Add multi-select, marquee, and group duplicate fill to canvas designer

[jeffgo10]

Summary

Extends @jeffgo10/react-canvas-designer with Silhouette-style selection power tools: Shift/Ctrl/Cmd multi-select with a group transform box, marquee rubber-band selection, and duplicate-fill that copies every selected sticker together as a block. Bumps the package to v0.2.15 and updates the /stickpak docs demo plus engineering notes.

Changes

Packages (@jeffgo10/react-canvas-designer v0.2.15)

• Multi-select (v0.2.10–0.2.13): selectedIds array, onSelectedIdsChange callback, Shift/Ctrl/Cmd additive click via selection.ts
• Group transform: proxy selection box + groupTransform.ts preserves relative layout during move/resize/rotate; constrainMultiSelectBoundBox in resizeConstraints.ts
• Marquee (v0.2.14): drag on empty canvas to rubber-band select stickers by cut-line bounds (marqueeSelection.ts); Shift/Ctrl/Cmd adds to selection
• Group duplicate fill (v0.2.15): buildGroupDuplicatesToFit duplicates all selected stickers as a block until printable area is full; exports from index.ts
• Co-located unit tests for all new modules; CanvasDesigner.test.tsx updated

Docs app (apps/docs)

• StickPakCanvasSection wires onSelectedIdsChange and updated helper text for multi-select, marquee, and group duplicate

Docs / Cursor rules

• docs/stickpak/engineering-notes.md, phase-1.md — feature log and pin table
• .cursor/rules/ls-foundry-core.mdc — pin @jeffgo10/react-canvas-designer 0.2.15

Commits

SHA	Message
e217d6d	Add multi-select, marquee, and group duplicate fill to canvas designer.

Test plan

• pnpm test:coverage --filter=@jeffgo10/react-canvas-designer (100 tests pass)
• pnpm run dev --filter=@ls-foundry/docs → /stickpak — Shift-select multiple stickers, marquee drag, group move/rotate, duplicate horizontal/vertical with multi-select
• pnpm run build:packages

Notes / follow-ups

• sticker-print-app: bump pin to @jeffgo10/react-canvas-designer@0.2.15 and wire onSelectedIdsChange for storefront multi-select UX
• Obsidian vault notes synced separately via /sync-obsidian-notes

Made with Cursor