将struct从main移动到models

src/models.rs

@@ -1,7 +1,43 @@
 use chrono::NaiveDate;
 use serde::{Deserialize, Serialize};
-use sqlx::FromRow; // 处理日期类型
+use sqlx::FromRow;
 
+// 新增：API请求/响应结构体
+#[derive(Debug, Deserialize)]
+pub struct OpenIdRequest {
+    pub openid: String,
+}
+
+#[derive(Debug, Serialize)]
+pub struct UserIdResponse {
+    pub user_id: i32,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct WeChatLoginRequest {
+    pub code: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct WeChatApiResponse {
+    pub openid: Option<String>,
+    pub errcode: Option<i32>,
+    pub errmsg: Option<String>,
+}
+
+#[derive(Debug, Serialize)]
+pub struct OpenIdResponse {
+    pub openid: String,
+}
+
+#[derive(Debug, Serialize)]
+pub struct ErrorResponse {
+    pub error: String,
+    pub errcode: Option<i32>,
+    pub errmsg: Option<String>,
+}
+
+// 天气数据结构体（已有）
 #[derive(Debug, Deserialize, Serialize)]
 pub struct WeatherData {
     #[serde(rename = "areaType")]