Add UserStateWrapper and ProfileImageService for user state management and profile image handling

lib/services/profile_image_service.dart

@@ -0,0 +1,54 @@
+import 'dart:io';
+import 'package:firebase_storage/firebase_storage.dart';
+import 'package:image_picker/image_picker.dart';
+import 'error_service.dart';
+
+class ProfileImageService {
+  static final FirebaseStorage _storage = FirebaseStorage.instance;
+  final ImagePicker _picker = ImagePicker();
+  final ErrorService _errorService = ErrorService();
+
+  Future<String?> uploadCustomProfileImage(
+    String userId,
+    XFile imageFile,
+  ) async {
+    try {
+      final ref = _storage.ref().child('profile_images').child('$userId.jpg');
+      final uploadTask = ref.putFile(File(imageFile.path));
+      final snapshot = await uploadTask;
+      return await snapshot.ref.getDownloadURL();
+    } catch (e) {
+      _errorService.logError(
+        'ProfileImageService',
+        'Erreur lors du téléchargement de l\'image de profil pour $userId: $e',
+      );
+      return null;
+    }
+  }
+
+  Future<XFile?> pickProfileImageFromGallery() async {
+    try {
+      final XFile? image = await _picker.pickImage(source: ImageSource.gallery);
+      return image;
+    } catch (e) {
+      _errorService.logError(
+        'ProfileImageService',
+        'Erreur lors de la sélection de l\'image depuis la galerie: $e',
+      );
+      return null;
+    }
+  }
+
+  Future<XFile?> takePhoto() async {
+    try {
+      final XFile? photo = await _picker.pickImage(source: ImageSource.camera);
+      return photo;
+    } catch (e) {
+      _errorService.logError(
+        'ProfileImageService',
+        'Erreur lors de la prise de photo: $e',
+      );
+      return null;
+    }
+  }
+}