Wizard: explicit step error propagation, honest final diagnosis

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

bin/omarchy-cn-setup

@@ -81,12 +81,13 @@ step_dev_mirror() {
 }
 
 step_apps() {
-  local catalog picks app
-  catalog=$(omarchy-cn-app-list | tail -n +2 | awk '{print $1}')
+  local catalog picks app rc=0
+  catalog=$(omarchy-cn-app-list | tail -n +2 | awk '{print $1}') || return 1
   picks=$(gum choose --no-limit --header "选择要安装的国内应用（空格多选，回车确认）" <<<"$catalog" || true)
   for app in $picks; do
-    omarchy-cn-app-install "$app"
+    omarchy-cn-app-install "$app" || rc=1
   done
+  return $rc
 }
 
 step_privacy() {
@@ -111,5 +112,9 @@ run_step privacy "隐私与诊断" step_privacy
 
 echo
 echo "==> 最终检查"
-omarchy-cn-doctor all || true
+if omarchy-cn-doctor all; then
   echo "OmarchyCN 初始化完成。随时可用 omarchycn setup 重进任一步骤。"
+else
+  echo "初始化步骤已执行，但诊断存在失败项（见上），修复后可重跑 omarchycn setup" >&2
+  exit 1
+fi