## Summary - Removes the `AlertDialog` popup that appeared when tapping delete in thread view - Deletion now happens immediately, matching the behaviour of the single mail view - The existing `UndoShell` widget already listens for new `UndoAction` pushes and shows a snack bar with an **Undo** button — no extra UI code needed Closes #398 Co-authored-by: Thomas SharedInbox <sharedinbox@thomas-guettler.de> Reviewed-on: https://codeberg.org/guettli/sharedinbox/pulls/402