init: 整合项目（dashboard + www + docs）

dashboard/frontend/src/utils/agent.ts

@@ -0,0 +1,7 @@
+export function isPC() {
+  const agents = ['Android', 'iPhone', 'webOS', 'BlackBerry', 'SymbianOS', 'Windows Phone', 'iPad', 'iPod'];
+
+  const isMobile = agents.some(agent => window.navigator.userAgent.includes(agent));
+
+  return !isMobile;
+}