-selector'] %}
+            {% set label_target = field_id ~ '_input' %}
+        {% elif _lw == 'color-picker' %}
+            {% set label_target = field_id ~ '_color' %}
+        {% endif %}
         <div class="form-group mb-4" id="setting-{{ field_id }}" data-setting-key="{{ full_key }}">
-            <label for="{{ field_id }}" class="block text-sm font-medium text-gray-700 mb-1">
+            <label for="{{ label_target }}" id="{{ field_id }}-label" class="block text-sm font-medium text-gray-700 mb-1">
                 {{ label }}{{ ui.help_tip(description, label) }}
             </label>
 
@@ -277,7 +308,11 @@
                          data-max-files="{{ max_files }}"
                          data-max-size-mb="{{ max_size_mb }}"
                          data-allowed-types="{{ allowed_types|join(',') }}"
-                         onclick="document.getElementById('{{ field_id }}_file_input').click()">
+                         role="button"
+                         tabindex="0"
+                         aria-label="Upload files: drop them here or press Enter to choose"
+                         onclick="document.getElementById('{{ field_id }}_file_input').click()"
+                         onkeydown="if(event.key==='Enter'||event.key===' '){event.preventDefault();document.getElementById('{{ field_id }}_file_input').click();}">
                         <input type="file"
                                id="{{ field_id }}_file_input"
                                multiple
@@ -310,8 +345,9 @@
                         <div id="img_{{ img_id|string|replace('.', '_')|replace('-', '_') }}" class="bg-gray-50 p-3 rounded-lg border border-gray-200">
                             <div class="flex items-center justify-between mb-2">
                                 <div class="flex items-center space-x-3 flex-1">
-                                    <img src="/{{ img.get('path', '') }}" 
-                                         alt="{{ img.get('filename', '') }}" 
+                                    <img src="/{{ img.get('path', '') }}"
+                                         alt="{{ img.get('filename', '') }}"
+                                         loading="lazy" decoding="async"
                                          class="w-16 h-16 object-cover rounded"
                                          onerror="this.style.display='none'; this.nextElementSibling.style.display='block';">
                                     <div style="display:none;" class="w-16 h-16 bg-gray-200 rounded flex items-center justify-center">
@@ -336,9 +372,10 @@
                                             data-image-id="{{ img_id }}"
                                             data-image-idx="{{ loop.index0 }}"
                                             onclick="window.openImageSchedule(this.dataset.fieldId, this.dataset.imageId || null, parseInt(this.dataset.imageIdx))"
-                                            class="text-blue-600 hover:text-blue-800 p-2" 
-                                            title="Schedule this image">
-                                        <i class="fas fa-calendar-alt"></i>
+                                            class="text-blue-600 hover:text-blue-800 p-2"
+                                            title="Schedule this image"
+                                            aria-label="Schedule image {{ img.get('original_filename') or img.get('filename', '') }}">
+                                        <i class="fas fa-calendar-alt" aria-hidden="true"></i>
                                     </button>
                                     <button type="button" 
                                             data-field-id="{{ field_id }}"
@@ -346,8 +383,9 @@
                                             data-plugin-id="{{ plugin_id_from_config }}"
                                             onclick="window.deleteUploadedImage(this.dataset.fieldId, this.dataset.imageId, this.dataset.pluginId)"
                                             class="text-red-600 hover:text-red-800 p-2"
-                                            title="Delete image">
-                                        <i class="fas fa-trash"></i>
+                                            title="Delete image"
+                                            aria-label="Delete image {{ img.get('original_filename') or img.get('filename', '') }}">
+                                        <i class="fas fa-trash" aria-hidden="true"></i>
                                     </button>
                                 </div>
                             </div>
@@ -387,7 +425,7 @@
                 </div>
                 {% endif %}
 
