feat(termin): vollwertige Detailseite + QR/Detail-Link im Kalender

/termin/<slug> ist jetzt echte Seite statt Redirect:
- alle Infos ungekürzt (Datum/Zeit in Europe/Berlin, Ort+Maps, Tags,
  Bild+Lightbox, volle Beschreibung, Anhang, externer Link)
- alle Aktionen: ICS, Google, Link kopieren, Teilen, QR, Social-Bild
- Link zum Kalender drunter (kein Auto-Redirect mehr)
- Breite via Layout-.container-custom (gleich wie andere Seiten)
- SEO: OG/Twitter/canonical zentral aus Layout (kein Doppel-Tag),
  Event-JSON-LD + Breadcrumb für Rich Results / Share-Preview

CalendarBlock: QR-Button + "Details →"-Link je Termin (→ /termin/<slug>/).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/lib/components/blocks/CalendarBlock.svelte

@@ -17,6 +17,7 @@
     import Icon from "@iconify/svelte";
     import ImageModal from "$lib/components/ImageModal.svelte";
     import SocialImageModal from "$lib/components/SocialImageModal.svelte";
+    import QrModal from "$lib/components/QrModal.svelte";
 
     type EventCardItem = CalendarItemData & {
         start: Date;
@@ -458,6 +459,18 @@
         socialModal = null;
     }
 
+    // QR-Code zum direkten Ausgeben/Scannen (Aushang, Infostand). Nutzt die
+    // canonical /termin/<slug>-URL (hat OG-Tags + Redirect), Fallback = Hash-
+    // Anchor im Kalender wenn kein Slug.
+    let qrModal = $state<{ value: string; label: string } | null>(null);
+
+    function openQr(item: EventCardItem) {
+        const url = item._slug
+            ? `${window.location.origin}/termin/${encodeURIComponent(item._slug)}/`
+            : `${window.location.origin}${window.location.pathname}#${eventId(item)}`;
+        qrModal = { value: url, label: item.title || "Termin" };
+    }
+
     function eventId(item: EventCardItem): string {
         if (item._slug) return `event-${item._slug}`;
         const titlePart = (item.title || "event")
@@ -781,8 +794,21 @@
 
                     <!-- Aktionen: Primary-Reihe (Info/Karte/Anhang) + kompakte Action-Toolbar -->
                     <div class="pt-2 space-y-2">
-                        {#if eventHref || locText || item.attachment?.src}
+                        {#if item._slug || eventHref || locText || item.attachment?.src}
                             <div class="flex flex-wrap gap-2">
+                                {#if item._slug}
+                                    <a
+                                        href={`/termin/${encodeURIComponent(item._slug)}/`}
+                                        class="btn-tertiary btn-sm"
+                                    >
+                                        Details
+                                        <Icon
+                                            icon="mdi:arrow-right"
+                                            class="size-3.5"
+                                            aria-hidden="true"
+                                        />
+                                    </a>
+                                {/if}
                                 {#if eventHref}
                                     <a
                                         href={eventHref}
@@ -902,6 +928,16 @@
                                             Bild
                                         </button>
                                     {/if}
+                                    <button
+                                        type="button"
+                                        onclick={() => openQr(item)}
+                                        class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 hover:bg-white"
+                                        title="QR-Code anzeigen & herunterladen"
+                                        aria-label="QR-Code anzeigen & herunterladen"
+                                    >
+                                        <Icon icon="mdi:qrcode" class="size-3.5" />
+                                        QR
+                                    </button>
                                 </div>
                             {/if}
 
@@ -1325,6 +1361,15 @@
     />
 {/if}
 
+{#if qrModal}
+    <QrModal
+        value={qrModal.value}
+        label={qrModal.label}
+        sublabel="Termin-Link"
+        onclose={() => (qrModal = null)}
+    />
+{/if}
+
 <style>
     /* Heute-Markierung im Kalendergrid: dezenter Rand + leichtes Glow.
      Ergänzt das Event-Badge, damit auch leere Tage als "Heute"

src/routes/termin/[slug]/+page.server.ts

@@ -5,14 +5,16 @@ import { marked } from "$lib/markdown-safe";
 import { env } from "$env/dynamic/public";
 
