feat: full format compatibility adaptation for model downloads

- Add get_model_urls() and download_model() to api.py and api_complete.py
  supporting all 14 discovered urlResult format keys (glb, obj, pbr maps, etc.)
- Update generator.py to extract full urlResult dict instead of just modelUrl
- Add CLI subcommands: formats (list available formats) and download (fetch by key)
- Update reverse engineering docs with complete format key table and CLI examples

hunyuan3dweb/cli.py

@@ -31,6 +31,18 @@ def main():
     status_parser.add_argument("creation_id", help="创作ID")
     status_parser.add_argument("--cookies", "-c", default=_DEFAULT_COOKIE, help="Cookie文件路径")
 
+    formats_parser = subparsers.add_parser("formats", help="列出创作可用下载格式")
+    formats_parser.add_argument("creation_id", help="创作ID")
+    formats_parser.add_argument("--cookies", "-c", default=_DEFAULT_COOKIE, help="Cookie文件路径")
+
+    download_parser = subparsers.add_parser("download", help="下载指定格式模型")
+    download_parser.add_argument("creation_id", help="创作ID")
+    download_parser.add_argument("--format", "-f", default="glb",
+                                 help="格式键名 (默认: glb)")
+    download_parser.add_argument("--output", "-o", default=None,
+                                 help="本地保存路径 (默认自动推断)")
+    download_parser.add_argument("--cookies", "-c", default=_DEFAULT_COOKIE, help="Cookie文件路径")
+
     args = parser.parse_args()
 
     if not args.command:
@@ -49,6 +61,16 @@ def main():
         print(json.dumps(result, indent=2, ensure_ascii=False))
     elif args.command == "status":
         print(json.dumps(api.get_generation_status(args.creation_id), indent=2, ensure_ascii=False))
+    elif args.command == "formats":
+        urls = api.get_model_urls(args.creation_id)
+        if not urls:
+            print("暂无可用格式，可能生成未完成或失败。", file=sys.stderr)
+            sys.exit(1)
+        for key, url in urls.items():
+            print(f"{key}: {url}")
+    elif args.command == "download":
+        path = api.download_model(args.creation_id, args.format, args.output)
+        print(f"已下载: {path}")
 
 
 if __name__ == "__main__":