Style editor Markdown with .markdown-body and add ::: design blocks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Elternbeirat.Web.Tests/RouteSmokeTests.cs

@@ -138,7 +138,22 @@ public sealed partial class RouteSmokeTests : IDisposable
 
         var html = await client.GetStringAsync(new Uri("/patrons", UriKind.Relative));
 
-        html.ShouldContain("Förderverein"); // the page body, rendered from Markdown
+        html.ShouldContain("Der Förderverein unterstützt die Schule."); // the page body, rendered from Markdown
+    }
+
+    [Fact]
+    public async Task Content_page_body_carries_the_markdown_styles_and_blocks()
+    {
+        // The editor-content styles in app.css all hang off .markdown-body, and the
+        // design blocks off the class a ":::" container renders. Assert both reach
+        // the markup of a real page, so a renamed wrapper or a pipeline without
+        // custom containers fails here instead of silently unstyling the site.
+        var client = _factory.CreateClient();
+
+        var html = await client.GetStringAsync(new Uri("/patrons", UriKind.Relative));
+
+        html.ShouldContain("class=\"markdown-body\"");
+        html.ShouldContain("<div class=\"kennzahlen\">");
     }
 
     [Fact]