-                <div class="mt-1 space-y-2">
+                <div class="mt-1 space-y-2" role="group" aria-labelledby="{{ field_id }}-label">
                     {% for option in enum_items %}
                     {% set is_checked = option in array_value %}
                     {% set option_label = labels.get(option, option|replace('_', ' ')|title) %}
@@ -508,6 +546,7 @@
                                                    name="{{ full_key }}.{{ item_index }}.name"
                                                    value="{{ item.get('name', '') }}"
                                                    class="block w-full px-2 py-1 border border-gray-300 rounded text-sm"
+                                                   aria-label="Feed name, row {{ item_index + 1 }}"
                                                    placeholder="Feed Name"
                                                    required>
                                         </td>
@@ -516,6 +555,7 @@
                                                    name="{{ full_key }}.{{ item_index }}.url"
                                                    value="{{ item.get('url', '') }}"
                                                    class="block w-full px-2 py-1 border border-gray-300 rounded text-sm"
+                                                   aria-label="Feed URL, row {{ item_index + 1 }}"
                                                    placeholder="https://example.com/feed"
                                                    required>
                                         </td>
@@ -534,7 +574,7 @@
                                                     <i class="fas fa-upload mr-1"></i> Upload
                                                 </button>
                                                 {% if logo_path %}
-                                                <img src="/{{ logo_path }}" alt="Logo" class="w-8 h-8 object-cover rounded border" id="{{ field_id }}_logo_preview_{{ item_index }}">
+                                                <img src="/{{ logo_path }}" alt="Logo" loading="lazy" decoding="async" class="w-8 h-8 object-cover rounded border" id="{{ field_id }}_logo_preview_{{ item_index }}">
                                                 <input type="hidden" name="{{ full_key }}.{{ item_index }}.logo.path" value="{{ logo_path }}">
                                                 <input type="hidden" name="{{ full_key }}.{{ item_index }}.logo.id" value="{{ logo_value.get('id', '') }}">
                                                 {% else %}
@@ -549,13 +589,15 @@
                                                    {% if item.get('enabled', true) %}checked{% endif %}
                                                    value="true"
                                                    onchange="this.previousElementSibling.value = this.checked ? 'true' : 'false'"
+                                                   aria-label="Feed enabled, row {{ item_index + 1 }}"
                                                    class="h-4 w-4 text-blue-600">
                                         </td>
                                         <td class="px-4 py-3 whitespace-nowrap text-center">
                                             <button type="button"
                                                     onclick="removeCustomFeedRow(this)"
+                                                    aria-label="Remove feed, row {{ item_index + 1 }}"
                                                     class="text-red-600 hover:text-red-800 px-2 py-1">
-                                                <i class="fas fa-trash"></i>
+                                                <i class="fas fa-trash" aria-hidden="true"></i>
                                             </button>
                                         </td>
                                     </tr>
@@ -624,6 +666,8 @@
                                 <tr class="array-table-row" data-index="{{ item_index }}">
                                     {% for col_name in display_columns %}
                                         {% set col_def = item_properties.get(col_name, {}) %}
+                                        {# Accessible name for the cell's control: column title + row. #}
+                                        {% set cell_label = col_def.get('title', col_name|replace('_', ' ')|title) ~ ', row ' ~ (item_index + 1) %}
                                         {# Normalize nullable types e.g. ["null","integer"] → "integer" #}
                                         {% set _raw_type = col_def.get('type', 'string') %}
                                         {% if _raw_type is iterable and _raw_type is not string %}
@@ -652,6 +696,7 @@
                                                 <input type="hidden" name="{{ full_key }}.{{ item_index }}.{{ col_name }}" value="{{ 'true' if col_value else 'false' }}">
                                                 <input type="checkbox"
                                                        name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                       aria-label="{{ cell_label }}"
                                                        {% if col_value %}checked{% endif %}
                                                        value="true"
                                                        onchange="this.previousElementSibling.value = this.checked ? 'true' : 'false'"
@@ -659,6 +704,7 @@
                                             {% elif col_type == 'integer' or col_type == 'number' %}
                                                 <input type="number"
                                                        name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                       aria-label="{{ cell_label }}"
                                                        value="{{ col_value if col_value is not none else '' }}"
                                                        {% if col_def.get('minimum') is not none %}min="{{ col_def.get('minimum') }}"{% endif %}
                                                        {% if col_def.get('maximum') is not none %}max="{{ col_def.get('maximum') }}"{% endif %}
@@ -671,6 +717,7 @@
                                                    which must not be title-cased behind the user's back. #}
                                                 {% set col_labels = (col_def.get('x-options') or col_def.get('x_options') or {}).get('labels') or {} %}
                                                 <select name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                        aria-label="{{ cell_label }}"
                                                         class="block w-full px-2 py-1 border border-gray-300 rounded text-sm bg-white">
                                                     {% for opt in col_enum %}{% if opt is not none %}
                                                     <option value="{{ opt }}" {% if col_value == opt or (col_value is none and col_def.get('default') == opt) %}selected{% endif %}>{{ col_labels.get(opt, opt) }}</option>
@@ -679,28 +726,32 @@
                                             {% elif col_xwidget == 'date-picker' %}
                                                 <input type="date"
                                                        name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                       aria-label="{{ cell_label }}"
                                                        value="{{ col_value if col_value is not none else '' }}"
                                                        class="block w-full px-2 py-1 border border-gray-300 rounded text-sm">
                                             {% elif col_xwidget == 'time-picker' %}
                                                 <input type="time"
                                                        name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                       aria-label="{{ cell_label }}"
                                                        value="{{ col_value if col_value is not none else '00:00' }}"
                                                        class="block w-full px-2 py-1 border border-gray-300 rounded text-sm">
                                             {% elif col_xwidget == 'file-upload-single' %}
                                                 {% set cell_input_id = field_id ~ '_' ~ item_index ~ '_' ~ col_name %}
                                                 <div class="flex items-center gap-1">
-                                                    {% if col_value %}<img src="/{{ col_value }}" class="w-6 h-6 object-cover rounded flex-shrink-0" onerror="this.style.display='none'">{% endif %}
+                                                    {% if col_value %}<img src="/{{ col_value }}" alt="" loading="lazy" decoding="async" class="w-6 h-6 object-cover rounded flex-shrink-0" onerror="this.style.display='none'">{% endif %}
                                                     <input type="text"
                                                            id="{{ cell_input_id }}"
+                                                           aria-label="{{ cell_label }}"
                                                            name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
                                                            value="{{ col_value if col_value is not none else '' }}"
                                                            class="block w-20 px-1 py-1 border border-gray-300 rounded text-xs"
                                                            placeholder="path…">
-                                                    <label class="cursor-pointer flex-shrink-0 inline-flex items-center px-1 py-1 bg-blue-50 border border-blue-200 rounded text-xs text-blue-600 hover:bg-blue-100" title="Upload image">
-                                                        <i class="fas fa-upload"></i>
+                                                    <label class="file-trigger cursor-pointer flex-shrink-0 inline-flex items-center px-1 py-1 bg-blue-50 border border-blue-200 rounded text-xs text-blue-600 hover:bg-blue-100" title="Upload image">
+                                                        <i class="fas fa-upload" aria-hidden="true"></i>
                                                         <input type="file"
+                                                               class="sr-only"
+                                                               aria-label="Upload image: {{ cell_label }}"
                                                                accept="image/png,image/jpeg,image/bmp,image/gif"
-                                                               style="display:none"
                                                                data-plugin-id="{{ plugin_id }}"
                                                                data-target-input="{{ cell_input_id }}"
                                                                onchange="(function(e){ const t=document.getElementById('{{ cell_input_id }}'); const p=t.previousElementSibling && t.previousElementSibling.tagName==='IMG' ? t.previousElementSibling : null; window.handleArrayTableImageUpload(e,t,p,'{{ plugin_id }}'); })(event)">
@@ -709,6 +760,7 @@
                                             {% else %}
                                                 <input type="text"
                                                        name="{{ full_key }}.{{ item_index }}.{{ col_name }}"
+                                                       aria-label="{{ cell_label }}"
                                                        value="{{ col_value if col_value is not none else '' }}"
                                                        class="block w-full px-2 py-1 border border-gray-300 rounded text-sm"
                                                        {% if col_def.get('description') %}placeholder="{{ col_def.get('description') }}"{% endif %}
@@ -725,15 +777,17 @@
                                     <td class="px-3 py-3 whitespace-nowrap text-center" style="min-width:90px;vertical-align:middle">
                                         <button type="button"
                                                 onclick="removeArrayTableRow(this)"
+                                                aria-label="Remove row {{ item_index + 1 }}"
                                                 class="text-red-600 hover:text-red-800 px-2 py-1">
-                                            <i class="fas fa-trash"></i>
+                                            <i class="fas fa-trash" aria-hidden="true"></i>
                                         </button>
                                         {% if has_advanced.value %}
                                         <button type="button"
                                                 onclick="openArrayTableRowEditor(this)"
                                                 class="text-blue-500 hover:text-blue-700 px-2 py-1 ml-1"
+                                                aria-label="Edit advanced settings for row {{ item_index + 1 }}"
                                                 title="Edit layout, style and other advanced properties">
-                                            <i class="fas fa-sliders-h"></i>
+                                            <i class="fas fa-sliders-h" aria-hidden="true"></i>
                                         </button>
                                         {% endif %}
                                     </td>
@@ -804,9 +858,10 @@
                                value="{{ hex_val }}"
                                class="h-9 w-12 cursor-pointer rounded border border-gray-300"
                                title="Color picker"
+                               aria-label="{{ label }} color picker"
                                oninput="(function(h){var r=parseInt(h.slice(1,3),16),g=parseInt(h.slice(3,5),16),b=parseInt(h.slice(5,7),16);document.getElementById('{{ field_id }}_r').value=r;document.getElementById('{{ field_id }}_g').value=g;document.getElementById('{{ field_id }}_b').value=b;})(this.value)">
                         <div class="flex items-center gap-1">
-                            <label class="text-xs text-gray-500 font-medium">R</label>
+                            <label for="{{ field_id }}_r" class="text-xs text-gray-500 font-medium"><span aria-hidden="true">R</span><span class="sr-only">Red</span></label>
                             <input type="number" min="0" max="255" step="1"
                                    id="{{ field_id }}_r"
                                    name="{{ full_key }}.0"
@@ -815,7 +870,7 @@
                                    oninput="(function(){var r=+document.getElementById('{{ field_id }}_r').value||0,g=+document.getElementById('{{ field_id }}_g').value||0,b=+document.getElementById('{{ field_id }}_b').value||0;document.getElementById('{{ field_id }}_hex').value='#'+[r,g,b].map(function(n){return n.toString(16).padStart(2,'0')}).join('')})()">
                         </div>
                         <div class="flex items-center gap-1">
-                            <label class="text-xs text-gray-500 font-medium">G</label>
+                            <label for="{{ field_id }}_g" class="text-xs text-gray-500 font-medium"><span aria-hidden="true">G</span><span class="sr-only">Green</span></label>
                             <input type="number" min="0" max="255" step="1"
                                    id="{{ field_id }}_g"
                                    name="{{ full_key }}.1"
@@ -824,7 +879,7 @@
                                    oninput="(function(){var r=+document.getElementById('{{ field_id }}_r').value||0,g=+document.getElementById('{{ field_id }}_g').value||0,b=+document.getElementById('{{ field_id }}_b').value||0;document.getElementById('{{ field_id }}_hex').value='#'+[r,g,b].map(function(n){return n.toString(16).padStart(2,'0')}).join('')})()">
                         </div>
                         <div class="flex items-center gap-1">
-                            <label class="text-xs text-gray-500 font-medium">B</label>
+                            <label for="{{ field_id }}_b" class="text-xs text-gray-500 font-medium"><span aria-hidden="true">B</span><span class="sr-only">Blue</span></label>
                             <input type="number" min="0" max="255" step="1"
                                    id="{{ field_id }}_b"
                                    name="{{ full_key }}.2"
@@ -1235,20 +1290,21 @@
                             {% for key, value in config.items() %}
                                 {% if key not in ['enabled'] %}
                                 <div class="form-group mb-4">
-                                    <label class="block text-sm font-medium text-gray-700 mb-1">
+                                    {% set fallback_id = 'fallback-field-' ~ (key|string|replace(' ', '-')) %}
+                                    <label for="{{ fallback_id }}" class="block text-sm font-medium text-gray-700 mb-1">
                                         {{ key|replace('_', ' ')|title }}
                                     </label>
                                     {% if value is sameas true or value is sameas false %}
                                     <label class="flex items-center cursor-pointer">
-                                        <input type="checkbox" name="{{ key }}" {% if value %}checked{% endif %}
+                                        <input type="checkbox" id="{{ fallback_id }}" name="{{ key }}" {% if value %}checked{% endif %}
                                                class="h-4 w-4 text-blue-600 focus:ring-blue-500 border-gray-300 rounded">
                                         <span class="ml-2 text-sm text-gray-600">Enabled</span>
                                     </label>
                                     {% elif value is number %}
-                                    <input type="number" name="{{ key }}" value="{{ value }}"
+                                    <input type="number" id="{{ fallback_id }}" name="{{ key }}" value="{{ value }}"
                                            class="form-input w-full rounded-md border-gray-300 bg-gray-900 text-white placeholder:text-gray-400">
                                     {% else %}
-                                    <input type="text" name="{{ key }}" value="{{ value }}"
+                                    <input type="text" id="{{ fallback_id }}" name="{{ key }}" value="{{ value }}"
                                            class="form-input w-full rounded-md border-gray-300 bg-gray-900 text-white placeholder:text-gray-400">
                                     {% endif %}
                                 </div>
diff --git a/web_interface/templates/v3/partials/plugins.html b/web_interface/templates/v3/partials/plugins.html
index d62a8cbc..adb160f1 100644
--- a/web_interface/templates/v3/partials/plugins.html
+++ b/web_interface/templates/v3/partials/plugins.html
@@ -6,7 +6,7 @@
 
