feat(admin): 选人组件数据源-userTree——管理端「选择用户」弹窗接学校组树 (组→组内用户叶子, GET /admin/user/tree), 替代管理页手输用户ID

src/main/java/com/yunhai/flowcenter/controller/api/FlowAdminController.java

@@ -138,6 +138,14 @@ public class FlowAdminController {
         return mapAdminService.importGroups(adminGuard.requireAdmin(user, null));
     }
 
+    // ==================== 选人组件数据源 ====================
+
+    /** 选人组件树：学校组树（组→组内用户叶子），管理端「选择用户」弹窗共用 */
+    @GetMapping("/user/tree")
+    public List<FlowMapAdminService.SelectUserNodeVo> userTree(BoaUser user) {
+        return mapAdminService.userTree(adminGuard.requireAdmin(user, null));
+    }
+
     // ==================== 回调注册/推送日志/死信 ====================
 
     @GetMapping("/callback/regList")