feat: migrate prosapp_web_app from Firebase to NestJS API

- Replace Firebase Auth with JWT stored in SharedPreferences
- Replace Firestore with REST API calls via new ApiService
- Replace Firebase Storage with POST /storage/upload
- Remove firebase_auth, firebase_core, cloud_firestore,
  firebase_storage, firebase_messaging, google_sign_in deps
- Add api_service.dart as central HTTP client

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/main.dart

@@ -8,7 +8,6 @@ import 'package:prosappco/src/providers/user_provider.dart';
 import 'package:prosappco/src/presentation/screens/calendar.dart';
 import 'package:prosappco/src/presentation/screens/city.dart';
 import 'package:prosappco/src/presentation/screens/login/login.dart';
-import 'package:firebase_core/firebase_core.dart';
 import 'package:prosappco/src/presentation/screens/login/login_email.dart';
 import 'package:prosappco/src/presentation/screens/my_services.dart';
 import 'package:prosappco/src/presentation/screens/my_services_pro.dart';
@@ -24,46 +23,14 @@ import 'package:prosappco/src/presentation/screens/request_sent.dart';
 import 'package:prosappco/src/presentation/screens/reset_password/reset_password.dart';
 import 'package:prosappco/src/presentation/screens/map/service.dart';
 import 'package:prosappco/src/presentation/screens/solicitudes.dart';
-import 'package:prosappco/src/services/local_notifications.dart';
-import 'firebase_options.dart';
-import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart' show kIsWeb;
 import 'package:provider/provider.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 
-Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
-  await Firebase.initializeApp();
-
-  print('Handling a backdround message: ${message.messageId}');
-}
-
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await Firebase.initializeApp(
-    options: DefaultFirebaseOptions.currentPlatform,
-  ).then((value) => Get.put(AuthenticationRepository()));
 
-  // Evitar la solicitud de permiso en la versión web
-  if (!kIsWeb) {
-    FirebaseMessaging messaging = FirebaseMessaging.instance;
-
-    await messaging.requestPermission(
-      alert: true,
-      announcement: false,
-      badge: true,
-      carPlay: false,
-      criticalAlert: false,
-      provisional: false,
-      sound: true,
-    );
-
-    FirebaseMessaging.onBackgroundMessage(
-        (_firebaseMessagingBackgroundHandler));
-
-    FirebaseMessaging.onMessage.listen((RemoteMessage message) {});
-  }
-
-  await initNotifications();
+  Get.put(AuthenticationRepository());
 
   await initializeDateFormatting('es_MX', null);
 
@@ -82,9 +49,7 @@ class MyApp extends StatelessWidget {
   Widget build(BuildContext context) {
     return MultiProvider(
       providers: [
-        ChangeNotifierProvider(
-          create: (_) => UserProvider(),
-        ),
+        ChangeNotifierProvider(create: (_) => UserProvider()),
       ],
       child: GetMaterialApp(
         theme: ThemeData(fontFamily: 'Poppins'),
@@ -94,9 +59,7 @@ class MyApp extends StatelessWidget {
           GlobalWidgetsLocalizations.delegate,
           GlobalCupertinoLocalizations.delegate,
         ],
-        supportedLocales: const [
-          Locale('es', 'US'),
-        ],
+        supportedLocales: const [Locale('es', 'US')],
         title: 'ProsApp',
         initialRoute: '/',
         routes: {
@@ -108,8 +71,7 @@ class MyApp extends StatelessWidget {
           '/city': (context) => const CityScreen(),
           '/profession': (context) => const ProfessionScreen(),
           '/newNumber': (context) => const NewNumberScreen(),
-          '/profesionalRevision': (context) =>
-              const ProfessionalRevisionScreen(),
+          '/profesionalRevision': (context) => const ProfessionalRevisionScreen(),
           '/profesionalProfile': (context) => const ProfessionalProfileScreen(),
           '/solicitudEnviada': (context) => const RequestSentScreen(),
           '/nuevaPassword': (context) => NewPasswordScreen(),
@@ -142,7 +104,6 @@ class _SplashScreenState extends State<SplashScreen> {
   void initState() {
     super.initState();
     if (kIsWeb) {
-      // Espera 3 segundos y luego redirige a LoginScreen
       Future.delayed(const Duration(seconds: 3), () {
         Navigator.pushReplacement(
           context,
@@ -162,11 +123,3 @@ class _SplashScreenState extends State<SplashScreen> {
     );
   }
 }
-
-
-
-      // splash: 'images/splashgif.gif',
-      // backgroundColor: Colors.black,
-      // nextScreen: const LoginScreen(),
-      // splashIconSize: 50,
-      // duration: 80000,