A manual composer pick stays sticky across new chats (intended), but if that
model later disappears from the provider/config, every new chat kept trying the
dead model and 404'd. Fall back to the profile default in that one case only.
refreshCurrentModel now consults the model-options cache the composer already
populates (no extra fetch): a manual pick is preserved unless manualPickRemoved()
proves it's gone — provider present, non-empty catalog, model absent. An
unknown/absent provider, an empty (re-auth/unconfigured) list, or a not-yet-loaded
catalog all preserve the pick, so a still-valid selection is never clobbered.
Brooklyn Nicholson
d5decee5ac