---
id: T02
parent: S02
milestone: M002
provides: []
requires: []
affects: []
key_files: ["app/src/components/canvas/KonvaStage.tsx", "app/src/views/DesignCanvas.tsx", "app/src/views/DesignCanvas.module.css", "app/src/App.tsx", "app/src/App.css"]
key_decisions: ["Artboard centered on stage via computed offsets; object positions stored relative to artboard origin", "SVG import uses Blob URL → Image element → Konva.Image with auto-scale to fit artboard", "Used :has() CSS selector on #app to override #root width constraint for canvas view"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Ran `cd app && npx tsc --noEmit` — zero type errors under strict mode with noUnusedLocals/noUnusedParameters. Ran `cd app && npx vitest run --reporter=verbose` — all 71 tests pass (6 test files, 0 failures)."
completed_at: 2026-03-26T05:36:12.587Z
blocker_discovered: false
---

# T02: Built KonvaStage with artboard rendering, shape tools, selection handles, rubber-band multi-select, SVG import, and DesignCanvas view container

> Built KonvaStage with artboard rendering, shape tools, selection handles, rubber-band multi-select, SVG import, and DesignCanvas view container

## What Happened
---
id: T02
parent: S02
milestone: M002
key_files:
  - app/src/components/canvas/KonvaStage.tsx
  - app/src/views/DesignCanvas.tsx
  - app/src/views/DesignCanvas.module.css
  - app/src/App.tsx
  - app/src/App.css
key_decisions:
  - Artboard centered on stage via computed offsets; object positions stored relative to artboard origin
  - SVG import uses Blob URL → Image element → Konva.Image with auto-scale to fit artboard
  - Used :has() CSS selector on #app to override #root width constraint for canvas view
duration: ""
verification_result: passed
completed_at: 2026-03-26T05:36:12.599Z
blocker_discovered: false
---

# T02: Built KonvaStage with artboard rendering, shape tools, selection handles, rubber-band multi-select, SVG import, and DesignCanvas view container

**Built KonvaStage with artboard rendering, shape tools, selection handles, rubber-band multi-select, SVG import, and DesignCanvas view container**

## What Happened

Created KonvaStage component rendering artboard backgrounds (Rect/Circle/Ellipse/Path based on ArtboardConfig shape), all five CanvasObject types mapped to Konva primitives with drag/transform handlers, Transformer synced to selected nodes, and rubber-band selection rectangle. Built DesignCanvas view container with top toolbar (tool buttons + undo/redo), ResizeObserver-driven canvas sizing, artboard setup flow, and SVG import that converts SVG string to Blob URL, auto-scales to fit artboard, and adds as ImageObject. Updated App.tsx to wire DesignCanvas with real props and added toolbar/artboard styles to App.css.

## Verification

Ran `cd app && npx tsc --noEmit` — zero type errors under strict mode with noUnusedLocals/noUnusedParameters. Ran `cd app && npx vitest run --reporter=verbose` — all 71 tests pass (6 test files, 0 failures).

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd app && npx tsc --noEmit` | 0 | ✅ pass | 2300ms |
| 2 | `cd app && npx vitest run --reporter=verbose` | 0 | ✅ pass | 2060ms |


## Deviations

None.

## Known Issues

None.

## Files Created/Modified

- `app/src/components/canvas/KonvaStage.tsx`
- `app/src/views/DesignCanvas.tsx`
- `app/src/views/DesignCanvas.module.css`
- `app/src/App.tsx`
- `app/src/App.css`


## Deviations
None.

## Known Issues
None.
