✨ 优化 2026 前端无障碍与响应式体验

完善 2026 主题的移动端与桌面端交互体验，修复多项可访问性和信息展示问题。

- 允许浏览器缩放，补充焦点样式、按钮名称、表单标签和对话框键盘焦点管理\n- 支持 reduced-motion，扩大公共页、后台导航、记录列表和分页控件的触控区域\n- 优化系统设置分区导航、密码显示、字段语义和底部粘性保存栏\n- 压缩移动文件列表操作区，改善桌面表格滚动可达性和统计值截断\n- 优化仪表盘指标、趋势摘要、进度条语义及中英文文案

src/i18n/locales/en-US.ts

@@ -10,6 +10,14 @@ export default {
     add: 'Add',
     back: 'Back',
     next: 'Next',
+    language: 'Select language',
+    switchToLight: 'Switch to light mode',
+    switchToDark: 'Switch to dark mode',
+    showPassword: 'Show password',
+    hidePassword: 'Hide password',
+    openMenu: 'Open navigation menu',
+    closeMenu: 'Close navigation menu',
+    dialog: 'Dialog',
     previous: 'Previous',
     loading: 'Loading...',
     noData: 'No Data',
@@ -46,6 +54,8 @@ export default {
     second: 'second',
     hour: 'hour',
     day: 'day',
+    dayShort: 'd',
+    hourShort: 'h',
     times: 'times',
     appName: 'FileCodeBox - File Transfer',
     appDescription: 'Ready-to-use file transfer system'
@@ -111,6 +121,29 @@ export default {
           title: 'Permanent',
           description: 'View long-retention share records'
         }
+      },
+      topDownloads: {
+        title: 'Top 5 Downloads',
+        description: 'Downloads and traffic in the selected date range',
+        file: 'File',
+        downloads: 'Downloads',
+        traffic: 'Traffic',
+        status: 'Status',
+        empty: 'No download records',
+        current: 'Current',
+        history: 'Historical'
+      },
+      trend: {
+        title: 'Download / Upload Trend',
+        mobileHint: 'Tap or slide to inspect; drag the bottom date axis to pan',
+        startDate: 'Start date',
+        endDate: 'End date',
+        zoomIn: 'Zoom in',
+        zoomOut: 'Zoom out',
+        reset: 'Reset',
+        noData: 'No data',
+        loadFailed: 'Failed to load analytics',
+        summary: '{window}: {downloads} downloads / {downloadTraffic}, {uploads} uploads / {uploadTraffic}'
       }
     },
     fileManage: {
@@ -313,6 +346,9 @@ export default {
       forever: 'Forever',
       count: 'By Count',
       label: 'Expiration Time',
+      method: 'Expiration method',
+      increment: 'Increase expiration value',
+      decrement: 'Decrease expiration value',
       placeholders: {
         days: 'Enter days',
         hours: 'Enter hours',
@@ -741,6 +777,11 @@ export default {
       unsavedChanges: 'Unsaved configuration changes',
       allChangesSaved: 'All configuration changes are saved',
       refreshBlocked: 'Save current changes before refreshing'
+      ,sectionNavigation: 'Settings section navigation'
+      ,reloadSaved: 'Reload saved settings'
+      ,robotsWarning: 'A Disallow: / rule blocks search engines from crawling the entire site.'
+      ,fileSizeUnit: 'File size unit'
+      ,timeUnit: 'Time unit'
     },
     systemSettings: {
       title: 'System Settings',
@@ -924,6 +965,10 @@ export default {
   // Components
   components: {
     pagination: {
+      range: 'Showing {start} to {end} of {total}',
+      pageSize: 'Items per page',
+      perPage: '{size}/page',
+      goToPage: 'Go to page {page}',
       showing: 'Showing',
       to: 'to',
       of: 'of',