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_device_store.py

@@ -4,7 +4,7 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 
 import pytest
 
-from wled_controller.storage.device_store import Device, DeviceStore
+from ledgrab.storage.device_store import Device, DeviceStore
 
 
 # ---------------------------------------------------------------------------
@@ -14,7 +14,8 @@ from wled_controller.storage.device_store import Device, DeviceStore
 
 @pytest.fixture
 def tmp_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()
@@ -95,8 +96,13 @@ class TestDeviceModel:
 
     def test_to_dict_includes_non_defaults(self):
         d = Device(
-            device_id="d", name="D", url="http://x", led_count=10,
-            rgbw=True, tags=["a"], software_brightness=100,
+            device_id="d",
+            name="D",
+            url="http://x",
+            led_count=10,
+            rgbw=True,
+            tags=["a"],
+            software_brightness=100,
         )
         data = d.to_dict()
         assert data["rgbw"] is True
@@ -243,7 +249,8 @@ class TestDeviceNameUniqueness:
 
 class TestDevicePersistence:
     def test_persistence_across_instances(self, tmp_path):
-        from wled_controller.storage.database import Database
+        from ledgrab.storage.database import Database
+
         db = Database(tmp_path / "persist.db")
         s1 = DeviceStore(db)
         d = s1.create_device(name="Persist", url="http://p", led_count=77)
@@ -256,7 +263,8 @@ class TestDevicePersistence:
         db.close()
 
     def test_update_persists(self, tmp_path):
-        from wled_controller.storage.database import Database
+        from ledgrab.storage.database import Database
+
         db = Database(tmp_path / "persist2.db")
         s1 = DeviceStore(db)
         d = s1.create_device(name="Before", url="http://x", led_count=10)
@@ -274,7 +282,8 @@ class TestDevicePersistence:
 
 class TestDeviceThreadSafety:
     def test_concurrent_creates(self, tmp_path):
-        from wled_controller.storage.database import Database
+        from ledgrab.storage.database import Database
+
         db = Database(tmp_path / "conc.db")
         s = DeviceStore(db)
         errors = []