### GET /
GET http://localhost:8080/
Accept: application/json

### GET /panic（触发 panic，由 nice.Recovery 捕获并返回 JSON）
GET http://localhost:8080/panic
Accept: application/json

### 注册（POST /api/auth/register）
POST http://localhost:8080/api/auth/register
Content-Type: application/json

{
  "username": "alice",
  "password": "123456"
}

### 登录（POST /api/auth/login -> 返回 token）
POST http://localhost:8080/api/auth/login
Content-Type: application/json

{
  "username": "alice",
  "password": "123456"
}

### 获取当前用户（GET /api/me，需要 Authorization: Bearer <token>）
GET http://localhost:8080/api/me
Accept: application/json

Authorization: Bearer YOUR_TOKEN_HERE