In a PDF two-page spread at a fractional devicePixelRatio (Windows display
scale 150% -> dpr 1.5), a one-pixel white bar appeared at the spine on certain
zoom levels. foliate-js' pdf.js sized the page canvas only via its bitmap, so
the fractional viewport width was truncated and the canvas rendered up to ~1
device pixel narrower than the page box, exposing the background at the spine.
Bump the foliate-js submodule to the fix (readest/foliate-js#35) which pins an
explicit canvas CSS size to the un-truncated viewport dimensions, and add a
regression test that drives render() at dpr 1.5 and asserts the canvas fills
its box exactly.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
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