* fix(preflight): route landing banner through the runtime-aware preflight slice
Landing called window.api.preflight.check directly, which always probes the
local client. The preflight slice is the only caller that consults
getActiveRuntimeTarget and forwards to preflight.check on the active runtime
environment, so while connected to a remote runtime the landing banner
reported the client machine's git/gh state instead of the server's.
Delegate to refreshPreflightStatus and derive the issue list from
state.preflightStatus. This also drops Landing's duplicate probe: the slice
dedupes concurrent and forced checks, so the mount/focus/poll paths now share
one in-flight request with the rest of the app.
* fix(preflight): refresh landing status across runtime sessions
* test(preflight): cover paired runtime session races
* test: make landing preflight oracle behavioral
* fix(preflight): scope runtime session invalidation
* test(preflight): cover headed runtime switching
* test(preflight): isolate runtime status toast
---------
Co-authored-by: Marty <marty@localhost>
Co-authored-by: OrcaWin <293788423+OrcaWin@users.noreply.github.com>