     <!-- Plugin Controls -->
     <div class="flex flex-wrap items-center justify-between gap-4 mb-6">
-        <div class="flex items-center space-x-4">
+        <div class="flex flex-wrap items-center gap-2 sm:gap-4">
             <button type="button" id="refresh-plugins-btn" class="btn bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-md">
                 <i class="fas fa-sync-alt mr-2"></i>Refresh Plugins
             </button>
@@ -34,7 +34,7 @@
             <div id="installed-filter-bar" class="flex flex-wrap items-center gap-3 mb-4 p-3 bg-gray-50 rounded-lg border border-gray-200">
                 <!-- Search -->
                 <div class="relative flex-1 min-w-[12rem]">
-                    <i class="fas fa-search absolute left-3 top-1/2 -translate-y-1/2 text-gray-400 text-sm pointer-events-none"></i>
+                    <i class="fas fa-search absolute left-3 top-1/2 -translate-y-1/2 text-gray-400 text-sm pointer-events-none" aria-hidden="true"></i>
                     <input type="text"
                            id="installed-search"
                            class="form-control text-sm pl-9 pr-8 py-2"
@@ -44,7 +44,7 @@
                     <button type="button" id="installed-search-clear"
                             class="hidden absolute right-2 top-1/2 -translate-y-1/2 text-gray-400 hover:text-gray-600"
                             aria-label="Clear search">
-                        <i class="fas fa-times-circle"></i>
+                        <i class="fas fa-times-circle" aria-hidden="true"></i>
                     </button>
                 </div>
 
