fix: set zsh as default shell when init it

script/zsh-init.sh

@@ -14,13 +14,26 @@ ln -sf "$ZSHRC_REPO" "$ZSHRC_HOME"
 echo "  $ZSHRC_HOME -> $ZSHRC_REPO"
 
 if [[ ! -d "$HOME/.oh-my-zsh" ]]; then
-  echo "安装 Oh My Zsh（--unattended：不改默认 shell、不自动进 zsh；--keep-zshrc：保留已链接的 .zshrc）…"
+  echo "安装 Oh My Zsh（--unattended：安装脚本内不改 shell、不自动进 zsh；--keep-zshrc：保留已链接的 .zshrc）…"
   sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended --keep-zshrc
 else
   echo "Oh My Zsh 已存在，跳过安装 (~/.oh-my-zsh)"
 fi
 
 echo ""
-echo "完成。当前仓库的 .zshrc 已启用 z 插件（Oh My Zsh plugins/z）。"
-echo "未修改默认登录 shell；若需临时使用: zsh"
-echo "本机额外配置可写入 ~/.zshrc.local（不会被链接覆盖）。"
+echo "将默认登录 shell 设为 zsh"
+zshpath="$(command -v zsh)"
+if [[ -z "$zshpath" || ! -x "$zshpath" ]]; then
+  echo "错误: 找不到可执行的 zsh，请先安装 zsh。" >&2
+  exit 1
+fi
+if grep -qxF "$zshpath" /etc/shells 2>/dev/null; then
+  echo "  $zshpath 已在 /etc/shells 中"
+else
+  echo "$zshpath" | sudo tee -a /etc/shells
+fi
+chsh -s "$zshpath"
+
+echo ""
+echo "完成。当前仓库的 .zshrc 已启用 z 插件（Oh My Zsh plugins/z），默认 shell 已改为: $zshpath"
+echo "请重新登录或新开终端后生效。本机额外配置可写入 ~/.zshrc.local（不会被链接覆盖）。"