[Bug] /feedback command text input truncates display and loses cursor tracking after ~3 lines

Bug Description
In the new TUI (and perhaps even the old one), when using the /feedback command, space to type the message is limited. After roughly 3 lines are full in my terminal, the display switches to only displaying the first line, which at the end of the line is suffixed with "…".

This makes it hard to type a longer message. Also, cursor movement is then not reflected anymore, so it's easy to type text into an undesired space (for example, I wanted to append text to the message, and it showed up somewhere toward the end (last-but-1 line, not last line) and jumble the message.

It would be very helpful to have at least one of the following:

1. The modal(?) window that houses the feedback form expands vertically when more space is needed, e.g. when more text is typed. (also reported as #87580)
2. The text input supports ctrl+g to open the default editor (e.g. vim), just like the normal prompt input does. (this one is new, doesn’t have a ticket yet, apparently)

My current workaround: Open VIM in a separate terminal tab, type the message there, then copy & paste into /feedback. Possible, but will probably deter users from even typing & sending feedback.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.267
• Feedback ID: 4fd54336-996f-4312-9a2d-4ac60aba0978

Errors

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