Read heading and intro from the pages record on /posts and /events

Elternbeirat.Web/Features/Posts/PostList.razor.cs

@@ -23,6 +23,11 @@ public partial class PostList
     [CascadingParameter]
     private HttpContext? HttpContext { get; set; }
 
+    // The "posts" page record supplies the heading and intro text, so an editor owns
+    // them in PocketBase like every other page, instead of them being hard-coded here.
+    // Null until loaded, or when no such page exists.
+    private Page? _page;
+
     private IReadOnlyList<Post> _posts = [];
 
     // Set when the content source could not be reached or read. The markup then
@@ -30,11 +35,18 @@ public partial class PostList
     // 503 this sets on the response.
     private bool _unavailable;
 
+    // The page body rendered from Markdown to HTML, ready to emit as a MarkupString.
+    private MarkupString Body => (MarkupString)Markdown.ToHtml(_page?.Body);
+
     protected override async Task OnInitializedAsync()
     {
         try
         {
-            _posts = await PocketBase.GetPostsAsync(HttpContext?.RequestAborted ?? CancellationToken.None);
+            var token = HttpContext?.RequestAborted ?? CancellationToken.None;
+            var pages = await PocketBase.GetPagesAsync(token);
+            _page = pages.FirstOrDefault(
+                page => string.Equals(page.Slug, "posts", StringComparison.OrdinalIgnoreCase));
+            _posts = await PocketBase.GetPostsAsync(token);
         }
         catch (PocketBaseUnavailableException exception)
         {