feat: 建立前端 TS 类型系统与 API 请求服务层

frontend/src/types/admin.ts

@@ -0,0 +1,12 @@
+/** 管理端 API 响应类型 */
+
+export interface ProductResponse {
+  id: string;
+  serial_number: string;
+  order_id: string;
+  order_no?: string;
+  material_id: string | null;
+  parent_product_id: string | null;
+  status: string;
+  created_at: string;
+}

frontend/src/types/api.ts

@@ -0,0 +1,47 @@
+/** 后端 API 响应类型 */
+
+// ============================================================
+// 任务
+// ============================================================
+
+export interface TaskSummary {
+  id: string;
+  product_id: string;
+  parent_task_id: string | null;
+  task_name: string;
+  assignee_id: string | null;
+  status: string;
+  notify_parent_on_complete: boolean;
+  created_at: string;
+}
+
+export interface TaskResponse extends TaskSummary {
+  child_tasks: TaskResponse[];
+}
+
+export interface TaskCompleteResponse {
+  completed_task: TaskResponse;
+  next_task: TaskResponse | null;
+  message: string;
+}
+
+export interface TaskListResponse {
+  tasks: TaskResponse[];
+  total: number;
+}
+
+// ============================================================
+// 产品
+// ============================================================
+
+export interface ProductScanResponse {
+  id: string;
+  serial_number: string;
+  order_id: string;
+  order_no: string;
+  material_id: string | null;
+  parent_product_id: string | null;
+  status: string;
+  created_at: string;
+  top_level_tasks: TaskSummary[];
+}