Target is now anchored in a chip at the top instead of a floating line.
Existing shares and the add-user form are split into labeled sections
with states for loading / empty. Each share row gets a hash-tinted
initial avatar and a semantic permission pill (primary = edit, muted =
view). The user picker is full-width with avatars in the dropdown, and
permission becomes a segmented "Can view / Can edit" control alongside
an icon-labeled Share button.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>