chore: add additional headers only for Openrouter

backend/apps/openai/main.py

@@ -116,9 +116,9 @@ async def speech(request: Request, user=Depends(get_verified_user)):
         headers = {}
         headers["Authorization"] = f"Bearer {app.state.OPENAI_API_KEYS[idx]}"
         headers["Content-Type"] = "application/json"
+        if "openrouter.ai" in app.state.OPENAI_API_BASE_URLS[idx]:
             headers['HTTP-Referer'] = "https://openwebui.com/"
             headers['X-Title'] = "Open WebUI"
-
         r = None
         try:
             r = requests.post(