Update app.py

app.py

@@ -54,6 +54,9 @@ def text_to_image(prompt: str) -> AgentImage:
     resp = requests.post(url, headers=headers, json={"inputs": prompt}, timeout=120)
     if resp.status_code != 200:
         raise RuntimeError(f"Inference API error {resp.status_code}: {resp.text[:200]}")
+    if not hf_token:
+        raise RuntimeError("HF_TOKEN is missing. Please add it in Settings → Variables and Secrets.")
+
 
     img = Image.open(io.BytesIO(resp.content)).convert("RGB")
     return AgentImage(img)