Update app.py

app.py

@@ -1,6 +1,7 @@
 import os
 os.environ.setdefault("GRADIO_USE_CDN", "true")
 import sys
+import spaces
 import subprocess
 from pathlib import Path
 from typing import Tuple, Optional
@@ -17,6 +18,16 @@ WEIGHTS_FILE = "model.safetensors"   # from the HF model repo
 CACHE_DIR = SPACE_ROOT / "weights"
 CACHE_DIR.mkdir(parents=True, exist_ok=True)
 
+# --- ZeroGPU compatibility (no behavior change) ---
+USE_ZEROGPU = os.getenv("SPACE_RUNTIME", "").lower() == "zerogpu"
+if USE_ZEROGPU:
+    import spaces
+
+    @spaces.GPU(duration=60)
+    def _zgpu_dummy():
+        # Minimal GPU-annotated function so ZeroGPU runtime is satisfied.
+        # We never call this; actual inference stays CPU unless you choose otherwise.
+        return "ok"        
 # ---------- 1) Pull weights from HF Hub ----------
 def get_weights_path() -> Path:
     weights_path = hf_hub_download(