feat: 添加语言管理功能，更新系统设置页面，优化用户体验

src/locales/en-US.json

@@ -299,5 +299,22 @@
       "title": "Verify your email",
       "description": "We have sent a verification code to {email}. Please enter the code below to verify your email address."
     }
+  },
+  "settings": {
+    "title": "Settings",
+    "language": "Language",
+    "aboutUs": "About Us",
+    "clearCache": "Clear Cache",
+    "checkUpdate": "Check for Updates",
+    "cacheCleared": "Cache cleared",
+    "updateAvailable": "New version available",
+    "currentVersion": "Current version",
+    "latestVersion": "Latest version",
+    "newVersion": "New version",
+    "cancel": "Cancel",
+    "updateNow": "Update Now",
+    "alreadyLatest": "Already up to date",
+    "checkUpdateFailed": "Failed to check for updates",
+    "languageTitle": "Language / 语言"
   }
 }

src/locales/zh-CN.json

@@ -299,5 +299,22 @@
       "title": "验证您的邮箱",
       "description": "我们已向 {email} 发送了一个验证码。请在下方输入代码以验证您的邮箱地址。"
     }
+  },
+  "settings": {
+    "title": "设置",
+    "language": "语言",
+    "aboutUs": "关于我们",
+    "clearCache": "清除缓存",
+    "checkUpdate": "检查更新",
+    "cacheCleared": "缓存已清除",
+    "updateAvailable": "发现新版本",
+    "currentVersion": "当前版本",
+    "latestVersion": "最新版本",
+    "newVersion": "新版本",
+    "cancel": "取消",
+    "updateNow": "立即更新",
+    "alreadyLatest": "已是最新版本",
+    "checkUpdateFailed": "检查更新失败",
+    "languageTitle": "语言 / Language"
   }
 }