fix: add baseURL to OpenAI initialization and correct audio file type (#299)

Author: JacobLinCool

src/lib/stt/openai.ts

@@ -1,12 +1,12 @@
 import { env } from '$env/dynamic/private';
 import { OpenAI } from 'openai';
 
-const openai = new OpenAI({ apiKey: env.OPENAI_API_KEY });
+const openai = new OpenAI({ apiKey: env.OPENAI_API_KEY, baseURL: 'https://api.openai.com/v1' });
 
 export async function transcribe(data: Buffer): Promise<string> {
 	const transcription = await openai.audio.transcriptions.create({
 		prompt: '請將語音確實轉錄，使用的主要語言為臺灣繁體中文，次要語言為英語。',
-		file: new File([data], 'audio.mp3', { type: 'audio/mp3' }),
+		file: new File([data], 'audio.mp3', { type: 'audio/mpeg' }),
 		model: 'gpt-4o-transcribe'
 	});