fix: improve shell compatibility and process cleanup

Preserve literal paths and arguments, use portable command options, validate startup configuration, and retain scripts when downloads fail.

Ensure task watchdogs and process groups are cleaned up across Bash versions, with compatibility and process lifecycle regression coverage.

shell/pub.sh

@@ -1,4 +1,12 @@
 #!/usr/bin/env bash
+
+# BSD grep accepts \d as a digit; GNU grep treats it as a literal d.
+string=$(awk '$1 == "version:" { print $2; exit }' version.yaml) || exit 1
+if [[ ! $string =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[[:alnum:].-]+)?(\+[[:alnum:].-]+)?$ ]]; then
+  printf 'Invalid release version: %s\n' "$string" >&2
+  exit 1
+fi
+version="v$string"
 echo -e "开始发布"
 
 echo -e "切换master分支"
@@ -9,8 +17,6 @@ git push --set-upstream origin master -f
 echo -e "更新cdn文件"
 ts-node-transpile-only sample/tool.ts
 
-string=$(cat version.yaml | grep "version" | egrep "[^ ]*" -o | egrep "\d\.*")
-version="v$string"
 echo -e "当前版本$version"
 
 echo -e "删除已经存在的本地tag"