Onboarding · Flows and highlights: focus that holds as the flow turns, a tip that closes

navigation::Wizard keeps one focus handle for Next and Finish, so a
second press on the step before last finishes; Back that reaches the
first step, and a finished step picked by key, hand focus to Next.
Popover::with_opener hands its content a close that gives focus back:
Got it closes the hotspot's tip before the owner hides it, and the
event details close before Edit and Delete run, so focus never lands
on a panel that left the tree. The wizard's count and the setup
checklist's tally name their selectors after their words, and the bar
takes the count's own value.

AGENTS.md

@@ -77,8 +77,8 @@ Ely GPUI Component. A component library for GPUI, in light and dark.
 - gpui clicks a focused element when Enter or Space is released. An overlay that hands focus back picks on release too; a pick on press returns focus first, and the release clicks the opener again. An edit in place that hands focus back keeps its text on Enter's release (`forms::InlineEdit`). The press itself bubbles, so a container that takes Space leaves a focused button its own: `overlays::media_button` stops it, and a button in a `SelectableList` row stops Space and Enter at its box (`mail::MailItem`'s star, `messaging::PinnedMessages`' Unpin).
 - A focus handle a component hands back lives across all its modes: take it with `tab_stop` before any early return, or keyed state drops it while the other mode draws and the handed-back focus lands nowhere. A thread's message keeps one handle folded and open, a Tab stop only while folded (`mail::MailThreadView`).
 - A button whose words and action change with a mode keeps one handle through `Button::focus_handle`, and the component moves focus to it or back to its field as the mode turns (`project::TimeTracker`).
-- A panel that opens from something other than a button goes through `overlays::Popover::with_opener`, which hands the opener its toggle; focus, placement and every way out stay in the popover (`calendar::EventPopover`'s chip).
-- A flow in steps goes through `navigation::Wizard`: Back, Next, Finish and the step's motion live there. `onboarding::OnboardingWizard` leaves out its numbered steps (`headless`) and shows a count over a bar in as many parts.
+- A panel that opens from something other than a button goes through `overlays::Popover::with_opener`, which hands the opener its toggle; focus, placement and every way out stay in the popover (`calendar::EventPopover`'s chip). Its content gets a close that hands focus back: a press that ends the panel's work closes it before the owner acts, or a panel whose host leaves the tree strands focus (`onboarding::Hotspot`'s Got it, EventPopover's Edit and Delete).
+- A flow in steps goes through `navigation::Wizard`: Back, Next, Finish and the step's motion live there. Next and Finish share one focus handle, and focus moves to it when Back reaches the first step or a finished step is picked. `onboarding::OnboardingWizard` leaves out its numbered steps (`headless`) and shows a count over a bar in as many parts.
 - A dialog goes through `overlays::Dialog`: scrim, focus trap, Escape and focus return live there. Its close runs on every way out, so a dialog with two answers marks the chosen one before it closes (`messaging::IncomingCallDialog`). AlertDialog, ConfirmDialog and PromptDialog build on it; a fullscreen dialog fills the window below its title bar. A dialog's card fits the window, a title bar's height clear at each end; its body scrolls and its actions stay.
 - Controls on a dark layer over pictures are `overlays::media_button`, light icons that dim when they have nowhere to go, for the lightbox and a video player's bar alike.
 - A component's letter keys step aside while Command or Control is held, so the app's shortcuts reach the app (`media::ImageAnnotator`, `VideoPlayer`, `VideoThumbnailStrip`).