chore(deps): remove packages nothing imports, declare direct imports, move mypy to test deps

Removed from requirements.txt: python-socketio, python-engineio,
websockets, websocket-client — zero imports anywhere in this repo, and
the one store plugin that needs Socket.IO (ledmatrix-music) declares it
in its own requirements.txt, which the plugin store installs. Removed
the same quartet plus timezonefinder, geopy, google-auth-oauthlib,
google-auth-httplib2, google-api-python-client, unidecode, icalevents,
python-dateutil, flask-wtf and the werkzeug pin from
web_interface/requirements.txt — all leftovers from the deleted built-in
weather/calendar/music displays (flask-wtf was doubly dead: app.py
explicitly disables CSRF and sets csrf=None). scripts/
install_dependencies_apt.py, which mirrors these lists for the
first-time installer, drops the same packages.

Added: urllib3 (imported directly in four core modules), jinja2 and
markupsafe (imported directly in pages_v3.py) — previously reachable
only as transitives. mypy moves from runtime requirements to
requirements-test.txt.

Verified in a fresh venv: all four requirements files co-install, pip
check is clean, the full CI-enrolled suite (907 tests) and a Flask boot
smoke pass with the trimmed dependency set.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SXb4mKcAkVaxkeTb3YnAdr

scripts/install_dependencies_apt.py

@@ -49,12 +49,7 @@ def install_via_apt(package_name: str) -> Tuple[bool, str]:
         'werkzeug': 'python3-werkzeug',
         'numpy': 'python3-numpy',
         'requests': 'python3-requests',
-        'python-dateutil': 'python3-dateutil',
-        'pytz': 'python3-tz',
-        'geopy': 'python3-geopy',
-        'unidecode': 'python3-unidecode',
-        'websockets': 'python3-websockets',
-        'websocket-client': 'python3-websocket-client'
+        'pytz': 'python3-tz'
     }
 
     apt_package = apt_package_map.get(package_name, f'python3-{package_name}')
@@ -152,12 +147,7 @@ def main():
         'werkzeug',
         'numpy',
         'requests',
-        'python-dateutil',
-        'pytz',
-        'geopy',
-        'unidecode',
-        'websockets',
-        'websocket-client'
+        'pytz'
     ]
 
     failed_packages = []
@@ -177,15 +167,12 @@ def main():
                 failure_details[package] = pip_output or apt_output
 
     # Install packages that don't have apt equivalents
+    # Packages without apt equivalents. Plugin-specific dependencies
+    # (timezonefinder, google-api stack, icalevents, socketio, ...) are
+    # no longer installed here — store plugins declare their own
+    # requirements.txt, which the plugin store installs.
     special_packages = [
-        'timezonefinder>=6.5.0,<7.0.0',
-        'google-auth-oauthlib>=1.2.0,<2.0.0',
-        'google-auth-httplib2>=0.2.0,<1.0.0',
-        'google-api-python-client>=2.147.0,<3.0.0',
         'spotipy',
-        'icalevents',
-        'python-socketio>=5.11.0,<6.0.0',
-        'python-engineio>=4.9.0,<5.0.0'
     ]
 
     for package in special_packages: