Two findings from review of this branch.
Awaiting the open instead of dismissing up front bought a window: on Linux
it is at least OPENER_GRACE, doubled when xdg-open fails and gio is tried.
If the container relays a second URL inside that window, the first open's
resolution blanked the second prompt -- losing a link that exists only in
the container's transcript, which is the failure "dismiss on success only"
was made to prevent. The slot already carried a `seq` for exactly this
reason; dismissal is now conditional on it.
`urlPromptRef` is written eagerly by the two functions that change the slot
rather than synced by an effect. That is load-bearing: an effect-synced
mirror lags state by a commit, and a promise microtask can resolve between
`setUrlPrompt` and React flushing passive effects -- so it answers "did a
newer prompt land?" wrong in precisely the window the guard exists for.
Dropping the functional updater also fixes `promptSeqRef.current += 1`
being mutated inside a state updater React is free to invoke twice.
The guard is a sibling function rather than an optional argument on
`dismissUrlPrompt`, because that function is passed by reference as
UrlToast's `onDismiss` and React would hand it a MouseEvent as its first
argument -- the seq check would fail and the close button would silently
stop working, with the types still assignable.
Separately, the sign-in hint was binary on which button leads, but "host
leads" covers both a live bridge and a fallback where nothing is set up to
catch the callback at all. In the second case the toast promised the bridge
would carry it and the login hung to its timeout. The target is now
three-state, the hint tells the truth in the fallback case and names the
control that fixes it, and the hook starts at `host-fallback` rather than
assuming a bridge it has not confirmed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
shadowdaoandClaude Opus 5
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