feat(calendar): add feed subscription, bulk export, share & Google Cal

- /api/kalender.ics SSR route: ICS feed of all calendar items (webcal-subscribable, Cache 1h)
- buildICSFeed() / downloadICSFeed() for multi-event ICS export
- googleCalUrl() deep-link pre-fills Google Calendar create form
- Web Share API per event (navigator.share on mobile, clipboard fallback on desktop)
  — "Kopiert\!" toast per event for 2s after clipboard write
- Actions bar (subscribe + bulk export) only rendered after onMount
  — Apple platforms: webcal:// link opens Calendar.app natively
  — All others: direct ICS download via <a download>

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/calendar-ics.ts

@@ -122,6 +122,72 @@ export function downloadICS(item: CalendarItemICS, filename: string): void {
   URL.revokeObjectURL(url);
 }
 
+/** Builds a VCALENDAR with multiple VEVENTs — for feed/bulk export. */
+export function buildICSFeed(items: CalendarItemICS[], calName = "Windwiderstand Termine"): string {
+  const now = new Date();
+  const lines: string[] = [
+    "BEGIN:VCALENDAR",
+    "VERSION:2.0",
+    "PRODID:-//windwiderstand.de//calendar//DE",
+    "CALSCALE:GREGORIAN",
+    "METHOD:PUBLISH",
+    foldLine(`X-WR-CALNAME:${escapeText(calName)}`),
+    "X-WR-TIMEZONE:Europe/Berlin",
+    "REFRESH-INTERVAL;VALUE=DURATION:PT1H",
+    "X-PUBLISHED-TTL:PT1H",
+  ];
+  for (const item of items) {
+    const start = item.start;
+    const end = item.end ?? new Date(start.getTime() + 60 * 60 * 1000);
+    const uid = item.uid ?? deterministicUid(item.title, start);
+    lines.push(
+      "BEGIN:VEVENT",
+      `UID:${uid}`,
+      `DTSTAMP:${fmtICSDate(now)}`,
+      `DTSTART:${fmtICSDate(start)}`,
+      `DTEND:${fmtICSDate(end)}`,
+      foldLine(`SUMMARY:${escapeText(item.title)}`),
+    );
+    if (item.description) lines.push(foldLine(`DESCRIPTION:${escapeText(item.description)}`));
+    if (item.location) lines.push(foldLine(`LOCATION:${escapeText(item.location)}`));
+    if (item.url) lines.push(foldLine(`URL:${item.url}`));
+    lines.push("END:VEVENT");
+  }
+  lines.push("END:VCALENDAR");
+  return lines.join("\r\n");
+}
+
+/** Triggers a browser download of a multi-event ICS file. */
+export function downloadICSFeed(items: CalendarItemICS[], filename: string): void {
+  if (typeof window === "undefined") return;
+  const safeName = filename.replace(/[/\\:*?"<>|]/g, "_") || "termine.ics";
+  const ics = buildICSFeed(items);
+  const blob = new Blob([ics], { type: "text/calendar;charset=utf-8" });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement("a");
+  a.href = url;
+  a.download = safeName.endsWith(".ics") ? safeName : `${safeName}.ics`;
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  URL.revokeObjectURL(url);
+}
+
+/** Deep-link to Google Calendar's pre-filled create form. */
+export function googleCalUrl(item: CalendarItemICS): string {
+  const fmt = (d: Date) =>
+    d.toISOString().replace(/[-:]/g, "").replace(/\.\d+Z$/, "Z");
+  const end = item.end ?? new Date(item.start.getTime() + 60 * 60 * 1000);
+  const params = new URLSearchParams({
+    action: "TEMPLATE",
+    text: item.title,
+    dates: `${fmt(item.start)}/${fmt(end)}`,
+  });
+  if (item.description) params.set("details", item.description);
+  if (item.location) params.set("location", item.location);
+  return `https://calendar.google.com/calendar/render?${params}`;
+}
+
 /** OpenStreetMap search URL for an address or place name. */
 export function mapsUrl(location: string): string {
   return `https://www.openstreetmap.org/search?query=${encodeURIComponent(location)}`;

src/lib/components/blocks/CalendarBlock.svelte

@@ -1,14 +1,13 @@
 <script lang="ts">
     import { onMount, onDestroy } from "svelte";
     import { getBlockLayoutClasses } from "$lib/block-layout";
-  import type {
+    import type { CalendarBlockData, CalendarItemData } from "$lib/block-types";
-    CalendarBlockData,
-    CalendarItemData,
-  } from "$lib/block-types";
     import { t as tStatic, T } from "$lib/translations";
     import type { Translations } from "$lib/translations";
     import {
         downloadICS,
+        downloadICSFeed,
+        googleCalUrl,
         mapsUrl,
         type CalendarItemICS,
     } from "$lib/calendar-ics";
@@ -23,7 +22,11 @@
         spanDayKeys: string[];
     };
 
