feat(modules): 添加 zsh 默认 shell 自动设置

modules/zsh/module.yaml

@@ -3,3 +3,5 @@ description: Zsh 及插件
 dotfiles:
   - source: dotfiles/.zshrc
     target: ~/.zshrc
+post_install_hook: scripts/set-default-shell.sh
+hook_behavior: once

scripts/set-default-shell.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -euo pipefail
+
+if [ "$SHELL" != "$(which zsh)" ]; then
+    echo "==> 设置默认 shell 为 zsh..."
+    sudo chsh -s "$(which zsh)" "$USER"
+    echo "✓ 默认 shell 已设置为 zsh（重新登录后生效）"
+else
+    echo "默认 shell 已经是 zsh"
+fi