feat: Home Assistant integration — WebSocket connection, automation conditions, UI

Add full Home Assistant integration via WebSocket API:
- HARuntime: persistent WebSocket client with auth, auto-reconnect, entity state cache
- HAManager: ref-counted runtime pool (like WeatherManager)
- HomeAssistantCondition: new automation trigger type matching entity states
- REST API: CRUD for HA sources + /test, /entities, /status endpoints
- /api/v1/system/integrations-status: combined MQTT + HA dashboard indicators
- Frontend: HA Sources tab in Streams, condition type in automation editor
- Modal editor with host, token, SSL, entity filters
- websockets>=13.0 dependency added

server/src/wled_controller/static/locales/en.json

@@ -1784,6 +1784,43 @@
     "weather_source.geo.error": "Geolocation failed",
     "weather_source.geo.not_supported": "Geolocation is not supported by your browser",
     "streams.group.weather": "Weather",
+    "streams.group.home_assistant": "Home Assistant",
+    "ha_source.group.title": "Home Assistant Sources",
+    "ha_source.add": "Add Home Assistant Source",
+    "ha_source.edit": "Edit Home Assistant Source",
+    "ha_source.name": "Name:",
+    "ha_source.name.placeholder": "My Home Assistant",
+    "ha_source.name.hint": "A descriptive name for this Home Assistant connection",
+    "ha_source.host": "Host:",
+    "ha_source.host.hint": "Home Assistant host and port, e.g. 192.168.1.100:8123",
+    "ha_source.token": "Access Token:",
+    "ha_source.token.hint": "Long-Lived Access Token from HA (Profile > Security > Long-Lived Access Tokens)",
+    "ha_source.token.edit_hint": "Leave blank to keep the current token",
+    "ha_source.use_ssl": "Use SSL (wss://)",
+    "ha_source.entity_filters": "Entity Filters (optional):",
+    "ha_source.entity_filters.hint": "Comma-separated glob patterns, e.g. sensor.*, binary_sensor.front_door. Leave empty for all.",
+    "ha_source.description": "Description (optional):",
+    "ha_source.test": "Test Connection",
+    "ha_source.test.success": "Connected",
+    "ha_source.test.failed": "Connection failed",
+    "ha_source.connected": "Connected",
+    "ha_source.disconnected": "Disconnected",
+    "ha_source.error.name_required": "Name is required",
+    "ha_source.error.host_required": "Host is required",
+    "ha_source.error.token_required": "Access token is required",
+    "ha_source.error.load": "Failed to load Home Assistant source",
+    "ha_source.created": "Home Assistant source created",
+    "ha_source.updated": "Home Assistant source updated",
+    "ha_source.deleted": "Home Assistant source deleted",
+    "ha_source.delete.confirm": "Delete this Home Assistant connection?",
+    "section.empty.ha_sources": "No Home Assistant sources yet. Click + to add one.",
+    "automations.condition.home_assistant": "Home Assistant",
+    "automations.condition.home_assistant.desc": "HA entity state",
+    "automations.condition.home_assistant.ha_source": "HA Source:",
+    "automations.condition.home_assistant.entity_id": "Entity ID:",
+    "automations.condition.home_assistant.state": "State:",
+    "automations.condition.home_assistant.match_mode": "Match Mode:",
+    "automations.condition.home_assistant.hint": "Activate when a Home Assistant entity matches the specified state",
     "color_strip.clock": "Sync Clock:",
     "color_strip.clock.hint": "Link to a sync clock to synchronize animation timing across sources. Speed is controlled on the clock.",
     "graph.title": "Graph",