Add arrow rendering support

[seveibar]

Summary

• add an Arrow type and expose graphics.arrows in the public API
• render arrows with head geometry in canvas, SVG, and interactive views including filtering and layer/step support
• extend utilities and tests to cover arrow bounds, translation/merge behavior, and SVG snapshots

Testing

• BUN_UPDATE_SNAPSHOTS=1 bun test tests/getSvgFromGraphicsObject.test.ts
• bun test tests/getBounds.test.ts
• bun test tests/translateGraphics.test.ts
• bun test tests/mergeGraphics.test.ts
• bunx tsc --noEmit

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Codex Task

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
graphics-debug	Ready	Preview	Comment	Nov 10, 2025 8:16pm