-  let { block, translations = {} }: { block: CalendarBlockData; translations?: Translations | null } = $props();
+    let {
+        block,
+        translations = {},
+    }: { block: CalendarBlockData; translations?: Translations | null } =
+        $props();
 
     function t(key: string, replacements?: Record<string, string | number>) {
         return tStatic(translations ?? null, key, replacements);
@@ -115,8 +118,7 @@
                 const start = parseDate(x.terminZeit);
                 const end = parseDate(x.terminEnde);
                 if (!start) return null;
-        const isMultiDay =
+                const isMultiDay = !!end && dayKey(end) !== dayKey(start);
-          !!end && dayKey(end) !== dayKey(start);
                 return {
                     ...x,
                     start,
@@ -264,7 +266,10 @@
         const fmtEnd = end.toLocaleDateString("de-DE", {
             day: "numeric",
             month: "short",
-      year: end.getFullYear() !== start.getFullYear() ? "numeric" : undefined,
+            year:
+                end.getFullYear() !== start.getFullYear()
+                    ? "numeric"
+                    : undefined,
         });
         return t(T.calendar_multi_day_range, { from: fmtStart, to: fmtEnd });
     }
@@ -289,11 +294,18 @@
     function liveStatus(ev: EventCardItem): string {
         const startMs = ev.start.getTime();
         const endMs = (ev.end ?? ev.start).getTime();
-    const dayLengthMs =
+        const dayLengthMs = ev.isMultiDay
-      ev.isMultiDay ? endMs - startMs : 24 * 60 * 60 * 1000;
+            ? endMs - startMs
-    if (nowMs >= startMs && nowMs <= endMs + (ev.isMultiDay ? 0 : dayLengthMs)) {
+            : 24 * 60 * 60 * 1000;
+        if (
+            nowMs >= startMs &&
+            nowMs <= endMs + (ev.isMultiDay ? 0 : dayLengthMs)
+        ) {
             // Only flag "running" if event has a meaningful duration window
-      if (nowMs <= endMs || (ev.timeStr && nowMs <= startMs + 4 * 60 * 60 * 1000)) {
+            if (
+                nowMs <= endMs ||
+                (ev.timeStr && nowMs <= startMs + 4 * 60 * 60 * 1000)
+            ) {
                 return t(T.calendar_running_now);
             }
         }
@@ -338,7 +350,8 @@
     function urgencyOf(ev: EventCardItem): Urgency {
         const startMs = ev.start.getTime();
         const endMs = (ev.end ?? ev.start).getTime();
-    if (nowMs >= startMs && nowMs <= endMs + 4 * 60 * 60 * 1000) return "now";
+        if (nowMs >= startMs && nowMs <= endMs + 4 * 60 * 60 * 1000)
+            return "now";
         const today = new Date(nowMs);
         today.setHours(0, 0, 0, 0);
         const target = new Date(ev.start);
@@ -368,7 +381,13 @@
             s
                 .toLowerCase()
                 .replace(/[äöüß]/g, (c) =>
-          c === "ä" ? "ae" : c === "ö" ? "oe" : c === "ü" ? "ue" : "ss",
+                    c === "ä"
+                        ? "ae"
+                        : c === "ö"
+                          ? "oe"
+                          : c === "ü"
+                            ? "ue"
+                            : "ss",
                 )
                 .replace(/[^a-z0-9]+/g, "-")
                 .replace(/^-+|-+$/g, "")
@@ -386,9 +405,75 @@
         t(T.calendar_weekday_so),
     ]);
 
+    let feedHost = $state("");
+    const webcalUrl = $derived(
+        feedHost ? `webcal://${feedHost}/api/kalender.ics` : "#",
+    );
+    const icsUrl = $derived(
+        feedHost ? `/api/kalender.ics` : "#",
+    );
+    const isApplePlatform = $derived(
+        feedHost
+            ? /iPhone|iPad|iPod|Macintosh/.test(navigator.userAgent)
+            : false,
+    );
+
+    function exportAll() {
+        const icsItems: CalendarItemICS[] = items.map(toICS);
+        downloadICSFeed(icsItems, "windwiderstand-termine");
+    }
+
+    let shareToastKey = $state<string | null>(null);
+
+    async function shareEvent(
+        ev: EventCardItem,
+        titleStr: string,
+        locStr: string,
+    ): Promise<void> {
+        const dateStr = ev.start.toLocaleDateString("de-DE", {
+            weekday: "long",
+            day: "numeric",
+            month: "long",
+            year: "numeric",
+        });
+        const timeInfo = ev.timeStr ? ` · ${ev.timeStr}` : "";
+        const parts = [`${titleStr}`, `${dateStr}${timeInfo}`];
+        if (locStr) parts.push(locStr);
+        const href = getEventLinkHref(ev.link);
+        const url = href || window.location.href;
+        const text = parts.join("\n");
+        const key = ev._slug ?? String(ev.start.getTime());
+
+        const showToast = () => {
+            shareToastKey = key;
+            setTimeout(() => {
+                if (shareToastKey === key) shareToastKey = null;
+            }, 2000);
+        };
+
+        if (typeof navigator.share === "function") {
+            try {
+                await navigator.share({ title: titleStr, text, url });
+            } catch (e) {
+                if ((e as DOMException).name !== "AbortError") {
+                    await navigator.clipboard
+                        .writeText(`${text}\n${url}`)
+                        .catch(() => {});
+                    showToast();
+                }
+            }
+        } else {
+            await navigator.clipboard
+                .writeText(`${text}\n${url}`)
+                .catch(() => {});
+            showToast();
+        }
+    }
+
     let widgetEl: HTMLElement | null = $state(null);
 
     onMount(() => {
+        feedHost = window.location.host;
         tickTimer = setInterval(() => {
             nowMs = Date.now();
         }, 60_000);
@@ -400,10 +485,15 @@
 
