The sidebar now presents pages as a collapsible tree built from parentId
(folder view) or grouped under the hierarchical label tree (label view,
read-only; multi-label pages appear under each label, untagged ones in
an 'unlabeled' group). The pond owner sets the default via a new
sidebarView pond setting (PATCH-merged like the other keys); every user
can override it locally (ui.sidebar.view.<pondId>), and the toggle sits
above the page list. Collapse state persists per pond.
New pages created while a page is open become its children — the inline
form says so and sends parentId. Reordering (buttons and drag-between)
now operates within one sibling group; the label filter stays a
folder-view feature and falls back to the flat list while active, so
the filtered order is never mistaken for a partial tree.
SidebarContent is keyed by pond id so the per-pond localStorage hooks
mount with the right key. e2e hooks (.sidebar__pages, .sidebar__page,
reorder buttons) kept; reorder/labels/content packs green locally, plus
a live smoke of nesting, collapse persistence, and both views.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
