Add tags to all entity types with chip-based input and autocomplete

- Add `tags: List[str]` field to all 13 entity types (devices, output targets,
  CSS sources, picture sources, audio sources, value sources, sync clocks,
  automations, scene presets, capture/audio/PP/pattern templates)
- Update all stores, schemas, and route handlers for tag CRUD
- Add GET /api/v1/tags endpoint aggregating unique tags across all stores
- Create TagInput component with chip display, autocomplete dropdown,
  keyboard navigation, and API-backed suggestions
- Display tag chips on all entity cards (searchable via existing text filter)
- Add tag input to all 14 editor modals with dirty check support
- Add CSS styles and i18n keys (en/ru/zh) for tag UI
- Also includes code review fixes: thread safety, perf, store dedup

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/api/schemas/automations.py

@@ -39,6 +39,7 @@ class AutomationCreate(BaseModel):
     scene_preset_id: Optional[str] = Field(None, description="Scene preset to activate")
     deactivation_mode: str = Field(default="none", description="'none', 'revert', or 'fallback_scene'")
     deactivation_scene_preset_id: Optional[str] = Field(None, description="Scene preset for fallback deactivation")
+    tags: List[str] = Field(default_factory=list, description="User-defined tags")
 
 
 class AutomationUpdate(BaseModel):
@@ -51,6 +52,7 @@ class AutomationUpdate(BaseModel):
     scene_preset_id: Optional[str] = Field(None, description="Scene preset to activate")
     deactivation_mode: Optional[str] = Field(None, description="'none', 'revert', or 'fallback_scene'")
     deactivation_scene_preset_id: Optional[str] = Field(None, description="Scene preset for fallback deactivation")
+    tags: Optional[List[str]] = None
 
 
 class AutomationResponse(BaseModel):
@@ -64,6 +66,7 @@ class AutomationResponse(BaseModel):
     scene_preset_id: Optional[str] = Field(None, description="Scene preset to activate")
     deactivation_mode: str = Field(default="none", description="Deactivation behavior")
     deactivation_scene_preset_id: Optional[str] = Field(None, description="Fallback scene preset")
+    tags: List[str] = Field(default_factory=list, description="User-defined tags")
     webhook_url: Optional[str] = Field(None, description="Webhook URL for the first webhook condition (if any)")
     is_active: bool = Field(default=False, description="Whether the automation is currently active")
     last_activated_at: Optional[datetime] = Field(None, description="Last time this automation was activated")