feat: select text across bullets and delete it like a text editor; Ctrl+Z in tasks; notes and lists without emoji; custom done columns complete tasks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/storage/thoughts.go

@@ -238,7 +238,7 @@ func (s *Store) ReorderTasks(taskListID string, items []domain.ThoughtReorderIte
 	for _, it := range items {
 		if it.KanbanStatus != nil && *it.KanbanStatus != "" {
 			isCompleted := 0
-			if *it.KanbanStatus == "done" {
+			if isDoneColumn(tx, it.ID, *it.KanbanStatus) {
 				isCompleted = 1
 				var was int
 				_ = tx.QueryRow(`SELECT is_completed FROM thoughts WHERE id = ?`, it.ID).Scan(&was)
@@ -275,6 +275,24 @@ func (s *Store) ReorderTasks(taskListID string, items []domain.ThoughtReorderIte
 	return nil
 }
 
+// isDoneColumn: whether a Kanban column completes the task: the column of the task's list marked as done
+// (its ID may be anything), else the default ID "done".
+func isDoneColumn(q interface {
+	QueryRow(query string, args ...any) *sql.Row
+}, taskID, column string) bool {
+	var raw string
+	_ = q.QueryRow(`SELECT COALESCE(tl.columns, '') FROM thoughts t LEFT JOIN task_lists tl ON tl.id = t.task_list_id WHERE t.id = ?`, taskID).Scan(&raw)
+	var cols []domain.KanbanColumn
+	if raw != "" && json.Unmarshal([]byte(raw), &cols) == nil && len(cols) > 0 {
+		for _, c := range cols {
+			if c.ID == column {
+				return c.IsDone
+			}
+		}
+	}
+	return column == "done"
+}
+
 // UpdateThoughtTriage handles swipe left (discard), swipe right (keep), restore, and conversion to task/document/list_item
 func (s *Store) UpdateThoughtTriage(userID, thoughtID, action, convertTo, targetListID, dueDate, taskListID string) (*domain.Thought, error) {
 	thought, err := s.GetThoughtByID(userID, thoughtID)