feat: add comprehensive i18n support across all pages

- Add i18n support to admin sidebar, breadcrumbs, and nav-footer
- Add i18n support to admin pages: system-settings, users, versions, risk-control, sessions, cloud-variables, cloud-constants
- Add i18n support to auth pages: login, register
- Add i18n support to install and profile pages
- Add i18n support to agent pages: dashboard, finance, users, apps, cards
- Replace all hard-coded Chinese text with i18n translation keys
- Add comprehensive translation keys to zh.json and en.json
- Fix date formatting to use locale-agnostic toLocaleDateString()
- Pass t function as parameter for i18n in non-component files

frontend/src/pages/agent/users/index.vue

@@ -1,9 +1,12 @@
 <script setup lang="ts">
 import { Loader2, Users } from 'lucide-vue-next'
 import { onMounted, ref } from 'vue'
+import { useI18n } from 'vue-i18n'
 
 import api from '@/services/api'
 
+const { t } = useI18n()
+
 interface User {
   id: number
   username: string
@@ -22,7 +25,7 @@ onMounted(async () => {
     users.value = data || []
   }
   catch (error) {
-    console.error('获取用户列表失败:', error)
+    console.error('Load users failed:', error)
   }
   finally {
     loading.value = false
@@ -32,7 +35,7 @@ onMounted(async () => {
 function formatDate(dateStr: string | null) {
   if (!dateStr)
     return '-'
-  return new Date(dateStr).toLocaleDateString('zh-CN')
+  return new Date(dateStr).toLocaleDateString()
 }
 </script>
 
@@ -40,10 +43,10 @@ function formatDate(dateStr: string | null) {
   <div class="space-y-6">
     <div>
       <h1 class="text-2xl font-bold">
-        用户管理
+        {{ t('agent.users.title') }}
       </h1>
       <p class="text-muted-foreground">
-        管理您应用下的用户
+        {{ t('agent.users.description') }}
       </p>
     </div>
 
@@ -55,7 +58,7 @@ function formatDate(dateStr: string | null) {
 
         <div v-else-if="users.length === 0" class="text-center py-12 text-muted-foreground">
           <Users class="size-16 mx-auto mb-4 opacity-30" />
-          <p>暂无用户记录</p>
+          <p>{{ t('agent.users.noUsers') }}</p>
         </div>
 
         <div v-else class="overflow-x-auto">
@@ -63,19 +66,19 @@ function formatDate(dateStr: string | null) {
             <thead class="bg-muted/50">
               <tr>
                 <th class="px-4 py-3 text-left text-sm font-medium">
-                  用户名
+                  {{ t('agent.users.username') }}
                 </th>
                 <th class="px-4 py-3 text-left text-sm font-medium">
-                  邮箱
+                  {{ t('agent.users.email') }}
                 </th>
                 <th class="px-4 py-3 text-left text-sm font-medium">
-                  状态
+                  {{ t('agent.users.status') }}
                 </th>
                 <th class="px-4 py-3 text-left text-sm font-medium">
-                  注册时间
+                  {{ t('agent.users.registerTime') }}
                 </th>
                 <th class="px-4 py-3 text-left text-sm font-medium">
-                  最后登录
+                  {{ t('agent.users.lastLogin') }}
                 </th>
               </tr>
             </thead>
@@ -92,7 +95,7 @@ function formatDate(dateStr: string | null) {
                     :class="user.status === 'active' ? 'bg-green-500/10 text-green-500' : ''"
                     variant="outline"
                   >
-                    {{ user.status === 'active' ? '正常' : user.status }}
+                    {{ user.status === 'active' ? t('agent.users.active') : user.status }}
                   </UiBadge>
                 </td>
                 <td class="px-4 py-3 text-sm text-muted-foreground">