feat(frontend): add next-intl bilingual i18n for core paths

Wire next-intl without locale routes, add zh-CN/en catalogs, language
switcher, and migrate layout/auth/settings UI copy. Document i18n rules
in AGENTS.md and keep static export builds working.

frontend/components/common/settings/access-token.tsx

@@ -49,10 +49,17 @@ import type { CreateTokenResponse } from '@/lib/services/user';
 import { UserService } from '@/lib/services/user';
 import { useAuth } from '@/components/providers/auth-provider';
 import { toast } from 'sonner';
+import { useLocale, useTranslations } from 'next-intl';
+import { formatDateTime } from '@/i18n/format';
+import type { AppLocale } from '@/i18n/config';
 
 export function AccessTokenMain() {
   const { user } = useAuth();
   const queryClient = useQueryClient();
+  const t = useTranslations('settings');
+  const tCommon = useTranslations('common');
+  const ta = useTranslations('settings.accessToken');
+  const locale = useLocale() as AppLocale;
   const [createDialogOpen, setCreateDialogOpen] = React.useState(false);
   const [viewDialogOpen, setViewDialogOpen] = React.useState(false);
   const [tokenName, setTokenName] = React.useState('');
@@ -80,10 +87,10 @@ export function AccessTokenMain() {
       void queryClient.invalidateQueries({
         queryKey: ['user', 'access-tokens'],
       });
-      toast.success('访问令牌创建成功');
+      toast.success(ta('createSuccess'));
     },
     onError: (error: Error) => {
-      toast.error(error.message || '创建访问令牌失败');
+      toast.error(error.message || ta('createFailed'));
     },
   });
 
@@ -94,10 +101,10 @@ export function AccessTokenMain() {
       void queryClient.invalidateQueries({
         queryKey: ['user', 'access-tokens'],
       });
-      toast.success('访问令牌已撤销');
+      toast.success(ta('deleteSuccess'));
     },
     onError: (error: Error) => {
-      toast.error(error.message || '删除访问令牌失败');
+      toast.error(error.message || ta('deleteFailed'));
     },
   });
 
@@ -110,17 +117,17 @@ export function AccessTokenMain() {
       void queryClient.invalidateQueries({
         queryKey: ['user', 'access-tokens'],
       });
-      toast.success('访问令牌轮换成功，旧密钥已失效');
+      toast.success(ta('rotateSuccess'));
     },
     onError: (error: Error) => {
-      toast.error(error.message || '轮换访问令牌失败');
+      toast.error(error.message || ta('rotateFailed'));
     },
   });
 
   const handleCreateToken = (e: React.FormEvent) => {
     e.preventDefault();
     if (!tokenName.trim()) {
-      toast.error('请输入令牌名称');
+      toast.error(ta('nameRequired'));
       return;
     }
     createTokenMutation.mutate({
@@ -130,21 +137,13 @@ export function AccessTokenMain() {
   };
 
   const handleDeleteToken = (id: number, name: string) => {
-    if (
-      window.confirm(
-        `确定要删除并撤销令牌「${name}」吗？删除后此令牌将立即失效且不可恢复。`,
-      )
-    ) {
+    if (window.confirm(ta('deleteConfirm', { name }))) {
       deleteTokenMutation.mutate(id);
     }
   };
 
   const handleRotateToken = (id: number, name: string) => {
-    if (
-      window.confirm(
-        `确定要轮换令牌「${name}」的密钥吗？轮换后系统将生成全新密钥，原令牌密钥将立即失效。`,
-      )
-    ) {
+    if (window.confirm(ta('rotateConfirm', { name }))) {
       rotateTokenMutation.mutate(id);
     }
   };
@@ -153,22 +152,16 @@ export function AccessTokenMain() {
     try {
       await navigator.clipboard.writeText(text);
       setCopiedId(id);
-      toast.success('复制成功');
+      toast.success(ta('copySuccess'));
       setTimeout(() => setCopiedId(null), 2000);
     } catch {
-      toast.error('复制失败');
+      toast.error(ta('copyFailed'));
     }
   };
 
   const formatDate = (dateStr?: string) => {
-    if (!dateStr) return '未使用';
-    return new Date(dateStr).toLocaleString('zh-CN', {
-      year: 'numeric',
-      month: '2-digit',
-      day: '2-digit',
-      hour: '2-digit',
-      minute: '2-digit',
-    });
+    if (!dateStr) return '—';
+    return formatDateTime(dateStr, locale);
   };
 
