fix: add output_type=mesh to Hunyuan3D API - fixes list index out of range error

generators/hunyuan.py

@@ -58,7 +58,7 @@ class HunyuanGenerator:
             )
             print(f"[Hunyuan3D] Connected successfully")
             
-            # Call API
+            # Call API with correct output_type
             print(f"[Hunyuan3D] Calling API with parameters...")
             result = self._call_api(
                 client,
@@ -74,6 +74,7 @@ class HunyuanGenerator:
                 check_box_rembg=True,
                 num_chunks=preset.num_chunks,
                 randomize_seed=True,
+                output_type="mesh",  # CRITICAL: Specify mesh output to get GLB file
                 api_name="/shape_generation"
             )
             print(f"[Hunyuan3D] API call completed")