@@ -149,7 +149,7 @@
             <!-- GitHub Token Configuration (Combined Warning + Settings) -->
             <div id="github-token-container" class="mb-5">
                 <!-- Warning Banner (shown when no token configured) -->
-                <div id="github-auth-warning" class="hidden bg-yellow-50 border-l-4 border-yellow-400 p-4 rounded-r-lg">
+                <div id="github-auth-warning" class="hidden bg-yellow-50 border border-yellow-300 p-4 rounded-lg">
                     <div class="flex">
                         <div class="flex-shrink-0">
                             <i class="fas fa-exclamation-triangle text-yellow-400"></i>
@@ -170,8 +170,8 @@
                             </p>
                         </div>
                         <div class="flex-shrink-0">
-                            <button onclick="dismissGithubWarning()" class="text-yellow-700 hover:text-yellow-900">
-                                <i class="fas fa-times"></i>
+                            <button type="button" onclick="dismissGithubWarning()" class="text-yellow-700 hover:text-yellow-900" aria-label="Dismiss GitHub token warning">
+                                <i class="fas fa-times" aria-hidden="true"></i>
                             </button>
                         </div>
                     </div>
@@ -207,9 +207,10 @@
                             <input type="password" id="github-token-input" 
                                    class="w-full px-3 py-2 pr-20 border border-gray-300 rounded-md focus:ring-blue-500 focus:border-blue-500"
                                    placeholder="ghp_xxxxxxxxxxxxxxxxxxxx">
-                            <button type="button" onclick="toggleGithubTokenVisibility()" 
-                                    class="absolute inset-y-0 right-0 pr-3 flex items-center text-gray-500 hover:text-gray-700">
-                                <i id="github-token-icon" class="fas fa-eye"></i>
+                            <button type="button" onclick="toggleGithubTokenVisibility()"
+                                    class="absolute inset-y-0 right-0 pr-3 flex items-center text-gray-500 hover:text-gray-700"
+                                    aria-label="Show token" aria-controls="github-token-input">
+                                <i id="github-token-icon" class="fas fa-eye" aria-hidden="true"></i>
                             </button>
                         </div>
                         <p class="text-xs text-gray-500 mt-1">
@@ -246,8 +247,8 @@
             </div>
             <!-- Search Row -->
             <div class="flex gap-3 mb-4">
-                <input type="text" id="plugin-search" placeholder="Search plugins by name, description, or tags..." class="form-control text-sm flex-[3] min-w-0 px-4 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
-                <select id="plugin-category" class="form-control text-sm flex-1 px-3 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
+                <input type="text" id="plugin-search" placeholder="Search plugins by name, description, or tags..." aria-label="Search the Plugin Store" class="form-control text-sm flex-[3] min-w-0 px-4 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
+                <select id="plugin-category" aria-label="Filter the Plugin Store by category" class="form-control text-sm flex-1 px-3 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
                     <option value="">All Categories</option>
                     <option value="sports">Sports</option>
                     <option value="content">Content</option>
@@ -262,7 +263,7 @@
             <!-- Sort & Filter Bar -->
             <div id="store-filter-bar" class="flex flex-wrap items-center gap-3 mb-4 p-3 bg-gray-50 rounded-lg border border-gray-200">
                 <!-- Sort -->
-                <select id="store-sort" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
+                <select id="store-sort" aria-label="Sort the Plugin Store" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
                     <option value="a-z">A → Z</option>
                     <option value="z-a">Z → A</option>
                     <option value="category">Category</option>
@@ -289,13 +290,13 @@
             <!-- Results Bar (top pagination) -->
             <div class="flex flex-wrap items-center justify-between gap-3 mb-4">
                 <span id="store-results-info" class="text-sm text-gray-600"></span>
-                <div class="flex items-center gap-3">
-                    <select id="store-per-page" class="text-sm px-2 py-1 border border-gray-300 rounded-md bg-white">
+                <div class="flex flex-wrap items-center gap-3">
+                    <select id="store-per-page" aria-label="Plugins per page" class="text-sm px-2 py-1 border border-gray-300 rounded-md bg-white">
                         <option value="12">12 per page</option>
                         <option value="24">24 per page</option>
                         <option value="48">48 per page</option>
                     </select>
-                    <div id="store-pagination-top" class="flex items-center gap-1"></div>
+                    <div id="store-pagination-top" class="flex flex-wrap items-center gap-1"></div>
                 </div>
             </div>
 
@@ -355,8 +356,8 @@
 
                 <!-- Search Row -->
                 <div class="flex gap-3 mb-4">
-                    <input type="text" id="starlark-search" placeholder="Search by name, description, author..." class="form-control text-sm flex-[3] min-w-0 px-4 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
-                    <select id="starlark-category" class="form-control text-sm flex-1 px-3 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
+                    <input type="text" id="starlark-search" placeholder="Search by name, description, author..." aria-label="Search Starlark apps" class="form-control text-sm flex-[3] min-w-0 px-4 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
+                    <select id="starlark-category" aria-label="Filter Starlark apps by category" class="form-control text-sm flex-1 px-3 py-2.5 border border-gray-300 rounded-lg shadow-sm focus:shadow-md transition-shadow">
                         <option value="">All Categories</option>
                     </select>
                 </div>
@@ -364,7 +365,7 @@
                 <!-- Sort & Filter Bar -->
                 <div id="starlark-filter-bar" class="flex flex-wrap items-center gap-3 mb-4 p-3 bg-gray-50 rounded-lg border border-gray-200">
                     <!-- Sort -->
-                    <select id="starlark-sort" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
+                    <select id="starlark-sort" aria-label="Sort Starlark apps" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
                         <option value="a-z">A → Z</option>
                         <option value="z-a">Z → A</option>
                         <option value="category">Category</option>
@@ -379,7 +380,7 @@
                     </button>
 
                     <!-- Author filter -->
-                    <select id="starlark-filter-author" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
+                    <select id="starlark-filter-author" aria-label="Filter Starlark apps by author" class="text-sm px-3 py-1.5 border border-gray-300 rounded-md bg-white">
                         <option value="">All Authors</option>
                     </select>
 
