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/storage/test_sync_clock_store.py

@@ -2,8 +2,8 @@
 
 import pytest
 
-from wled_controller.storage.sync_clock import SyncClock
-from wled_controller.storage.sync_clock_store import SyncClockStore
+from ledgrab.storage.sync_clock import SyncClock
+from ledgrab.storage.sync_clock_store import SyncClockStore
 
 
 @pytest.fixture
@@ -54,9 +54,7 @@ class TestSyncClockStoreCRUD:
         assert store.count() == 1
 
     def test_create_clock_with_options(self, store):
-        c = store.create_clock(
-            name="Fast", speed=5.0, description="speedy", tags=["anim"]
-        )
+        c = store.create_clock(name="Fast", speed=5.0, description="speedy", tags=["anim"])
         assert c.speed == 5.0
         assert c.description == "speedy"
         assert c.tags == ["anim"]
@@ -149,7 +147,8 @@ class TestSyncClockNameUniqueness:
 
 class TestSyncClockPersistence:
     def test_persist_and_reload(self, tmp_path):
-        from wled_controller.storage.database import Database
+        from ledgrab.storage.database import Database
+
         db = Database(tmp_path / "sc_persist.db")
         s1 = SyncClockStore(db)
         c = s1.create_clock(name="Persist", speed=2.5)