 /**
- * SEO-Detail-Route pro Termin. Hat eigene OG-Tags (für Link-Previews bei
- * Facebook/WhatsApp/Twitter), leitet sonst weiter an /kalender/#event-<slug>
- * (das war die ursprüngliche Hash-basierte Ziel-URL und bleibt damit
- * funktional).
+ * Eigenständige Detail-Seite pro Termin: alle Infos + Aktionen ungekürzt,
+ * eigene OG-Tags (Link-Previews FB/WhatsApp/Twitter) und ein Link zum
+ * Kalender (KEIN Redirect mehr — die Seite ist das Ziel des QR-/Direktlinks).
  *
- * Crawler bekommen die Meta-Tags zu sehen, normale Browser werden via
- * Client-Side-Redirect (im +page.svelte) sofort zum Kalender geschickt.
+ * terminZeit ist mit Offset gespeichert (z. B. 10:00+02:00). Labels müssen in
+ * Europe/Berlin gerendert werden, sonst zeigt der SSR-Prozess (Server-TZ=UTC)
+ * 2h zu früh.
  */
+const TZ = "Europe/Berlin";
+
 export const load: PageServerLoad = async ({ params, setHeaders }) => {
   const slug = params.slug;
   const rawItem = await getCalendarItemBySlug(slug, { locale: "de" });
@@ -20,41 +22,77 @@ export const load: PageServerLoad = async ({ params, setHeaders }) => {
   const item = rawItem as typeof rawItem & {
     location?: unknown;
     description?: string;
+    terminEnde?: string;
+    tags?: string[];
+    image?: unknown;
+    attachment?: { src?: string; label?: string };
+    link?: unknown;
   };
 
   const siteBaseUrl = (env.PUBLIC_SITE_URL || "").replace(/\/$/, "");
   const title = (item.title ?? "Termin").trim();
   const terminZeit = item.terminZeit;
+  const terminEnde = item.terminEnde ?? null;
+  const hasTime = !!terminZeit && !/T00:00:00/.test(terminZeit);
+
+  const weekdayLabel = terminZeit
+    ? new Date(terminZeit).toLocaleDateString("de-DE", { weekday: "long", timeZone: TZ })
+    : "";
   const dateLabel = terminZeit
     ? new Date(terminZeit).toLocaleDateString("de-DE", {
-        weekday: "long",
         day: "2-digit",
         month: "long",
         year: "numeric",
+        timeZone: TZ,
       })
     : "";
-  const timeLabel =
-    terminZeit && !/T00:00:00/.test(terminZeit)
+  const timeLabel = hasTime
     ? new Date(terminZeit).toLocaleTimeString("de-DE", {
         hour: "2-digit",
         minute: "2-digit",
+        timeZone: TZ,
       }) + " Uhr"
     : "";
+  const endDateLabel =
+    terminEnde && !/T00:00:00/.test(terminEnde)
+      ? new Date(terminEnde).toLocaleDateString("de-DE", {
+          day: "2-digit",
+          month: "long",
+          year: "numeric",
+          timeZone: TZ,
+        })
+      : "";
 
-  const locationText =
+  const locObj =
     typeof item.location === "object" && item.location !== null
-      ? (((item.location as { text?: string }).text ?? "").trim() || null)
+      ? (item.location as { text?: string; lat?: number; lng?: number })
       : null;
+  const locationText = locObj
+    ? (locObj.text ?? "").trim() || null
+    : typeof item.location === "string"
+      ? item.location.trim() || null
+      : null;
+  const hasCoords =
+    !!locObj && typeof locObj.lat === "number" && typeof locObj.lng === "number";
 
