feat: Social-Bild erweitert (Logo, Status-Pill, Description, Story, Themes) + OG-Route + Calendar-Buttons aufgeräumt

Social-Bild-Endpoint:
- Logo aus page_config (gefärbt in Theme-Akzent) statt Wordmark
- Status-Pill (ONLINE/Demo/Info/Anhörung/Stammtisch/Sitzung) aus
  Titel-Keywords und Tags, mit eigener Farbe
- Description-Snippet unter Titel (Square + Story)
- Story-Format 1080x1920 ergänzt
- Theme-Varianten: wald (default), transparent-onlight,
  transparent-ondark
- Uhrzeit unter Datum (2. Zeile) mit Clock-Icon im Akzent-Grün
- QR linksbündig bei Square + Story, kleiner (180px)
- Location-Pin top-aligned, Title-Fontsize dynamisch bei langen Titeln

Neue Route /termin/[slug]: OG-Meta-Tags für Link-Previews
(FB/WhatsApp/Twitter), JS-Redirect zu /kalender/#event-<slug>.
QR-Code im Social-Bild zeigt jetzt auf /termin/[slug].

Calendar-Block Aktionen reorganisiert:
- Primary-Reihe: Mehr Info, Auf Karte, Anhang
- Kompakte Toolbar (gerahmt): Kalender (ICS, Google) | Teilen (Link,
  Share, Bild) | Im Grid
- Theme-Selector im Social-Modal mit Vorschau-Hintergrund-Indikator

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

src/lib/components/blocks/CalendarBlock.svelte

@@ -447,6 +447,7 @@
     let modalImage = $state<{ src: string; alt: string } | null>(null);
     let linkedSlug = $state<string | null>(null);
     let socialModal = $state<{ slug: string; title: string } | null>(null);
+    let socialTheme = $state<"wald" | "transparent-onlight" | "transparent-ondark">("wald");
 
     function openSocial(item: EventCardItem) {
         if (!item._slug) return;
@@ -767,7 +768,10 @@
                         {/if}
                     {/if}
 
