Fix CI on main: RouteMap typecheck + metro.config lint

- RouteMap.tsx referenced undefined MapLibreRN namespace, causing
  typecheck to fail on main and in every downstream PR
- metro.config.js is CommonJS, exclude from ESLint flat config

Changes that were pushed directly to main earlier bypassed CI and
broke both typecheck and lint.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/mobile/lib/editor/RouteMap.tsx

@@ -65,7 +65,7 @@ function RouteMapInner({
   onWaypointPress,
 }: RouteMapProps) {
   const ML = MapLibreGL!;
-  const cameraRef = useRef<MapLibreRN.CameraRef>(null);
+  const cameraRef = useRef<MapLibreGL.CameraRef>(null);
 
   const handleLongPress = useCallback(
     // eslint-disable-next-line @typescript-eslint/no-explicit-any