-  // Plain-Text-Snippet aus Description (Markdown → Text, ~200 Zeichen)
-  let descriptionPlain = "";
-  if (item.description) {
-    const html = marked.parse(item.description) as string;
-    descriptionPlain = html
+  // Externer Link / Post-Link
+  let externalLink: string | null = null;
+  const link = item.link as { url?: string; _slug?: string } | string | undefined;
+  if (typeof link === "string" && link) externalLink = link;
+  else if (link && typeof link === "object") {
+    if (link.url) externalLink = link.url;
+    else if (link._slug) externalLink = `/post/${encodeURIComponent(link._slug)}`;
+  }
+
+  const descriptionHtml = item.description
+    ? (marked.parse(item.description) as string)
+    : "";
+  const descriptionPlain = descriptionHtml
     .replace(/<[^>]+>/g, " ")
     .replace(/\s+/g, " ")
     .trim();
-  }
+
+  const tags = Array.isArray(item.tags) ? item.tags.filter((t) => typeof t === "string") : [];
 
   const seoDescription = [
     dateLabel + (timeLabel ? `, ${timeLabel}` : ""),
@@ -66,8 +104,54 @@ export const load: PageServerLoad = async ({ params, setHeaders }) => {
 
   const socialImage = `${siteBaseUrl}/api/social/calendar/${encodeURIComponent(slug)}?format=og`;
   const calendarUrl = `/kalender/#event-${slug}`;
+  const canonical = `${siteBaseUrl}/termin/${encodeURIComponent(slug)}/`;
+
+  // schema.org Event — Rich-Result/SEO für Termine (Datum, Ort, Veranstalter).
+  const jsonLd = terminZeit
+    ? [
+        {
+          "@context": "https://schema.org",
+          "@type": "Event",
+          name: title,
+          startDate: terminZeit,
+          ...(terminEnde ? { endDate: terminEnde } : {}),
+          eventAttendanceMode: "https://schema.org/OfflineEventAttendanceMode",
+          eventStatus: "https://schema.org/EventScheduled",
+          ...(siteBaseUrl ? { url: canonical } : {}),
+          inLanguage: "de-DE",
+          ...(descriptionPlain ? { description: descriptionPlain.slice(0, 500) } : {}),
+          image: socialImage,
+          organizer: {
+            "@type": "Organization",
+            name: "Windwiderstand Thüringen",
+            ...(siteBaseUrl ? { url: siteBaseUrl } : {}),
+          },
+          ...(locationText
+            ? {
+                location: {
+                  "@type": "Place",
+                  name: locationText,
+                  ...(hasCoords
+                    ? {
+                        geo: {
+                          "@type": "GeoCoordinates",
+                          latitude: locObj!.lat,
+                          longitude: locObj!.lng,
+                        },
+                      }
+                    : {}),
+                },
+              }
+            : {}),
+        },
+      ]
+    : [];
+
+  const breadcrumbItems = [
+    { label: "Kalender", href: "/kalender/" },
+    { label: title },
+  ];
 
-  // CDN/Browser dürfen die SEO-Antwort cachen, da Crawler sie selten neu holen.
   setHeaders({
     "cache-control": "public, s-maxage=300, stale-while-revalidate=3600",
   });
@@ -77,14 +161,28 @@ export const load: PageServerLoad = async ({ params, setHeaders }) => {
     seoDescription,
     socialImage,
     ogType: "article" as const,
+    jsonLd,
+    breadcrumbItems,
     calendarUrl,
     item: {
       slug,
       title,
+      terminZeit: terminZeit ?? null,
+      terminEnde,
+      hasTime,
+      weekdayLabel,
       dateLabel,
       timeLabel,
+      endDateLabel,
       locationText,
-      descriptionPlain: descriptionPlain.slice(0, 400),
+      descriptionHtml,
+      tags,
+      image: item.image ?? null,
+      attachment:
+        item.attachment && item.attachment.src
+          ? { src: item.attachment.src, label: item.attachment.label ?? "Anhang" }
+          : null,
+      externalLink,
     },
   };
 };

