feat: MaskEditor UI component (#532) - #550

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issue/532-mask-editor

Commits on May 19, 2026

feat: add MaskEditor UI shell with design tokens, tool rail, inspector panels, and Storybook stories

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feat: implement real canvas interactions for MaskEditor

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feat: wire all MaskEditor buttons, keyboard shortcuts, and remove brush tool

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feat: wire cv.grabCut() and cv.Canny() contour snap via @opencvjs/web WASM

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feat: wire GrabCut hints canvas, fix snap overlay and vertex selection

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feat: separate polygon close-path from apply-to-mask

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fix: polygon vertices persist across tool switches

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fix: loading spinners for grabcut/snap, fix polygon preview line residue

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fix: polygon visibility, Enter-to-apply race, opencv loading indicator

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feat: unified undo history covering mask, hints, and polygon state

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feat: add eraser tool

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