Simplify --download-model: use cache module directly

- Remove auto-detection logic, just use download_model from cache
- User can specify --download-file-pattern for non-GGUF models

codai/main.py

@@ -104,39 +104,11 @@ def main():
     if args.download_model:
         print(f"\n=== Downloading Model: {args.download_model} ===")
 
-        from codai.models.cache import download_model, is_huggingface_model_id
-        from huggingface_hub import list_repo_files
-
-        # Determine file pattern for HF downloads
-        file_pattern = args.download_file_pattern
-        if file_pattern is None:
-            model_id = args.download_model
-            if is_huggingface_model_id(model_id):
-                # It's a HuggingFace model ID - try to detect available files
-                print("Scanning HuggingFace repo for available files...")
-                try:
-                    files = list(list_repo_files(model_id))
-                    print(f"Found {len(files)} files in repo")
-                    
-                    # Try common patterns in order of preference
-                    patterns = ['.gguf', '.safetensors', '.bin', '.pt', '.pth']
-                    for pattern in patterns:
-                        matching = [f for f in files if f.endswith(pattern)]
-                        if matching:
-                            file_pattern = pattern
-                            print(f"Auto-detected file pattern: {file_pattern} (found {len(matching)} file(s))")
-                            break
-                    
-                    if not file_pattern:
-                        print("Warning: Could not auto-detect file pattern, using .gguf")
-                        file_pattern = '.gguf'
-                except Exception as e:
-                    print(f"Warning: Could not list repo files: {e}")
-                    file_pattern = '.gguf'
-            else:
-                # URL or local - no pattern needed
-                file_pattern = ''
-        else:
+        from codai.models.cache import download_model
+
+        # Use provided file pattern or default to .gguf
+        file_pattern = args.download_file_pattern if args.download_file_pattern else '.gguf'
+        if args.download_file_pattern:
             print(f"File pattern: {file_pattern}")
 
         try: