feat(web): 构建漂流瓶移动端 PWA

- 演示登录、内存令牌、单 Promise 刷新与路由守卫\n- 投瓶、捞瓶、首次回复、会话与实时聊天\n- 独立管理员登录与审核/举报工作台\n- Socket 认证续期、断线补齐与账号切换清理\n- PWA 离线壳、深海主题与移动端无障碍

apps/web/src/main.ts

@@ -0,0 +1,12 @@
+import { createApp } from "vue";
+import { createPinia } from "pinia";
+import App from "./App.vue";
+import { createAppRouter } from "./router";
+import { useAuthStore } from "./stores/auth";
+import "./styles/main.css";
+const app = createApp(App),
+  pinia = createPinia();
+app.use(pinia);
+const auth = useAuthStore(pinia);
+app.use(createAppRouter(auth));
+app.mount("#app");