Add ::: team block rendering board members as person cards with initials avatars

Elternbeirat.Web.Tests/PocketBaseFixture.cs

@@ -235,7 +235,16 @@ public sealed class PocketBaseFixture : IAsyncLifetime
         });
         await CreateRecordAsync(http, "pages", new
         {
-            title = "Vorstandsteam", body = "# Vorstand", location = "header",
+            // The body uses the "::: team" block like production: one card with the
+            // full convention (bold name, role, italic duties, note) in a large block,
+            // and one item without the convention, which must become a plain card.
+            title = "Vorstandsteam",
+            body = "## Vorsitz\n\n::: team gross\n"
+                   + "- **Jenny Reger-Stilgenbauer** (Vorsitzende)  \n  *Schulkonferenz, Mensarat*  \n  Mitglied im Gesamtelternbeirat.\n"
+                   + ":::\n\n## Beisitz\n\n::: team\n"
+                   + "- Özlem Ünal, Beisitz\n"
+                   + ":::",
+            location = "header",
             order = 2, slug = "board", embed = Array.Empty<string>(), @public = true,
         });
         await CreateRecordAsync(http, "pages", new