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/e2e/conftest.py

@@ -14,7 +14,7 @@ import pytest
 # ---------------------------------------------------------------------------
 # Isolate e2e tests from production data.
 #
-# We must set the config singleton BEFORE wled_controller.main is imported,
+# We must set the config singleton BEFORE ledgrab.main is imported,
 # because main.py reads get_config() at module level to create the DB and
 # all stores.  By forcing the singleton here we guarantee the app opens a
 # throwaway SQLite file in a temp directory.
@@ -24,7 +24,7 @@ _e2e_tmp = Path(tempfile.mkdtemp(prefix="wled_e2e_"))
 _test_db_path = str(_e2e_tmp / "test_ledgrab.db")
 _test_assets_dir = str(_e2e_tmp / "test_assets")
 
-import wled_controller.config as _config_mod  # noqa: E402
+import ledgrab.config as _config_mod  # noqa: E402
 
 # Build a Config that mirrors production settings but with isolated paths.
 _original_config = _config_mod.Config.load()
@@ -54,7 +54,7 @@ def _test_client():
     tests complete.  The app uses the isolated test database set above.
     """
     from fastapi.testclient import TestClient
-    from wled_controller.main import app
+    from ledgrab.main import app
 
     with TestClient(app, raise_server_exceptions=False) as c:
         yield c
@@ -80,12 +80,14 @@ def _clear_stores():
     """Remove all entities from all stores for test isolation."""
     # Reset frozen-writes flags that restore flows set.
     # Without this, subsequent tests can't persist data.
-    from wled_controller.storage.base_store import unfreeze_saves
+    from ledgrab.storage.base_store import unfreeze_saves
+
     unfreeze_saves()
-    import wled_controller.storage.database as _db_mod
+    import ledgrab.storage.database as _db_mod
+
     _db_mod._writes_frozen = False
 
-    from wled_controller.api import dependencies as deps
+    from ledgrab.api import dependencies as deps
 
     store_clearers = [
         (deps.get_device_store, "get_all_devices", "delete_device"),