refactor: 清理多余字段并重新设计个人中心页面

frontend/src/plugins/i18n/en.json

@@ -2593,6 +2593,8 @@
     "installSuccess": "Installation successful"
   },
   "profile": {
+    "title": "Profile",
+    "description": "Manage your personal information and security settings",
     "changePassword": "Change Password",
     "changePasswordDesc": "Enter your current password and new password, minimum 6 characters",
     "currentPassword": "Current Password",
@@ -2631,7 +2633,7 @@
     "upgradePlan": "Upgrade Plan",
     "apiCalls": "API Calls",
     "storage": "Storage",
-    "accountStats": "Account Statistics",
+    "accountOverview": "Account Overview",
     "lastLogin": "Last Login",
     "accountStatus": "Account Status",
     "accountType": "Account Type",

frontend/src/plugins/i18n/zh.json

@@ -2583,6 +2583,8 @@
     "installSuccess": "安装成功"
   },
   "profile": {
+    "title": "个人中心",
+    "description": "管理您的个人信息和安全设置",
     "changePassword": "修改密码",
     "changePasswordDesc": "请输入当前密码和新密码，密码长度至少6位",
     "currentPassword": "当前密码",
@@ -2621,7 +2623,7 @@
     "upgradePlan": "升级套餐",
     "apiCalls": "API 调用",
     "storage": "存储空间",
-    "accountStats": "账户统计",
+    "accountOverview": "账户概览",
     "lastLogin": "上次登录",
     "accountStatus": "账户状态",
     "accountType": "账户类型",