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

build-dist.sh

@@ -83,12 +83,12 @@ set -euo pipefail
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 
 export PYTHONPATH="$SCRIPT_DIR/app/src"
-export WLED_CONFIG_PATH="$SCRIPT_DIR/app/config/default_config.yaml"
+export LEDGRAB_CONFIG_PATH="$SCRIPT_DIR/app/config/default_config.yaml"
 
 mkdir -p "$SCRIPT_DIR/data" "$SCRIPT_DIR/logs"
 
 source "$SCRIPT_DIR/venv/bin/activate"
-exec python -m wled_controller.main
+exec python -m ledgrab.main
 LAUNCHER
 
 sed -i "s/VERSION_PLACEHOLDER/${VERSION_CLEAN}/" "$DIST_DIR/run.sh"