Add model verification with torch.load to catch format issues

app.py

@@ -91,12 +91,28 @@ for fname, target_dir in files_to_download:
             print(f"✗ FAILED to download {fname}", flush=True)
             all_ok = False
 
+# Verify model file can be loaded
+if all_ok:
+    print("=== Verifying model file ===", flush=True)
+    try:
+        import torch
+        pth_path = weights_dir / "OldChineseMan.pth"
+        print(f"Loading {pth_path}...", flush=True)
+        state = torch.load(pth_path, map_location="cpu")
+        print(f"✓ Model loaded. Keys: {list(state.keys())[:10]}...", flush=True)
+        if "config" in state:
+            print(f"  Config: {state['config']}", flush=True)
+    except Exception as e:
+        print(f"✗ Model verification failed: {e}", flush=True)
+        all_ok = False
+
 if not all_ok:
-    print("⚠ Some model files failed to download. Inference may fail.", flush=True)
+    print("⚠ Some model files failed verification. Inference may fail.", flush=True)
 else:
-    print("=== All model files ready ===", flush=True)
+    print("=== All model files ready and verified ===", flush=True)
 
 # 5. Launch RVC WebUI (webui.py is the new entry point)
+print("=== Starting RVC WebUI ===", flush=True)
 run([
     sys.executable,
     "webui.py",