feat(oa): add return, resubmit, and multi-round approval progress

Align with DingTalk semantics: reject ends the instance, return keeps it for initiator edits, and revoke-and-resubmit creates a linked new instance. Progress timeline projects rounds via oa_instance_event.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/api/oaApproval.ts

@@ -210,6 +210,7 @@ export function fetchStartOaInstance(data: {
   initiatorDeptId?: string
   initiatorSelectUserIds?: string[]
   relatedInstanceIds?: string[]
+  sourceInstanceId?: string
 }) {
   return request.post({
     url: `${BASE}/instances`,
@@ -260,6 +261,25 @@ export function fetchRejectOaTask(taskId: string, comment?: string) {
   })
 }
 
+export function fetchReturnOaTask(taskId: string, comment: string) {
+  return request.post({
+    url: `${BASE}/tasks/${taskId}/return`,
+    data: { comment },
+    showSuccessMessage: true
+  })
+}
+
+export function fetchResubmitOaInstance(
+  id: string,
+  data: { formData?: Record<string, any>; initiatorSelectUserIds?: string[] }
+) {
+  return request.post({
+    url: `${BASE}/instances/${id}/resubmit`,
+    data,
+    showSuccessMessage: true
+  })
+}
+
 export function fetchAddSignOaTask(
   taskId: string,
   data: { userIds: string[]; comment?: string }