shouldLatchBackendStartFailure deliberately never latches a remote failure:
remote faults are usually transient and must stay retryable without an app
restart. A confirmed reauth rejection is the exception — it cannot self-heal,
because nothing changes until the user signs in again.
Worse, not latching actively prevents the recovery it was protecting. A
non-latching remote boot failure re-runs startHermes on every
getConnection/api call, re-emits running: true, and the boot-failure overlay
(visible = Boolean(boot.error) && !boot.running) hides itself — so the
"Sign in" button flickers out from under the user before it can be clicked.
Add shouldLatchRemoteReauthFailure as a separate predicate rather than
changing the existing one, so transient remote failures keep self-healing.
The two latches are complementary and never fire for the same failure.