Add diagnostic logging for label mapping file loading

code/cube3d/config.py

@@ -202,8 +202,17 @@ def get_mapping_paths(mapping_type: str = "subset_1k") -> Tuple[str, str]:
     forward_path = LABEL_MAPPINGS[mapping_type]["forward"]
     inverse_path = LABEL_MAPPINGS[mapping_type]["inverse"]
 
+    # Diagnostic logging for HF Spaces debugging
+    print(f"🔍 [DEBUG] get_mapping_paths() called for: {mapping_type}")
+    print(f"   PROJECT_ROOT: {PROJECT_ROOT}")
+    print(f"   Forward path: {forward_path}")
+    print(f"   Inverse path: {inverse_path}")
+    print(f"   Forward exists: {forward_path.exists()}")
+    print(f"   Inverse exists: {inverse_path.exists()}")
+
     # Check if files exist
     if forward_path.exists() and inverse_path.exists():
+        print(f"   ✅ Both files exist, returning paths")
         return str(forward_path), str(inverse_path)
 
     # Files don't exist - generate from LDR files as fallback