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@@ -91,21 +91,21 @@ else\n\
     # 设置GitHub API URL\n\
     GITHUB_API="https://api.github.com/repos/$GITHUB_REPO"\n\
     \n\
-    # 获取最近30天的备份文件\n\
-    THIRTY_DAYS_AGO=\$(date -d \"30 days ago\" +%Y-%m-%d)\n\
+    # 获取最近30天的备份文件
+    THIRTY_DAYS_AGO=\$\(date -d \"30 days ago\" +%Y-%m-%d\)\n\
     \n\
     echo "查找 $THIRTY_DAYS_AGO 之后的备份文件..."\n\
     \n\
-    # 获取备份文件列表\n\
-    BACKUP_RESPONSE=\$(curl -s -H \"Authorization: token \$GITHUB_TOKEN\" \"\$GITHUB_API/contents/backups\")\n\
+    # 获取备份文件列表
+    BACKUP_RESPONSE=\$\(curl -s -H \"Authorization: token \$GITHUB_TOKEN\" \"\$GITHUB_API/contents/backups\"\)\n\
     \n\
     # 检查API响应是否有效\n\
     if echo \"\$BACKUP_RESPONSE\" | jq -e . >/dev/null 2>&1; then\n\
         # 检查是否是数组\n\
         if echo \"\$BACKUP_RESPONSE\" | jq -e 'type == \"array\"' >/dev/null 2>&1; then\n\
-            BACKUP_FILES=\$(echo \"\$BACKUP_RESPONSE\" | jq -r \".[] | select(.name | test(\\\"backup-[0-9]{4}-[0-9]{2}-[0-9]{2}\\\")) | .name\" | sort -r)\n\
+            BACKUP_FILES=\$\(echo \"\$BACKUP_RESPONSE\" | jq -r \".[] | select(.name | test(\\\"backup-[0-9]{4}-[0-9]{2}-[0-9]{2}\\\")) | .name\" | sort -r\)\n\
         else\n\
-            echo \"GitHub API返回错误: \$(echo \"\$BACKUP_RESPONSE\" | jq -r '.message // \"未知错误\"')\"\n\
+            echo \"GitHub API返回错误: \$\(echo \"\$BACKUP_RESPONSE\" | jq -r '.message // \"未知错误\"'\)\"\n\
             BACKUP_FILES=\"\"\n\
         fi\n\
     else\n\
@@ -117,12 +117,11 @@ else\n\
         echo \"未找到备份文件\"\n\
     else\n\
         # 获取最新的备份文件\n\
-        LATEST_BACKUP=\$(echo \"\$BACKUP_FILES\" | head -n 1)\n\
+        LATEST_BACKUP=\$\(echo \"\$BACKUP_FILES\" | head -n 1\)\n\
         echo \"找到最新备份: \$LATEST_BACKUP\"\n\
         \n\
         # 下载并解压备份\n\
-        DOWNLOAD_URL=\$(curl -s -H \"Authorization: token \$GITHUB_TOKEN\" \\\n\
-            \"\$GITHUB_API/contents/backups/\$LATEST_BACKUP\" | jq -r \".download_url\")\n\
+        DOWNLOAD_URL=\$\(curl -s -H \"Authorization: token \$GITHUB_TOKEN\" \\\n\            \"\$GITHUB_API/contents/backups/\$LATEST_BACKUP\" | jq -r \".download_url\"\)\n\
         \n\
         if [ \"\$DOWNLOAD_URL\" != \"null\" ]; then\n\
             echo \"下载备份文件...\"\n\