refactor: improve JSON handling and API reliability

- Add robust JSON sanitization function to handle malformed API responses
- Select club after login for proper session initialization
- Enhance API request headers for better compatibility
- Add JSON parsing fallback with sanitization for malformed files
- Add poetry plugin requirement for export functionality

pyproject.toml

@@ -37,3 +37,6 @@ build-backend = "poetry.core.masonry.api"
 
 [projectscripts]
 myice = 'myice.myice:app'
+
+[tool.poetry.requires-plugins]
+poetry-plugin-export = ">=1.8"