## 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
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Summary
AlertDialogpopup that appeared when tapping delete in thread viewUndoShellwidget already listens for newUndoActionpushes and shows a snack bar with an Undo button — no extra UI code neededCloses #398