Can't delete quote-reply draft in chat with former Signal user

[yawnoc]

Guidelines

• I have searched searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

Bug description

Steps to reproduce

1. Open a non-empty chat with a contact who was previously a Signal user but is now no longer a Signal user.
2. Swipe right on a Signal message to quote-reply.

Expected behaviour

• Nothing happens.

Actual behaviour

• A quote-reply draft is created (as evidenced by the soft keyboard spawning).
• This quote-reply draft persists despite closure of the chat and of Signal itself.
• This quote-reply draft (attached to the input box) is immediately replaced with the "This person is no longer using Signal [...] Invite to Signal" footer whenever the chat is opened.
• This quote-reply draft is therefore undeletable. This is undesirable.
• If the chat is archived, opening the chat will immediately unarchive the chat because Signal will update the time of the quote-reply draft to now. This is highly undesirable.

A similar issue with a sharing draft with a former Signal user is noted by ateuber in #4134.

How I think this should be fixed

• Swipe right on a Signal message should be modified to have no effect if the contact is no longer a Signal user.
• Draft messages should be automatically deleted if the contact is no longer a Signal user.

Screenshots

No response

Device

Pixel 7a

Android version

16

Signal version

7.47.2

Link to debug log

No response