src/routes/termin/[slug]/+page.svelte

@@ -1,42 +1,256 @@
 <script lang="ts">
-  import { onMount } from "svelte";
   import type { PageData } from "./$types";
+  import Icon from "@iconify/svelte";
+  import "$lib/iconify-offline";
+  import { useTranslate, T } from "$lib/translations";
+  import {
+    downloadICS,
+    googleCalUrl,
+    mapsUrl,
+    type CalendarItemICS,
+  } from "$lib/calendar-ics";
+  import { getCmsImageUrl, extractCmsImageField } from "$lib/rusty-image";
+  import QrModal from "$lib/components/QrModal.svelte";
+  import SocialImageModal from "$lib/components/SocialImageModal.svelte";
+  import ImageModal from "$lib/components/ImageModal.svelte";
 
   let { data }: { data: PageData } = $props();
+  const t = useTranslate();
+  const item = $derived(data.item);
 
-  onMount(() => {
-    // JS-Redirect zum Kalender-Hash-Anchor (für normale Nutzer).
-    // Crawler ignorieren das und nutzen die OG-Tags aus dem Server-HTML.
-    window.location.replace(data.calendarUrl);
+  // Kanonische URL dieser Seite (für ICS-Link, Teilen, QR).
+  let pageUrl = $state("");
+  $effect(() => {
+    pageUrl = typeof window !== "undefined" ? window.location.href : "";
   });
+
+  function toICS(): CalendarItemICS {
+    const start = item.terminZeit ? new Date(item.terminZeit) : new Date();
+    const descPlain = item.descriptionHtml
+      ? item.descriptionHtml.replace(/<[^>]+>/g, " ").replace(/\s+/g, " ").trim()
+      : "";
+    return {
+      title: item.title,
+      start,
+      end: item.terminEnde ? new Date(item.terminEnde) : null,
+      description: descPlain || undefined,
+      location: item.locationText || undefined,
+      url: item.externalLink || pageUrl || undefined,
+    };
+  }
+
+  function fileSlug(s: string): string {
+    return (
+      s.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-|-$/g, "") || "termin"
+    );
+  }
+
+  let qrOpen = $state(false);
+  let socialOpen = $state(false);
+  let modalImage = $state<{ src: string; alt: string } | null>(null);
+  let copied = $state(false);
+  let shared = $state(false);
+
+  async function copyLink() {
+    await navigator.clipboard.writeText(pageUrl).catch(() => {});
+    copied = true;
+    setTimeout(() => (copied = false), 2000);
+  }
+
+  async function share() {
+    const text = [
+      item.title,
+      `${item.weekdayLabel}, ${item.dateLabel}${item.timeLabel ? ` · ${item.timeLabel}` : ""}`,
+      item.locationText,
+    ]
+      .filter(Boolean)
+      .join("\n");
+    if (typeof navigator.share === "function") {
+      try {
+        await navigator.share({ title: item.title, text, url: pageUrl });
+        return;
+      } catch (e) {
+        if ((e as DOMException).name === "AbortError") return;
+      }
+    }
+    await navigator.clipboard.writeText(`${text}\n${pageUrl}`).catch(() => {});
+    shared = true;
+    setTimeout(() => (shared = false), 2000);
+  }
+
+  // Event-Bild auflösen
+  const imageField = $derived(item.image ? extractCmsImageField(item.image) : null);
+  const thumbSrc = $derived(
+    imageField ? getCmsImageUrl(imageField.url, { width: 900, fit: "contain" }) : null,
+  );
+  const fullSrc = $derived(
+    imageField ? getCmsImageUrl(imageField.url, { width: 1600, fit: "contain" }) : null,
+  );
+  const imageAlt = $derived(imageField?.alt ?? item.title);
+
+  const descHtml = $derived(item.descriptionHtml || "");
 </script>
 
