feat: 集成 Sentry 错误监控 + 前端错误上报中继

后端:
  - Cargo.toml 添加 sentry/sentry-actix/sentry-tracing (v0.48)
  - main.rs 条件初始化 Sentry（SENTRY_DSN 环境变量控制）
  - 新增 handlers/sentry.rs — POST /api/sentry/events 前端中继端点
  - sentry-actix 全局中间件 + sentry-tracing 自动捕获 tracing::error!
  - .env.example 添加 SENTRY_DSN / SENTRY_TRACES_SAMPLE_RATE 配置

前端:
  - 新增 utils/sentryReporter.ts (批量上报/防抖/开发环境跳过)
  - app.ts 全局错误处理接入 Sentry (wx.onError/onUnhandledRejection/onPageNotFound)

Sentry 未配置 DSN 时完全无操作，无性能开销

src/handlers/mod.rs

@@ -5,6 +5,7 @@ pub mod favorites;
 pub mod health;
 pub mod meta;
 pub mod payment;
+pub mod sentry;
 pub mod static_files;
 pub mod user;
 pub mod weather;
@@ -47,3 +48,4 @@ pub use payment::payment_index;
 pub use payment::payment_login_status;
 pub use payment::payment_page;
 pub use payment::payment_success;
+pub use sentry::report_frontend_error;

src/handlers/sentry.rs

@@ -0,0 +1,45 @@
+use actix_web::{web, HttpResponse, post};
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub struct SentryEventRequest {
+    pub level: Option<String>,
+    pub message: String,
+    pub stack: Option<String>,
+    pub page: Option<String>,
+    pub user_id: Option<i32>,
+    pub extra: Option<serde_json::Value>,
+}
+
+#[post("/api/sentry/events")]
+pub async fn report_frontend_error(body: web::Json<SentryEventRequest>) -> HttpResponse {
+    let body = body.into_inner();
+    tracing::info!("前端错误上报: {}", body.message);
+
+    sentry::with_scope(
+        |scope| {
+            scope.set_tag("source", "wechat-miniprogram");
+            if let Some(page) = &body.page {
+                scope.set_tag("page", page);
+            }
+            if let Some(user_id) = body.user_id {
+                scope.set_user(Some(sentry::User {
+                    id: Some(user_id.to_string()),
+                    ..Default::default()
+                }));
+            }
+            if let Some(extra) = &body.extra {
+                if let Some(obj) = extra.as_object() {
+                    for (k, v) in obj {
+                        scope.set_extra(k, sentry::protocol::Value::from(v.clone()));
+                    }
+                }
+            }
+        },
+        || {
+            sentry::capture_message(&body.message, sentry::Level::Error);
+        },
+    );
+
+    HttpResponse::Ok().json(serde_json::json!({"success": true}))
+}