修改了视图

core/views.py

@@ -292,7 +292,9 @@ def delete_today_plan(request, pk):
 def toggle_today_plan(request, pk):
     """切换今日计划状态"""
     plan = get_object_or_404(TodayPlan, pk=pk)
-    plan.status = 'completed' if plan.status == 'pending' else 'pending'
+    pending_status = Status.objects.get(name='pending')
+    completed_status = Status.objects.get(name='completed')
+    plan.status = completed_status if plan.status == pending_status else pending_status
     plan.save()
     logger.info(f"切换今日计划状态: {plan.content[:20]}... -> {plan.get_status_display()}")