Announce a finished transcript in the meeting pill - #9

The daemon fired an osascript display notification when a recorded session finished transcribing, which lands in Notification Center attributed to Script Editor and gives you nowhere to click.

This reuses the pill the meeting prompt already draws — same PromptPanel, same placement under the menu bar, plus a Glass chime and one Open button that reveals transcript.md in Finder. No Dismiss: an announcement has nothing to decline, so it leaves on its own after six seconds.

No new file, no new class, no new dependency. PromptPanel gains a toast: Bool that drops the Dismiss button and swaps the 120 s prompt lifetime for 6 s; the coordinator gains one injectable handler mirroring setStatusHandler.

Collision rules

Both live top-centre, so:

• a toast arriving while a prompt is up falls back to the notification — a question must not be covered by an announcement, and the announcement still reaches the user;
• a prompt arriving evicts a live toast.

What deliberately did not change

• One-shot yap record sets no handler and keeps the notification: it is a ParsableCommand with no AppKit run loop.
• The failure branch stays on notifyUser — a failure should persist in Notification Center, not vanish in six seconds.

Verification

On an M4, against the resume path (delete transcript.json/.md from a session, relaunch the daemon, it re-transcribes at startup):

• pill appears top-centre with the chime and fades by itself;
• accessibility query of the toast window reports exactly one button, [Open], at 790,56 — confirming the Dismiss button is omitted and the panel sits under the menu bar;
• clicking it left Finder selecting document file "transcript.md" of folder "2026.07.31-1216" — the right file in the right session;
• one-shot yap record --out /tmp/… still transcribes and notifies, no pill;
• NSSound(named: "Glass")?.play() as a temporary was checked rather than assumed: a weak reference to it stays alive with isPlaying == true after the only local reference dies, so AppKit retains it for the duration and no stored property is needed.

No audio or transcription path touched, so the benchmark table is unaffected.

Full local CI gate green before pushing: swift test, swift build -c release --arch arm64, the three smoke subcommands, and the embedded __info_plist check.