Add drag-to-reorder within playlists

Cards in playlist view are draggable. Visual feedback: opacity on
source card, accent border on drop target. Reorder persists to store.

Files:
- frontend/app.js: dragSource state, drag/drop handlers on cards,
  container-level dragover guard in wireUI
- frontend/styles.css: .card.dragging, .card.drag-over styles
This commit is contained in:
Jonathan Sykes
2026-06-14 14:41:05 +08:00
parent a4d6b825d5
commit 0ba0f56a54
6 changed files with 44 additions and 1 deletions