修复createPlan逻辑错误

internal/infra/repository/plan_repository.go

@@ -137,10 +137,10 @@ func (r *gormPlanRepository) CreatePlan(plan *models.Plan) error {
 		if plan.ContentType == models.PlanContentTypeSubPlans {
 			childIDsToValidate := make(map[uint]bool)
 			for _, subPlanLink := range plan.SubPlans {
-				if subPlanLink.ChildPlan == nil || subPlanLink.ChildPlan.ID == 0 {
+				if subPlanLink.ChildPlanID == 0 {
 					return ErrSubPlanIDIsZeroOnCreate
 				}
-				childIDsToValidate[subPlanLink.ChildPlan.ID] = true
+				childIDsToValidate[subPlanLink.ChildPlanID] = true
 			}
 
 			var ids []uint

internal/infra/repository/plan_repository_test.go

@@ -1134,7 +1134,7 @@ func TestPlanRepository_Create(t *testing.T) {
 				Name:        "父计划",
 				ContentType: models.PlanContentTypeSubPlans,
 				SubPlans: []models.SubPlan{
-					{ChildPlanID: 1, ExecutionOrder: 1, ChildPlan: &models.Plan{Model: gorm.Model{ID: 1}}}, // 关联已存在的子计划1
+					{ChildPlanID: 1, ExecutionOrder: 1},                                                    // 关联已存在的子计划1
 					{ChildPlanID: 2, ExecutionOrder: 2, ChildPlan: &models.Plan{Model: gorm.Model{ID: 2}}}, // 关联已存在的子计划2
 				},
 			},