- Home: lock category carousel height to the tallest page so the
Official Recommendations section below does not jump up when
swiping to a page with fewer categories.
- CollapsibleText: raise default threshold to 25 lines and tighten
the spacing between the expand-all button and the timestamp
(drop the fixed h-8 and use mt-1 instead of mt-1.5).
- formatTime: always render dates as yyyy/m/d HH:mm regardless of
locale, matching the requested timestamp format.
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