add enable auto dark mode option

src/locales/en.js

@@ -112,6 +112,7 @@ export default {
     'User Profile': 'User Profile',
     'Language': 'Language',
     'Enable Animate': 'Enable Animate',
+    'Enable Auto Dark Mode': 'Enable Auto Dark Mode',
     'You have been successfully registered': 'You have been successfully registered',
     'Unable to sign up': 'Unable to sign up',
     'User registration is disabled': 'User registration is disabled',

src/locales/zh_Hans.js

@@ -112,6 +112,7 @@ export default {
     'User Profile': '用户信息',
     'Language': '语言',
     'Enable Animate': '启用动画',
+    'Enable Auto Dark Mode': '启用自动深色模式',
     'You have been successfully registered': '注册成功',
     'Unable to sign up': '无法注册',
     'User registration is disabled': '用户注册已禁用',