An idea @Falco and I kicked around for quite a while was “guided summary” option.
Like you have custom prompts for “helper” allow you to enter a custom prompts for summary.
I can envision a system like this solving this issue.
We would need to work out the UI and long term persistence for custom prompts like this, but I feel like it could help.
Another idea (and something that already exists but could be refined is)
“Talk to my topic” - if you are chatting to a chatbot in a chat window and a topic is on the screen, the topic becomes context. This would take a bit of persona fiddling cause the current context is somewhat limited.