Unify post and event cards to one style on the home page

Elternbeirat.Web/Features/Posts/PostList.razor

@@ -29,8 +29,10 @@ else
         @foreach (var post in _posts)
         {
             <li>
-                <a href="@($"/posts/{post.Slug}")">@post.Title</a>
-                <PostDate Value="post.Date" />
+                <a class="card-link" href="@($"/posts/{post.Slug}")">
+                    <span class="post-title">@post.Title</span>
+                    <PostDate Value="post.Date" />
+                </a>
             </li>
         }
     </ul>