feat: theme mode support follows system

src/locales/zh.json

@@ -48,14 +48,17 @@
   "System Proxy": "系统代理",
   "Proxy Guard": "系统代理守卫",
   "Proxy Bypass": "Proxy Bypass",
-  "Theme Mode": "暗夜模式",
+  "Theme Mode": "主题模式",
   "Theme Blur": "背景模糊",
   "Theme Setting": "主题设置",
   "Traffic Graph": "流量图显",
   "Language": "语言设置",
   "Open App Dir": "应用目录",
   "Open Logs Dir": "日志目录",
-  "Version": "版本",
+  "Verge Version": "应用版本",
+  "theme.light": "浅色",
+  "theme.dark": "深色",
+  "theme.system": "系统",
 
   "Save": "保存",
   "Cancel": "取消"