feat: add auto-update system with release checking, notification UI, and install-type-aware apply

- Abstract ReleaseProvider interface (Gitea impl, swappable for GitHub/GitLab)
- Background UpdateService with periodic checks, debounce, dismissed version persistence
- Install type detection (installer/portable/docker/dev) with platform-aware asset matching
- Download with progress events, silent NSIS reinstall, portable ZIP/tarball swap scripts
- Version badge pulse animation, dismissible banner with icon buttons, Settings > Updates tab
- Single source of truth: pyproject.toml version via importlib.metadata, CI stamps tag with sed
- API: GET/POST status, check, dismiss, apply, GET/PUT settings
- i18n: en, ru, zh (27+ keys each)

server/src/wled_controller/api/dependencies.py

@@ -28,6 +28,7 @@ from wled_controller.core.automations.automation_engine import AutomationEngine
 from wled_controller.core.weather.weather_manager import WeatherManager
 from wled_controller.core.backup.auto_backup import AutoBackupEngine
 from wled_controller.core.processing.sync_clock_manager import SyncClockManager
+from wled_controller.core.update.update_service import UpdateService
 
 T = TypeVar("T")
 
@@ -134,6 +135,10 @@ def get_database() -> Database:
     return _get("database", "Database")
 
 
+def get_update_service() -> UpdateService:
+    return _get("update_service", "Update service")
+
+
 # ── Event helper ────────────────────────────────────────────────────────
 
 
@@ -181,6 +186,7 @@ def init_dependencies(
     gradient_store: GradientStore | None = None,
     weather_source_store: WeatherSourceStore | None = None,
     weather_manager: WeatherManager | None = None,
+    update_service: UpdateService | None = None,
 ):
     """Initialize global dependencies."""
     _deps.update({
@@ -206,4 +212,5 @@ def init_dependencies(
         "gradient_store": gradient_store,
         "weather_source_store": weather_source_store,
         "weather_manager": weather_manager,
+        "update_service": update_service,
     })