Context Length Filter

This function controls the context window length.

1. N Last Messages: Controls the maximum number of messages, defaults to 4 (excluding system prompts).
2. Max Chars: Controls the maximum number of characters, defaults to -1 (no limit).
   • This limit only applies if the character count of the 'N Last Messages' exceeds the 'Max Chars' value.
3. Add a dialog box button, clicking it can activate the function (requires enabling the function + enabling global effectiveness)
4. Automatically filter all images in historical conversations, only keeping the last image for upload to save tokens. If you need to keep all images, you can click the button to deactivate the function.