yellowjacket/.planning/quick/3-add-multi-select-to-playlist-view-with-c/3-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, decisions, metrics

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics
quick	3	frontend/playlist-view	multi-select batch-delete UX playlist	requires provides affects playlist-multi-select playlist-batch-delete playlist-view	added patterns Set-based-selection modifier-key-handling	modified frontend/src/components/playlist-view/playlist-view.ts	Used simple Set<number> for playlist selection (matching cover-grid pattern) instead of a second SelectionController — playlists are index-based and few in number Playlist-level and track-level selections are mutually exclusive to prevent confusing UX	duration completed 2 min 2026-02-28T19:15:35Z

Quick Task 3: Add Multi-Select to Playlist View with Batch Delete Summary

One-liner: Playlist-level Ctrl+Click/Shift+Click multi-select with adaptive context menu and batch delete

What Was Done

Task 1: Add playlist-level multi-select state and selection handling

Commit: e13151f

• Added selectedPlaylists: Set<number> state and lastSelectedPlaylistIndex anchor for range selection
• Replaced handleToggle with handlePlaylistHeaderClick that handles three modes:
  • Ctrl/Cmd+Click: Toggle individual playlist in/out of selection
  • Shift+Click: Range-select from anchor to clicked playlist (inclusive)
  • Plain click: Clear selection and expand/collapse as before
• Added mutual exclusion: entering track selection scope (ensureSelectionScope) clears playlist selection
• Added .playlist-header.selected CSS class with blue highlight (--yj-selection-bg)
• Updated clearSelectionHandler to also clear playlist selection on outside clicks
• Wired header @click to new handler and added selected class binding in template

Task 2: Wire playlist context menu to support batch delete

Commit: c92ced2

• Updated handlePlaylistContextMenu to respect existing multi-selection: if right-clicked playlist is already selected, preserve the selection; otherwise replace with single selection
• Made onPlaylistContextAction async to support awaiting batch delete operations
• Added batch delete: when selectedPlaylists.size > 1, iterates all selected playlist IDs calling DeletePlaylist for each, then refreshes once
• Context menu adapts based on selection count:
  • Multi-select (>1): Shows "Delete N Playlists" only (rename hidden)
  • Single (<=1): Shows "Rename" + "Delete Playlist" as before
• Clears playlist selection after any context action completes

Deviations from Plan

None — plan executed exactly as written.

Verification

• TypeScript compilation passes with zero errors (npx tsc --noEmit)
• Pre-commit hooks (frontend-typecheck) pass on both commits

Self-Check: PASSED

• All modified files exist on disk
• Both task commits verified in git history (e13151f, c92ced2)