When the model dropdown rebuilds (panel switch, provider refresh, or a
live-model fetch that times out and serves a fallback catalog), a
cross-provider selection could vanish from the refreshed catalog and the
browser would snap the <select> back to its first <option> (the default
model). _reconcileModelDropdownSelection now routes each selection branch
through an _applyOrEnsure helper that delegates to
_ensureModelOptionInDropdown, re-injecting the chosen model as a custom
option when it is missing from the rebuilt catalog instead of returning
null. Branch order and per-branch model/provider arguments are unchanged.
Maintainer note: simplified the contributor's helper to delegate straight
to _ensureModelOptionInDropdown (which already applies-first-then-injects),
removing a redundant double scan; re-pointed the
test_populate_model_dropdown_reconciles_selection_after_rebuild string
assertions to the new form (the behavioral node-driver tests for boot-default
precedence and in-page selection preservation are unchanged and still pass).
Co-authored-by: Ed <edou@edoudoux.com>
446cd2cd98