-<svelte:head>
-  <!-- Fallback-Redirect für Browser ohne JS (~0.5s Delay) -->
-  <meta http-equiv="refresh" content="1; url={data.calendarUrl}" />
-  <!-- Robots-Hinweis: Crawler sollen die Hash-URL als Canonical sehen, aber
-       diese Detail-Route bleibt indexierbar, damit Social-Previews greifen. -->
-</svelte:head>
+<!-- SEO/OG/Twitter/canonical + Event-JSON-LD + Breadcrumb kommen zentral aus
+     +layout.svelte (liest seoTitle/seoDescription/socialImage/ogType/jsonLd/
+     breadcrumbItems aus $page.data). Hier KEINE eigenen Head-Tags → sonst
+     Doppel-Tags, die Scraper (WhatsApp/FB) verwirren. -->
+<!-- Breite kommt vom Layout-Wrapper (.container-custom in +layout.svelte) —
+     hier nur vertikaler Abstand, KEIN eigenes max-w/mx-auto/px (sonst schmaler
+     + doppeltes Padding ggü. den anderen Seiten). -->
+<article class="pt-10 pb-4">
+  <p class="mb-2 text-xs font-semibold uppercase tracking-wider text-wald-700">Termin</p>
+  <h1 class="mb-4 text-3xl font-bold leading-tight text-stein-900">{item.title}</h1>
 
