.navigationTitle set to a real value duplicated the custom toolbar
pill (macOS renders both in the same row); the previous attempt to
suppress just the native text via .windowToolbarStyle(showsTitle:
false) also suppressed the custom .navigation item itself. Empty
title sidesteps both.
Also threads the open document's id down through the sidebar tree so
its row highlights too, not just the containing collection — and
auto-expands whichever collection contains it when the document was
opened from outside the sidebar (detail pane, global search).
Puranjay Savar Mattas
a0643090b3