feat(frontend): 更新 TS 类型定义与 API 服务层，对接后端重构接口

types/api.ts:
- TaskSummary/TaskResponse 新增 is_rework, reject_reason, received_at, completed_at 字段
- 新增 TASK_STATUS 常量 (PENDING/WIP/COMPLETED/REJECTED/ARCHIVED)
- 新增 TaskTransferResponse, TaskRejectPayload, TaskTransferPayload 类型
- ProductScanResponse 新增 current_location_id, task_tree 字段

types/admin.ts:
- ProductResponse 新增 current_location_id 字段

services/taskApi.ts:
- 新增 getTaskTree(serialNumber) — 产品全景任务树
- 新增 receiveTask(taskId) — 确认接收
- 新增 rejectTask(taskId, reason) — 品质驳回
- 新增 transferTask(taskId, assignees, name, note?) — 完工裂变转交

frontend/src/services/taskApi.ts

@@ -2,7 +2,11 @@ import api from "./api";
 import type {
   TaskResponse,
   TaskCompleteResponse,
+  TaskTransferResponse,
   TaskListResponse,
+  ProductScanResponse,
+  TaskRejectPayload,
+  TaskTransferPayload,
 } from "../types/api";
 
 // ============================================================
@@ -51,7 +55,7 @@ export async function createSubtask(
   return data;
 }
 
-/** 完成任务 + 转交 */
+/** 完成任务 + 转交（旧版单步） */
 export async function completeTask(
   taskId: string,
   payload: TaskCompletePayload
@@ -62,3 +66,65 @@ export async function completeTask(
   );
   return data;
 }
+
+// ============================================================
+// 新版核心业务 API（重构后）
+// ============================================================
+
+/**
+ * 获取产品全景任务树 — 用于十字矩阵树状图。
+ * 对应后端 GET /api/v1/products/scan/{serialNumber}
+ */
+export async function getTaskTree(
+  serialNumber: string
+): Promise<ProductScanResponse> {
+  const { data } = await api.get<ProductScanResponse>(
+    `/products/scan/${encodeURIComponent(serialNumber)}`
+  );
+  return data;
+}
+
+/**
+ * 确认接收任务 — PENDING → WIP。
+ * 对应后端 POST /api/v1/tasks/{taskId}/receive
+ */
+export async function receiveTask(taskId: string): Promise<TaskResponse> {
+  const { data } = await api.post<TaskResponse>(`/tasks/${taskId}/receive`);
+  return data;
+}
+
+/**
+ * 品质驳回 — → REJECTED，后端自动创建返工任务。
+ * 对应后端 POST /api/v1/tasks/{taskId}/reject
+ */
+export async function rejectTask(
+  taskId: string,
+  reason: string
+): Promise<TaskResponse> {
+  const { data } = await api.post<TaskResponse>(
+    `/tasks/${taskId}/reject`,
+    { reason } satisfies TaskRejectPayload
+  );
+  return data;
+}
+
+/**
+ * 完工裂变转交 — → COMPLETED，批量创建下家任务。
+ * 对应后端 POST /api/v1/tasks/{taskId}/transfer
+ */
+export async function transferTask(
+  taskId: string,
+  nextAssignees: string[],
+  nextTaskName: string,
+  note?: string
+): Promise<TaskTransferResponse> {
+  const { data } = await api.post<TaskTransferResponse>(
+    `/tasks/${taskId}/transfer`,
+    {
+      next_assignees: nextAssignees,
+      next_task_name: nextTaskName,
+      note,
+    } satisfies TaskTransferPayload
+  );
+  return data;
+}