support linking OAuth 2.0 user to logged-in users

src/locales/zh_Hans.json

@@ -1257,6 +1257,7 @@
         "cannot retrieve oauth2 token": "无法获取 OAuth 2.0 令牌",
         "invalid oauth2 token": "无效的 OAuth 2.0 令牌",
         "cannot retrieve user info from oauth2 provider": "无法从 OAuth 2.0 提供者获取用户信息",
+        "oauth2 user already bound to another user": "OAuth 2.0 用户已经绑定到另一个用户",
         "query items cannot be blank": "请求项目不能为空",
         "query items too much": "请求项目过多",
         "query items have invalid item": "请求项目中有非法项目",
@@ -2154,6 +2155,7 @@
     "Unable to clear user data": "无法清除用户数据",
     "Third-Party Logins": "第三方登录",
     "Linked Time": "关联时间",
+    "Link": "关联",
     "Unlink": "取消关联",
     "Are you sure you want to unlink this login method?": "您确定要取消关联该登录方式？",
     "Unable to retrieve third-party logins list": "无法获取第三方登录列表",