fix: add i18n keys for Traffic tab, prevent sort mutation

- Add traffic tab/section locale keys to ru, en, zh, fa
- Use spread copy before .sort() to avoid mutating React Query cache

src/locales/en.json

@@ -1493,9 +1493,19 @@
       "tabs": {
         "overview": "Overview",
         "nodes": "Nodes",
+        "traffic": "Traffic",
         "squads": "Squads",
         "sync": "Sync"
       },
+      "traffic": {
+        "noData": "No traffic data available",
+        "totalDownload": "Download",
+        "totalUpload": "Upload",
+        "totalTraffic": "Total",
+        "online": "online",
+        "inbounds": "Inbounds",
+        "outbounds": "Outbounds"
+      },
       "overview": {
         "system": "System",
         "usersOnline": "Online",

src/locales/fa.json

@@ -2755,9 +2755,19 @@
       "tabs": {
         "overview": "نمای کلی",
         "nodes": "گره‌ها",
+        "traffic": "ترافیک",
         "squads": "گروه‌ها",
         "sync": "همگام‌سازی"
       },
+      "traffic": {
+        "noData": "داده ترافیکی موجود نیست",
+        "totalDownload": "دانلود",
+        "totalUpload": "آپلود",
+        "totalTraffic": "مجموع",
+        "online": "آنلاین",
+        "inbounds": "ورودی‌ها",
+        "outbounds": "خروجی‌ها"
+      },
       "nodes": {
         "confirmRestartAll": "آیا مطمئنید می‌خواهید همه گره‌ها را راه‌اندازی مجدد کنید؟",
         "disable": "غیرفعال",

src/locales/ru.json

@@ -1514,9 +1514,19 @@
       "tabs": {
         "overview": "Обзор",
         "nodes": "Ноды",
+        "traffic": "Трафик",
         "squads": "Сквады",
         "sync": "Синхронизация"
       },
+      "traffic": {
+        "noData": "Нет данных о трафике",
+        "totalDownload": "Загрузка",
+        "totalUpload": "Отдача",
+        "totalTraffic": "Всего",
+        "online": "онлайн",
+        "inbounds": "Inbounds",
+        "outbounds": "Outbounds"
+      },
       "overview": {
         "system": "Система",
         "usersOnline": "Онлайн",

src/locales/zh.json

@@ -2763,9 +2763,19 @@
       "tabs": {
         "overview": "概览",
         "nodes": "节点",
+        "traffic": "流量",
         "squads": "小队",
         "sync": "同步"
       },
+      "traffic": {
+        "noData": "暂无流量数据",
+        "totalDownload": "下载",
+        "totalUpload": "上传",
+        "totalTraffic": "总计",
+        "online": "在线",
+        "inbounds": "入站",
+        "outbounds": "出站"
+      },
       "nodes": {
         "confirmRestartAll": "确定要重启所有节点吗？",
         "disable": "禁用",

src/pages/AdminRemnawave.tsx

@@ -928,7 +928,7 @@ function TrafficTab({ data, isLoading, onRefresh }: TrafficTabProps) {
               <p className="mb-2 text-xs font-medium text-dark-400">
                 {t('admin.remnawave.traffic.inbounds', 'Inbounds')}
               </p>
-              {node.inbounds
+              {[...node.inbounds]
                 .sort((a, b) => b.totalBytes - a.totalBytes)
                 .map((ib) => (
                   <div
@@ -953,7 +953,7 @@ function TrafficTab({ data, isLoading, onRefresh }: TrafficTabProps) {
               <p className="mb-2 text-xs font-medium text-dark-400">
                 {t('admin.remnawave.traffic.outbounds', 'Outbounds')}
               </p>
-              {node.outbounds
+              {[...node.outbounds]
                 .sort((a, b) => b.totalBytes - a.totalBytes)
                 .map((ob) => (
                   <div