Add manual width/height input for selected stickers (SP-008)

[jeffgo10]

Summary

Implements SP-008: let users set a selected sticker's size by typing exact width and/or height in mm/cm/in, with optional aspect-ratio lock. Adds engine APIs in @jeffgo10/shared-types and @jeffgo10/react-canvas-designer, plus a demo on the docs /stickpak page.

Changes

Packages (@jeffgo10/*)

• shared-types@0.2.2 — unitToCanvasPixels() (inverse of canvasPixelsToUnit)
• react-canvas-designer@0.2.31 — computeScaleFromUnitDimensions(), CanvasDesignerHandle.setSelectedSize(); respects minResizeSizeMm and canvas margin clamping

Canvas designer

• Single-select resize from typed physical dimensions
• Optional lockAspectRatio (default true) — changing one axis scales the other proportionally
• Konva node + transformer stay in sync after programmatic resize

Docs app (apps/docs)

• /stickpak — width/height number inputs when one sticker is selected (blur or Enter to apply)
• Aspect-ratio lock checkbox; fields sync via onSelectionDimensionsChange

Docs / agent tooling

• docs/stickpak/engineering-notes.md, phase-1.md — SP-008 entry and version pins
• .cursor/rules/ls-foundry-core.mdc — pin table updated

Commits

SHA	Message
cf0c97f	Add manual width/height input for selected stickers (SP-008).

Test plan

• pnpm test --filter=@jeffgo10/shared-types --filter=@jeffgo10/react-canvas-designer
• pnpm run build:packages
• pnpm run dev --filter=@ls-foundry/docs → /stickpak — select sticker, type new width/height, confirm canvas resize + aspect lock toggle

Notes / follow-ups

• Package bumps included; CI publish on merge to master will deploy @jeffgo10/shared-types@0.2.2 and @jeffgo10/react-canvas-designer@0.2.31
• Storefront follow-up: wire same inputs in designer toolbar via setSelectedSize + onSelectionDimensionsChange (sticker-print-app)
• Obsidian kanban SP-008 remains In Progress until storefront wiring or explicit move to Merged to Dev

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