flutter(rider): rebuild lib on Cubit/Bloc + Tripz backend (core + auth slice)

- keep store identity (com.mobileapp.store.ride, shorebird, firebase, fonts); old lib -> lib_old_getx
- core: config/di/router(go_router)/theme/api_client(dio+tenant+bearer)/token_store(secure)
- auth: repo + AuthCubit + OTP phone/otp screens; home: flutter_map (OSM placeholder, انطلق TODO)
- android usesCleartextTraffic=true for http API; maps=flutter_map (no Google), state=Cubit

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/rider/lib/core/storage/token_store.dart

@@ -0,0 +1,15 @@
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+/// تخزين آمن للتوكنات (access + refresh).
+class TokenStore {
+  final FlutterSecureStorage _s = const FlutterSecureStorage();
+
+  Future<void> save(String access, String refresh) async {
+    await _s.write(key: 'access_token', value: access);
+    await _s.write(key: 'refresh_token', value: refresh);
+  }
+
+  Future<String?> access() => _s.read(key: 'access_token');
+  Future<String?> refresh() => _s.read(key: 'refresh_token');
+  Future<void> clear() => _s.deleteAll();
+}