fix(web): widget cache-busting, dead frontend code, and dependency pins (#656)

- Plugin-supplied widgets load as /static/plugin-widgets/...js?v=<plugin
  version>, so an update isn't hidden behind the year-long immutable cache.
- Fire-and-forget loadInstalledPlugins() calls catch the rejection it has
  already reported, so the global handler no longer adds a second toast.
- Timezone picker renders again when the General partial is re-injected.
- Remove dead code: executePluginAction's six plugin-id fallbacks and
  [DEBUG] logging, window.currentPluginConfig and every read of it, the
  file-upload JSON delete branch, unused PluginAPI / PluginInstallManager /
  PluginStateManager helpers, loadPluginWidgetsFromManifest, the stale
  install_manager.js and LEDVisibility fallbacks, error_handler.js's global
  escapeHtml, 13 unused CSS rules, and stale comments/no-op returns.
- pytz < 2027, psutil < 7 in requirements-test.txt, pytest-cov < 8.
- Pin anthropics/claude-code-action to the commit v1 resolves to.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

web_interface/static/v3/app.css

@@ -299,8 +299,6 @@ html[data-theme="dark"] {
 .gap-x-2 { column-gap: 0.5rem; }
 .gap-x-3 { column-gap: 0.75rem; }
 .gap-x-4 { column-gap: 1rem; }
-.gap-x-6 { column-gap: 1.5rem; }
-.gap-x-8 { column-gap: 2rem; }
 .gap-y-2 { row-gap: 0.5rem; }
 
 /* Enhanced Typography */
@@ -329,7 +327,6 @@ h3 { font-size: 1.25rem; }
 h4 { font-size: 1.125rem; }
 
 .border-b { border-bottom-width: 1px; }
-.border-b-2 { border-bottom-width: 2px; }
 
 .relative { position: relative; }
 .fixed { position: fixed; }
@@ -339,14 +336,11 @@ h4 { font-size: 1.125rem; }
 .top-4 { top: 1rem; }
 .right-4 { right: 1rem; }
 
-.max-w-7xl { max-width: 56rem; }
 .max-w-full { max-width: 100%; }
 .mx-auto { margin-left: auto; margin-right: auto; }
 .overflow-x-auto { overflow-x: auto; }
 .overflow-hidden { overflow: hidden; }
 
-.aspect-video { aspect-ratio: 16 / 9; }
-
 .truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 
 .transition { transition-property: transform, opacity, color, border-color; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
@@ -530,12 +524,10 @@ a, button, input, select, textarea {
 .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; }
@@ -544,7 +536,6 @@ a, button, input, select, textarea {
 .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; }
@@ -570,7 +561,6 @@ a, button, input, select, textarea {
 .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; }
@@ -642,7 +632,6 @@ a, button, input, select, textarea {
 .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; }
@@ -666,7 +655,6 @@ a, button, input, select, textarea {
 .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; }
@@ -819,7 +807,6 @@ a, button, input, select, textarea {
 .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; }
@@ -1246,30 +1233,23 @@ button.bg-white {
 }
 
 /* Filter Pill Toggle States */
-.filter-pill,
-.category-filter-pill {
+.filter-pill {
     cursor: pointer;
     user-select: none;
     transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
 }
 
-.filter-pill[data-active="true"],
-.category-filter-pill[data-active="true"] {
+.filter-pill[data-active="true"] {
     background-color: var(--color-info-bg);
     border-color: var(--color-info);
     color: var(--color-info);
     font-weight: 600;
 }
 
-.filter-pill[data-active="true"]:hover,
-.category-filter-pill[data-active="true"]:hover {
+.filter-pill[data-active="true"]:hover {
     opacity: 0.85;
 }
 
-.category-filter-pill[data-active="true"] {
-    box-shadow: 0 0 0 1px var(--color-info);
-}
-
 /* Section Headers with Subtle Gradients */
 .section-header {
     background: linear-gradient(135deg, rgb(255 255 255 / 90%) 0%, rgb(249 250 251 / 90%) 100%);
@@ -1707,9 +1687,7 @@ button.bg-white {
 [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); }