refactor: improve specialization card layout and unify chat screen header and navigation with home screen components.

lib/features/profile/data/profile_repository.dart

@@ -0,0 +1,66 @@
+import 'package:dio/dio.dart';
+import 'package:real_estate_mobile/core/network/api_client.dart';
+import 'package:real_estate_mobile/core/network/api_exceptions.dart';
+
+class ProfileRepository {
+  final Dio _dio = ApiClient.instance.dio;
+
+  /// Fetch profile based on role.
+  /// Agent: GET /agents/profile/me
+  /// User: GET /users/profile/me
+  Future<Map<String, dynamic>> getMyProfile(String role) async {
+    try {
+      final endpoint = role == 'AGENT'
+          ? '/agents/profile/me'
+          : '/users/profile/me';
+      final response = await _dio.get(endpoint);
+      return response.data['data'] as Map<String, dynamic>;
+    } on DioException catch (e) {
+      if (e.error is ApiException) throw e.error as ApiException;
+      throw ApiException(
+        message: e.message ?? 'Failed to fetch profile',
+        statusCode: e.response?.statusCode,
+      );
+    }
+  }
+
+  /// Update profile based on role.
+  /// Agent: PUT /agents/profile
+  /// User: PATCH /users/profile/me
+  Future<Map<String, dynamic>> updateProfile(
+    String role,
+    Map<String, dynamic> data,
+  ) async {
+    try {
+      final Response response;
+      if (role == 'AGENT') {
+        response = await _dio.put('/agents/profile', data: data);
+      } else {
+        response = await _dio.patch('/users/profile/me', data: data);
+      }
+      return response.data['data'] as Map<String, dynamic>;
+    } on DioException catch (e) {
+      if (e.error is ApiException) throw e.error as ApiException;
+      throw ApiException(
+        message: e.message ?? 'Failed to update profile',
+        statusCode: e.response?.statusCode,
+      );
+    }
+  }
+
+  Future<String> getAvatarUploadUrl(String role, String fileName) async {
+    try {
+      final endpoint = role == 'AGENT'
+          ? '/upload/avatar-presigned-url'
+          : '/upload/user-avatar-presigned-url';
+      final response = await _dio.post(endpoint, data: {'fileName': fileName});
+      return response.data['data']['url'] as String;
+    } on DioException catch (e) {
+      if (e.error is ApiException) throw e.error as ApiException;
+      throw ApiException(
+        message: e.message ?? 'Failed to get upload URL',
+        statusCode: e.response?.statusCode,
+      );
+    }
+  }
+}