 <div
     class="{layoutClasses} w-full min-w-0 calendar-block border border-stein-200 overflow-hidden"
-  data-block="Calendar" data-block-type="calendar"
+    data-block="Calendar"
+    data-block-type="calendar"
     data-block-slug={block._slug}
 >
-  {#snippet eventAccordion(item: EventCardItem, openByDefault: boolean, isNext: boolean)}
+    {#snippet eventAccordion(
+        item: EventCardItem,
+        openByDefault: boolean,
+        isNext: boolean,
+    )}
         {@const eventHref = getEventLinkHref(item.link)}
         {@const live = liveStatus(item)}
         {@const title = item.title || t(T.calendar_untitled)}
@@ -427,64 +517,109 @@
                als Block scannbar, große Tag-Zahl als Anker. Bei Multi-
                Day fällt das Block-Layout auf Range zurück. -->
                     {#if item.isMultiDay && item.end}
-            <div class="event-date-range shrink-0 w-20 text-center leading-tight">
+                        <div
-              <div class="text-[10px] uppercase tracking-wide text-stein-500">
+                            class="event-date-range shrink-0 w-20 text-center leading-tight"
-                {item.start.toLocaleDateString("de-DE", { month: "short" })}
+                        >
+                            <div
+                                class="text-[10px] uppercase tracking-wide text-stein-500"
+                            >
+                                {item.start.toLocaleDateString("de-DE", {
+                                    month: "short",
+                                })}
                             </div>
-              <div class="text-base font-bold text-stein-900 tabular-nums">
+                            <div
+                                class="text-base font-bold text-stein-900 tabular-nums"
+                            >
                                 {item.start.getDate()}–{item.end.getDate()}
                             </div>
                             <div class="text-[10px] text-stein-500">
-                {item.start.getFullYear() === item.end.getFullYear()
+                                {item.start.getFullYear() ===
-                  ? item.end.toLocaleDateString("de-DE", { month: "short" })
+                                item.end.getFullYear()
+                                    ? item.end.toLocaleDateString("de-DE", {
+                                          month: "short",
+                                      })
                                     : item.end.getFullYear()}
                             </div>
                         </div>
                     {:else}
-            <div class="event-date-block shrink-0 w-14 aspect-square flex flex-col items-center justify-between leading-tight bg-himmel-800 rounded-xs py-2">
+                        <div
-              <div class="text-[10px] uppercase tracking-wide text-himmel-300">
+                            class="event-date-block shrink-0 w-14 aspect-square flex flex-col items-center justify-between leading-tight bg-himmel-800 rounded-xs py-2"
-                {item.start.toLocaleDateString("de-DE", { weekday: "short" })}
+                        >
+                            <div
+                                class="text-[10px] uppercase tracking-wide text-himmel-300"
+                            >
+                                {item.start.toLocaleDateString("de-DE", {
+                                    weekday: "short",
+                                })}
                             </div>
-              <div class="text-2xl font-bold text-himmel-50 tabular-nums">
+                            <div
+                                class="text-2xl font-bold text-himmel-50 tabular-nums"
+                            >
                                 {item.start.getDate()}
                             </div>
-              <div class="text-[10px] uppercase tracking-wide text-himmel-300">
+                            <div
-                {item.start.toLocaleDateString("de-DE", { month: "short" })}
+                                class="text-[10px] uppercase tracking-wide text-himmel-300"
+                            >
+                                {item.start.toLocaleDateString("de-DE", {
+                                    month: "short",
+                                })}
                             </div>
                         </div>
                     {/if}
                     <div class="flex-1 min-w-0">
                         <div class="flex items-baseline gap-2 flex-wrap">
-              <span class="text-sm font-semibold text-stein-900 leading-snug">
+                            <span
+                                class="text-sm font-semibold text-stein-900 leading-snug"
+                            >
                                 {title}
                             </span>
                             {#if live}
-                <span class="text-[10px] uppercase tracking-wide font-semibold text-fire-50 bg-fire-700 px-1.5 py-0.5 rounded-xs shrink-0">
+                                <span
+                                    class="text-[10px] uppercase tracking-wide font-semibold text-fire-50 bg-fire-700 px-1.5 py-0.5 rounded-xs shrink-0"
+                                >
                                     {live}
                                 </span>
                             {/if}
                         </div>
-            <div class="mt-0.5 flex items-center gap-2 flex-wrap text-[11px] text-stein-600">
+                        <div
+                            class="mt-0.5 flex items-center gap-2 flex-wrap text-[11px] text-stein-600"
+                        >
                             {#if item.timeStr && !item.isMultiDay}
-                <span class="inline-flex items-center gap-1 tabular-nums">
+                                <span
-                  <Icon icon="mdi:clock-outline" class="size-3" aria-hidden="true" />
+                                    class="inline-flex items-center gap-1 tabular-nums"
+                                >
+                                    <Icon
+                                        icon="mdi:clock-outline"
+                                        class="size-3"
+                                        aria-hidden="true"
+                                    />
                                     {item.timeStr}
                                 </span>
                             {/if}
                             {#if locText}
-                <span class="inline-flex items-center gap-1 min-w-0">
+                                <span
-                  <Icon icon="mdi:map-marker-outline" class="size-3 shrink-0" aria-hidden="true" />
+                                    class="inline-flex items-center gap-1 min-w-0"
+                                >
+                                    <Icon
+                                        icon="mdi:map-marker-outline"
+                                        class="size-3 shrink-0"
+                                        aria-hidden="true"
+                                    />
                                     <span class="truncate">{locText}</span>
                                 </span>
                             {/if}
                             {#if item.tags && item.tags.length > 0}
                                 {#each item.tags.slice(0, 2) as tg}
-                  <span class="bg-himmel-100 text-himmel-800 text-[10px] px-1.5 py-0.5 rounded-xs">
+                                    <span
+                                        class="bg-himmel-100 text-himmel-800 text-[10px] px-1.5 py-0.5 rounded-xs"
+                                    >
                                         {tg}
                                     </span>
                                 {/each}
                                 {#if item.tags.length > 2}
-                  <span class="text-[10px] text-stein-500">+{item.tags.length - 2}</span>
+                                    <span class="text-[10px] text-stein-500"
