Ability to export chats using a time range (instead of number of messages)

[nekohayo]

Your use case

The basic chat log exporting feature implemented in #2630 works, but I find it very limiting when you can only specify these types of ranges:

• "Current timeline":
  It is unclear what this actually does. Like, what constitutes the beginning and end of "current"?
• "From the beginning":
  Very rarely do you actually want to do this.
• "Specify a number of messages":
  I never know exactly what amount of messages I want to export, because I'm not going to start counting them myself... so in practice I always end up vastly underestimating or vastly overestimating.

I would like to be able to export using a range of dates (and/or hours, depending on the situation).
Ex: from YYYY-MM-DD HH:MM to YYYY-MM-DD, or "last 6 hours", etc.

Have you considered any alternatives?

No response

Additional context

No response

[t3chguy]

Related #19310

[nekohayo]

Indeed, I was not able to find that other ticket because it was titled too generically; that said, it also talks about other features / a wider scope. This ticket here is a subset of it that could potentially be implemented independently as a first step.