feat: 添加内容创建表单状态字段，优化内容保存和发布逻辑

backend/app/services/creator.go

@@ -201,6 +201,10 @@ func (s *creator) CreateContent(ctx context.Context, userID int64, form *creator
 	uid := userID
 
 	return models.Q.Transaction(func(tx *models.Query) error {
+		status := consts.ContentStatusPublished
+		if form.Status != "" {
+			status = consts.ContentStatus(form.Status)
+		}
 		// 1. Create Content
 		content := &models.Content{
 			TenantID: tid,
@@ -208,7 +212,7 @@ func (s *creator) CreateContent(ctx context.Context, userID int64, form *creator
 			Title:    form.Title,
 			Genre:    form.Genre,
 			Key:      form.Key,
-			Status:   consts.ContentStatusPublished,
+			Status:   status,
 		}
 		if err := tx.Content.WithContext(ctx).Create(content); err != nil {
 			return err