修复前端降噪审计问题（frontend-simplification-audit-fixes）

client/src/pages/PortalHomePage.tsx

@@ -1077,7 +1077,7 @@ export function PortalHomePage() {
     roleCapabilities.canManageSystem
       ? {
           key: "system-audit",
-          href: "/audit",
+          href: "/audit-logs",
           label: "审计日志",
           value: "查看",
           note: "查询关键操作留痕。",