## CHANGES
- Updated anthropic-sdk-go from v0.2.0-alpha.4 to v0.2.0-alpha.11
- Added Claude 3.7 Sonnet models to available model list
- Added ModelClaude3_7SonnetLatest to model options
- Added ModelClaude3_7Sonnet20250219 to model options
- Removed ModelClaude_Instant_1_2 from available models
- Enable and improve custom API base URL configuration
- Add proper handling of v1 endpoint for UUID-containing URLs
- Implement URL formatting logic for consistent endpoint structure
- Clean up commented code and improve configuration flow
