Option to remove all messages within a single chat window

Please provide the option to completely remove all messages from a single chat. I use a single chat window (I don't create one for every question or topic I ask) since it's easier for me to manage my model settings this way. I would like the option to have one of the following on a per chat window setting or just in general:

1. Clear messages older than X days

2. Retain only last X message in chat window (affected by context limit of course)

3. Have the option to clear all messages in a chat window

4. Have the option to clear all messages in a chat window when "Clear Context" button is clicked