refactor: 使用 sonner、zustand persist、partysocket 替换手写实现

web/src/App.tsx

@@ -1,8 +1,8 @@
+import { Toaster } from "sonner";
 import { HistoryList } from "./components/HistoryList";
 import { MicButton } from "./components/MicButton";
 import { PreviewBox } from "./components/PreviewBox";
 import { StatusBadge } from "./components/StatusBadge";
-import { Toast } from "./components/Toast";
 import { useRecorder } from "./hooks/useRecorder";
 import { useWebSocket } from "./hooks/useWebSocket";
 
@@ -27,7 +27,7 @@ export function App() {
 				<MicButton onStart={startRecording} onStop={stopRecording} />
 				<HistoryList sendJSON={sendJSON} />
 			</div>
-			<Toast />
+			<Toaster theme="dark" position="bottom-center" />
 		</>
 	);
 }