Take the page heading from the Markdown body, not a separate <h1>

Elternbeirat.Web/Features/Pages/ContentPage.razor

@@ -8,10 +8,7 @@
 else if (_page is not null)
 {
     <PageTitle>@_page.Title</PageTitle>
-    <article>
+    <article>@Body</article>
-        <h1>@_page.Title</h1>
-        @Body
-    </article>
     <PageEmbeds Embed="_page.Embed" />
 }
 @* No page and not unavailable: the slug was unknown; NavigationManager.NotFound()

Elternbeirat.Web/Features/Posts/PostDetail.razor

@@ -12,12 +12,9 @@ else if (_post is not null)
         <a href="/posts">&larr; Alle Beiträge</a>
     </nav>
     <article>
-        <header>
-            <h1>@_post.Title</h1>
         <time class="post-meta" datetime="@_post.Date.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture)">
             @_post.Date.ToString("d. MMMM yyyy", Cultures.German)
         </time>
-        </header>
         @Body
     </article>
 }

Elternbeirat.Web/Features/Posts/PostDetail.razor.css

@@ -1,13 +1,7 @@
 .post-meta {
-    display: flex;
-    justify-content: space-between;
-    align-items: baseline;
-    gap: 1rem;
-    margin-bottom: 1rem;
-}
-
-.post-meta time {
     display: block;
     color: var(--color-text-soft);   /* token, so it adapts in dark mode */
     font-size: 0.85rem;
+    margin-top: 1.5rem;              /* space from the "all posts" link above */
+    margin-bottom: 0.25rem;         /* keep the body close below */
 }