@@ -395,13 +396,13 @@
                 <!-- Results Bar (top pagination) -->
                 <div class="flex flex-wrap items-center justify-between gap-3 mb-4">
                     <span id="starlark-results-info" class="text-sm text-gray-600"></span>
-                    <div class="flex items-center gap-3">
-                        <select id="starlark-per-page" class="text-sm px-2 py-1 border border-gray-300 rounded-md bg-white">
+                    <div class="flex flex-wrap items-center gap-3">
+                        <select id="starlark-per-page" aria-label="Starlark apps per page" class="text-sm px-2 py-1 border border-gray-300 rounded-md bg-white">
                             <option value="24">24 per page</option>
                             <option value="48">48 per page</option>
                             <option value="96">96 per page</option>
                         </select>
-                        <div id="starlark-pagination-top" class="flex items-center gap-1"></div>
+                        <div id="starlark-pagination-top" class="flex flex-wrap items-center gap-1"></div>
                     </div>
                 </div>
 
@@ -463,7 +464,7 @@
                     <p class="text-xs text-gray-600 mb-3">Install a plugin directly from its GitHub repository URL</p>
                     <div class="space-y-2">
                         <div class="flex gap-2">
-                            <input type="text" id="github-plugin-url" 
+                            <input type="text" id="github-plugin-url" aria-label="Plugin GitHub repository URL"
                                    placeholder="https://github.com/user/ledmatrix-plugin-name" 
                                    class="flex-1 px-3 py-2 text-sm border border-gray-300 rounded-md focus:ring-blue-500 focus:border-blue-500">
                             <button type="button" id="install-plugin-from-url" 
@@ -491,7 +492,7 @@
                     </h4>
                     <p class="text-xs text-gray-600 mb-3">Load a registry-style monorepo (like the official ledmatrix-plugins repo) to browse and install plugins</p>
                     <div class="flex gap-2 mb-2">
-                        <input type="text" id="github-registry-url" 
+                        <input type="text" id="github-registry-url" aria-label="Plugin registry GitHub URL"
                                placeholder="https://github.com/user/ledmatrix-plugins" 
                                class="flex-1 px-3 py-2 text-sm border border-gray-300 rounded-md focus:ring-blue-500 focus:border-blue-500">
                         <button id="load-registry-from-url" class="px-4 py-2 bg-green-600 hover:bg-green-700 text-white text-sm rounded-md whitespace-nowrap">
diff --git a/web_interface/templates/v3/partials/raw_json.html b/web_interface/templates/v3/partials/raw_json.html
index c2ec4b10..c64140b9 100644
--- a/web_interface/templates/v3/partials/raw_json.html
+++ b/web_interface/templates/v3/partials/raw_json.html
@@ -4,7 +4,7 @@
         <div class="border-b border-gray-200 pb-4 mb-6">
             <div class="flex items-center justify-between">
                 <div>
-                    <h2 class="text-lg font-semibold text-gray-900">config.json Editor</h2>
+                    <h2 id="main-config-editor-title" class="text-lg font-semibold text-gray-900">config.json Editor</h2>
                     <p class="mt-1 text-sm text-gray-600">{{ main_config_path }}</p>
                 </div>
                 <div class="flex gap-2">
@@ -28,7 +28,7 @@
         </div>
 
         <div class="relative">
-            <textarea id="main-config-editor" 
+            <textarea id="main-config-editor" aria-labelledby="main-config-editor-title"
                       class="w-full h-96 font-mono text-sm p-4 border border-gray-300 rounded-md focus:ring-blue-500 focus:border-blue-500"
                       spellcheck="false">{{ main_config_json }}</textarea>
             <div id="main-config-validation" class="mt-2 text-sm"></div>
@@ -55,7 +55,7 @@
         <div class="border-b border-gray-200 pb-4 mb-6">
             <div class="flex items-center justify-between">
                 <div>
-                    <h2 class="text-lg font-semibold text-gray-900">config_secrets.json Editor</h2>
+                    <h2 id="secrets-config-editor-title" class="text-lg font-semibold text-gray-900">config_secrets.json Editor</h2>
                     <p class="mt-1 text-sm text-gray-600">{{ secrets_config_path }}</p>
                 </div>
                 <div class="flex gap-2">
@@ -79,7 +79,7 @@
         </div>
 
         <div class="relative">
-            <textarea id="secrets-config-editor" 
+            <textarea id="secrets-config-editor" aria-labelledby="secrets-config-editor-title"
                       class="w-full h-96 font-mono text-sm p-4 border border-gray-300 rounded-md focus:ring-blue-500 focus:border-blue-500"
                       spellcheck="false">{{ secrets_config_json }}</textarea>
             <div id="secrets-config-validation" class="mt-2 text-sm"></div>
diff --git a/web_interface/templates/v3/partials/starlark_config.html b/web_interface/templates/v3/partials/starlark_config.html
index af50a7a9..bd7af5f6 100644
--- a/web_interface/templates/v3/partials/starlark_config.html
+++ b/web_interface/templates/v3/partials/starlark_config.html
@@ -1,3 +1,6 @@
+{# Prefix for label/input id pairs; app ids and field ids are sanitised so
+   the ids stay valid and unique if several app configs are on the page. #}
+{% set sl_prefix = ('starlark-' ~ app_id)|replace(':', '-')|replace('.', '-')|replace(' ', '-')|replace('/', '-') %}
 <div class="space-y-6">
     <!-- Header -->
     <div class="flex items-center justify-between pb-4 border-b border-gray-200">
@@ -59,16 +62,18 @@
         <div id="starlark-config-form" class="space-y-4">
             <div class="grid grid-cols-1 md:grid-cols-2 gap-4">
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">Render Interval (seconds)</label>
+                    <label for="{{ sl_prefix }}-render-interval" class="block text-sm font-medium text-gray-700 mb-1">Render Interval (seconds)</label>
                     <input type="number" min="10" max="86400" step="1"
+                           id="{{ sl_prefix }}-render-interval"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ render_interval }}"
                            data-starlark-config="render_interval">
                     <p class="text-xs text-gray-400 mt-1">How often the app re-renders (fetches new data)</p>
                 </div>
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">Display Duration (seconds)</label>
+                    <label for="{{ sl_prefix }}-display-duration" class="block text-sm font-medium text-gray-700 mb-1">Display Duration (seconds)</label>
                     <input type="number" min="1" max="3600" step="1"
+                           id="{{ sl_prefix }}-display-duration"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ display_duration }}"
                            data-starlark-config="display_duration">
@@ -98,12 +103,14 @@
                 {% set field_desc = field.desc or '' %}
                 {% set field_default = field.default if field.default is defined else '' %}
                 {% set current_val = config.get(field_id, field_default) if config else field_default %}
+                {% set input_id = (sl_prefix ~ '-f-' ~ field_id)|replace(' ', '-')|replace('.', '-')|replace(':', '-')|replace('/', '-') %}
 
