Refactor build process with rsync for efficiency

Author: xc2f

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

@@ -66,9 +66,7 @@ jobs:
           git config user.email "github-actions@github.com"
 
           # 拷贝 .next 但排除 cache
-          # rsync -av --exclude='cache' .next/ /tmp/next-build
-          rm -rf .next/cache
-          cp -r .next /tmp/next-build
+          rsync -av --exclude='cache' .next/ /tmp/next-build/
 
           # 切换或创建 build 分支
           git checkout -B build
@@ -77,7 +75,7 @@ jobs:
           git rm -rf .
 
           # 把 build 产物拷进去（按需修改）
-          cp -r /tmp/next-build .next
+          rsync -av /tmp/next-build/ .next/
 
           git add .next
           git commit -m "chore: build from $GITHUB_SHA"