Improve .gitignore management in build-to-branch workflow

Refactor .gitignore handling in build workflow

Author: xc2f

.github/workflows/build-to-branch.yml

@@ -64,6 +64,9 @@ jobs:
           git config user.name "github-actions"
           git config user.email "github-actions@github.com"
 
+          # 保存 .gitignore
+          cp .gitignore /tmp/gitignore.tmp
+
           # 切换或创建 build 分支
           git checkout -B build
 
@@ -78,9 +81,7 @@ jobs:
           # cp package.json next.config.js .
 
           # copy .gitignore
-          git reset .gitignore
-          git checkout -- .gitignore
-          cp .gitignore .
+          cp /tmp/gitignore.tmp .gitignore
 
           git add .
           git commit -m "chore: build from $GITHUB_SHA"