                 {# ── text ── #}
                 {% if field_type == 'text' %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
                     <input type="text"
+                           id="{{ input_id }}"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ current_val }}"
                            placeholder="{{ field_desc }}"
@@ -116,8 +123,8 @@
                 {# ── dropdown ── #}
                 {% elif field_type == 'dropdown' %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
-                    <select class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm bg-white"
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <select id="{{ input_id }}" class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm bg-white"
                             data-starlark-config="{{ field_id }}">
                         {% for opt in (field.options or []) %}
                         <option value="{{ opt.value }}" {{ 'selected' if current_val|string == opt.value|string else '' }}>
@@ -149,14 +156,16 @@
                 {# ── color ── #}
                 {% elif field_type == 'color' %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
                     <div class="flex items-center gap-2">
                         <input type="color"
+                               aria-label="{{ field_name }} color picker"
                                class="w-10 h-10 rounded border border-gray-300 cursor-pointer p-0.5"
                                value="{{ current_val or '#FFFFFF' }}"
                                data-starlark-color-picker="{{ field_id }}"
                                oninput="this.closest('.space-y-6').querySelector('[data-starlark-config={{ field_id }}]').value = this.value">
                         <input type="text"
+                               id="{{ input_id }}"
                                class="form-control flex-1 px-3 py-2 border border-gray-300 rounded-md text-sm font-mono"
                                value="{{ current_val or '#FFFFFF' }}"
                                placeholder="#RRGGBB"
@@ -171,8 +180,9 @@
                 {# ── datetime ── #}
                 {% elif field_type == 'datetime' %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
                     <input type="datetime-local"
+                           id="{{ input_id }}"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ current_val }}"
                            data-starlark-config="{{ field_id }}">
@@ -184,10 +194,11 @@
                 {# ── location (mini-form) ── #}
                 {% elif field_type == 'location' %}
                 <div class="form-group" data-starlark-location-group="{{ field_id }}" data-starlark-location-value="{{ current_val }}">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
-                    <div class="grid grid-cols-1 md:grid-cols-3 gap-2">
+                    <label id="{{ input_id }}-label" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <div class="grid grid-cols-1 md:grid-cols-3 gap-2" role="group" aria-labelledby="{{ input_id }}-label">
                         <div>
                             <input type="number" step="any" min="-90" max="90"
+                                   aria-label="{{ field_name }} latitude"
                                    class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                                    placeholder="Latitude"
                                    data-starlark-location-field="{{ field_id }}"
@@ -195,6 +206,7 @@
                         </div>
                         <div>
                             <input type="number" step="any" min="-180" max="180"
+                                   aria-label="{{ field_name }} longitude"
                                    class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                                    placeholder="Longitude"
                                    data-starlark-location-field="{{ field_id }}"
@@ -204,6 +216,7 @@
                             <input type="text"
                                    class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                                    placeholder="Timezone (e.g. America/New_York)"
+                                   aria-label="{{ field_name }} timezone"
                                    data-starlark-location-field="{{ field_id }}"
                                    data-starlark-location-key="timezone">
                         </div>
@@ -243,8 +256,9 @@
                 {# ── typeahead / location_based (text fallback with note) ── #}
                 {% elif field_type in ('typeahead', 'location_based') %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
                     <input type="text"
+                           id="{{ input_id }}"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ current_val }}"
                            placeholder="{{ field_desc }}"
@@ -261,8 +275,9 @@
                 {# ── unknown type (text fallback) ── #}
                 {% else %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
+                    <label for="{{ input_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ field_name }}</label>
                     <input type="text"
+                           id="{{ input_id }}"
                            class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ current_val }}"
                            placeholder="{{ field_desc }}"
@@ -287,8 +302,9 @@
                 {% for key, value in config.items() %}
                     {% if key not in ('render_interval', 'display_duration') and key not in schema_ids %}
                     <div class="form-group">
-                        <label class="block text-sm font-medium text-gray-700 mb-1">{{ key }} <span class="text-xs text-gray-400">(custom)</span></label>
-                        <input type="text" class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
+                        {% set custom_id = (sl_prefix ~ '-c-' ~ key)|replace(' ', '-')|replace('.', '-')|replace(':', '-')|replace('/', '-') %}
+                        <label for="{{ custom_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ key }} <span class="text-xs text-gray-400">(custom)</span></label>
+                        <input type="text" id="{{ custom_id }}" class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                                value="{{ value }}"
                                data-starlark-config="{{ key }}">
                     </div>
@@ -303,8 +319,9 @@
             {% for key, value in config.items() %}
                 {% if key not in ('render_interval', 'display_duration') %}
                 <div class="form-group">
-                    <label class="block text-sm font-medium text-gray-700 mb-1">{{ key }}</label>
-                    <input type="text" class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
+                    {% set raw_id = (sl_prefix ~ '-r-' ~ key)|replace(' ', '-')|replace('.', '-')|replace(':', '-')|replace('/', '-') %}
+                    <label for="{{ raw_id }}" class="block text-sm font-medium text-gray-700 mb-1">{{ key }}</label>
+                    <input type="text" id="{{ raw_id }}" class="form-control w-full px-3 py-2 border border-gray-300 rounded-md text-sm"
                            value="{{ value }}"
                            data-starlark-config="{{ key }}">
                 </div>
diff --git a/web_interface/templates/v3/partials/tools.html b/web_interface/templates/v3/partials/tools.html
index 6de6dcb0..20788abb 100644
--- a/web_interface/templates/v3/partials/tools.html
+++ b/web_interface/templates/v3/partials/tools.html
@@ -32,7 +32,7 @@
 
         <div class="space-y-4">
             <!-- Switch branch -->
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div class="min-w-0">
                     <p class="text-sm font-medium text-gray-900">Branch</p>
                     <p class="text-xs text-gray-500 mt-0.5">Choose which branch this pi follows. Switching attaches tracking, so Pull Latest works afterwards.</p>
@@ -50,7 +50,7 @@
             <div id="result-checkout-branch" class="hidden"></div>
 
