Move recommendations to a dedicated page + consolidate preferences there

The personalized «پیشنهادهای ویژه شما» feed lived on the homepage and its settings on a separate
/Preferences page. New /Recommendations page combines both — the recommendation cards plus the
preference controls (role/city/shift-type/pay/gender) that drive them, so the settings sit next to
their result. Saving prefs reloads the feed in place.

- Homepage: recommendation section replaced with a CTA card linking to /Recommendations; the model
  no longer loads recommendations.
- Nav: «✨ پیشنهادها» entry added.
- /Preferences now redirects to /Recommendations (old links/bookmarks keep working).
- Page is NoIndex (personalized to the visitor).

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

src/JobsMedical.Web/Pages/Shared/_Layout.cshtml

@@ -111,6 +111,7 @@
             <div class="nav-collapse">
                 <nav class="main-nav">
                     <a asp-page="/Index" class="@(path == "/" ? "active" : null)">خانه</a>
+                    <a asp-page="/Recommendations/Index" class="@(path.StartsWith("/Recommendations") ? "active" : null)">✨ پیشنهادها</a>
                     <a href="/Shifts" data-tour="shifts" class="@(path.StartsWith("/Shifts") ? "active" : null)">شیفت‌ها</a>
                     <a href="/Jobs" data-tour="jobs" class="@(path.StartsWith("/Jobs") ? "active" : null)">استخدام</a>
                     <a asp-page="/Talent/Index" class="@(path.StartsWith("/Talent") ? "active" : null)">آماده به کار</a>