• Add Save and Reload button to avoid manually toggling the plugin on and off every time settings change. Now, clicking on either button triggers a plugin reload to let the new settings take effect

• Fix error handling
  • No more "model_not_found" when the user has no access to the model, now it explicitly says you have no access
  • Shows the missing API key message when the chat model is not properly initialized
  • Shows model switch failure when Azure credentials are not provided
• Show the actual model name and chain type used in debug messages
• Make gpt-4-turbo the default model