fix: correct file path for tts audio

services/tts.ts

@@ -61,7 +61,7 @@ export async function generateTTS(
     fs.mkdirSync(outputDir, { recursive: true });
   }
 
-  const filePath = path.resolve(outputDir, `${itemId}.wav}`); // Use the provided filename directly
+  const filePath = path.resolve(outputDir, `${itemId}.wav`); // Use the provided filename directly
   console.log(`音声ファイル保存開始: ${filePath}`);
   fs.writeFileSync(filePath, audioBuffer);
   console.log(`音声ファイル保存完了: ${filePath}`);