Fix and refactor a whole bunch

[n0kovo]

Not thoroughly tested, but conversations work as of today.
Below is Claude's own summary of the changes :)

Key Changes

1. Added comprehensive type annotations
2. Introduced ContentType enum for standardization
3. Improved error handling with raise_for_status()
4. Centralized header management
5. Refactored stream processing in send_message
6. Simplified file handling, especially for text files
7. Moved constants to class-level attributes
8. Implemented dynamic local timezone detection
9. Improved JSON handling and error management
10. Enhanced PEP 8 compliance

Impact

• More robust and maintainable codebase
• Improved type safety and developer experience
• Easier to understand, debug, and extend

Next Steps

• Add unit tests
• Review error handling
• Update documentation

Please ensure all existing functionality remains intact, particularly file uploads and stream processing.

[Deng-Xian-Sheng]

now code ok work

this is vrey good

but author not update git hub

so, you what not open new library?

this is my page link:https://blog.csdn.net/Deng_Xian_Sheng/article/details/141690921?spm=1001.2014.3001.5502

success error demo ....

sorry me use chinease , I not time to en