Adds a primary/secondary sort pair so users can group by author and have
each author's books drilled-in list sort by series, without touching the
sort menu each time. Closes#4307.
- New "Then by..." picker in the library view menu (None + same keys as
primary). Secondary acts as tiebreaker for the global sort, and as the
in-group ordering when the user drills into a non-series group.
- Smart defaults derived from groupBy, surfaced as "(Auto)" in the menu
and resolved at sort time so user picks are never overwritten:
- groupBy=Author + secondary=none -> Series
- groupBy=Series + librarySortByAuto -> primary becomes Series
- librarySortByAuto flips off as soon as the user makes any explicit
primary pick; subsequent groupBy changes then respect that choice.
Settings: librarySortBy2, librarySortByAuto. URL: ?sort2 syncs the
secondary; auto is settings-only (no URL representation).
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Huang Xin
ce0ab5cc61