Fix startup hang: 使用 local_files_only=True

code/demo.py

@@ -326,36 +326,36 @@ def generate_ldr_gpu(ldr_content, ldr_path):
     is_hf_space = os.getenv("SPACE_ID") is not None
 
     if is_hf_space:
-        # HF Spaces: Download all 3 checkpoints from Model Hub
+        # HF Spaces: Use pre-downloaded weights from build-time cache
         from huggingface_hub import hf_hub_download
-        print("📥 Downloading model weights from HuggingFace Hub...")
+        print("📂 Loading pre-cached model weights from build...")
 
-        # Download base GPT model (7.17 GB)
+        # Load base GPT model (7.17 GB, pre-downloaded during build)
         gpt_ckpt_path = hf_hub_download(
             repo_id="0xZohar/object-assembler-models",
             filename="shape_gpt.safetensors",
             cache_dir=HF_CACHE_DIR,
-            local_files_only=False
+            local_files_only=True
         )
-        print(f"   ✓ Base GPT model loaded")
+        print(f"   ✓ Base GPT model loaded from cache")
 
-        # Download shape tokenizer (1.09 GB)
+        # Load shape tokenizer (1.09 GB, pre-downloaded during build)
         shape_ckpt_path = hf_hub_download(
             repo_id="0xZohar/object-assembler-models",
             filename="shape_tokenizer.safetensors",
             cache_dir=HF_CACHE_DIR,
-            local_files_only=False
+            local_files_only=True
         )
-        print(f"   ✓ Shape tokenizer loaded")
+        print(f"   ✓ Shape tokenizer loaded from cache")
 
-        # Download fine-tuned adapter (1.68 GB)
+        # Load fine-tuned adapter (1.68 GB, pre-downloaded during build)
         save_gpt_ckpt_path = hf_hub_download(
             repo_id="0xZohar/object-assembler-models",
             filename="save_shape_cars_whole_p_rot_scratch_4mask_randp.safetensors",
             cache_dir=HF_CACHE_DIR,
-            local_files_only=False
+            local_files_only=True
         )
-        print(f"   ✓ Fine-tuned adapter loaded")
+        print(f"   ✓ Fine-tuned adapter loaded from cache")
     else:
         # Local environment: Use local paths (matching original demo.zip structure)
         gpt_ckpt_path = 'temp_weights/shape_gpt.safetensors'