Add events calendar with ICS feed and switch content naming to English

Elternbeirat.Web/Components/Layout/MainLayout.razor

@@ -9,6 +9,7 @@
                 <NavLink href="/vorstandsteam">Vorstandsteam</NavLink>
                 <NavLink href="/foerderverein">Förderverein</NavLink>
                 <NavLink href="/beitraege">Beiträge</NavLink>
+                <NavLink href="/termine">Termine</NavLink>
                 <NavLink href="/faq">FAQ</NavLink>
                 <NavLink href="/downloads">Downloads</NavLink>
                 <NavLink href="/kontakt">Kontakt</NavLink>

Elternbeirat.Web/Components/Pages/EventList.razor

@@ -0,0 +1,91 @@
+@page "/termine"
+@using System.Globalization
+@using Elternbeirat.Web.Services
+@inject EventService EventService
+
+<PageTitle>Termine</PageTitle>
+
+<h1>Termine</h1>
+
+<p class="intro">
+    Alle Termine des Elternbeirats auf einen Blick. Sie können den Kalender auch
+    <a href="/termine.ics">abonnieren</a> und in Ihrer Kalender-App automatisch
+    aktuell halten.
+</p>
+
+<h2>Kommende Termine</h2>
+
+@if (EventService.Upcoming.Count == 0)
+{
+    <p>Zurzeit sind keine Termine geplant.</p>
+}
+else
+{
+    <ul class="event-list">
+        @foreach (var ev in EventService.Upcoming)
+        {
+            <li>
+                <time datetime="@ev.Start.ToString("s")">@Format(ev)</time>
+                <span class="event-title">@ev.Title</span>
+                @if (!string.IsNullOrWhiteSpace(ev.Location))
+                {
+                    <span class="event-location">@ev.Location</span>
+                }
+                @if (!string.IsNullOrWhiteSpace(ev.Note))
+                {
+                    <p class="event-note">@ev.Note</p>
+                }
+            </li>
+        }
+    </ul>
+}
+
+@if (EventService.Past.Count > 0)
+{
+    <h2>Vergangene Termine</h2>
+    <ul class="event-list event-list-past">
+        @foreach (var ev in EventService.Past)
+        {
+            <li>
+                <time datetime="@ev.Start.ToString("s")">@Format(ev)</time>
+                <span class="event-title">@ev.Title</span>
+                @if (!string.IsNullOrWhiteSpace(ev.Location))
+                {
+                    <span class="event-location">@ev.Location</span>
+                }
+            </li>
+        }
+    </ul>
+}
+
+@code {
+    private static readonly CultureInfo _german = CultureInfo.GetCultureInfo("de-DE");
+
+    // Formats the entry's date range for display: a single day, a date with a
+    // time, or a span across days.
+    private static string Format(Event ev)
+    {
+        var start = ev.HasTime
+            ? ev.Start.ToString("dddd, d. MMMM yyyy, HH:mm", _german) + " Uhr"
+            : ev.Start.ToString("dddd, d. MMMM yyyy", _german);
+
+        if (ev.End is not { } end)
+        {
+            return start;
+        }
+
+        // Same day: append just the end time. Different days: append the full
+        // end date.
+        if (end.Date == ev.Start.Date)
+        {
+            return ev.HasTime
+                ? start + "–" + end.ToString("HH:mm", _german) + " Uhr"
+                : start;
+        }
+
+        var endText = ev.HasTime
+            ? end.ToString("d. MMMM yyyy, HH:mm", _german) + " Uhr"
+            : end.ToString("d. MMMM yyyy", _german);
+        return start + " – " + endText;
+    }
+}