v2.0.0: Enhance GUI and API functionality

- Improved the start_upload method in gui.py to prevent duplicate button clicks and ensure proper platform selection.
- Refactored login function in qiyuehui/apis.py to be asynchronous.
- Cleaned up unused imports and whitespace in multiple files, including upload/honglitong/apis.py and upload/qiyuehui/apis.py.
- Updated the DataForm class in qiyuehui/gui.py to include a new category selection dialog and improved category handling.
- Enhanced the overall structure and readability of the codebase by renaming variables and organizing imports.