fix(rules): refresh once per visibility trigger

The mount effect fired refreshRules and refreshRuleProviders
unconditionally and again under the page-visible flag, double-firing
both queries on mount and on every hide-to-show transition. Gate the
refresh on visibility once so each trigger performs exactly one
revalidation.

src/pages/rules.tsx

@@ -24,11 +24,8 @@ const RulesPage = () => {
   const [showScrollTop, setShowScrollTop] = useState(false)
   const pageVisible = useVisibility()
 
-  // 在组件挂载时和页面获得焦点时刷新规则数据
+  // 页面可见时刷新规则数据：挂载时可见或从隐藏恢复可见各触发一次
   useEffect(() => {
-    refreshRules()
-    refreshRuleProviders()
-
     if (pageVisible) {
       refreshRules()
       refreshRuleProviders()