* fix(config): handle UTF-8 BOM in configuration file loading
Problem:
On Windows, some text editors (like Notepad) automatically add UTF-8 BOM
to JSON files when saving. This causes json.decoder.JSONDecodeError:
"Unexpected UTF-8 BOM" and AstrBot fails to start when cmd_config.json
contains BOM.
Solution:
Add defensive check to strip UTF-8 BOM (\ufeff) if present before
parsing JSON configuration file.
Impact:
- Improves robustness and cross-platform compatibility
- No breaking changes to existing functionality
- Fixes startup failure when configuration file has UTF-8 BOM encoding
Relates-to: Windows editor compatibility issues
* style: fix code formatting with ruff
Fix single quote to double quote to comply with project code style.
tangsenfei
351895ae66