Notepad
The @orgdevkit/kit-notepad two-pane notepad — a recursively nested folder/note tree beside a block editor with anchored marginalia and an optional selection-routing dock — over synthetic fixtures.
Two ways to hold it
Full page is the route: it pins itself to the viewport and is the page. Summoned is the one mounted globally behind the quick menu and the N key — no header button, because Capture is the only ink button a page header may hold. The two cannot be shown at once for the same reason a product only mounts one.
Shut.