feat: Persist closed state per card

server/api/helpers/boards/import-from-trello.js

@@ -67,6 +67,7 @@ module.exports = {
           name: trelloCard.name,
           description: trelloCard.desc || null,
           dueDate: trelloCard.due,
+          isClosed: trelloCard.dueComplete,
           listChangedAt: new Date().toISOString(),
         };