fix(i18n): nest common.changeLanguage under common object

- Restructured the `common.changeLanguage` key to be nested under a `common` object in `en.json`, `fr.json`, and `zh.json`.
- This change improves the organization of the translation files and aligns with best practices for i18next.

web/src/i18n/locales/en.json

@@ -2130,5 +2130,7 @@
   "域名黑名单": "Domain Blacklist",
   "白名单": "Whitelist",
   "黑名单": "Blacklist",
-  "common.changeLanguage": "Change Language"
+  "common": {
+    "changeLanguage": "Change Language"
+  }
 }

web/src/i18n/locales/fr.json

@@ -2127,11 +2127,13 @@
   "白名单": "Liste blanche",
   "黑名单": "Liste noire",
   "切换语言": "Changer de langue",
-  "common.changeLanguage": "Changer de langue",
   "closeSidebar": "Fermer la barre latérale",
   "pricing": "Tarification",
   "language": "Langue",
   "关闭侧边栏": "Fermer la barre latérale",
   "定价": "Tarification",
-  "语言": "Langue"
+  "语言": "Langue",
+  "common": {
+    "changeLanguage": "Changer de langue"
+  }
 }

web/src/i18n/locales/zh.json

@@ -33,5 +33,7 @@
   "输入端口后回车，如：80 或 8000-8999": "输入端口后回车，如：80 或 8000-8999",
   "更新SSRF防护设置": "更新SSRF防护设置",
   "域名IP过滤详细说明": "⚠️此功能为实验性选项，域名可能解析到多个 IPv4/IPv6 地址，若开启，请确保 IP 过滤列表覆盖这些地址，否则可能导致访问失败。",
-  "common.changeLanguage": "切换语言"
+  "common": {
+    "changeLanguage": "切换语言"
+  }
 }