feat(reader): shortcuts help modal + desktop edge page-turn zones

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Help menu (the reader had a growing shortcut/gesture vocabulary with
no discoverability): a ? topbar button, the '?' key, and F1 open a
glass modal listing navigation, zoom/pan, highlight, and touch
gesture reference — format-aware (fixed-layout/PDF rows appear only
where they apply), Esc closes it first in the dismiss chain.

Desktop edge zones: clickable page-turn strips on the left/right
viewport edges (8% width, 44-72px), desktop only (hover+fine-pointer
media query — touch devices use tap zones, avoiding double paging).
Hovering reveals a chevron arrow and a subtle edge gradient. Zones
disable (pointer-events pass-through) while a fixed-layout page is
zoomed so edge clicks belong to content: panning, selection,
highlight editing. fxZoomed tracks zoom state via the renderer zoom
event, reset/fit actions, and init.

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john-okeefe

2026-08-18 07:59:26 -04:00

parent 1a07635605

commit 94be6edceb

5 changed files with 254 additions and 13 deletions

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