fix: assign users to leaf departments only, handle multi-branch dept chains

apps/server/src/integration/dingtalk.service.ts

@@ -352,18 +352,28 @@ export class DingTalkService {
     };
     collectIds(deptTree);
 
-    // 3. 从每个部门拉用户，按 dept_id_list 分配
+    // 3. 从每个部门拉用户，找到用户所属的叶子部门（支持多分支）
     const usersByDept = new Map<number, Array<{ userid: string; name: string; mobile: string; deptIds: number[] }>>();
+    const seenUsers = new Set<string>();
     for (const did of allDeptIds) {
       const deptUsers = await this.getDeptUsers(token, did);
       for (const u of deptUsers) {
-        for (const udid of u.dept_id_list) {
-          if (!usersByDept.has(udid)) usersByDept.set(udid, []);
-          usersByDept.get(udid)!.push({ userid: u.userid, name: u.name, mobile: u.mobile, deptIds: u.dept_id_list });
+        if (seenUsers.has(u.userid)) continue;
+        seenUsers.add(u.userid);
+        // 找到所有叶子部门：链 [1,2,3,1,4,5] → 叶子 [3,5]
+        const leafDepts: number[] = [];
+        for (let i = 0; i < u.dept_id_list.length; i++) {
+          const next = u.dept_id_list[i + 1];
+          if (next === undefined || next <= u.dept_id_list[i]) {
+            leafDepts.push(u.dept_id_list[i]);
+          }
+        }
+        for (const ld of leafDepts) {
+          if (!usersByDept.has(ld)) usersByDept.set(ld, []);
+          usersByDept.get(ld)!.push({ userid: u.userid, name: u.name, mobile: u.mobile, deptIds: u.dept_id_list });
         }
       }
     }
-
     // 4. 递归挂用户到树节点
     const attachUsers = (node: OrgDeptNode): OrgDeptNodeWithUsers => ({
       id: node.id,