style(frontend): 统一 API 模块代码风格

- 移除所有语句末尾分号
- 统一对象属性尾随逗号格式
- 优化类型定义导入顺序
- 提升代码一致性和可读性

frontend/src/api/index.ts

@@ -4,20 +4,20 @@
  */
 
 // Re-export the HTTP client
-export { apiClient } from './client';
+export { apiClient } from './client'
 
 // Auth API
-export { authAPI } from './auth';
+export { authAPI } from './auth'
 
 // User APIs
-export { keysAPI } from './keys';
-export { usageAPI } from './usage';
-export { userAPI } from './user';
-export { redeemAPI, type RedeemHistoryItem } from './redeem';
-export { userGroupsAPI } from './groups';
+export { keysAPI } from './keys'
+export { usageAPI } from './usage'
+export { userAPI } from './user'
+export { redeemAPI, type RedeemHistoryItem } from './redeem'
+export { userGroupsAPI } from './groups'
 
 // Admin APIs
-export { adminAPI } from './admin';
+export { adminAPI } from './admin'
 
 // Default export
-export { default } from './client';
+export { default } from './client'