fix: correct condition to check for oh-my-zsh installation before miniconda installation

configure_user.sh

@@ -75,7 +75,7 @@ configure_miniconda() {
     fi
 
     if confirm_action "要安装 miniconda 吗？" "N"; then
-        if [ -d ~/.oh-my-zsh ] && ! confirm_action "检测到未安装 oh-my-zsh，推荐稍后安装。是否继续安装 miniconda？" "N"; then
+        if [ ! -d ~/.oh-my-zsh ] && ! confirm_action "检测到未安装 oh-my-zsh，推荐稍后安装。是否继续安装 miniconda？" "N"; then
             return
         fi
         wget "https://repo.anaconda.com/miniconda/$INSTALLER" -O "$tempdir/miniconda.sh"