In the library list view, surface each book's series and series number on
their own line, in addition to the description. Previously series info was
only visible by grouping by series or opening a book's details.
- Add `formatSeries(series, seriesIndex)` helper ("Series #N", trims the
name, omits a zero/NaN/negative index) with unit tests.
- In list mode, render a dedicated single-line "Series #N" line above the
description when the book has series metadata.
- Clamp every list line (incl. title) to one line and tighten the row gap
to `gap-1` so the extra line fits the fixed-height row without clipping.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
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