Let editors define FAQ topics freely instead of a hard-coded map

Elternbeirat.Web/Features/Faqs/FaqList.razor

@@ -17,7 +17,7 @@ else
     @foreach (var group in _groups)
     {
         <section class="faq-topic">
-            <h2>@TopicLabel(group.Key)</h2>
+            <h2>@group.Key</h2>
             @foreach (var faq in group)
             {
                 <details class="faq-item">

Elternbeirat.Web/Features/Faqs/FaqList.razor.cs

@@ -14,17 +14,6 @@ public partial class FaqList
         ILogger logger,
         Exception exception);
 
-    // German heading per topic. Unknown topics fall back to the raw key so a new
-    // topic in PocketBase still shows up rather than being silently dropped.
-    private static readonly Dictionary<string, string> TopicLabels =
-        new(StringComparer.Ordinal)
-        {
-            ["mensa"] = "Mensa und Mittagessen",
-            ["schliessfach"] = "Schließfächer",
-            ["elterneuro"] = "Eltern-Euro",
-            ["elternarbeit"] = "Elternarbeit und Mitmachen",
-        };
-
     [Inject]
     private PocketBaseClient PocketBase { get; set; } = null!;
 
@@ -57,7 +46,4 @@ public partial class FaqList
             SourceUnavailable.SetStatus(HttpContext);
         }
     }
-
-    private static string TopicLabel(string topic)
-        => TopicLabels.GetValueOrDefault(topic, topic);
 }