### 测试选区接口

# 测试选区API - 选择Q区
POST http://localhost:8080/api/link/select-region
Content-Type: application/json

{
  "code": "66L8NM3L",
  "region": "Q"
}

###

# 测试选区API - 选择V区
POST http://localhost:8080/api/link/select-region
Content-Type: application/json

{
  "code": "66L8NM3L",
  "region": "V"
}

###

# 测试链接状态API
GET http://localhost:8080/api/link/status?code=66L8NM3L

###

# 测试参数验证 - 无效region
POST http://localhost:8080/api/link/select-region
Content-Type: application/json

{
  "code": "66L8NM3L",
  "region": "X"
}

###

# 测试参数验证 - 空code
POST http://localhost:8080/api/link/select-region
Content-Type: application/json

{
  "code": "",
  "region": "Q"
}