feat: BLoC tests complets + sécurité production + freerasp 7.5.1 migration

## Tests BLoC (Task P2.4 Mobile)
- 25 nouveaux fichiers *_bloc_test.dart + mocks générés (build_runner)
- Features couvertes : authentication, admin_users, adhesions, backup,
  communication/messaging, contributions, dashboard, finance (approval/budget),
  events, explore/network, feed, logs_monitoring, notifications, onboarding,
  organizations (switcher/types/CRUD), profile, reports, settings, solidarity
- ~380 tests, > 80% coverage BLoCs

## Sécurité Production (Task P2.2)
- lib/core/security/app_integrity_service.dart (freerasp 7.5.1)
- Migration API breaking changes freerasp 7.5.1 :
  - onRootDetected → onPrivilegedAccess
  - onDebuggerDetected → onDebug
  - onSignatureDetected → onAppIntegrity
  - onHookDetected → onHooks
  - onEmulatorDetected → onSimulator
  - onUntrustedInstallationSourceDetected → onUnofficialStore
  - onDeviceBindingDetected → onDeviceBinding
  - onObfuscationIssuesDetected → onObfuscationIssues
  - Talsec.start() split → start() + attachListener()
  - const AndroidConfig/IOSConfig → final (constructors call ConfigVerifier)
  - supportedAlternativeStores → supportedStores

## Pubspec
- bloc_test: ^9.1.7 → ^10.0.0 (compat flutter_bloc ^9.0.0)
- freerasp 7.5.1

## Config
- android/app/build.gradle : ajustements release
- lib/core/config/environment.dart : URLs API actualisées
- lib/main.dart + app_router : intégrations sécurité/BLoC

## Cleanup
- Suppression docs intermédiaires (TACHES_*.md, TASK_*_COMPLETION_REPORT.md,
  TESTS_UNITAIRES_PROGRESS.md)
- .g.dart régénérés (json_serializable)
- .mocks.dart régénérés (mockito)

## Résultat
- 142 fichiers, +27 596 insertions
- Toutes les tâches P2 mobile complétées

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lib/l10n/app_localizations.dart

@@ -63,7 +63,7 @@ import 'app_localizations_fr.dart';
 /// property.
 abstract class AppLocalizations {
   AppLocalizations(String locale)
-      : localeName = intl.Intl.canonicalizedLocale(locale.toString());
+    : localeName = intl.Intl.canonicalizedLocale(locale.toString());
 
   final String localeName;
 
@@ -86,16 +86,16 @@ abstract class AppLocalizations {
   /// of delegates is preferred or required.
   static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
       <LocalizationsDelegate<dynamic>>[
-    delegate,
-    GlobalMaterialLocalizations.delegate,
-    GlobalCupertinoLocalizations.delegate,
-    GlobalWidgetsLocalizations.delegate,
-  ];
+        delegate,
+        GlobalMaterialLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+      ];
 
   /// A list of this localizations delegate's supported locales.
   static const List<Locale> supportedLocales = <Locale>[
     Locale('en'),
-    Locale('fr')
+    Locale('fr'),
   ];
 
   /// Titre de l'application
@@ -1428,8 +1428,9 @@ AppLocalizations lookupAppLocalizations(Locale locale) {
   }
 
   throw FlutterError(
-      'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
-      'an issue with the localizations generation tool. Please file an issue '
-      'on GitHub with a reproducible sample app and the gen-l10n configuration '
-      'that was used.');
+    'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
+    'an issue with the localizations generation tool. Please file an issue '
+    'on GitHub with a reproducible sample app and the gen-l10n configuration '
+    'that was used.',
+  );
 }