fix: reports.py missing import json

backend/app/api/reports.py

@@ -9,6 +9,7 @@ CMA管理报表中心 — 管理会计OS
   4. 四维度绩效评分卡 — BSC健康度雷达图
 """
 from fastapi import APIRouter, Depends, Query, HTTPException
+import json
 from pydantic import BaseModel
 from sqlalchemy.orm import Session
 from sqlalchemy import func

frontend/src/api/index.ts

@@ -133,6 +133,11 @@ export const userApi = {
   delete: (id: number) => api.delete(`/users/${id}`),
 }
 
+export const orgApi = {
+  nodes: () => api.get('/org/nodes'),
+  tree: () => api.get('/org/tree'),
+}
+
 export const notificationApi = {
   list: () => api.get('/notifications/channels'),
   create: (data: any) => api.post('/notifications/channels', data),