fix(web): remove ephemeral sandbox count from Box status display

The active_sessions count reflects transient sandbox containers that
expire after 5 minutes of inactivity, making it misleading in the UI.
Keep only connection status, backend, profile, and error count.

web/src/app/home/plugins/page.tsx

@@ -20,7 +20,6 @@ import {
   Box,
   CircleCheck,
   CircleX,
-  Activity,
 } from 'lucide-react';
 import {
   DropdownMenu,
@@ -703,28 +702,15 @@ function PluginListView() {
                       </span>
                       <span className="font-mono">{boxStatus.profile}</span>
                     </div>
-                    {boxStatus.available && (
-                      <>
-                        <div className="flex items-center gap-2">
-                          <span className="text-muted-foreground min-w-[80px]">
-                            {t('plugins.boxSessions')}:
-                          </span>
-                          <span className="flex items-center gap-1 font-mono">
-                            <Activity className="w-3 h-3" />
-                            {boxStatus.active_sessions ?? 0}
-                          </span>
-                        </div>
-                        {(boxStatus.recent_error_count ?? 0) > 0 && (
-                          <div className="flex items-center gap-2">
-                            <span className="text-muted-foreground min-w-[80px]">
-                              {t('plugins.boxErrors')}:
-                            </span>
-                            <span className="text-amber-600 font-mono">
-                              {boxStatus.recent_error_count}
-                            </span>
-                          </div>
-                        )}
-                      </>
+                    {(boxStatus.recent_error_count ?? 0) > 0 && (
+                      <div className="flex items-center gap-2">
+                        <span className="text-muted-foreground min-w-[80px]">
+                          {t('plugins.boxErrors')}:
+                        </span>
+                        <span className="text-amber-600 font-mono">
+                          {boxStatus.recent_error_count}
+                        </span>
+                      </div>
                     )}
                   </div>
                 ) : (

web/src/i18n/locales/en-US.ts

@@ -473,7 +473,6 @@ const enUS = {
     boxUnavailable: 'Unavailable',
     boxBackend: 'Backend',
     boxProfile: 'Profile',
-    boxSessions: 'Sessions',
     boxErrors: 'Errors',
     boxStatusLoadFailed: 'Failed to load Box status',
     failedToGetDebugInfo: 'Failed to get debug information',

web/src/i18n/locales/es-ES.ts

@@ -485,7 +485,6 @@ const esES = {
     boxUnavailable: 'No disponible',
     boxBackend: 'Backend',
     boxProfile: 'Perfil',
-    boxSessions: 'Sesiones',
     boxErrors: 'Errores',
     boxStatusLoadFailed: 'Error al cargar el estado de Box',
     failedToGetDebugInfo: 'Error al obtener la información de depuración',

web/src/i18n/locales/ja-JP.ts

@@ -478,7 +478,6 @@ const jaJP = {
     boxUnavailable: '利用不可',
     boxBackend: 'バックエンド',
     boxProfile: 'プロファイル',
-    boxSessions: 'セッション',
     boxErrors: 'エラー',
     boxStatusLoadFailed: 'Box ステータスの読み込みに失敗しました',
     failedToGetDebugInfo: 'デバッグ情報の取得に失敗しました',

web/src/i18n/locales/ru-RU.ts

@@ -481,7 +481,6 @@ const ruRU = {
     boxUnavailable: 'Недоступно',
     boxBackend: 'Бэкенд',
     boxProfile: 'Профиль',
-    boxSessions: 'Сессии',
     boxErrors: 'Ошибки',
     boxStatusLoadFailed: 'Не удалось загрузить статус Box',
     failedToGetDebugInfo: 'Не удалось получить отладочную информацию',

web/src/i18n/locales/th-TH.ts

@@ -468,7 +468,6 @@ const thTH = {
     boxUnavailable: 'ไม่พร้อมใช้งาน',
     boxBackend: 'แบ็กเอนด์',
     boxProfile: 'โปรไฟล์',
-    boxSessions: 'เซสชัน',
     boxErrors: 'ข้อผิดพลาด',
     boxStatusLoadFailed: 'โหลดสถานะ Box ล้มเหลว',
     failedToGetDebugInfo: 'ไม่สามารถดึงข้อมูลดีบักได้',

web/src/i18n/locales/vi-VN.ts

@@ -478,7 +478,6 @@ const viVN = {
     boxUnavailable: 'Không khả dụng',
     boxBackend: 'Backend',
     boxProfile: 'Hồ sơ',
-    boxSessions: 'Phiên',
     boxErrors: 'Lỗi',
     boxStatusLoadFailed: 'Tải trạng thái Box thất bại',
     failedToGetDebugInfo: 'Lấy thông tin gỡ lỗi thất bại',

web/src/i18n/locales/zh-Hans.ts

@@ -452,7 +452,6 @@ const zhHans = {
     boxUnavailable: '不可用',
     boxBackend: '后端',
     boxProfile: '配置',
-    boxSessions: '会话数',
     boxErrors: '错误数',
     boxStatusLoadFailed: '加载 Box 状态失败',
     failedToGetDebugInfo: '获取调试信息失败',

web/src/i18n/locales/zh-Hant.ts

@@ -453,7 +453,6 @@ const zhHant = {
     boxUnavailable: '不可用',
     boxBackend: '後端',
     boxProfile: '設定檔',
-    boxSessions: '工作階段',
     boxErrors: '錯誤數',
     boxStatusLoadFailed: '載入 Box 狀態失敗',
     failedToGetDebugInfo: '取得偵錯資訊失敗',