Drop the fullscreen panel's whole-box no-drag: it swallowed the strips'
blank-run window drag and made no-drag the steady state, turning the
open/close app-region nudge into a computed-value no-op (electron#32341)
exactly when a hidden panel opens straight into fullscreen. The panel now
declares no steady-state app-region in either presentation, and ui-dockkit
subtracts the one box base.css never matches — the plain-div split divider —
alongside tabs, strip-end chrome, and pane bodies. New specs pin both
contracts against the stylesheets on disk.
hiddenInset titlebar with traffic lights over a vibrancy sidebar, darwin-only
via data-platform set by the desktop preload: transparent chain to the window
material, native-theme sync from the app theme source, sidebar top strip +
full hide when collapsed with reopen controls in the new
conversation.session.header.leading slot, title-row drag regions, and
fullscreen right-sidebar traffic-light clearance via the dockkit strip inset.
Seed sidebar default pages lazily on expansion, scope page-tab dedupe
to the target pane, let a sole tab split its own pane with a factory
backfill, close menus when focus enters a sandboxed iframe, and pin the
code preview copy banner while unifying its background with the pane.
- Split toggle aria-labels from their tooltips: the sidebar expand/collapse
buttons announce "Open/Collapse right sidebar" so the two sidebars stay
distinguishable, and the wrap toggle keeps an invariant "Line wrap" name
beside aria-pressed while the tooltip keeps the action wording.
- A hidden tab close also takes no pointer events, so a touch press on the
chip's trailing edge activates the tab instead of closing it; e2e closes
hover the chip first, the way a reader would.
- Closing the last docked tab in fullscreen hands the mode back to push, so
the next expand does not give the whole window to the start page.
- The drop scrim mixes from bg-base, not bg-layer-2, which dark mode binds
to a lighter bluish step than the column beneath it.
- Document the menuitem probe in TabMenuExtras and the strip fade's known
gap; match the open-in-app split-button comment to the 28px control row.
Chip capsules with scroll fades and live titles, drop-zone hint cards, the
canCloseTab control policy with the quiet lone chip and self-dismissing empty
menu, and a room reading that stays independent of hidden split controls.
Yif