[feat/MAT-363] Zoom/Pan 인프라#305
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- transform.ts: ViewTransform, screenToCanvas, canvasToScreen, clampTransform, transformToMatrix3 - render/rendererTypes.ts: RendererViewport 타입 - canvas/useCanvasViewportController.ts: 뷰포트 관리 (스크롤/줌 모드, 캔버스 높이 자동 확장) - canvas/useCanvasGestureComposer.ts: 제스처 조합 (1-finger draw + 2-finger pinch/pan) - DrawingCanvas 통합은 MAT-364에서 진행 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
뷰포트 변환(Zoom/Pan) 인프라를 도입합니다.
useCanvasViewportController, useCanvasGestureComposer, transform.ts로 핀치/팬 제스처를 처리합니다.
Linear
Changes
canvas/useCanvasViewportController.ts— 뷰포트 상태 관리, 핀치/팬canvas/useCanvasGestureComposer.ts— 제스처 합성 (드로잉 + 뷰포트 전환)transform.ts— ViewTransform, IDENTITY_TRANSFORM, screenToCanvas, canvasToScreenrender/rendererTypes.ts— RendererViewport 타입Testing
pnpm typecheck통과pnpm lint통과Risk / Impact