             <!-- Pull latest -->
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Pull latest (rebase)</p>
                     <p class="text-xs text-gray-500 mt-0.5">Stashes any local changes, then runs <code class="bg-gray-100 px-1 rounded">git pull --rebase</code>. The stash is preserved but not re-applied.</p>
@@ -63,7 +63,7 @@
             <div id="result-git-pull" class="hidden"></div>
 
             <!-- Force reset -->
-            <div class="flex items-start justify-between gap-4 pt-4 border-t border-gray-100">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4 pt-4 border-t border-gray-100">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Force reset to <code class="bg-gray-100 px-1 rounded">origin/main</code></p>
                     <p class="text-xs text-gray-500 mt-0.5">Runs <code class="bg-gray-100 px-1 rounded">git fetch origin</code> then <code class="bg-gray-100 px-1 rounded">git reset --hard origin/main</code>. Discards all local changes.</p>
@@ -99,7 +99,7 @@
 
         <div class="space-y-4">
             <!-- Base requirements -->
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Reinstall base requirements</p>
                     <p class="text-xs text-gray-500 mt-0.5">Installs from <code class="bg-gray-100 px-1 rounded">requirements.txt</code> in the project root.</p>
@@ -112,7 +112,7 @@
             <div id="result-base-reqs" class="hidden"></div>
 
             <!-- Plugin requirements -->
-            <div class="flex items-start justify-between gap-4 pt-4 border-t border-gray-100">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4 pt-4 border-t border-gray-100">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Reinstall plugin requirements</p>
                     <p class="text-xs text-gray-500 mt-0.5">Runs <code class="bg-gray-100 px-1 rounded">pip install</code> for every installed plugin that has a <code class="bg-gray-100 px-1 rounded">requirements.txt</code>.</p>
@@ -134,7 +134,7 @@
         </div>
 
         <div class="space-y-4">
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Clear Python cache</p>
                     <p class="text-xs text-gray-500 mt-0.5">Deletes all <code class="bg-gray-100 px-1 rounded">__pycache__</code> directories in the project. Useful after switching branches or debugging import issues.</p>
@@ -166,14 +166,15 @@
             <p class="mt-1 text-sm text-gray-600">Turn the WiFi radio on or off. Full WiFi setup (scan, connect, hotspot) lives on the <span class="font-medium">WiFi</span> tab.</p>
         </div>
 
-        <div class="flex items-start justify-between gap-4">
+        <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
             <div>
-                <p class="text-sm font-medium text-gray-900">WiFi radio</p>
+                <p id="wifi-radio-label" class="text-sm font-medium text-gray-900">WiFi radio</p>
                 <p id="wifi-radio-note" class="text-xs text-gray-500 mt-0.5">Checking current state…</p>
             </div>
             <div class="shrink-0 flex flex-col items-end gap-2">
                 <!-- Toggle switch -->
                 <button id="wifi-radio-toggle" type="button" role="switch" aria-checked="false"
+                        aria-labelledby="wifi-radio-label" aria-describedby="wifi-radio-note"
                         onclick="onWifiRadioToggleClick()" disabled
                         class="relative inline-flex h-6 w-11 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent bg-gray-200 transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 opacity-60">
                     <span id="wifi-radio-knob" aria-hidden="true"
@@ -207,7 +208,7 @@
         </div>
 
         <div class="space-y-4">
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Restart display service</p>
                     <p class="text-xs text-gray-500 mt-0.5">Restarts <code class="bg-gray-100 px-1 rounded">ledmatrix.service</code>.</p>
@@ -219,7 +220,7 @@
             </div>
             <div id="result-restart-display" class="hidden"></div>
 
-            <div class="flex items-start justify-between gap-4 pt-4 border-t border-gray-100">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4 pt-4 border-t border-gray-100">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Restart web interface</p>
                     <p class="text-xs text-gray-500 mt-0.5">Restarts <code class="bg-gray-100 px-1 rounded">ledmatrix-web.service</code>. The page will go offline briefly.</p>
@@ -282,7 +283,7 @@
 
         <div class="space-y-4">
             <!-- Reboot -->
-            <div class="flex items-start justify-between gap-4">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Reboot</p>
                     <p class="text-xs text-gray-500 mt-0.5">Runs <code class="bg-gray-100 px-1 rounded">sudo reboot</code>. The Pi will restart and come back online in a minute or two.</p>
@@ -308,7 +309,7 @@
             <div id="result-reboot" class="hidden"></div>
 
             <!-- Shutdown -->
-            <div class="flex items-start justify-between gap-4 pt-4 border-t border-gray-100">
+            <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4 pt-4 border-t border-gray-100">
                 <div>
                     <p class="text-sm font-medium text-gray-900">Shut down</p>
                     <p class="text-xs text-gray-500 mt-0.5">Runs <code class="bg-gray-100 px-1 rounded">sudo poweroff</code>. The Pi will power off and must be unplugged/replugged (or power-cycled) to turn back on.</p>
@@ -979,26 +980,31 @@
     loadGitInfo();
     loadBranches();
 
-    // Plugin health: initial load + periodic refresh. Guard against duplicate
-    // timers if this partial is re-swapped in by HTMX; the handler re-resolves
-    // DOM nodes by id each tick.
-    refreshPluginHealth(false);
-    if (!window._pluginHealthTimer) {
-        window._pluginHealthTimer = setInterval(function () { refreshPluginHealth(true); }, 15000);
+    // Plugin health (15s) and system diagnostics (10s): the partial stays in
+    // the DOM (hidden via x-show) when another tab is active, so both polls
+    // run only while the Tools tab is active and the page is visible — each
+    // restarts with an immediate refresh. LEDVisibility keys the registration,
+    // so a partial re-swapped in by HTMX replaces (not stacks) the timers.
+    function stopToolsPolling() {
+        if (window._pluginHealthTimer) { clearInterval(window._pluginHealthTimer); window._pluginHealthTimer = null; }
+        if (window._diagPollInterval) { clearInterval(window._diagPollInterval); window._diagPollInterval = null; }
     }
-
-    // System diagnostics: load now, then refresh every 10s. Clear any prior
-    // interval so re-swapping the partial doesn't stack. The recurring poll is
-    // gated on visibility — the partial stays in the DOM (hidden via x-show)
-    // when another tab is active, so without this it would keep hitting
-    // /api/v3/system/status every 10s and churn the Pi while off-screen.
-    if (window._diagPollInterval) clearInterval(window._diagPollInterval);
-    window.loadSystemDiagnostics();
-    window._diagPollInterval = setInterval(function () {
-        const panel = document.getElementById('diag-panel');
-        if (!panel || document.hidden || panel.offsetParent === null) return;
+    function startToolsPolling() {
+        stopToolsPolling();
+        refreshPluginHealth(false);
+        window._pluginHealthTimer = setInterval(function () { refreshPluginHealth(true); }, 15000);
         window.loadSystemDiagnostics();
-    }, 10000);
+        window._diagPollInterval = setInterval(function () {
+            const panel = document.getElementById('diag-panel');
+            if (!panel || document.hidden || panel.offsetParent === null) return;
+            window.loadSystemDiagnostics();
+        }, 10000);
+    }
+    if (window.LEDVisibility) {
+        window.LEDVisibility.onActive('tools', startToolsPolling, stopToolsPolling);
+    } else {
+        startToolsPolling();
+    }
 
