feat(mobile): Implement Keycloak WebView authentication with HTTP callback

- Replace flutter_appauth with custom WebView implementation to resolve deep link issues
- Add KeycloakWebViewAuthService with integrated WebView for seamless authentication
- Configure Android manifest for HTTP cleartext traffic support
- Add network security config for development environment (192.168.1.11)
- Update Keycloak client to use HTTP callback endpoint (http://192.168.1.11:8080/auth/callback)
- Remove obsolete keycloak_auth_service.dart and temporary scripts
- Clean up dependencies and regenerate injection configuration
- Tested successfully on multiple Android devices (Xiaomi 2201116TG, SM A725F)

BREAKING CHANGE: Authentication flow now uses WebView instead of external browser
- Users will see Keycloak login page within the app instead of browser redirect
- Resolves ERR_CLEARTEXT_NOT_PERMITTED and deep link state management issues
- Maintains full OIDC compliance with PKCE flow and secure token storage

Technical improvements:
- WebView with custom navigation delegate for callback handling
- Automatic token extraction and user info parsing from JWT
- Proper error handling and user feedback
- Consistent authentication state management across app lifecycle

unionflow-mobile-apps/lib/main.dart

@@ -1,14 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:intl/date_symbol_data_local.dart';
 
-import 'core/auth/bloc/temp_auth_bloc.dart';
-import 'core/auth/bloc/auth_event.dart';
-import 'core/auth/services/temp_auth_service.dart';
+
+import 'core/auth/presentation/auth_wrapper.dart';
 import 'core/di/injection.dart';
 import 'shared/theme/app_theme.dart';
-import 'app.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -19,6 +16,8 @@ void main() async {
   // Configuration de l'injection de dépendances
   await configureDependencies();
 
+  // Le service d'authentification WebView s'initialise automatiquement
+
   // Configuration du système
   await _configureApp();
 
@@ -51,38 +50,30 @@ class UnionFlowApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return BlocProvider<TempAuthBloc>(
-      create: (context) {
-        final authService = TempAuthService();
-        final authBloc = TempAuthBloc(authService);
-        authBloc.add(const AuthInitializeRequested());
-        return authBloc;
+    return MaterialApp(
+      title: 'UnionFlow',
+      debugShowCheckedModeBanner: false,
+
+      // Configuration du thème
+      theme: AppTheme.lightTheme,
+      darkTheme: AppTheme.darkTheme,
+      themeMode: ThemeMode.system,
+
+      // Configuration de la localisation
+      locale: const Locale('fr', 'FR'),
+
+      // Application principale
+      home: const AuthWrapper(),
+
+      // Builder global pour gérer les erreurs
+      builder: (context, child) {
+        return MediaQuery(
+          data: MediaQuery.of(context).copyWith(
+            textScaler: const TextScaler.linear(1.0),
+          ),
+          child: child ?? const SizedBox(),
+        );
       },
-      child: MaterialApp(
-        title: 'UnionFlow',
-        debugShowCheckedModeBanner: false,
-
-        // Configuration du thème
-        theme: AppTheme.lightTheme,
-        darkTheme: AppTheme.darkTheme,
-        themeMode: ThemeMode.system,
-
-        // Configuration de la localisation
-        locale: const Locale('fr', 'FR'),
-
-        // Application principale
-        home: const AppWrapper(),
-
-        // Builder global pour gérer les erreurs
-        builder: (context, child) {
-          return MediaQuery(
-            data: MediaQuery.of(context).copyWith(
-              textScaler: const TextScaler.linear(1.0),
-            ),
-            child: child ?? const SizedBox(),
-          );
-        },
-      ),
     );
   }
 }