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.
A file whose stat and first page both fail — outside the workspace, gone —
showed the same line twice: the metadata bar above an identical centred body
failure. The bar now stands only over pages already loaded, and the centred
retry runs the full reload so one press clears both halves.
- 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.
imccyu