feat: 审批 API 支持通用草稿保存与回填；附件分类扩为三档（#46）

src/api/approval/instance/index.ts

@@ -38,6 +38,20 @@ export async function saveCoordination(data: ApprovalCoordinationForm) {
   return Promise.reject(new Error(res.data.message));
 }
 
+/**
+ * 新建或保存任意单据草稿（按流程编码路由），返回实例id
+ */
+export async function saveDocument(flowCode: string, data: Record<string, any>) {
+  const res = await request.post<ApiResult<number>>(
+    THINK_API_URL + '/approval/instance/' + flowCode,
+    data
+  );
+  if (res.data.code === 0) {
+    return res.data.data as number;
+  }
+  return Promise.reject(new Error(res.data.message));
+}
+
 /**
  * 提交或重提
  */

src/api/approval/task/index.ts

@@ -19,10 +19,28 @@ export async function getTodoCount() {
 /**
  * 通过（意见可选）
  */
-export async function approveTask(id: number, opinion?: string) {
+export async function approveTask(
+  id: number,
+  opinion?: string,
+  fields?: Record<string, string>
+) {
   const res = await request.post<ApiResult<ApprovalInstance>>(
     THINK_API_URL + '/approval/task/' + id + '/approve',
-    { opinion }
+    { opinion, fields }
+  );
+  if (res.data.code === 0 && res.data.data) {
+    return res.data;
+  }
+  return Promise.reject(new Error(res.data.message));
+}
+
+/**
+ * 回填（只写字段，不推进节点）
+ */
+export async function backfillTask(id: number, fields: Record<string, string>) {
+  const res = await request.post<ApiResult<ApprovalInstance>>(
+    THINK_API_URL + '/approval/task/' + id + '/backfill',
+    { fields }
   );
   if (res.data.code === 0 && res.data.data) {
     return res.data;