fix(alarms): Kanban moves no longer re-arm due alarms of open tasks

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

internal/storage/thoughts.go

@@ -243,10 +243,13 @@ func (s *Store) ReorderTasks(taskListID string, items []domain.ThoughtReorderIte
 					completed = append(completed, it.ID)
 				}
 			}
+			// Only a reopened task (done -> open) gets its due alarm again. A Kanban move sends every task
+			// of the touched columns, so resetting all open ones re-sent "due today" for each of them.
+			// (is_completed in the CASE is still the value before this UPDATE.)
 			_, err = tx.Exec(
 				`UPDATE thoughts SET sort_order = ?, kanban_status = ?, is_completed = ?,
-				 alarm_sent = CASE WHEN ? = 0 THEN 0 ELSE alarm_sent END,
-				 alarm_failures = CASE WHEN ? = 0 THEN 0 ELSE alarm_failures END WHERE id = ?`,
+				 alarm_sent = CASE WHEN ? = 0 AND is_completed = 1 THEN 0 ELSE alarm_sent END,
+				 alarm_failures = CASE WHEN ? = 0 AND is_completed = 1 THEN 0 ELSE alarm_failures END WHERE id = ?`,
 				it.SortOrder, *it.KanbanStatus, isCompleted, isCompleted, isCompleted, it.ID,
 			)
 		} else {