fix update

update

@@ -1,13 +1,12 @@
 #!/bin/bash
 
-# Common function to download and unzip files
+# 下载及解压
 download_and_unzip() {
     url="$1"
     target_dir="$2"
     echo "正在下载 ${url}..."
     curl ${CURL_OPTIONS} "$url" | busybox unzip -d /tmp -
     if [ $? -eq 0 ]; then
-        echo "下载成功"
         if [ -e /tmp/MoviePilot-* ]; then
             mv /tmp/MoviePilot-* /tmp/${target_dir}
         fi
@@ -16,7 +15,7 @@ download_and_unzip() {
     fi
 }
 
-# Common function to install backend and download resources
+# 下载程序资源，$1: 后端版本路径
 install_backend_and_download_resources() {
     download_and_unzip "https://github.com/jxxghp/MoviePilot/archive/refs/${1}" "App"
     if [ $? -eq 0 ]; then
@@ -36,13 +35,22 @@ install_backend_and_download_resources() {
                         download_and_unzip "https://github.com/jxxghp/MoviePilot-Frontend/releases/download/${frontend_version}/dist.zip" "dist"
                         if [ $? -eq 0 ]; then
                             echo "前端程序下载成功"
-                            find /app/* -type d ! -path "/app/app/plugins" -exec rm -rf {} \;
-                            find /app/* -type f ! -path "/app/app/plugins/*" -exec rm -f {} \;
-                            mv -f /tmp/App/* /app/
+                            # 备份插件目录
+                            mv -f /app/app/plugins /plugins
+                            # 清空目录
+                            rm -rf /app
+                            # 后端程序
+                            mv -f /tmp/App /app
+                            # 恢复插件目录
+                            mv -f /plugins /app/app/plugins
+                            # 插件仓库
+                            mv -f /tmp/Plugins/plugins/* /app/app/plugins/
+                            # 资源包
+                            mv -f /tmp/Resources/resources/* /app/app/helper/
+                            # 前端程序
                             rm -rf /public
                             mv /tmp/dist /public
-                            mv -f /tmp/Plugins/plugins/* /app/app/plugins/
-                            mv -f /tmp/Resources/resources/* /app/app/helper/
+                            # 清理临时目录
                             rm -rf /tmp/*
                             echo "程序更新成功，前端版本：${frontend_version}，后端版本：${1}"
                         else