+                                        >+{item.tags.length - 2}</span
+                                    >
                                 {/if}
                             {/if}
                         </div>
@@ -495,17 +630,27 @@
                         aria-hidden="true"
                     />
                 </summary>
-        <div class="px-3 pb-3 pt-0 pl-[4.75rem] text-sm text-stein-700 space-y-2">
+                <div
-          <div class="text-[11px] uppercase tracking-wide text-stein-500 -mt-1">
+                    class="px-3 pb-3 pt-0 pl-[4.75rem] text-sm text-stein-700 space-y-2"
+                >
+                    <div
+                        class="text-[11px] uppercase tracking-wide text-stein-500 -mt-1"
+                    >
                         {relativeDays(item.start)}
                     </div>
                     {#if item.description}
-            <p class="font-light text-stein-700 m-0! leading-relaxed">{item.description}</p>
+                        <p
+                            class="font-light text-stein-700 m-0! leading-relaxed"
+                        >
+                            {item.description}
+                        </p>
                     {/if}
                     {#if item.tags && item.tags.length > 2}
                         <div class="flex flex-wrap gap-1">
                             {#each item.tags as tg}
-                <span class="bg-himmel-100 text-himmel-800 text-[10px] px-1.5 py-0.5 rounded-xs">
+                                <span
+                                    class="bg-himmel-100 text-himmel-800 text-[10px] px-1.5 py-0.5 rounded-xs"
+                                >
                                     {tg}
                                 </span>
                             {/each}
@@ -520,7 +665,11 @@
                                 class="btn-tertiary btn-sm"
                             >
                                 {t(T.calendar_more_info)}
-                <Icon icon="mdi:open-in-new" class="size-3.5" aria-hidden="true" />
+                                <Icon
+                                    icon="mdi:open-in-new"
+                                    class="size-3.5"
+                                    aria-hidden="true"
+                                />
                             </a>
                         {/if}
                         {#if locText}
@@ -530,24 +679,73 @@
                                 rel="noopener noreferrer"
                                 class="btn-outline btn-sm"
                             >
-                <Icon icon="mdi:map-marker" class="size-3.5 shrink-0" aria-hidden="true" />
+                                <Icon
+                                    icon="mdi:map-marker"
+                                    class="size-3.5 shrink-0"
+                                    aria-hidden="true"
+                                />
                                 {t(T.calendar_open_maps)}
                             </a>
                         {/if}
                         <button
                             type="button"
-              onclick={() => downloadICS(toICS(item), fileSlug(title))}
+                            onclick={() =>
+                                downloadICS(toICS(item), fileSlug(title))}
                             class="btn-outline btn-sm"
                         >
-              <Icon icon="mdi:download" class="size-3.5" aria-hidden="true" />
+                            <Icon
+                                icon="mdi:download"
+                                class="size-3.5"
+                                aria-hidden="true"
+                            />
                             {t(T.calendar_download_ics)}
                         </button>
+                        <a
+                            href={googleCalUrl(toICS(item))}
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            class="btn-outline btn-sm"
+                        >
+                            <Icon
+                                icon="mdi:google"
+                                class="size-3.5"
+                                aria-hidden="true"
+                            />
+                            {t(T.calendar_add_to_google)}
+                        </a>
+                        {#if feedHost}
+                            {@const shareKey =
+                                item._slug ?? String(item.start.getTime())}
+                            {@const shared = shareToastKey === shareKey}
+                            <button
+                                type="button"
+                                onclick={() =>
+                                    shareEvent(item, title, locText)}
+                                class="btn-outline btn-sm"
+                                aria-label={t(T.calendar_share_aria)}
+                            >
+                                <Icon
+                                    icon={shared
+                                        ? "mdi:check"
+                                        : "mdi:share-variant"}
+                                    class="size-3.5"
+                                    aria-hidden="true"
+                                />
+                                {shared
+                                    ? t(T.calendar_share_copied)
+                                    : t(T.calendar_share)}
+                            </button>
+                        {/if}
                         <button
                             type="button"
                             onclick={() => jumpToEventInGrid(item)}
                             class="btn-outline btn-sm"
                         >
-              <Icon icon="mdi:calendar-search" class="size-3.5" aria-hidden="true" />
+                            <Icon
+                                icon="mdi:calendar-search"
+                                class="size-3.5"
+                                aria-hidden="true"
+                            />
                             {t(T.calendar_jump_to_month)}
                         </button>
                     </div>
@@ -565,14 +763,18 @@
     {#if allTags.length > 0}
         <!-- Tag-Filter chips. "Alle" = activeTag null. Sichtbar nur, wenn
          mindestens ein Termin Tags hat — sonst Lärm. -->
-    <div class="flex flex-wrap gap-1.5 items-center px-4 py-2 border-b border-stein-200 bg-stein-50">
+        <div
+            class="flex flex-wrap gap-1.5 items-center px-4 py-2 border-b border-stein-200 bg-stein-50"
+        >
             <span class="text-[11px] uppercase tracking-wide text-stein-500">
                 {t(T.calendar_filter_by_tag)}
             </span>
             <button
                 type="button"
                 onclick={() => (activeTag = null)}
-        class="text-[11px] px-2 py-0.5 rounded-xs border {!activeTag ? 'bg-himmel-700 text-himmel-50 border-himmel-700' : 'border-stein-300 text-stein-700 hover:bg-stein-100'}"
+                class="text-[11px] px-2 py-0.5 rounded-xs border {!activeTag
+                    ? 'bg-himmel-700 text-himmel-50 border-himmel-700'
+                    : 'border-stein-300 text-stein-700 hover:bg-stein-100'}"
                 aria-pressed={!activeTag}
             >
                 {t(T.calendar_all_tags)}
@@ -581,7 +783,10 @@
                 <button
                     type="button"
                     onclick={() => (activeTag = activeTag === tag ? null : tag)}
-          class="text-[11px] px-2 py-0.5 rounded-xs border {activeTag === tag ? 'bg-himmel-700 text-himmel-50 border-himmel-700' : 'border-stein-300 text-stein-700 hover:bg-stein-100'}"
+                    class="text-[11px] px-2 py-0.5 rounded-xs border {activeTag ===
+                    tag
+                        ? 'bg-himmel-700 text-himmel-50 border-himmel-700'
+                        : 'border-stein-300 text-stein-700 hover:bg-stein-100'}"
                     aria-pressed={activeTag === tag}
                 >
                     {tag}
@@ -590,6 +795,58 @@
         </div>
     {/if}
 
