Fix PWA: back/X buttons untappable in wizard layout (budget edit) (#1076)

The wizard layout header lacked safe-area-inset-top padding, causing
the back arrow and X button to sit under the system status bar in PWA
standalone mode. All other layouts already account for this.

Co-authored-by: Claude <noreply@anthropic.com>

app/views/layouts/wizard.html.erb

@@ -1,5 +1,5 @@
 <%= render "layouts/shared/htmldoc" do %>
-  <div class="bg-surface flex flex-col h-full">
+  <div class="bg-surface flex flex-col h-full pt-[env(safe-area-inset-top)]">
     <header class="flex items-center justify-between p-8">
       <% if content_for?(:prev_nav) %>
         <%= yield :prev_nav %>