The selected provider on the Providers settings page shared a field with
the chat's model resolution. Changing the chat model or agent, and
`loadAgents` reconciling a selection, all wrote to it, so the page jumped
to an unrelated provider while the user was reading or editing one.
Only the sidebar click writes it now. A refresh no longer re-derives it
either: a provider missing from a refreshed list is expected while
OpenCode restarts and plugin-registered providers re-register.
Bohdan Triapitsyn
887127b5d0