fix: Resolve Dart type inference errors and update Android build configuration for Gradle 8.14

Type Annotation Fixes:
- fireNotificationList.dart: Added DeleteFireNotificationFunction and TapFireNotificationFunction types to _buildRow and _buildSavedFireNotifications parameters
- homePage.dart: Added Object type to catchError handler parameters
- redux/appReducer.dart: Added dynamic type annotation to action parameter
- redux/fetchDataMiddleware.dart: Added explicit type annotations and improved type casting
- redux/reducers.dart: Added dynamic type annotation to action parameter
- redux/userReducer.dart: Added dynamic type annotation to action parameter

Android Build Configuration Updates:
- Updated compileSdkVersion and targetSdkVersion from 34 to 36 to match plugin requirements
- Moved plugins {} block to first position (Gradle 8.14 requirement)
- Added dev.flutter.flutter-gradle-plugin to plugins block for modern Flutter integration
- Removed deprecated useProguard setting, replaced with shrinkResources
- Disabled Jetifier (android.enableJetifier=false) to improve build performance
- Increased JVM heap allocation to 4096M for large project compilation
- Added Kotlin language version 1.8 override for plugin compatibility
- Added ProGuard rules to exclude optional Google Play Core classes

Build Results:
- ✅ APK builds successfully (146MB debug APK)
- ✅ Zero type inference errors detected by dart analyze
- ✅ Kotlin compilation passes
- ✅ R8 minification configured correctly
- ✅ 301 remaining issues are all INFO-level style suggestions (non-blocking)

lib/redux/userReducer.dart

@@ -1,8 +1,9 @@
 import '../models/user.dart';
 import 'actions.dart';
 
-User userReducer(User user, action) {
-  if (action is OnUserCreatedAction) return user.copyWith(userId: action.userId);
+User userReducer(User user, dynamic action) {
+  if (action is OnUserCreatedAction)
+    return user.copyWith(userId: action.userId);
   if (action is OnUserTokenAction) return user.copyWith(token: action.token);
   if (action is OnUserLangAction) return user.copyWith(lang: action.lang);
   return user;