fix: 补齐配额页 refresh_files_and_quota 翻译

配额管理刷新按钮缺少 i18n key，导致界面直接显示 key 原文。

Author: NGLSL

src/i18n/locales/en.json

@@ -1173,7 +1173,8 @@
   "quota_management": {
     "title": "Quota Management",
     "description": "Monitor OAuth quota status for Antigravity, Codex, Claude, Kimi, and xAI credentials.",
-    "refresh_all_credentials": "Refresh all credentials"
+    "refresh_all_credentials": "Refresh all credentials",
+    "refresh_files_and_quota": "Refresh files and quota"
   },
   "plugin_management": {
     "title": "Plugin Management",

src/i18n/locales/ru.json

@@ -1097,7 +1097,8 @@
   "quota_management": {
     "title": "Управление квотами",
     "description": "Следите за статусом квот OAuth для учётных данных Antigravity, Codex, Claude, Kimi и xAI.",
-    "refresh_all_credentials": "Обновить все учётные данные"
+    "refresh_all_credentials": "Обновить все учётные данные",
+    "refresh_files_and_quota": "Обновить файлы и квоту"
   },
   "plugin_management": {
     "title": "Управление плагинами",

src/i18n/locales/zh-CN.json

@@ -1173,7 +1173,8 @@
   "quota_management": {
     "title": "配额管理",
     "description": "集中查看 OAuth 额度与剩余情况",
-    "refresh_all_credentials": "刷新全部凭证"
+    "refresh_all_credentials": "刷新全部凭证",
+    "refresh_files_and_quota": "刷新文件与额度"
   },
   "plugin_management": {
     "title": "插件管理",

src/i18n/locales/zh-TW.json

@@ -1088,7 +1088,8 @@
   "quota_management": {
     "title": "配額管理",
     "description": "集中查看 OAuth 配額與剩餘情況",
-    "refresh_all_credentials": "重新整理全部憑證"
+    "refresh_all_credentials": "重新整理全部憑證",
+    "refresh_files_and_quota": "重新整理檔案與配額"
   },
   "plugin_management": {
     "title": "插件管理",