fix: 修复合并后的测试兼容性

- 更新 handler_test.rs 使用 RwLock<MockRouter>
- 确保所有 43 个测试通过

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/handler_test.rs

@@ -1,5 +1,5 @@
 use std::collections::HashMap;
-use std::sync::Arc;
+use std::sync::{Arc, RwLock};
 use axum::{
     body::Body,
     extract::Request,
@@ -42,7 +42,7 @@ fn create_app_state_with_rules(rules: Vec<&str>) -> Arc<AppState> {
     }
 
     let router = MockRouter::new(index);
-    Arc::new(AppState { router })
+    Arc::new(AppState { router: RwLock::new(router) })
 }
 
 #[test]