+    <!-- Subscribe + Export Actions. Nur nach mount sichtbar (feedHost gesetzt).
+         Apple: webcal:// Link → öffnet nativ Kalender.app / iOS Kalender.
+         Alle anderen: direkter ICS-Download als Fallback. -->
+    {#if feedHost}
+    <div
+        class="flex flex-wrap items-center gap-2 px-4 py-2.5 border-b border-stein-200 bg-himmel-100"
+    >
+        {#if isApplePlatform}
+            <a
+                href={webcalUrl}
+                aria-label={t(T.calendar_subscribe_aria)}
+                class="btn-primary btn-sm inline-flex items-center gap-1.5 min-h-[36px]"
+            >
+                <Icon
+                    icon="mdi:calendar-plus"
+                    class="size-3.5 shrink-0"
+                    aria-hidden="true"
+                />
+                {t(T.calendar_subscribe)}
+            </a>
+        {:else}
+            <a
+                href={icsUrl}
+                download="windwiderstand-termine.ics"
+                aria-label={t(T.calendar_subscribe_aria)}
+                class="btn-primary btn-sm inline-flex items-center gap-1.5 min-h-[36px]"
+            >
+                <Icon
+                    icon="mdi:calendar-plus"
+                    class="size-3.5 shrink-0"
+                    aria-hidden="true"
+                />
+                {t(T.calendar_subscribe)}
+            </a>
+        {/if}
+        {#if items.length > 0}
+            <button
+                type="button"
+                onclick={exportAll}
+                class="btn-outline btn-sm inline-flex items-center gap-1.5 min-h-[36px]"
+            >
+                <Icon
+                    icon="mdi:download"
+                    class="size-3.5 shrink-0"
+                    aria-hidden="true"
+                />
+                {t(T.calendar_export_all)}
+            </button>
+        {/if}
+    </div>
+    {/if}
+
     <!-- Kalender-Widget: oben, kompakt auf Mobile-Breite gecappt (sonst
        werden aspect-square cells auf Desktop gigantisch). Monat-Nav +
        Tag-Grid. Klick auf Tag filtert Liste unten. -->
@@ -605,7 +862,11 @@
                     aria-label={t(T.calendar_prev_month)}
                     onclick={prevMonth}
                 >
-          <Icon icon="mdi:chevron-left" class="size-5" aria-hidden="true" />
+                    <Icon
+                        icon="mdi:chevron-left"
+                        class="size-5"
+                        aria-hidden="true"
+                    />
                 </button>
                 <span
                     class="text-sm font-medium text-himmel-100 capitalize whitespace-nowrap"
@@ -617,13 +878,21 @@
                     aria-label={t(T.calendar_next_month)}
                     onclick={nextMonth}
                 >
-          <Icon icon="mdi:chevron-right" class="size-5" aria-hidden="true" />
+                    <Icon
+                        icon="mdi:chevron-right"
+                        class="size-5"
+                        aria-hidden="true"
+                    />
                 </button>
             </div>
 
