feat: 完成UserUsageStatsModal和ChangeRoleModal组件国际化

- 添加用户使用统计模态框的完整国际化支持
  * 时间选择器选项(最近24小时/7天/30天/90天)
  * 统计卡片(请求数/输入Token/输出Token/总费用)
  * API Keys表格表头和状态显示
  * 使用趋势图表占位符和无数据状态

- 添加角色变更模态框的完整国际化支持
  * 角色选择表单和描述文本
  * 动态警告消息(授予/移除管理员权限)
  * 按钮状态和成功提示消息

- 更新三种语言文件(zh-cn/en/zh-tw)添加新的翻译键值
- 集成Vue I18n组合式API支持动态参数替换
- 保持响应式翻译和用户体验的一致性

web/admin-spa/src/components/admin/ChangeRoleModal.vue

@@ -6,7 +6,7 @@
     <div class="relative top-20 mx-auto w-96 rounded-md border bg-white p-5 shadow-lg">
       <div class="mt-3">
         <div class="mb-4 flex items-center justify-between">
-          <h3 class="text-lg font-medium text-gray-900">Change User Role</h3>
+          <h3 class="text-lg font-medium text-gray-900">{{ $t('user.changeRoleModal.title') }}</h3>
           <button class="text-gray-400 hover:text-gray-600" @click="$emit('close')">
             <svg class="h-6 w-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path
@@ -54,7 +54,7 @@
                         : 'bg-blue-100 text-blue-800'
                     ]"
                   >
-                    Current: {{ user.role }}
+                    {{ $t('user.changeRoleModal.currentRole', { role: user.role }) }}
                   </span>
                 </div>
               </div>
@@ -64,7 +64,7 @@
           <!-- Role Selection -->
           <form class="space-y-4" @submit.prevent="handleSubmit">
             <div>
-              <label class="mb-2 block text-sm font-medium text-gray-700"> New Role </label>
+              <label class="mb-2 block text-sm font-medium text-gray-700"> {{ $t('user.changeRoleModal.newRole') }} </label>
               <div class="space-y-2">
                 <label class="flex items-center">
                   <input
@@ -75,8 +75,8 @@
                     value="user"
                   />
                   <div class="ml-3">
-                    <div class="text-sm font-medium text-gray-900">User</div>
+                    <div class="text-sm font-medium text-gray-900">{{ $t('user.changeRoleModal.roles.user') }}</div>
-                    <div class="text-xs text-gray-500">Regular user with basic permissions</div>
+                    <div class="text-xs text-gray-500">{{ $t('user.changeRoleModal.roles.userDesc') }}</div>
                   </div>
                 </label>
                 <label class="flex items-center">
@@ -88,8 +88,8 @@
                     value="admin"
                   />
                   <div class="ml-3">
-                    <div class="text-sm font-medium text-gray-900">Administrator</div>
+                    <div class="text-sm font-medium text-gray-900">{{ $t('user.changeRoleModal.roles.admin') }}</div>
-                    <div class="text-xs text-gray-500">Full access to manage users and system</div>
+                    <div class="text-xs text-gray-500">{{ $t('user.changeRoleModal.roles.adminDesc') }}</div>
                   </div>
                 </label>
               </div>
@@ -111,15 +111,13 @@
                   </svg>
                 </div>
                 <div class="ml-3">
-                  <h3 class="text-sm font-medium text-yellow-800">Role Change Warning</h3>
+                  <h3 class="text-sm font-medium text-yellow-800">{{ $t('user.changeRoleModal.roleChangeWarning.title') }}</h3>
                   <div class="mt-2 text-sm text-yellow-700">
                     <p v-if="selectedRole === 'admin'">
-                      Granting admin privileges will give this user full access to the system,
+                      {{ $t('user.changeRoleModal.roleChangeWarning.grantAdmin') }}
-                      including the ability to manage other users and their API keys.
                     </p>
                     <p v-else>
-                      Removing admin privileges will restrict this user to only managing their own
+                      {{ $t('user.changeRoleModal.roleChangeWarning.removeAdmin') }}
-                      API keys and viewing their own usage statistics.
                     </p>
                   </div>
                 </div>
@@ -150,7 +148,7 @@
                 type="button"
                 @click="$emit('close')"
               >
-                Cancel
+                {{ $t('user.changeRoleModal.cancel') }}
               </button>
               <button
                 class="rounded-md border border-transparent bg-blue-600 px-4 py-2 text-sm font-medium text-white shadow-sm hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50"
@@ -178,9 +176,9 @@
                       fill="currentColor"
                     ></path>
                   </svg>
-                  Updating...
+                  {{ $t('user.changeRoleModal.updating') }}
                 </span>
-                <span v-else>Update Role</span>
+                <span v-else>{{ $t('user.changeRoleModal.updateRole') }}</span>
               </button>
             </div>
           </form>
@@ -194,6 +192,9 @@
 import { ref, watch } from 'vue'
 import { apiClient } from '@/config/api'
 import { showToast } from '@/utils/toast'
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
 
