Extract date rendering into per-feature Date components

Elternbeirat.Web/Features/Events/EventDate.razor.cs

@@ -0,0 +1,18 @@
+using Elternbeirat.Contracts;
+using Microsoft.AspNetCore.Components;
+
+namespace Elternbeirat.Web.Features.Events;
+
+/// <summary>
+///     Renders an event's date range as a <c>&lt;time&gt;</c> element, in both a
+///     machine-readable and a visitor-facing form.
+/// </summary>
+public partial class EventDate
+{
+    /// <summary>
+    ///     The event whose date range to render.
+    /// </summary>
+    [Parameter]
+    [EditorRequired]
+    public Event Value { get; set; } = null!;
+}