Match Nablus workshop form's background/card styling to the rest of the site

Reused existing, already-compiled design-system pieces instead of ad hoc
inline colors: the login page's auth-pattern background (public/images/
auth-pattern.svg) on the standalone layout, and the reusable <x-ui.card
highlight> component (Warm Gold accent border) for the form card. Replaced
inline style="color: #2D322A" with the text-body token.

Also fixes the actual root cause behind "the picture still looks the same"
from the prior two tasks: public/build's compiled CSS was stale (last built
Jan 17, before this session), so max-h-40/max-h-64 were never in the
generated stylesheet. Rebuilt via npm run build and verified the new classes
compile; production has its own deploy-time build so this shouldn't recur
there.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

resources/views/components/layouts/standalone.blade.php

@@ -3,9 +3,9 @@
     <head>
         @include('partials.head')
     </head>
-    <body class="min-h-screen bg-[#F4F1EA]" style="font-family: var(--font-arabic)">
-        <main class="min-h-screen flex flex-col items-center px-4 py-10 sm:py-16">
-            <div class="w-full max-w-[640px]">
+    <body class="min-h-screen bg-background antialiased" style="font-family: var(--font-arabic)">
+        <main class="auth-pattern relative min-h-screen flex flex-col items-center px-4 py-10 sm:py-16">
+            <div class="relative w-full max-w-[640px] z-10">
                 {{ $slot }}
             </div>
         </main>