fix: 前端录音改用WAV格式（PCM 16kHz），兼容模型端

main.py

@@ -39,4 +39,11 @@ async def index():
 
 if __name__ == "__main__":
     PORT = int(os.getenv("PORT", "19019"))
-    uvicorn.run(app, host="0.0.0.0", port=PORT)
+    SSL_KEY = os.getenv("SSL_KEY", "key.pem")
+    SSL_CERT = os.getenv("SSL_CERT", "cert.pem")
+    
+    # 检查是否有 SSL 证书
+    if os.path.exists(SSL_KEY) and os.path.exists(SSL_CERT):
+        uvicorn.run(app, host="0.0.0.0", port=PORT, ssl_keyfile=SSL_KEY, ssl_certfile=SSL_CERT)
+    else:
+        uvicorn.run(app, host="0.0.0.0", port=PORT)