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_webhooks_routes.py

@@ -4,7 +4,7 @@ import time
 
 import pytest
 
-from wled_controller.api.routes.webhooks import _check_rate_limit, _rate_hits
+from ledgrab.api.routes.webhooks import _check_rate_limit, _rate_hits
 
 
 # ---------------------------------------------------------------------------
@@ -25,6 +25,7 @@ class TestRateLimiter:
         for _ in range(30):
             _check_rate_limit("1.2.3.4")
         from fastapi import HTTPException
+
         with pytest.raises(HTTPException) as exc_info:
             _check_rate_limit("1.2.3.4")
         assert exc_info.value.status_code == 429
@@ -50,7 +51,7 @@ class TestRateLimiter:
 
 class TestWebhookPayload:
     def test_valid_payload_model(self):
-        from wled_controller.api.routes.webhooks import WebhookPayload
+        from ledgrab.api.routes.webhooks import WebhookPayload
 
         p = WebhookPayload(action="activate")
         assert p.action == "activate"
@@ -60,7 +61,7 @@ class TestWebhookPayload:
 
     def test_arbitrary_action_accepted_by_model(self):
         """The model accepts any string; validation is in the route handler."""
-        from wled_controller.api.routes.webhooks import WebhookPayload
+        from ledgrab.api.routes.webhooks import WebhookPayload
 
         p = WebhookPayload(action="bogus")
         assert p.action == "bogus"