fix: 解决 ConfigServiceImpl 与 SiteSnapshotServiceImpl 循环依赖

- 移除 SiteSnapshotServiceImpl 对 ConfigService 的依赖，直接使用 SiteConfigMapper
- ConfigServiceImpl/SitePagesServiceImpl/RiskRuleServiceImpl 改用 ApplicationEvent 异步触发快照更新
- 新增 SnapshotUpdateEvent 和 SnapshotUpdateListener
- ParApplication 添加 @EnableAsync 支持异步事件处理
- AdminController 中 updateSnapshot 调用改为发布事件

par-api/src/main/java/com/par/api/ParApplication.java

@@ -3,9 +3,11 @@ package com.par.api;
 import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
 
 @SpringBootApplication(scanBasePackages = {"com.par"})
 @MapperScan("com.par.core.mapper")
+@EnableAsync
 public class ParApplication {
 
     public static void main(String[] args) {

par-api/src/main/java/com/par/api/controller/AdminController.java

@@ -9,6 +9,7 @@ import com.par.core.entity.Psk;
 import com.par.core.entity.SiteConfig;
 import com.par.core.enums.ConfigStatus;
 import com.par.core.enums.TrustLevel;
+import com.par.core.event.SnapshotUpdateEvent;
 import com.par.core.mapper.AccountMapper;
 import com.par.core.mapper.ConfigReviewMapper;
 import com.par.core.mapper.SiteConfigMapper;
@@ -53,6 +54,7 @@ public class AdminController {
     private final com.par.core.service.SitePagesService sitePagesService;
     private final com.par.core.service.RiskRuleService riskRuleService;
     private final com.par.core.service.SiteSnapshotService snapshotService;
+    private final org.springframework.context.ApplicationEventPublisher eventPublisher;
 
     /**
      * 获取所有用户列表
@@ -128,8 +130,8 @@ public class AdminController {
         }
 
         log.info("Config approved: id={}, reviewer={}", reviewId, reviewerId);
-        // 触发快照更新
-        try { snapshotService.updateSnapshot(config.getSiteId()); } catch (Exception e) { log.warn("快照更新失败 siteId={}: {}", config.getSiteId(), e.getMessage()); }
+        // 发布事件，异步触发快照更新
+        eventPublisher.publishEvent(new SnapshotUpdateEvent(config.getSiteId()));
         return ApiResponse.success();
     }