Three defects in one class, backend + renderer:
- _lap_bare_custom_row only built the bare `model.provider: custom` row
while the session was ON it; switching away made it vanish and the
unconfigured-canonical fallback substituted a 0-model placeholder
(#59702). Recover the endpoint from the config.yaml `model:` block when
the caller's current-provider slice points elsewhere; is_current is then
true only when that slice points back at the URL, and the live probe
stays gated on refresh / probe-current.
- The Desktop Settings model page kept the previous provider's model
selected after a provider switch (withActive() painted it as still
selectable, and Apply would pin the new provider to the old model),
and a named custom_providers entry the user just switched to showed 0
models because the normal non-refresh options load probes only the
CURRENT custom provider (#59063). A user-driven switch now clears the
model and fires one refresh-scoped options fetch for an empty
configured endpoint.
- groupModels derived model families solely from the provider catalog;
an OpenRouter current model the catalog omits left the picker with no
active-model row (#57534). Prepend the current model when the catalog
lacks it.
Tests: red on base for the bare-custom regression, the settings switch,
and the missing-current-model row; green with the fix.
39a01d069d