fix: replace emoji with hero image in blog sidebar doctor card

- Post.cshtml.cs: load hero image, tag from SiteSettings in SetViewDataAsync
- Post.cshtml: show <img> with hero image in .doc-avatar when set,
  fall back to emoji only if no image is configured
- .doc-avatar: circular crop with object-fit:cover, gold border
- doc-title now uses HeroTag from settings (not hardcoded)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

DrSousan.Api/Pages/Blog/Post.cshtml.cs

@@ -135,9 +135,12 @@ public class PostModel : PageModel
         ViewData["ArticleType"] = post.ArticleType;
         ViewData["Slug"]        = post.Slug;
 
-        var s = await _db.SiteSettings
-            .FirstOrDefaultAsync(x => x.Section == "hero" && x.Key == "name");
-        ViewData["SiteName"] = s?.Value ?? "دکتر سوسن آل‌طه";
+        var heroSettings = await _db.SiteSettings
+            .Where(x => x.Section == "hero" && (x.Key == "name" || x.Key == "image" || x.Key == "tag"))
+            .ToListAsync();
+        ViewData["SiteName"]  = heroSettings.FirstOrDefault(x => x.Key == "name")?.Value  ?? "دکتر سوسن آل‌طه";
+        ViewData["HeroImage"] = heroSettings.FirstOrDefault(x => x.Key == "image")?.Value ?? "";
+        ViewData["HeroTag"]   = heroSettings.FirstOrDefault(x => x.Key == "tag")?.Value   ?? "پزشک عمومی و متخصص زیبایی پوست";
     }
 
     // View model for comments