Pumps PenCanvas with a plain Container as the page widget (no pdfrx/pdfium) and
simulates gestures to verify the INTEGRATED live path end-to-end: a stylus drag
commits a multi-point stroke; a single finger is rejected when finger-drawing is
off but draws when on; a 2nd pointer cancels an in-progress stylus stroke
(pinch/palm); committed strokes render through the revision-gated render cache
(eca5141) with no exception. Real behavioral evidence for the arbiter + render
swap beyond static analysis — without a device.
flutter analyze lib/editor clean; 233/233 tests (+5 widget).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Akiba So
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