Only show undo toasts for queue-replacing actions

[ingoau]

Summary

This change refines the undo/redo toast behavior to only announce actions that replace or clear the queue (like playing an album or clearing the queue), while keeping other mutations (like rating a track or toggling shuffle) quietly undoable via the undo button and keyboard shortcuts.

Key Changes

• Added replacesQueue field to undo entries: The core now tracks which undo actions replace or empty the queue via a new replaces_queue boolean in UndoEntry, determined by the action kind ("playContext", "playTracks", "clearQueue", "restoreSavedQueue").

• Filtered toast announcements: The renderer only shows toast notifications for undo entries where replacesQueue is true, reducing notification noise while preserving full undo functionality.

• Added undoEntryId to toast data: Toast messages now include a reference to their associated undo entry, allowing the renderer to filter "Undid…" / "Redid…" toasts to only show for queue-replacing actions.

• Updated undo state tracking: The reducer now maintains a queueReplacingUndo list to identify which undo entries should have their action toasts displayed.

• Simplified toast API: Removed the undoable parameter from the fake core's toast() method since only queue-replacing actions get undo toasts now.

• Updated tests and e2e specs: Test expectations now reflect that only queue-replacing actions (like playing an album) show toasts, while other mutations (like shuffle or rating) remain silent but still undoable.

Implementation Details

• The replaces_queue determination happens in the core's undo module based on action kind, ensuring consistency across platforms.
• Toast filtering in the renderer checks both the undoEntryId field and the queueReplacingUndo list to suppress non-queue-replacing undo toasts.
• The undo button and keyboard shortcuts (Ctrl+Z / Ctrl+Shift+Z) continue to work for all mutations regardless of toast visibility.

https://claude.ai/code/session_01CMp2CmvGbYrTBopB2qgTsY