feat: 抽测风速改为用户可自定义次数（增删按钮）

- models.rs：新增 spot_check_count 字段（默认 5）
- db.rs：INSERT/SELECT 添加 spotcheckcount 列
- migrations/007：ALTER TABLE weather_data ADD spotcheckcount
- afterbody.js：使用 data.spotCheckCount 动态渲染抽测数据

src/models.rs

@@ -4,6 +4,11 @@ use serde_json::Value as JsonValue;
 use sqlx::FromRow;
 use std::convert::TryFrom;
 
+// 默认值函数
+fn default_spot_check_count() -> i32 {
+    5
+}
+
 // 定义JWT载荷结构体
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct Claims {
@@ -204,6 +209,10 @@ pub struct WeatherData {
     #[sqlx(rename = "hasspotcheckwindspeed")]
     pub has_spot_check_wind_speed: bool,
 
+    #[serde(rename = "spotCheckCount", default = "default_spot_check_count")]
+    #[sqlx(rename = "spotcheckcount")]
+    pub spot_check_count: i32,
+
     #[serde(rename = "hours")]
     #[sqlx(rename = "hour")]
     pub hours: i32,