             <div class="grid grid-cols-7 gap-1.5 text-center text-sm">
                 {#each weekdays as w}
-          <div class="py-1.5 text-xs font-medium text-himmel-100 opacity-80">{w}</div>
+                    <div
+                        class="py-1.5 text-xs font-medium text-himmel-100 opacity-80"
+                    >
+                        {w}
+                    </div>
                 {/each}
                 {#each calendarDays as d}
                     {#if d === null}
@@ -647,11 +916,21 @@
                                 onclick={() => selectDay(key)}
                                 aria-pressed={isSelected}
                                 aria-current={isToday ? "date" : undefined}
-                aria-label="{d.toLocaleDateString('de-DE', { weekday: 'long', day: 'numeric', month: 'long', year: 'numeric' })}, {dayEvents.length} {t(T.calendar_event_count, { n: dayEvents.length }).replace(/\d+\s*/, '')}"
+                                aria-label="{d.toLocaleDateString('de-DE', {
+                                    weekday: 'long',
+                                    day: 'numeric',
+                                    month: 'long',
+                                    year: 'numeric',
+                                })}, {dayEvents.length} {t(
+                                    T.calendar_event_count,
+                                    { n: dayEvents.length },
+                                ).replace(/\d+\s*/, '')}"
                             >
                                 <span class="text-xs">{d.getDate()}</span>
                                 <span
-                  class="absolute -bottom-1 -right-1 inline-flex items-center justify-center min-w-3.5 h-3.5 px-0.5 rounded-full text-stein-0 text-[9px] font-medium leading-none {isFuture ? 'bg-wald-400' : 'bg-error'}"
+                                    class="absolute -bottom-1 -right-1 inline-flex items-center justify-center min-w-3.5 h-3.5 px-0.5 rounded-full text-stein-0 text-[9px] font-medium leading-none {isFuture
+                                        ? 'bg-wald-400'
+                                        : 'bg-error'}"
                                     aria-hidden="true"
                                 >
                                     {dayEvents.length}
@@ -661,12 +940,16 @@
                             <div
                                 class="relative h-10 rounded-xs flex flex-col items-center justify-center min-w-0 cursor-default {isCurrentMonth
                                     ? 'text-himmel-100'
-                  : 'text-himmel-100 opacity-50'} {isToday ? 'today-cell' : ''}"
+                                    : 'text-himmel-100 opacity-50'} {isToday
+                                    ? 'today-cell'
+                                    : ''}"
                                 aria-current={isToday ? "date" : undefined}
                             >
                                 <span class="text-xs">{d.getDate()}</span>
                                 {#if isToday}
-                  <span class="sr-only">{t(T.calendar_today_marker)}</span>
+                                    <span class="sr-only"
+                                        >{t(T.calendar_today_marker)}</span
+                                    >
                                 {/if}
                             </div>
                         {/if}
@@ -683,20 +966,29 @@
         {#if items.length === 0}
             <p class="text-sm text-stein-500 p-4">{t(T.calendar_no_events)}</p>
         {:else if selectedDay}
-      <div class="flex items-center justify-between gap-2 px-3 py-2 border-b border-stein-200 bg-himmel-50">
+            <div
+                class="flex items-center justify-between gap-2 px-3 py-2 border-b border-stein-200 bg-himmel-50"
+            >
                 <div class="text-xs font-medium text-stein-700 truncate">
-          {new Date(selectedDay + "T12:00:00").toLocaleDateString("de-DE", {
+                    {new Date(selectedDay + "T12:00:00").toLocaleDateString(
+                        "de-DE",
+                        {
                             weekday: "long",
                             day: "numeric",
                             month: "long",
-          })}
+                        },
+                    )}
                 </div>
                 <button
                     type="button"
                     onclick={() => (selectedDay = null)}
                     class="inline-flex items-center gap-1 text-[11px] text-himmel-700 hover:text-himmel-900 hover:underline shrink-0"
                 >
-          <Icon icon="mdi:close" class="size-3.5" aria-hidden="true" />
+                    <Icon
+                        icon="mdi:close"
+                        class="size-3.5"
+                        aria-hidden="true"
+                    />
                     {t(T.calendar_clear_filter)}
                 </button>
             </div>
@@ -706,7 +998,9 @@
                 {/each}
             </ul>
         {:else if futureEventsByDay.length > 0}
-      <div class="flex items-baseline justify-between gap-2 px-3 py-2 border-b border-stein-200">
+            <div
+                class="flex items-baseline justify-between gap-2 px-3 py-2 border-b border-stein-200"
