On Android, long-press selects text via selectionchange while the finger
is still on the screen. The quick action handler was gated by
androidTouchEndRef and silently returned, so no popup ever opened. After
the user lifted, nothing re-ran the gated action.
Track the gated action in a small DeferredActionState ref and flush it
from the native touchend handler, so instant copy/dictionary/wikipedia/
search/translate/tts now fire on the first long-press release.
The browser delivers one large quantised delta per wheel notch, which
Chromium scrolls without interpolation — producing the jerky one-step
motion reported on Windows. Detect mouse-wheel-shaped events inside
the iframe (line-mode, or single-axis with |deltaY| ≥ 50), suppress
the native scroll, and replay the delta as an rAF exponential lerp on
the renderer's container. Trackpad / high-resolution input is left to
native scrolling so its momentum and 2-axis behaviour are preserved.
The TOC occasionally flashed a scroll to the current item and then
snapped back to the top, and on slow mobile first-opens sometimes
stayed at the top entirely.
Root cause: `useOverlayScrollbars({ defer: true })` schedules OS
construction via `requestIdleCallback` with a ~2233 ms timeout. On a
busy first open the timeout fires before the browser goes idle, so OS
wraps the viewport late — and the wrap step resets the scroller's
`scrollTop` synchronously, undoing Virtuoso's earlier scroll to the
current item. Virtuoso's `rangeChanged` / `onScroll` don't propagate
the reset for another frame, so any guard based on tracked scroll
state reads stale.
* feat: Add option to split words in RSVP mode
* fix(rsvp): replace lookbehind regex with lookahead-only split in getHyphenParts
* feat: Add option to split words in RSVP mode
* fix(theme): update data-theme and themeCode when system theme changes
* feat(rsvp): split on ellipsis between letters and preserve delimiter type
* fix(rsvp): fix incorrect merged line
* feat(rsvp): insert blank frame between consecutive identical words
* refactor(sidebar): replace react-window and OverlayScrollbars with react-virtuoso and CSS scrollbars
* feat(toc): smooth scroll to active chapter on sidebar open
* test(theme-store): expand dark theme palette fixture with full color tokens
* refactor: remove dead code and consolidate duplicate CSS scrollbar rules
* fix(toc): fix auto-scroll on sidebar open and improve scroll behavior
- Add isSideBarVisible to scroll effect deps so it fires on sidebar open
- Use setTimeout delay for Virtuoso to finish layout before scrolling
- Add 10s cooldown on user scroll to re-enable auto-scroll
- Use smooth scroll for short distances (<16 items), instant for longer
- Track visible center via rangeChanged for accurate distance calculation
- Fix tab navigation background opacity (bg-base-200 instead of /20)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Huang Xin <chrox.huang@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Huang Xin