Akiba So
4fb431727e
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"优化橡皮擦工具，你优化在哪" — the eraser already did segment erase, but the radius was a hardcoded const with no size control and no whole-stroke mode. Add both, OneNote/Notability-style: - PenConfig: eraserRadius (0.005-0.1, default 0.02) + eraserWholeStroke bool, with copyWith / JSON / setters. - PenCanvas: uses widget.eraserRadius for the live hit area AND the cursor preview (they stay in sync); eraserWholeStroke=true removes the whole stroke on contact, false keeps the segment-split behavior. - pen_editor threads both from PenConfig. - pen-settings: new Eraser section — size slider + "Stroke Eraser" switch. Tests: pen_eraser_mode_widget proves point-eraser keeps the untouched ends while stroke-eraser deletes the whole stroke from the same pass. flutter analyze: 0 issues. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>