 const props = defineProps({
   show: {
@@ -226,7 +227,7 @@ const handleSubmit = async () => {
     })
 
     if (response.success) {
-      showToast(`User role updated to ${selectedRole.value}`, 'success')
+      showToast(t('user.changeRoleModal.roleUpdated', { role: selectedRole.value }), 'success')
       emit('updated')
     } else {
       error.value = response.message || 'Failed to update user role'

web/admin-spa/src/components/admin/UserUsageStatsModal.vue

@@ -8,7 +8,7 @@
         <div class="mb-6 flex items-center justify-between">
           <div>
             <h3 class="text-lg font-medium text-gray-900">
-              Usage Statistics - {{ user?.displayName || user?.username }}
+              {{ $t('user.usageStatsModal.titleWithUser', { displayName: user?.displayName || user?.username }) }}
             </h3>
             <p class="text-sm text-gray-500">@{{ user?.username }} • {{ user?.role }}</p>
           </div>
@@ -31,10 +31,10 @@
             class="block w-32 rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500 sm:text-sm"
             @change="loadUsageStats"
           >
-            <option value="day">Last 24 Hours</option>
+            <option value="day">{{ $t('user.usageStatsModal.periodSelection.day') }}</option>
-            <option value="week">Last 7 Days</option>
+            <option value="week">{{ $t('user.usageStatsModal.periodSelection.week') }}</option>
-            <option value="month">Last 30 Days</option>
+            <option value="month">{{ $t('user.usageStatsModal.periodSelection.month') }}</option>
-            <option value="quarter">Last 90 Days</option>
+            <option value="quarter">{{ $t('user.usageStatsModal.periodSelection.quarter') }}</option>
           </select>
         </div>
 
@@ -60,7 +60,7 @@
               fill="currentColor"
             ></path>
           </svg>
-          <p class="mt-2 text-sm text-gray-500">Loading usage statistics...</p>
+          <p class="mt-2 text-sm text-gray-500">{{ $t('user.usageStatsModal.loadingStats') }}</p>
         </div>
 
