Read a post's date as the Berlin calendar day, not the raw UTC day

Elternbeirat.Web.Tests/PocketBaseFixture.cs

@@ -283,10 +283,13 @@ public sealed class PocketBaseFixture : IAsyncLifetime
             order = 9, slug = "draft", embed = Array.Empty<string>(), @public = false,
         });
 
-        // Posts: newest first once sorted by -date.
+        // Posts: newest first once sorted by -date. The first post is stored as
+        // 2026-03-01 23:30Z on purpose: that is 2 March 00:30 in Berlin (winter,
+        // UTC+1). An editor who picked 2 March must get 2 March back -- the date is
+        // the Berlin day, so it must NOT be read as the raw UTC day (1 March).
         await CreateRecordAsync(http, "posts", new
         {
-            date = "2026-03-01 00:00:00.000Z", title = "Neuer Vorstand",
+            date = "2026-03-01 23:30:00.000Z", title = "Neuer Vorstand",
             body = "Text", slug = "new-board", @public = true,
         });
         await CreateRecordAsync(http, "posts", new