refactor: rename project to LedGrab, split HA integration into separate repo

- Rename Python package: wled_controller -> ledgrab
- Rename env var prefix: WLED_ -> LEDGRAB_ (with auto-migration for old vars)
- Rename localStorage key: wled_api_key -> ledgrab_api_key (with migration)
- Rename HA integration domain: wled_screen_controller -> ledgrab
- Update all imports, build scripts, Docker, installer, config, docs
- Remove HA integration (moved to ledgrab-haos-integration repo)
- Remove hacs.json (belongs in HA repo now)
- Add startup warning for users with old WLED_ env vars
- All tests pass (715/715), ruff clean, tsc clean, frontend builds

server/tests/api/routes/test_devices_routes.py

@@ -10,11 +10,11 @@ import pytest
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-from wled_controller.api.routes.devices import router
-from wled_controller.storage.device_store import Device, DeviceStore
-from wled_controller.storage.output_target_store import OutputTargetStore
-from wled_controller.core.processing.processor_manager import ProcessorManager
-from wled_controller.api import dependencies as deps
+from ledgrab.api.routes.devices import router
+from ledgrab.storage.device_store import Device, DeviceStore
+from ledgrab.storage.output_target_store import OutputTargetStore
+from ledgrab.core.processing.processor_manager import ProcessorManager
+from ledgrab.api import dependencies as deps
 
 
 # ---------------------------------------------------------------------------
@@ -31,7 +31,8 @@ def _make_app():
 
 @pytest.fixture
 def _route_db(tmp_path):
-    from wled_controller.storage.database import Database
+    from ledgrab.storage.database import Database
+
     db = Database(tmp_path / "test.db")
     yield db
     db.close()
@@ -64,7 +65,8 @@ def client(device_store, output_target_store, processor_manager):
     app = _make_app()
 
     # Override auth to always pass
-    from wled_controller.api.auth import verify_api_key
+    from ledgrab.api.auth import verify_api_key
+
     app.dependency_overrides[verify_api_key] = lambda: "test-user"
 
     # Override stores and manager