Add header quick links with CRUD management and icon enhancements

- Add LinkConfig model and links field to settings
- Add CRUD API endpoints for links (list/create/update/delete)
- Add Links management tab in WebUI with add/edit/delete dialogs
- Add live icon preview in Link and Script dialog forms
- Show MDI icons inline in Quick Actions cards, Scripts table, Links table
- Add broadcast_links_changed WebSocket event for live updates
- Add EN/RU translations for all links management strings

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

media_server/main.py

@@ -16,7 +16,7 @@ from fastapi.staticfiles import StaticFiles
 from . import __version__
 from .auth import get_token_label, token_label_var
 from .config import settings, generate_default_config, get_config_dir
-from .routes import audio_router, browser_router, callbacks_router, display_router, health_router, media_router, scripts_router
+from .routes import audio_router, browser_router, callbacks_router, display_router, health_router, links_router, media_router, scripts_router
 from .services import get_media_controller
 from .services.websocket_manager import ws_manager
 
@@ -118,6 +118,7 @@ def create_app() -> FastAPI:
     app.include_router(callbacks_router)
     app.include_router(display_router)
     app.include_router(health_router)
+    app.include_router(links_router)
     app.include_router(media_router)
     app.include_router(scripts_router)