feat: tts语音生成

web/src/utils/format.ts

@@ -0,0 +1,7 @@
+export const formatTime = (seconds: number): string => {
+  if (Number.isNaN(seconds) || !Number.isFinite(seconds)) return "00:00";
+
+  const minutes = Math.floor(seconds / 60);
+  const secs = Math.floor(seconds % 60);
+  return `${minutes.toString().padStart(2, "0")}:${secs.toString().padStart(2, "0")}`;
+};