Move library collections as a group and map v2 identity refs.

Collapsed collection actions now move, rename, delete, and rerun every part so chains stay together. Identity mode follows the v2u3 Ref2VA picture wiring.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/api/library/clips/[id].delete.ts

@@ -3,6 +3,8 @@ export default defineEventHandler(async (event) => {
   const id = String(getRouterParam(event, 'id') || '')
   const clip = getClip(owner, id)
   assertFolderAccess(event, clip.folderId)
-  await deleteClip(owner, id)
+  const family = ['1', 'true'].includes(String(getQuery(event).family || '').toLowerCase())
+  if (family) await deleteClipFamily(owner, id)
+  else await deleteClip(owner, id)
   return { ok: true }
 })