         <!-- Stats Content -->
@@ -87,7 +87,7 @@
                   </div>
                   <div class="ml-5 w-0 flex-1">
                     <dl>
-                      <dt class="truncate text-sm font-medium text-blue-600">Requests</dt>
+                      <dt class="truncate text-sm font-medium text-blue-600">{{ $t('user.usageStatsModal.summaryCards.requests') }}</dt>
                       <dd class="text-lg font-medium text-blue-900">
                         {{ formatNumber(usageStats?.totalRequests || 0) }}
                       </dd>
@@ -117,7 +117,7 @@
                   </div>
                   <div class="ml-5 w-0 flex-1">
                     <dl>
-                      <dt class="truncate text-sm font-medium text-green-600">Input Tokens</dt>
+                      <dt class="truncate text-sm font-medium text-green-600">{{ $t('user.usageStatsModal.summaryCards.inputTokens') }}</dt>
                       <dd class="text-lg font-medium text-green-900">
                         {{ formatNumber(usageStats?.totalInputTokens || 0) }}
                       </dd>
@@ -147,7 +147,7 @@
                   </div>
                   <div class="ml-5 w-0 flex-1">
                     <dl>
-                      <dt class="truncate text-sm font-medium text-purple-600">Output Tokens</dt>
+                      <dt class="truncate text-sm font-medium text-purple-600">{{ $t('user.usageStatsModal.summaryCards.outputTokens') }}</dt>
                       <dd class="text-lg font-medium text-purple-900">
                         {{ formatNumber(usageStats?.totalOutputTokens || 0) }}
                       </dd>
@@ -177,7 +177,7 @@
                   </div>
                   <div class="ml-5 w-0 flex-1">
                     <dl>
-                      <dt class="truncate text-sm font-medium text-yellow-600">Total Cost</dt>
+                      <dt class="truncate text-sm font-medium text-yellow-600">{{ $t('user.usageStatsModal.summaryCards.totalCost') }}</dt>
                       <dd class="text-lg font-medium text-yellow-900">
                         ${{ (usageStats?.totalCost || 0).toFixed(4) }}
                       </dd>
@@ -194,7 +194,7 @@
             class="rounded-lg border border-gray-200 bg-white"
           >
             <div class="border-b border-gray-200 px-4 py-5 sm:px-6">
-              <h4 class="text-lg font-medium leading-6 text-gray-900">API Keys Usage</h4>
+              <h4 class="text-lg font-medium leading-6 text-gray-900">{{ $t('user.usageStatsModal.apiKeysTable.title') }}</h4>
             </div>
             <div class="overflow-hidden">
               <table class="min-w-full divide-y divide-gray-200">
@@ -204,37 +204,37 @@
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      API Key
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.apiKey') }}
                     </th>
                     <th
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      Status
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.status') }}
                     </th>
                     <th
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      Requests
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.requests') }}
                     </th>
                     <th
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      Tokens
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.tokens') }}
                     </th>
                     <th
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      Cost
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.cost') }}
                     </th>
                     <th
                       class="px-6 py-3 text-left text-xs font-medium uppercase tracking-wider text-gray-500"
                       scope="col"
                     >
-                      Last Used
+                      {{ $t('user.usageStatsModal.apiKeysTable.headers.lastUsed') }}
                     </th>
                   </tr>
                 </thead>
@@ -253,21 +253,21 @@
                             : 'bg-red-100 text-red-800'
