feat(frontend): 控制台 next-intl 中英双语

接入无 URL 前缀的 zh-CN/en，顶栏与外观设置可切换语言；选择写入 cookie 后刷新生效。

frontend/app/(main)/waf/components/ip-group-test-dialog.tsx

@@ -1,5 +1,7 @@
 'use client';
 
+import { useTranslations } from 'next-intl';
+
 import {
   Dialog,
   DialogContent,
@@ -24,29 +26,33 @@ export function IPGroupTestDialog({
   result,
   onOpenChange,
 }: IPGroupTestDialogProps) {
+  const t = useTranslations('ipGroups.testDialog');
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent className='max-w-2xl'>
         <DialogHeader>
-          <DialogTitle>自动规则测试结果</DialogTitle>
-          <DialogDescription>
-            基于当前自动配置 JSON 对请求日志进行回看测试。
-          </DialogDescription>
+          <DialogTitle>{t('title')}</DialogTitle>
+          <DialogDescription>{t('description')}</DialogDescription>
         </DialogHeader>
 
         {loading ? (
           <p className='text-sm text-muted-foreground py-6 text-center'>
-            测试中...
+            {t('testing')}
           </p>
         ) : result ? (
           <div className='space-y-4'>
             <div className='rounded-lg border border-dashed p-4 text-sm'>
               <p>
-                回看 {result.lookback} · 规则 {result.rule_count} 条 · 命中{' '}
-                {result.matched_count} 个 IP
+                {t('summary', {
+                  lookback: result.lookback,
+                  rules: result.rule_count,
+                  matched: result.matched_count,
+                })}
               </p>
               <p className='text-xs text-muted-foreground mt-1'>
-                测试时间：{new Date(result.tested_at).toLocaleString()}
+                {t('testedAt', {
+                  time: new Date(result.tested_at).toLocaleString(),
+                })}
               </p>
             </div>
             {result.matched_count > 0 ? (
@@ -54,20 +60,18 @@ export function IPGroupTestDialog({
                 {result.matched_ips.join('\n')}
               </pre>
             ) : (
-              <p className='text-sm text-muted-foreground'>
-                当前没有匹配到任何 IP。
-              </p>
+              <p className='text-sm text-muted-foreground'>{t('noMatch')}</p>
             )}
           </div>
         ) : (
           <p className='text-sm text-muted-foreground py-6 text-center'>
-            暂无测试结果。
+            {t('empty')}
           </p>
         )}
 
         <DialogFooter>
           <Button type='button' onClick={() => onOpenChange(false)}>
-            关闭
+            {t('close')}
           </Button>
         </DialogFooter>
       </DialogContent>