-<div class="mx-auto max-w-2xl px-4 py-12 text-center">
-  <p class="mb-2 text-xs uppercase tracking-wider text-stein-500">Termin</p>
-  <h1 class="mb-4 text-2xl font-bold text-stein-900">{data.item.title}</h1>
-  {#if data.item.dateLabel}
-    <p class="text-stein-700">
-      {data.item.dateLabel}{data.item.timeLabel ? `, ${data.item.timeLabel}` : ""}
+  <!-- Eckdaten -->
+  <div class="space-y-1.5 text-stein-700">
+    {#if item.dateLabel}
+      <p class="flex items-center gap-2">
+        <Icon icon="mdi:calendar" class="size-5 shrink-0 text-wald-700" aria-hidden="true" />
+        <span class="font-medium">
+          {item.weekdayLabel ? `${item.weekdayLabel}, ` : ""}{item.dateLabel}{item.endDateLabel
+            ? ` – ${item.endDateLabel}`
+            : ""}
+        </span>
       </p>
     {/if}
-  {#if data.item.locationText}
-    <p class="mt-1 text-stein-500">📍 {data.item.locationText}</p>
+    {#if item.timeLabel}
+      <p class="flex items-center gap-2">
+        <Icon icon="mdi:clock-outline" class="size-5 shrink-0 text-wald-700" aria-hidden="true" />
+        <span class="tabular-nums">{item.timeLabel}</span>
+      </p>
     {/if}
-  {#if data.item.descriptionPlain}
-    <p class="mt-4 text-sm text-stein-600">{data.item.descriptionPlain}</p>
-  {/if}
-  <p class="mt-8 text-xs text-stein-400">Du wirst gerade zum Kalender weitergeleitet…</p>
+    {#if item.locationText}
+      <p class="flex items-center gap-2">
+        <Icon icon="mdi:map-marker" class="size-5 shrink-0 text-wald-700" aria-hidden="true" />
         <a
-    href={data.calendarUrl}
-    class="mt-4 inline-block rounded-md bg-wald-700 px-4 py-2 text-sm font-medium text-white no-underline hover:bg-wald-800"
+          href={mapsUrl(item.locationText)}
+          target="_blank"
+          rel="noopener noreferrer"
+          class="text-stein-700 underline underline-offset-2 hover:text-wald-700"
         >
-    Im Kalender anzeigen
+          {item.locationText}
+        </a>
+      </p>
+    {/if}
+  </div>
+
+  {#if item.tags.length > 0}
+    <div class="mt-4 flex flex-wrap gap-1.5">
+      {#each item.tags as tg}
+        <span class="rounded-xs bg-himmel-100 px-2 py-0.5 text-xs text-himmel-800">{tg}</span>
+      {/each}
+    </div>
+  {/if}
+
+  {#if thumbSrc && fullSrc}
+    <button
+      type="button"
+      onclick={() => (modalImage = { src: fullSrc, alt: imageAlt })}
+      class="group relative mt-6 block w-full overflow-hidden rounded-md"
+      aria-label="Bild vergrößern"
+    >
+      <img src={thumbSrc} alt={imageAlt} class="w-full object-contain" loading="lazy" />
+    </button>
+  {/if}
+
+  {#if descHtml}
+    <div class="prose prose-stein mt-6 max-w-none font-light leading-relaxed">
+      {@html descHtml}
+    </div>
+  {/if}
+
+  {#if item.attachment}
+    <a
+      href={`/cms-files?src=${encodeURIComponent(item.attachment.src)}&dl=1`}
+      class="btn-outline btn-sm mt-6 inline-flex group"
+    >
+      <Icon icon="mdi:file-download" class="size-4 shrink-0" aria-hidden="true" />
+      <span>{item.attachment.label}</span>
+    </a>
+  {/if}
+
+  {#if item.externalLink}
+    <div class="mt-4">
+      <a
+        href={item.externalLink}
+        target="_blank"
+        rel="noopener noreferrer"
+        class="btn-tertiary btn-sm inline-flex"
+      >
+        {t(T.calendar_more_info)}
+        <Icon icon="mdi:open-in-new" class="size-3.5" aria-hidden="true" />
       </a>
     </div>
+  {/if}
+
+  <!-- Aktionen ungekürzt -->
+  <div class="mt-8 flex flex-wrap items-center gap-2 rounded-md border border-stein-200 bg-stein-50 p-2">
+    <button type="button" onclick={() => downloadICS(toICS(), fileSlug(item.title))} class="action-btn">
+      <Icon icon="mdi:download" class="size-4" /> ICS
+    </button>
+    <a href={googleCalUrl(toICS())} target="_blank" rel="noopener noreferrer" class="action-btn no-underline">
+      <Icon icon="mdi:google" class="size-4" /> Google
+    </a>
+    <span class="mx-1 h-5 w-px bg-stein-300" aria-hidden="true"></span>
+    <button type="button" onclick={copyLink} class="action-btn">
+      <Icon icon={copied ? "mdi:check" : "mdi:link-variant"} class="size-4" />
+      {copied ? t(T.post_action_copied) : "Link"}
+    </button>
+    <button type="button" onclick={share} class="action-btn">
+      <Icon icon={shared ? "mdi:check" : "mdi:share-variant"} class="size-4" />
+      {shared ? t(T.calendar_share_copied) : t(T.calendar_share)}
+    </button>
+    <button type="button" onclick={() => (qrOpen = true)} class="action-btn">
+      <Icon icon="mdi:qrcode" class="size-4" /> QR
+    </button>
+    <button type="button" onclick={() => (socialOpen = true)} class="action-btn">
+      <Icon icon="mdi:image-outline" class="size-4" /> Bild
+    </button>
+  </div>
+
+  <!-- Link zum Kalender (kein Redirect) -->
+  <div class="mt-10 border-t border-stein-200 pt-6">
+    <a
+      href={data.calendarUrl}
+      class="inline-flex items-center gap-1.5 text-sm font-medium text-wald-700 underline underline-offset-2 hover:text-wald-800"
+    >
+      <Icon icon="mdi:calendar-month" class="size-4" aria-hidden="true" />
+      Alle Termine im Kalender
+    </a>
+  </div>
+</article>
+
+{#if modalImage}
+  <ImageModal src={modalImage.src} alt={modalImage.alt} onclose={() => (modalImage = null)} />
+{/if}
+
+{#if qrOpen}
+  <QrModal value={pageUrl} label={item.title} sublabel="Termin-Link" onclose={() => (qrOpen = false)} />
+{/if}
+
+{#if socialOpen}
+  <SocialImageModal
+    open={true}
+    title={item.title}
+    slug={item.slug}
+    endpointBase="/api/social/calendar"
+    downloadPrefix="termin"
+    onclose={() => (socialOpen = false)}
+  />
+{/if}
+
+<style>
+  .action-btn {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.3rem;
+    border-radius: 0.25rem;
+    padding: 0.35rem 0.6rem;
+    font-size: 0.8rem;
+    color: var(--color-stein-700);
+  }
+  .action-btn:hover {
+    background: #fff;
+  }
+</style>