From 8b99784c9130c93f3e2cbf10f38bf04b0d784c00 Mon Sep 17 00:00:00 2001
From: Poker Design Developer <developer@poker-design.local>
Date: Wed, 3 Jun 2026 22:16:09 +0800
Subject: [PATCH] feat: initialize back_design when applying template

---
 backend/apps/templates/template_apply.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/backend/apps/templates/template_apply.py b/backend/apps/templates/template_apply.py
index ba74487..636f4ea 100644
--- a/backend/apps/templates/template_apply.py
+++ b/backend/apps/templates/template_apply.py
@@ -69,6 +69,12 @@ def apply_template_to_project(project, template):
     # 背景色
     base_design['background_color'] = template.color_background
     project.design = base_design
+
+    # 2. 初始化背面设计（如果尚未设置）
+    if not project.back_design:
+        from apps.projects.models import default_back_design
+        project.back_design = default_back_design()
+
     project.save()
 
     # 2. 复制主题素材（如果绑定了 theme_id）