                         ]"
                       >
-                        {{ apiKey.isActive ? 'Active' : 'Disabled' }}
+                        {{ apiKey.isActive ? $t('user.usageStatsModal.apiKeysTable.status.active') : $t('user.usageStatsModal.apiKeysTable.status.disabled') }}
                       </span>
                     </td>
                     <td class="whitespace-nowrap px-6 py-4 text-sm text-gray-900">
                       {{ formatNumber(apiKey.usage?.requests || 0) }}
                     </td>
                     <td class="whitespace-nowrap px-6 py-4 text-sm text-gray-900">
-                      <div>In: {{ formatNumber(apiKey.usage?.inputTokens || 0) }}</div>
+                      <div>{{ $t('user.usageStatsModal.apiKeysTable.tokensFormat.input') }}: {{ formatNumber(apiKey.usage?.inputTokens || 0) }}</div>
-                      <div>Out: {{ formatNumber(apiKey.usage?.outputTokens || 0) }}</div>
+                      <div>{{ $t('user.usageStatsModal.apiKeysTable.tokensFormat.output') }}: {{ formatNumber(apiKey.usage?.outputTokens || 0) }}</div>
                     </td>
                     <td class="whitespace-nowrap px-6 py-4 text-sm text-gray-900">
                       ${{ (apiKey.usage?.totalCost || 0).toFixed(4) }}
                     </td>
                     <td class="whitespace-nowrap px-6 py-4 text-sm text-gray-500">
-                      {{ apiKey.lastUsedAt ? formatDate(apiKey.lastUsedAt) : 'Never' }}
+                      {{ apiKey.lastUsedAt ? formatDate(apiKey.lastUsedAt) : $t('user.usageStatsModal.apiKeysTable.never') }}
                     </td>
                   </tr>
                 </tbody>
@@ -278,7 +278,7 @@
           <!-- Chart Placeholder -->
           <div class="rounded-lg border border-gray-200 bg-white">
             <div class="border-b border-gray-200 px-4 py-5 sm:px-6">
-              <h4 class="text-lg font-medium leading-6 text-gray-900">Usage Trend</h4>
+              <h4 class="text-lg font-medium leading-6 text-gray-900">{{ $t('user.usageStatsModal.usageTrend.title') }}</h4>
             </div>
             <div class="p-6">
               <div
@@ -298,12 +298,12 @@
                       stroke-width="2"
                     />
                   </svg>
-                  <h3 class="mt-2 text-sm font-medium text-gray-900">Usage Chart</h3>
+                  <h3 class="mt-2 text-sm font-medium text-gray-900">{{ $t('user.usageStatsModal.usageTrend.chartTitle') }}</h3>
                   <p class="mt-1 text-sm text-gray-500">
-                    Daily usage trends for {{ selectedPeriod }} period
+                    {{ $t('user.usageStatsModal.usageTrend.dailyTrends', { period: selectedPeriod }) }}
                   </p>
                   <p class="mt-2 text-xs text-gray-400">
-                    (Chart integration can be added with Chart.js, D3.js, or similar library)
+                    {{ $t('user.usageStatsModal.usageTrend.chartNote') }}
                   </p>
                 </div>
               </div>
@@ -325,9 +325,9 @@
                 stroke-width="2"
               />
             </svg>
-            <h3 class="mt-2 text-sm font-medium text-gray-900">No usage data</h3>
+            <h3 class="mt-2 text-sm font-medium text-gray-900">{{ $t('user.usageStatsModal.noData.title') }}</h3>
             <p class="mt-1 text-sm text-gray-500">
-              This user hasn't made any API requests in the selected period.
+              {{ $t('user.usageStatsModal.noData.description') }}
             </p>
           </div>
         </div>
@@ -337,7 +337,7 @@
             class="rounded-md border border-gray-300 px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
             @click="$emit('close')"
           >
-            Close
+            {{ $t('user.usageStatsModal.close') }}
           </button>
         </div>
       </div>
@@ -349,6 +349,9 @@
 import { ref, watch } from 'vue'
 import { apiClient } from '@/config/api'
 import { showToast } from '@/utils/toast'
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
 
