←→ was sliding the whole alert row, so reading a long message to its end cost
the marker, age, kind, glyph and node name off the left edge — the lanes that
say *which* alert this is, and the part that already fitted. Each row now
declares them (`Choice.hscroll_from`, the seam the Trophy case cut), keeping
the `—` with the head so the message still arrives introduced.
The ←→ footer atom is gated on the run rather than the whole label, so a row
whose pinned lanes make it wide but whose message fits no longer advertises a
key that would do nothing.
The section jumps were already there: two `section_heading` rows earn the
list its ^PgUp/^PgDn and their F1/F2 chips automatically.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 5
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