Extends the in-app sprite editor with four feature sets:
- Shape tools: line (L), rectangle (R), ellipse (O) with click-drag live
preview and a FILL toggle for outline vs filled rect/ellipse.
- Select & move: rectangular marquee (M) to select, drag-to-move via a
floating layer, arrow-key nudge, and clipboard ops (Ctrl+C/X/V, Delete,
Enter/Esc to commit). Undo/redo and save auto-bake any pending move.
- Reference overlay: load any image as an adjustable-opacity backdrop to
trace over (rendered under the artwork), with a show/hide toggle.
- Color tools: brush opacity slider, persistent custom palette
(localStorage; right-click to remove), and an auto-updating recent colors row.
Cache-bust admin assets to ?v=20260609c so the update loads without a manual
hard-refresh.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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