 const props = defineProps({
   show: {

web/admin-spa/src/i18n/locales/en.js

@@ -789,6 +789,102 @@ export default {
       loadUsersError: 'Failed to load users',
       toggleStatusError: 'Failed to toggleStatus',
       disableKeysError: 'Failed to disableKeys'
+    },
+
+    // User Usage Stats Modal
+    usageStatsModal: {
+      title: 'Usage Statistics',
+      titleWithUser: 'Usage Statistics - {displayName}',
+      
+      // Time period selection
+      periodSelection: {
+        day: 'Last 24 Hours',
+        week: 'Last 7 Days',
+        month: 'Last 30 Days',
+        quarter: 'Last 90 Days'
+      },
+      
+      // Loading state
+      loadingStats: 'Loading usage statistics...',
+      
+      // Summary cards
+      summaryCards: {
+        requests: 'Requests',
+        inputTokens: 'Input Tokens',
+        outputTokens: 'Output Tokens',
+        totalCost: 'Total Cost'
+      },
+      
+      // API Keys table
+      apiKeysTable: {
+        title: 'API Keys Usage',
+        headers: {
+          apiKey: 'API Key',
+          status: 'Status',
+          requests: 'Requests',
+          tokens: 'Tokens',
+          cost: 'Cost',
+          lastUsed: 'Last Used'
+        },
+        status: {
+          active: 'Active',
+          disabled: 'Disabled'
+        },
+        tokensFormat: {
+          input: 'In',
+          output: 'Out'
+        },
+        never: 'Never'
+      },
+      
+      // Usage trend chart
+      usageTrend: {
+        title: 'Usage Trend',
+        chartTitle: 'Usage Chart',
+        dailyTrends: 'Daily usage trends for {period} period',
+        chartNote: '(Chart integration can be added with Chart.js, D3.js, or similar library)'
+      },
+      
+      // No data state
+      noData: {
+        title: 'No usage data',
+        description: 'This user hasn\'t made any API requests in the selected period.'
+      },
+      
+      // Buttons
+      close: 'Close'
+    },
+
+    // Change Role Modal
+    changeRoleModal: {
+      title: 'Change User Role',
+      
+      // User info display
+      currentRole: 'Current: {role}',
+      
+      // Role selection form
+      newRole: 'New Role',
+      roles: {
+        user: 'User',
+        userDesc: 'Regular user with basic permissions',
+        admin: 'Administrator',
+        adminDesc: 'Full access to manage users and system'
+      },
+      
+      // Warning messages
+      roleChangeWarning: {
+        title: 'Role Change Warning',
+        grantAdmin: 'Granting admin privileges will give this user full access to the system, including the ability to manage other users and their API keys.',
+        removeAdmin: 'Removing admin privileges will restrict this user to only managing their own API keys and viewing their own usage statistics.'
+      },
+      
+      // Buttons
+      cancel: 'Cancel',
+      updateRole: 'Update Role',
+      updating: 'Updating...',
+      
+      // Success message
+      roleUpdated: 'User role updated to {role}'
     }
   },
 

web/admin-spa/src/i18n/locales/zh-cn.js

@@ -789,6 +789,102 @@ export default {
       loadUsersError: 'Failed to load users',
       toggleStatusError: 'Failed to toggleStatus',
       disableKeysError: 'Failed to disableKeys'
+    },
+
+    // User Usage Stats Modal
+    usageStatsModal: {
+      title: '使用统计',
+      titleWithUser: '使用统计 - {displayName}',
+      
+      // Time period selection
+      periodSelection: {
+        day: '最近24小时',
+        week: '最近7天',
+        month: '最近30天',
+        quarter: '最近90天'
+      },
+      
+      // Loading state
+      loadingStats: '正在加载使用统计...',
+      
+      // Summary cards
+      summaryCards: {
+        requests: '请求数',
+        inputTokens: '输入Token',
+        outputTokens: '输出Token',
+        totalCost: '总费用'
+      },
+      
+      // API Keys table
+      apiKeysTable: {
+        title: 'API Keys 使用情况',
+        headers: {
+          apiKey: 'API Key',
+          status: '状态',
+          requests: '请求数',
+          tokens: 'Token数',
+          cost: '费用',
+          lastUsed: '最后使用'
+        },
+        status: {
+          active: '活跃',
+          disabled: '已禁用'
+        },
+        tokensFormat: {
+          input: '输入',
+          output: '输出'
+        },
+        never: '从未使用'
+      },
+      
+      // Usage trend chart
+      usageTrend: {
+        title: '使用趋势',
+        chartTitle: '使用图表',
+        dailyTrends: '最近 {period} 的日使用趋势',
+        chartNote: '(可集成 Chart.js、D3.js 或类似图表库)'
+      },
+      
+      // No data state
+      noData: {
+        title: '暂无使用数据',
+        description: '该用户在所选时间段内尚未发起任何API请求。'
+      },
+      
+      // Buttons
+      close: '关闭'
+    },
+
+    // Change Role Modal
+    changeRoleModal: {
+      title: '修改用户角色',
+      
+      // User info display
+      currentRole: '当前角色：{role}',
+      
+      // Role selection form
+      newRole: '新角色',
+      roles: {
+        user: '用户',
+        userDesc: '具有基本权限的普通用户',
+        admin: '管理员',
+        adminDesc: '拥有管理用户和系统的完整权限'
+      },
+      
+      // Warning messages
+      roleChangeWarning: {
+        title: '角色变更警告',
+        grantAdmin: '授予管理员权限将使该用户拥有系统的完整访问权限，包括管理其他用户及其API密钥的能力。',
+        removeAdmin: '移除管理员权限将限制该用户只能管理自己的API密钥和查看自己的使用统计。'
+      },
+      
+      // Buttons
+      cancel: '取消',
+      updateRole: '更新角色',
+      updating: '更新中...',
+      
+      // Success message
+      roleUpdated: '用户角色已更新为 {role}'
     }
   },
 