+            >
                 <h4 class="text-xs font-medium text-stein-500 m-0!">
                     {t(T.calendar_all_upcoming)}
                 </h4>
@@ -717,24 +1011,45 @@
             <ul class="m-0! p-0! list-none">
                 {#each futureEventsByDay as group, gIdx}
                     <li class="day-group">
-            <div class="px-3 py-1 bg-himmel-50/60 text-[11px] uppercase tracking-wide font-medium text-stein-600 sticky top-0 z-10 backdrop-blur-sm">
+                        <div
+                            class="px-3 py-1 bg-himmel-50/60 text-[11px] uppercase tracking-wide font-medium text-stein-600 sticky top-0 z-10 backdrop-blur-sm"
+                        >
                             {fmtGroupHeader(group.date)}
-              <span class="ml-2 text-stein-500 normal-case tracking-normal lowercase">· {relativeDays(group.date)}</span>
+                            <span
+                                class="ml-2 text-stein-500 normal-case tracking-normal lowercase"
+                                >· {relativeDays(group.date)}</span
+                            >
                         </div>
                         <ul class="m-0! p-0! list-none">
                             {#each group.events as item, eIdx}
-                {@render eventAccordion(item, gIdx === 0, gIdx === 0 && eIdx === 0)}
+                                {@render eventAccordion(
+                                    item,
+                                    gIdx === 0,
+                                    gIdx === 0 && eIdx === 0,
+                                )}
                             {/each}
                         </ul>
                     </li>
                 {/each}
             </ul>
             {#if pastEvents.length > 0}
-        <details class="border-t border-stein-200 bg-stein-50 group/past">
+                <details
-          <summary class="cursor-pointer list-none px-3 py-2 text-xs text-stein-600 hover:bg-stein-100 inline-flex items-center gap-1.5">
+                    class="border-t border-stein-200 bg-stein-50 group/past"
-            <Icon icon="mdi:chevron-right" class="size-3.5 transition-transform group-open/past:rotate-90" aria-hidden="true" />
+                >
-            <span class="font-medium uppercase tracking-wide">{t(T.calendar_past_events)}</span>
+                    <summary
-            <span class="text-stein-500 tabular-nums">· {pastEvents.length}</span>
+                        class="cursor-pointer list-none px-3 py-2 text-xs text-stein-600 hover:bg-stein-100 inline-flex items-center gap-1.5"
+                    >
+                        <Icon
+                            icon="mdi:chevron-right"
+                            class="size-3.5 transition-transform group-open/past:rotate-90"
+                            aria-hidden="true"
+                        />
+                        <span class="font-medium uppercase tracking-wide"
+                            >{t(T.calendar_past_events)}</span
+                        >
+                        <span class="text-stein-500 tabular-nums"
+                            >· {pastEvents.length}</span
+                        >
                     </summary>
                     <ul class="m-0! p-0! list-none opacity-80">
                         {#each pastEvents as item}
@@ -747,10 +1062,20 @@
             <!-- Nur Vergangene da, keine Zukunft → past-Liste expanded
            damit Panel nicht leer wirkt. -->
             <details open class="bg-stein-50 group/past">
-        <summary class="cursor-pointer list-none px-3 py-2 text-xs text-stein-600 hover:bg-stein-100 inline-flex items-center gap-1.5 border-b border-stein-200">
+                <summary
-          <Icon icon="mdi:chevron-right" class="size-3.5 transition-transform group-open/past:rotate-90" aria-hidden="true" />
+                    class="cursor-pointer list-none px-3 py-2 text-xs text-stein-600 hover:bg-stein-100 inline-flex items-center gap-1.5 border-b border-stein-200"
-          <span class="font-medium uppercase tracking-wide">{t(T.calendar_past_events)}</span>
+                >
-          <span class="text-stein-500 tabular-nums">· {pastEvents.length}</span>
+                    <Icon
+                        icon="mdi:chevron-right"
+                        class="size-3.5 transition-transform group-open/past:rotate-90"
+                        aria-hidden="true"
+                    />
+                    <span class="font-medium uppercase tracking-wide"
+                        >{t(T.calendar_past_events)}</span
+                    >
+                    <span class="text-stein-500 tabular-nums"
+                        >· {pastEvents.length}</span
+                    >
                 </summary>
                 <ul class="m-0! p-0! list-none opacity-80">
                     {#each pastEvents as item}
@@ -759,7 +1084,9 @@
                 </ul>
             </details>
         {:else}
-      <p class="text-sm text-stein-500 p-4">{t(T.calendar_no_future_events)}</p>
+            <p class="text-sm text-stein-500 p-4">
+                {t(T.calendar_no_future_events)}
+            </p>
         {/if}
     </div>
 </div>

