Toggle rows between friendly display names and raw model specs.
Mirrors the /theme picker's label/key toggle: pressing Ctrl+N flips
every visible row between its human-readable name (e.g.
Claude Sonnet 5) and the canonical provider:model spec (e.g.
anthropic:claude-sonnet-5) so the user can read or copy the exact id
without leaving the picker. Relabels the mounted rows in place — the
toggle changes neither ordering nor selection, so a full rebuild is
unnecessary — and stays available in curated/onboarding mode since it
only affects presentation.
In standard mode the footer hint is rewritten so it advertises the mode the next press switches to; curated mode omits the hint entirely, so the refresh is a no-op there.
The refresh is skipped while a Ctrl+S error notice is on the footer,
since that notice is the only signal a save failed and the user may not
have read it yet. Successful Ctrl+S messages are clobbered freely, and
their pending restore timer is stopped rather than left to fire: the
refresh already rendered the hint this timer would render, and an
untracked timer is one _fail could not cancel.
