- Backend: ListWorkspaceTree/ListWorkspaceChildren filter to container types
only (case, client, project, folder, document, recipe)
- TreeNode: full-row context menu (removed label stopPropagation),
double-click toggles expand, icon-click toggles expand, DnD auto-expand
on 500ms hover, auto-scroll near edges, drag-over highlight via classList
- App.svelte: toggleExpand uses ListWorkspaceChildren, submitCreateNode uses
ListWorkspaceChildren for child tree population
- Note/file nodes no longer appear in the sidebar workspace tree