Inconsistent deletion of slur when notes are deleted

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

Consider selecting and deleting any single note this phrase:

What would the user intuitively expect to happen?

• first note: now we have a two note phrase. The slur should be shortened to connect them.
• second note: now we have two disconnected notes, so there shouldn't be a slur anymore. It should be deleted.
• third note: now we have a two note phrase. The slur should be shortened to connect them.

Remarkably, all three of these expectations are wrong, in different ways:

• first note: the slur is deleted
• second note: the slur is retained, spanning a rest
• third note: the slur is retained and now ends on a rest

https://github.com/user-attachments/assets/c925ccb9-f70a-43c9-9464-dd10b7cd136a

There are probably arguments for the current behaviour when deleting a note in the middle of or end of a slur, but I think the inconsistency between deleting the first note and the last note of the slur has to be considered a bug.

Supporting files, videos and screenshots

See above

In which versions of MuseScore Studio is this issue present?

4.75.

Regression

I was unable to check

Operating system

macOS

Additional context

No response

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible