Internal links to SEO landing pages (role quick-links on list pages)

The /استخدام/{role}/{city} and /شیفت/{role} landing pages were only reachable via
the sitemap — no internal links, which is weak for ranking. Add a role quick-link
chip strip to the Jobs and Shifts list pages linking to the per-role landing URLs.
Since those list pages ARE the landing pages, this also cross-links every landing
page to all the others, building an internal-link mesh that passes authority and
aids crawl far more than the sitemap alone.

Improvement 2 of the backlog (SEO).

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

src/JobsMedical.Web/Pages/Jobs/Index.cshtml

@@ -18,6 +18,18 @@
 </div>
 
 <div class="container section">
+    @if (Model.Roles.Count > 0)
+    {
+        @* Internal links to the SEO landing pages (/استخدام/{نقش}) — and since this page IS the
+           landing page, every landing page cross-links to all the others. *@
+        <div class="role-links">
+            <span class="rl-label">استخدام بر اساس نقش:</span>
+            @foreach (var r in Model.Roles.Take(14))
+            {
+                <a class="rl-chip" href="/استخدام/@JobsMedical.Web.Services.SeoSlug.Of(r.Name)">@r.Name</a>
+            }
+        </div>
+    }
     <div class="layout-2">
         <aside class="card card-pad filter-card">
             <h3>فیلترها</h3>