   return (
@@ -184,14 +177,14 @@ export function AccessTokenMain() {
             <BreadcrumbItem>
               <BreadcrumbLink asChild>
                 <Link href='/settings' className='text-base text-primary'>
-                  设置
+                  {t('title')}
                 </Link>
               </BreadcrumbLink>
             </BreadcrumbItem>
             <BreadcrumbSeparator />
             <BreadcrumbItem>
               <BreadcrumbPage className='text-base font-semibold'>
-                访问令牌
+                {ta('breadcrumb')}
               </BreadcrumbPage>
             </BreadcrumbItem>
           </BreadcrumbList>
@@ -202,11 +195,9 @@ export function AccessTokenMain() {
         <div className='flex items-center gap-4'>
           <div>
             <h1 className='text-xl font-bold tracking-tight bg-gradient-to-r from-foreground via-foreground/90 to-muted-foreground bg-clip-text text-transparent'>
-              个人访问令牌 (AccessToken)
+              {ta('title')}
             </h1>
-            <p className='text-sm text-muted-foreground'>
-              管理您的 API 访问密钥，用于开发或第三方工具直接调用系统 API
-            </p>
+            <p className='text-sm text-muted-foreground'>{ta('subtitle')}</p>
           </div>
         </div>
         <Button
@@ -215,7 +206,7 @@ export function AccessTokenMain() {
           variant={'secondary'}
         >
           <Plus className='mr-1.5 size-4' />
-          生成新令牌
+          {ta('generate')}
         </Button>
       </div>
 
@@ -223,20 +214,18 @@ export function AccessTokenMain() {
       <div className='rounded-xl border border-amber-500/20 bg-amber-500/5 p-4 flex gap-3 text-amber-600 text-xs leading-relaxed'>
         <AlertTriangle className='size-4 shrink-0 mt-0.5' />
         <div className='space-y-1'>
-          <span className='font-bold'>安全提示：</span>
-          <p className='text-muted-foreground'>
-            访问令牌具有您账户的完整接口调用权限。为了您的账户与资产安全，请切勿通过任何代码库提交、即时通讯工具或公共媒介泄露此令牌。推荐按需创建，不使用时及时撤销。
-          </p>
+          <span className='font-bold'>{ta('securityTitle')}</span>
+          <p className='text-muted-foreground'>{ta('securityBody')}</p>
         </div>
       </div>
 
