Fix PANNs checkpoint download

api.py

@@ -5,21 +5,25 @@ Snare Scout API - Minimal Gradio
 import os
 import sys
 import gradio as gr
-import numpy as np
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
-# Download PANNs checkpoint if missing
-PANNS_PATH = "/root/panns_data/Cnn14_mAP=0.431.pth"
-if not os.path.exists(PANNS_PATH):
+# Set PANNs path BEFORE importing anything else
+os.environ["PANNS_MODELS_PATH"] = "/root/panns_data"
+PANNS_CHECKPOINT = "/root/panns_data/Cnn14_mAP=0.431.pth"
+
+os.makedirs("/root/panns_data", exist_ok=True)
+
+if not os.path.exists(PANNS_CHECKPOINT):
+    print("📥 Downloading PANNs checkpoint (~320MB)...")
     import urllib.request
-    os.makedirs("/root/panns_data", exist_ok=True)
-    print("📥 Downloading PANNs checkpoint...")
     urllib.request.urlretrieve(
         "https://zenodo.org/record/3987831/files/Cnn14_mAP%3D0.431.pth?download=1",
-        PANNS_PATH
+        PANNS_CHECKPOINT
     )
     print("✅ PANNs checkpoint ready!")
+else:
+    print(f"✅ PANNs checkpoint exists: {os.path.getsize(PANNS_CHECKPOINT)} bytes")
 
 DB_PATH = "library/snare_scout.sqlite"
 if not os.path.exists(DB_PATH):