Restructure into feature folders with code-behind and scoped CSS

Elternbeirat.Web/Features/Posts/PostDetail.razor

@@ -0,0 +1,20 @@
+@page "/beitraege/{Slug}"
+@inject PostService PostService
+
+@if (_post is null)
+{
+    <PageTitle>Nicht gefunden</PageTitle>
+}
+else
+{
+    <PageTitle>@_post.Title</PageTitle>
+    <article>
+        <p class="post-meta">
+            <a href="/beitraege">&larr; Alle Beiträge</a>
+            <time datetime="@_post.Date.ToString("yyyy-MM-dd")">
+                @_post.Date.ToString("d. MMMM yyyy", German)
+            </time>
+        </p>
+        @((MarkupString)_post.ContentHtml)
+    </article>
+}