src/lib/iconify-mdi-subset.generated.json

@@ -72,9 +72,15 @@
     "download": {
       "body": "<path fill=\"currentColor\" d=\"M5 20h14v-2H5m14-9h-4V3H9v6H5l7 7z\"/>"
     },
+    "google": {
+      "body": "<path fill=\"currentColor\" d=\"M21.35 11.1h-9.17v2.73h6.51c-.33 3.81-3.5 5.44-6.5 5.44C8.36 19.27 5 16.25 5 12c0-4.1 3.2-7.27 7.2-7.27c3.09 0 4.9 1.97 4.9 1.97L19 4.72S16.56 2 12.1 2C6.42 2 2.03 6.8 2.03 12c0 5.05 4.13 10 10.22 10c5.35 0 9.25-3.67 9.25-9.09c0-1.15-.15-1.81-.15-1.81\"/>"
+    },
     "calendar-search": {
       "body": "<path fill=\"currentColor\" d=\"M15.5 12c2.5 0 4.5 2 4.5 4.5c0 .88-.25 1.71-.69 2.4l3.08 3.1L21 23.39l-3.12-3.07c-.69.43-1.51.68-2.38.68c-2.5 0-4.5-2-4.5-4.5s2-4.5 4.5-4.5m0 2a2.5 2.5 0 0 0-2.5 2.5a2.5 2.5 0 0 0 2.5 2.5a2.5 2.5 0 0 0 2.5-2.5a2.5 2.5 0 0 0-2.5-2.5M19 8H5v11h4.5c.31.75.76 1.42 1.31 2H5a2 2 0 0 1-2-2V5c0-1.11.89-2 2-2h1V1h2v2h8V1h2v2h1a2 2 0 0 1 2 2v8.03c-.5-.81-1.2-1.49-2-2.03z\"/>"
     },
+    "calendar-plus": {
+      "body": "<path fill=\"currentColor\" d=\"M19 19V8H5v11zM16 1h2v2h1a2 2 0 0 1 2 2v14c0 1.11-.89 2-2 2H5a2 2 0 0 1-2-2V5c0-1.11.89-2 2-2h1V1h2v2h8zm-5 8.5h2v3h3v2h-3v3h-2v-3H8v-2h3z\"/>"
+    },
     "arrow-right": {
       "body": "<path fill=\"currentColor\" d=\"M4 11v2h12l-5.5 5.5l1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5L16 11z\"/>"
     },

src/lib/translations.ts

@@ -137,6 +137,13 @@ const TRANSLATION_KEYS = [
   "calendar_untitled",
   "calendar_show_more",
   "calendar_show_less",
+  "calendar_subscribe",
+  "calendar_subscribe_aria",
+  "calendar_export_all",
+  "calendar_add_to_google",
+  "calendar_share",
+  "calendar_share_copied",
+  "calendar_share_aria",
   "post_overview_all",
   "blog_search_label",
   "blog_search_placeholder",

src/routes/api/kalender.ics/+server.ts

@@ -0,0 +1,57 @@
+import type { RequestHandler } from '@sveltejs/kit';
+import { env } from '$env/dynamic/public';
+import { getCalendarItems } from '$lib/cms';
+import { buildICSFeed, type CalendarItemICS } from '$lib/calendar-ics';
+import type { CalendarItemData } from '$lib/block-types';
+
+function parseDate(iso: string | undefined | null): Date | null {
+  if (!iso) return null;
+  const d = new Date(iso);
+  return isNaN(d.getTime()) ? null : d;
+}
+
+function locationText(loc: unknown): string {
+  if (typeof loc === 'string') return loc;
+  if (loc && typeof loc === 'object') {
+    const t = (loc as { text?: unknown }).text;
+    if (typeof t === 'string') return t;
+  }
+  return '';
+}
+
+export const GET: RequestHandler = async () => {
+  const siteName = env.PUBLIC_SITE_NAME || 'Windwiderstand';
+
+  let rawItems: Awaited<ReturnType<typeof getCalendarItems>> = [];
+  try {
+    rawItems = await getCalendarItems();
+  } catch {
+    rawItems = [];
+  }
+
+  const icsItems: CalendarItemICS[] = rawItems
+    .flatMap((raw) => {
+      const item = raw as unknown as CalendarItemData;
+      const start = parseDate(item.terminZeit);
+      if (!start) return [];
+      const end = parseDate(item.terminEnde ?? null) ?? undefined;
+      const entry: CalendarItemICS = {
+        title: item.title || 'Termin',
+        start,
+        end,
+        description: (item as { description?: string }).description ?? undefined,
+        location: locationText((item as { location?: unknown }).location) || undefined,
+      };
+      return [entry];
+    });
+
+  const body = buildICSFeed(icsItems, `${siteName} – Termine`);
+
+  return new Response(body, {
+    headers: {
+      'Content-Type': 'text/calendar; charset=utf-8',
+      'Content-Disposition': 'inline; filename="windwiderstand-termine.ics"',
+      'Cache-Control': 'public, max-age=3600',
+    },
+  });
+};