feat: 后端用户认证和权限过滤

- 新增 auth 模块：jumpToken 代理交换、用户信息获取、JWT 签发
- 三级权限：full(所有权限/数智中心/BI-Leader)、department(BI-Leader-Dep)、personal
- 添加 managerId 到车辆数据模型，支持个人级别按 userId 精确过滤
- auth 中间件保护所有 /api/* 端点（跳过 /api/health 和 /api/auth/*）
- 所有路由集成 filterByPermission 权限过滤

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/server/routes/mileage/targets.ts

@@ -3,6 +3,7 @@ import pool from '../../db.js';
 import mileagePool from '../../mileage-db.js';
 import { getCache } from './cache.js';
 import { fetchVehicleInfoByPlates } from './vehicle-info.js';
+import { filterByPermission } from '../../auth/permissions.js';
 
 const app = new Hono();
 
@@ -170,7 +171,9 @@ app.get('/:id/vehicles', async (c) => {
       };
     });
 
-    return c.json(result);
+    const user = (c as any).get('user') as import('../../auth/types.js').AuthUser | undefined;
+    const filtered = user ? filterByPermission(result, user) : result;
+    return c.json(filtered);
   } catch (e: unknown) {
     console.error('target vehicles error:', e);
     return c.json([], 500);