Claude Desktop: no session-scoped model override, and floor-reset notifications are noisy/token-costly

Model floor has no session-scoped option in Claude Desktop. Any model switch persists as the default for all future sessions across every project — there's no equivalent to the CLI's transient /model behavior (a scoped switch there only affects the current session; only a bare /model persists). This forces manual governance just to track and revert drift — we've had to maintain multiple internal decision-log entries purely to manage floor state across projects.

Separately: the in-app notifications that fire on floor-related state changes are noisy and appear to consume tokens themselves, adding cost on top of the original problem.

Requests:

1. A session-scoped model override for Desktop, matching CLI's transient /model behavior.
2. A lighter-weight (or token-free) way to surface floor-state changes.