     // WiFi radio current state.
     window.loadWifiRadio();
@@ -1223,7 +1229,7 @@
 
         const active = status.running ? `
             <div class="rounded-md border border-amber-300 bg-amber-50 p-3">
-                <div class="flex items-start justify-between gap-4">
+                <div class="flex flex-wrap sm:flex-nowrap items-start justify-between gap-4">
                     <div>
                         <p class="text-sm font-medium text-amber-900">
                             <i class="fas fa-circle-notch fa-spin mr-1"></i>
diff --git a/web_interface/templates/v3/partials/wifi.html b/web_interface/templates/v3/partials/wifi.html
index f6478aa3..fd3e8923 100644
--- a/web_interface/templates/v3/partials/wifi.html
+++ b/web_interface/templates/v3/partials/wifi.html
@@ -159,6 +159,9 @@
                 </div>
                 <div class="flex-shrink-0">
                     <button type="button"
+                            role="switch"
+                            aria-label="Auto-Enable AP Mode"
+                            :aria-checked="status.auto_enable_ap_mode ? 'true' : 'false'"
                             @click="toggleAutoEnable(!status.auto_enable_ap_mode)"
                             :class="status.auto_enable_ap_mode 
                                    ? 'bg-blue-600 hover:bg-blue-700' 
diff --git a/web_interface/widget_bundle.py b/web_interface/widget_bundle.py
new file mode 100644
index 00000000..f37dbcc0
--- /dev/null
+++ b/web_interface/widget_bundle.py
@@ -0,0 +1,107 @@
+"""Single-request bundle for the config-form widget scripts.
+
+Every page used to carry one <script> tag per widget (34 of them, ~700 KB
+uncompressed). On a Pi Zero 2 W serving a phone over WiFi, each tag is a
+separate request the Python server has to answer. The files are plain scripts
+that register themselves on window/LEDMatrixWidgets at load time, so
+concatenating them in the same order is exactly equivalent to loading them
+one by one — no module wrapper, no scope change.
+
+The individual files stay on disk and keep working as direct URLs, which is
+what plugin-loader.js and any third-party page expect.
+
+BUNDLE_ORDER is the authority for which widgets ship; test_widget_scripts.py
+checks it against the directory so a new widget can't be forgotten.
+"""
+import hashlib
+from pathlib import Path
+from threading import Lock
+
+WIDGETS_DIR = Path(__file__).parent / "static" / "v3" / "js" / "widgets"
+
+# Load order matters: the registry and base class must exist before the
+# widgets that call them, and notification.js owns window.showNotification.
+BUNDLE_ORDER = [
+    "registry.js",
+    "base-widget.js",
+    "notification.js",
+    "plugin-order-list.js",
+    "file-upload.js",
+    "checkbox-group.js",
+    "custom-feeds.js",
+    "array-table.js",
+    "google-calendar-picker.js",
+    "google-oauth.js",
+    "day-selector.js",
+    "time-range.js",
+    "time-picker.js",
+    "file-upload-single.js",
+    "plugin-file-manager.js",
+    "schedule-picker.js",
+    # Basic input widgets
+    "text-input.js",
+    "number-input.js",
+    "textarea.js",
+    "select-dropdown.js",
+    "font-selector.js",
+    "style-editor.js",
+    "toggle-switch.js",
+    "radio-group.js",
+    "date-picker.js",
+    "slider.js",
+    "color-picker.js",
+    "email-input.js",
+    "url-input.js",
+    "password-input.js",
+    "timezone-selector.js",
+    "plugin-loader.js",
+    # Reusable JSON file manager (used via x-widget: json-file-manager)
+    "json-file-manager.js",
+]
+
+# Widget files that must NOT be bundled, with the reason.
+EXCLUDED = {
+    # Documentation example (docs/widget-guide.md); it registers the name
+    # 'color-picker' and would shadow the real color-picker.js.
+    "example-color-picker.js": "documentation example",
+}
+
+_lock = Lock()
+_cache = {"version": None, "body": None}
+
+
+def bundle_paths():
+    """Widget files in load order (only those present on disk)."""
+    return [WIDGETS_DIR / name for name in BUNDLE_ORDER if (WIDGETS_DIR / name).is_file()]
+
+
+def bundle_version():
+    """Cache-busting token: a fingerprint of every bundled file.
+
+    Uses each file's name, nanosecond mtime and size, so an edit that lands
+    in the same second as another file's, or leaves mtime behind the newest
+    file, still changes the token (and the URL).
+    """
+    digest = hashlib.sha256()
+    for path in bundle_paths():
+        stat = path.stat()
+        digest.update(f"{path.name}:{stat.st_mtime_ns}:{stat.st_size};".encode())
+    return digest.hexdigest()[:12]
+
+
+def build_bundle():
+    """Concatenated widget sources, rebuilt only when a file changes."""
+    version = bundle_version()
+    with _lock:
+        if _cache["version"] == version and _cache["body"] is not None:
+            return _cache["body"], version
+        parts = []
+        for path in bundle_paths():
+            source = path.read_text(encoding="utf-8")
+            # A file ending in a line comment would swallow the next file's
+            # first line, and a missing semicolon can join two statements.
+            parts.append("/* %s */\n%s\n;\n" % (path.name, source))
+        body = "".join(parts)
+        _cache["version"] = version
+        _cache["body"] = body
+        return body, version