frontend layout and infrastructure

frontend/src/types/api.ts

@@ -0,0 +1,30 @@
+/** 后端统一响应格式 */
+export interface ApiResponse<T = unknown> {
+  code: number
+  message: string
+  data: T
+}
+
+/** 分页数据结构 */
+export interface PaginatedData<T> {
+  items: T[]
+  total: number
+  page: number
+  per_page: number
+}
+
+/** 分页查询参数 */
+export interface PaginationParams {
+  page?: number
+  per_page?: number
+}
+
+/** 业务异常 */
+export class ApiError extends Error {
+  code: number
+  constructor(message: string, code: number) {
+    super(message)
+    this.code = code
+    this.name = 'ApiError'
+  }
+}