refactor(utils): add barrel exports

src/data/repositories/interfaces/iauth_repository.ts

@@ -13,7 +13,7 @@
  * 原始 Dart: lib/data/repositories/auth_repository_impl.dart
  */
 
-import type { Result } from "@/utils/result";
+import type { Result } from "@/utils";
 import type {
   GuestLoginResponse,
   LoginResponse,

src/data/repositories/interfaces/ichat_repository.ts

@@ -11,7 +11,7 @@
  * 原始 Dart: lib/data/repositories/chat_repository_impl.dart
  */
 
-import type { Result } from "@/utils/result";
+import type { Result } from "@/utils";
 import type {
   ChatHistoryResponse,
   ChatMessage,

src/data/repositories/interfaces/imetrics_repository.ts

@@ -9,7 +9,7 @@
  * 原始 Dart: lib/data/repositories/metrics_repository_impl.dart
  */
 
-import type { Result } from "@/utils/result";
+import type { Result } from "@/utils";
 
 export interface IMetricsRepository {
   /** 上报 PWA 事件。自动注入当前秒级时间戳。 */

src/data/repositories/interfaces/iuser_repository.ts

@@ -9,7 +9,7 @@
  * 原始 Dart: lib/data/repositories/user_repository_impl.dart
  */
 
-import type { Result } from "@/utils/result";
+import type { Result } from "@/utils";
 import type {
   CreditsData,
   CreditsHistoryData,