Harden UX & accessibility (ui-ux-pro-max pass)

Audited the site with the ui-ux-pro-max skill. It validated the brand blue
(#2563EB == its SaaS primary) but flagged real high-severity gaps:

- Contrast: muted grays were zinc-400 (~2.8:1, fails WCAG AA). Bumped the
  muted token + all text-zinc-400 to zinc-500 (#71717a, ~4.6:1).
- Touch targets: social buttons 38px -> 44x44 (meets 44pt minimum).
- Cursor + disabled: cursor-pointer on buttons; disabled state dims + blocks.
- Form a11y: required-field asterisks (name/service/budget/message),
  autocomplete on name/company, and role=status aria-live=polite on the
  submit status so screen readers announce success/error.

Kept Syne + system fonts and the blue accent (skill suggested Inter + an
AI-purple palette its own anti-patterns reject). Rebuilt Tailwind bundles.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Pages/Blog/Index.cshtml

@@ -20,7 +20,7 @@
         <a href="/blog/@post.Slug" class="group reveal grid grid-cols-1 gap-2 border-t border-zinc-200 py-6 sm:grid-cols-[8rem_1fr] sm:gap-8">
           <div class="flex items-baseline justify-between sm:flex-col sm:gap-1">
             <span class="kicker">@post.Category</span>
-            <span class="text-[.78rem] text-zinc-400">@post.ReadTime @(fa ? "دقیقه" : "min")</span>
+            <span class="text-[.78rem] text-zinc-500">@post.ReadTime @(fa ? "دقیقه" : "min")</span>
           </div>
           <div>
             <h2 class="text-[1.1rem] font-semibold transition-colors group-hover:text-accent @(fa ? "font-fa" : "")">@post.Title</h2>