Moving a card to another bucket took a visible round-trip (PATCH +
reloadAll) during which the card sat unchanged in the source bucket,
leaving the user wondering if the drop registered. Now every
bucket-move path marks the affected cards `.card-moving` as soon as
the action fires: 50% opacity, dark scrim and a centred accent-ring
spinner. The next renderBoard() rebuilds the DOM so the class comes
off automatically — no explicit cleanup needed.
Call sites:
- drag-drop onto a bucket tile (single + multi-select)
- drag onto an existing bucket to nest it (auto-super-bucket create)
- context-menu → Bucket → <target>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
thandClaude Opus 4.7
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