Wire claude-opus-4-8 (+ [1m] variant) through the team model picker
alongside 4.7 and 4.6, point the opus alias label at 4.8, update the
reasoning/long-context predicates, and switch the fast-mode UI
message to mention 4.8.
- Treat checking, deferred and loading provider model catalog states as pending instead of unavailable.
- Show selected provider activity inside create and launch dialogs while keeping ready providers visible during checks.
- Remove the global provider status header so provider activity is scoped to launch flows.
