Rework MemoDetailSidebar into a Linear-style rail: a quiet icon action
cluster (pin, copy link, share image, share links) followed by
label/value property rows for visibility, created/edited times, author,
and location, then hairline-separated sections for tags, attachments,
relations, and the outline. Attachments and reference relations were
previously not surfaced in the sidebar at all.
- Visibility is editable in place, reusing VisibilitySelector with a
new compact size variant that matches the 13px row grammar
- Pin toggle and visibility changes go through useUpdateMemo
- MemoOutline gains active-section tracking (scroll-spy), depth
indentation, and tick-rail styling; drops the animated underline
and native title tooltips
- Widen the detail rail from w-56 to w-60
d4b5a1695b