       <Card className='border border-dashed shadow-sm'>
         <CardHeader className='border-b border-dashed pb-4'>
           <CardTitle className='text-base font-semibold'>
-            活动令牌列表
+            {ta('listTitle')}
           </CardTitle>
           <CardDescription className='text-xs'>
-            当前可用的所有访问令牌
+            {ta('listDesc')}
           </CardDescription>
         </CardHeader>
         <CardContent className='pt-6 space-y-4'>
@@ -262,14 +251,14 @@ export function AccessTokenMain() {
                           className='text-[10px] px-1.5 py-0 h-4 border-rose-500/40 text-rose-500 bg-rose-500/5 font-semibold'
                         >
                           <Shield className='size-2.5 mr-0.5' />
-                          管理员
+                          {ta('adminBadge')}
                         </Badge>
                       ) : (
                         <Badge
                           variant='outline'
                           className='text-[10px] px-1.5 py-0 h-4 border-border/50 text-muted-foreground bg-muted/10 font-semibold'
                         >
-                          用户令牌
+                          {ta('userToken')}
                         </Badge>
                       )}
                     </div>
@@ -278,7 +267,11 @@ export function AccessTokenMain() {
                         {token.masked_token}
                       </div>
                       <div className='flex flex-wrap gap-x-4 gap-y-0.5 pt-1'>
-                        <span>创建于: {formatDate(token.created_at)}</span>
+                        <span>
+                          {ta('createdAt', {
+                            date: formatDate(token.created_at),
+                          })}
+                        </span>
                       </div>
                     </div>
                   </div>
@@ -297,7 +290,7 @@ export function AccessTokenMain() {
                       ) : (
                         <Copy className='size-3.5 mr-1' />
                       )}
-                      复制
+                      {ta('copy')}
                     </Button>
                     <Button
                       type='button'
@@ -310,7 +303,7 @@ export function AccessTokenMain() {
                       <RefreshCw
                         className={`size-3.5 mr-1 ${rotateTokenMutation.isPending && rotateTokenMutation.variables === token.id ? 'animate-spin' : ''}`}
                       />
-                      轮换
+                      {ta('rotate')}
                     </Button>
                     <Button
                       type='button'
@@ -321,7 +314,7 @@ export function AccessTokenMain() {
                       disabled={deleteTokenMutation.isPending}
                     >
                       <Trash2 className='size-3.5 mr-1' />
-                      撤销
+                      {ta('revoke')}
                     </Button>
                   </div>
                 </div>
@@ -330,7 +323,7 @@ export function AccessTokenMain() {
           ) : (
             <div className='rounded-xl border border-dashed border-border/50 px-4 py-10 text-center text-xs text-muted-foreground bg-muted/5 flex flex-col items-center justify-center gap-3'>
               <Key className='size-8 text-muted-foreground/30' />
-              <span>您当前暂无生成任何访问令牌</span>
+              <span>{ta('empty')}</span>
               <Button
                 type='button'
                 variant='outline'
@@ -339,7 +332,7 @@ export function AccessTokenMain() {
                 onClick={() => setCreateDialogOpen(true)}
               >
                 <Plus className='mr-1 size-3.5' />
-                生成第一个令牌
+                {ta('generateFirst')}
               </Button>
             </div>
           )}
@@ -352,20 +345,20 @@ export function AccessTokenMain() {
           <form onSubmit={handleCreateToken}>
             <DialogHeader>
               <DialogTitle className='text-base font-semibold'>
-                生成新令牌
+                {ta('generate')}
               </DialogTitle>
               <DialogDescription className='text-xs text-muted-foreground'>
-                请为新的访问令牌设置一个易于识别的名称，以便将来管理。
+                {ta('createDesc')}
               </DialogDescription>
             </DialogHeader>
             <div className='space-y-4 py-4'>
               <div className='space-y-2'>
                 <Label htmlFor='token-name' className='text-xs font-semibold'>
-                  令牌名称
+                  {ta('name')}
                 </Label>
                 <Input
                   id='token-name'
-                  placeholder='例如：my-development-key'
+                  placeholder={ta('namePlaceholder')}
                   value={tokenName}
                   onChange={(e) => setTokenName(e.target.value)}
                   disabled={createTokenMutation.isPending}
@@ -380,10 +373,10 @@ export function AccessTokenMain() {
                       className='text-xs font-semibold flex items-center gap-1.5'
                     >
                       <Shield className='size-3.5 text-rose-500' />
-                      管理员权限
+                      {ta('adminPermission')}
                     </Label>
                     <p className='text-[11px] text-muted-foreground leading-normal'>
-                      开启后此令牌可访问 /admin/** 管理端点，默认关闭
+                      {ta('adminHint')}
                     </p>
                   </div>
                   <Switch
@@ -403,7 +396,7 @@ export function AccessTokenMain() {
                 disabled={createTokenMutation.isPending}
                 className='rounded-xl text-xs h-9 border-dashed'
               >
-                取消
+                {tCommon('cancel')}
               </Button>
               <Button
                 type='submit'
@@ -413,10 +406,10 @@ export function AccessTokenMain() {
                 {createTokenMutation.isPending ? (
                   <>
                     <Loader2 className='mr-1.5 size-3.5 animate-spin' />
-                    正在生成...
+                    {ta('generating')}
                   </>
                 ) : (
-                  '生成令牌'
+                  ta('generateAction')
                 )}
               </Button>
             </DialogFooter>
@@ -438,7 +431,7 @@ export function AccessTokenMain() {
           <DialogHeader>
             <DialogTitle className='text-base font-bold text-foreground flex items-center gap-1.5'>
               <Check className='size-5 text-emerald-500 border border-emerald-500 rounded-full p-0.5' />
-              令牌密钥已就绪
+              {ta('readyTitle')}
             </DialogTitle>
           </DialogHeader>
 
@@ -468,10 +461,8 @@ export function AccessTokenMain() {
               <div className='rounded-xl border border-rose-500/20 bg-rose-500/5 p-4 flex gap-3 text-rose-600 text-xs leading-relaxed'>
                 <Info className='size-4 shrink-0 mt-0.5' />
                 <div className='space-y-1'>
-                  <span className='font-bold'>重要提示：</span>
-                  <p className='text-muted-foreground'>
-                    这是您唯一一次能够查看此访问令牌明文密钥的机会。请立即将其复制并安全地保存。
-                  </p>
+                  <span className='font-bold'>{ta('importantTitle')}</span>
+                  <p className='text-muted-foreground'>{ta('readyBody')}</p>
                 </div>
               </div>
             </div>
@@ -486,7 +477,7 @@ export function AccessTokenMain() {
               }}
               className='rounded-xl  w-full'
             >
-              我已经复制并妥善保存
+              {ta('savedConfirm')}
             </Button>
           </DialogFooter>
         </DialogContent>