web/admin-spa/src/i18n/locales/zh-tw.js

@@ -789,6 +789,102 @@ export default {
       loadUsersError: 'Failed to load users',
       toggleStatusError: 'Failed to toggleStatus',
       disableKeysError: 'Failed to disableKeys'
+    },
+
+    // User Usage Stats Modal
+    usageStatsModal: {
+      title: '使用統計',
+      titleWithUser: '使用統計 - {displayName}',
+      
+      // Time period selection
+      periodSelection: {
+        day: '最近24小時',
+        week: '最近7天',
+        month: '最近30天',
+        quarter: '最近90天'
+      },
+      
+      // Loading state
+      loadingStats: '正在載入使用統計...',
+      
+      // Summary cards
+      summaryCards: {
+        requests: '請求數',
+        inputTokens: '輸入Token',
+        outputTokens: '輸出Token',
+        totalCost: '總費用'
+      },
+      
+      // API Keys table
+      apiKeysTable: {
+        title: 'API Keys 使用情況',
+        headers: {
+          apiKey: 'API Key',
+          status: '狀態',
+          requests: '請求數',
+          tokens: 'Token數',
+          cost: '費用',
+          lastUsed: '最後使用'
+        },
+        status: {
+          active: '活躍',
+          disabled: '已停用'
+        },
+        tokensFormat: {
+          input: '輸入',
+          output: '輸出'
+        },
+        never: '從未使用'
+      },
+      
+      // Usage trend chart
+      usageTrend: {
+        title: '使用趨勢',
+        chartTitle: '使用圖表',
+        dailyTrends: '最近 {period} 的日使用趨勢',
+        chartNote: '(可整合 Chart.js、D3.js 或類似圖表庫)'
+      },
+      
+      // No data state
+      noData: {
+        title: '暫無使用資料',
+        description: '該使用者在所選時間段內尚未發起任何API請求。'
+      },
+      
+      // Buttons
+      close: '關閉'
+    },
+
+    // Change Role Modal
+    changeRoleModal: {
+      title: '修改使用者角色',
+      
+      // User info display
+      currentRole: '當前角色：{role}',
+      
+      // Role selection form
+      newRole: '新角色',
+      roles: {
+        user: '使用者',
+        userDesc: '具有基本權限的普通使用者',
+        admin: '管理員',
+        adminDesc: '擁有管理使用者和系統的完整權限'
+      },
+      
+      // Warning messages
+      roleChangeWarning: {
+        title: '角色變更警告',
+        grantAdmin: '授予管理員權限將使該使用者擁有系統的完整存取權限，包括管理其他使用者及其API密鑰的能力。',
+        removeAdmin: '移除管理員權限將限制該使用者只能管理自己的API密鑰和檢視自己的使用統計。'
+      },
+      
+      // Buttons
+      cancel: '取消',
+      updateRole: '更新角色',
+      updating: '更新中...',
+      
+      // Success message
+      roleUpdated: '使用者角色已更新為 {role}'
     }
   },