-                    <div class="flex flex-wrap gap-2 pt-1 text-xs">
+                    <!-- Aktionen: Primary-Reihe (Info/Karte/Anhang) + kompakte Action-Toolbar -->
+                    <div class="pt-2 space-y-2">
+                        {#if eventHref || locText || item.attachment?.src}
+                            <div class="flex flex-wrap gap-2">
                                 {#if eventHref}
                                     <a
                                         href={eventHref}
@@ -796,9 +800,7 @@
                                             class="size-3.5 shrink-0"
                                             aria-hidden="true"
                                         />
-                                <span class="whitespace-nowrap"
-                                    >{t(T.calendar_open_maps)}</span
-                                >
+                                        <span class="whitespace-nowrap">{t(T.calendar_open_maps)}</span>
                                     </a>
                                 {/if}
                                 {#if item.attachment?.src}
@@ -806,129 +808,98 @@
                                     <a
                                         href={dlSrc}
                                         class="btn-outline btn-sm group"
-                                aria-label={item.attachment.label ||
-                                    "Anhang herunterladen"}
+                                        aria-label={item.attachment.label || "Anhang herunterladen"}
                                     >
                                         <Icon
                                             icon="mdi:file-download"
                                             class="size-3.5 shrink-0"
                                             aria-hidden="true"
                                         />
-                                <span class="whitespace-nowrap"
-                                    >{item.attachment.label ||
-                                        "Anhang herunterladen"}</span
-                                >
+                                        <span class="whitespace-nowrap">{item.attachment.label || "Anhang"}</span>
                                     </a>
                                 {/if}
+                            </div>
+                        {/if}
+
+                        <!-- Kompakte Action-Toolbar: gruppiert (Kalender · Teilen · Anzeigen) mit Separatoren -->
+                        <div class="flex flex-wrap items-center gap-1 rounded-md border border-stein-200 bg-stein-50 p-1">
+                            <!-- Kalender-Aktionen -->
+                            <span class="px-1.5 text-[10px] uppercase tracking-wide text-stein-400">Kalender</span>
                             <button
                                 type="button"
-                            onclick={() =>
-                                downloadICS(toICS(item), fileSlug(title))}
-                            class="btn-outline btn-sm group"
+                                onclick={() => downloadICS(toICS(item), fileSlug(title))}
+                                class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 hover:bg-white"
+                                title={t(T.calendar_download_ics)}
                                 aria-label={t(T.calendar_download_ics)}
                             >
-                            <Icon
-                                icon="mdi:download"
-                                class="size-3.5 shrink-0"
-                                aria-hidden="true"
-                            />
-                            <span class="whitespace-nowrap"
-                                >{t(T.calendar_download_ics)}</span
-                            >
+                                <Icon icon="mdi:download" class="size-3.5" />
+                                ICS
                             </button>
                             <a
                                 href={googleCalUrl(toICS(item))}
                                 target="_blank"
                                 rel="noopener noreferrer"
-                            class="btn-outline btn-sm group"
-                            aria-label={t(T.calendar_add_to_google)}
-                        >
-                            <Icon
-                                icon="mdi:google"
-                                class="size-3.5 shrink-0"
-                                aria-hidden="true"
-                            />
-                            <span class="whitespace-nowrap"
-                                >{t(T.calendar_add_to_google)}</span
+                                class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 no-underline hover:bg-white"
+                                title={t(T.calendar_add_to_google)}
                             >
+                                <Icon icon="mdi:google" class="size-3.5" />
+                                Google
                             </a>
+
                             {#if feedHost}
-                            {@const shareKey =
-                                item._slug ?? String(item.start.getTime())}
+                                {@const shareKey = item._slug ?? String(item.start.getTime())}
                                 {@const copied = copyToastKey === shareKey}
+                                {@const shared = shareToastKey === shareKey}
+                                <span class="mx-1 h-4 w-px bg-stein-300" aria-hidden="true"></span>
+                                <span class="px-1.5 text-[10px] uppercase tracking-wide text-stein-400">Teilen</span>
                                 <button
                                     type="button"
                                     onclick={() => copyEventLink(item)}
-                                class="btn-outline btn-sm group"
+                                    class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 hover:bg-white"
+                                    title={t(T.post_action_copy)}
                                     aria-label={t(T.post_action_copy)}
                                 >
-                                <Icon
-                                    icon={copied
-                                        ? "mdi:check"
-                                        : "mdi:link-variant"}
-                                    class="size-3.5 shrink-0"
-                                    aria-hidden="true"
-                                />
-                                <span class="whitespace-nowrap"
-                                    >{copied
-                                        ? t(T.post_action_copied)
-                                        : t(T.post_action_copy)}</span
-                                >
+                                    <Icon icon={copied ? "mdi:check" : "mdi:link-variant"} class="size-3.5" />
+                                    {copied ? t(T.post_action_copied) : "Link"}
                                 </button>
-                            {@const shared = shareToastKey === shareKey}
                                 <button
                                     type="button"
                                     onclick={() => shareEvent(item, title, locText)}
-                                class="btn-outline btn-sm group"
+                                    class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 hover:bg-white"
+                                    title={t(T.calendar_share_aria)}
                                     aria-label={t(T.calendar_share_aria)}
                                 >
-                                <Icon
-                                    icon={shared
-                                        ? "mdi:check"
-                                        : "mdi:share-variant"}
-                                    class="size-3.5 shrink-0"
-                                    aria-hidden="true"
-                                />
-                                <span class="whitespace-nowrap"
-                                    >{shared
-                                        ? t(T.calendar_share_copied)
-                                        : t(T.calendar_share)}</span
-                                >
+                                    <Icon icon={shared ? "mdi:check" : "mdi:share-variant"} class="size-3.5" />
+                                    {shared ? t(T.calendar_share_copied) : t(T.calendar_share)}
                                 </button>
-                        {/if}
                                 {#if item._slug}
                                     <button
                                         type="button"
                                         onclick={() => openSocial(item)}
-                                class="btn-outline btn-sm group"
-                                aria-label="Social-Bild als Vorschau öffnen"
+                                        class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-700 hover:bg-white"
                                         title="Social-Bild Vorschau"
+                                        aria-label="Social-Bild Vorschau"
                                     >
-                                <Icon
-                                    icon="mdi:image-outline"
-                                    class="size-3.5 shrink-0"
-                                    aria-hidden="true"
-                                />
-                                <span class="whitespace-nowrap">Social-Bild</span>
+                                        <Icon icon="mdi:image-outline" class="size-3.5" />
+                                        Bild
                                     </button>
                                 {/if}
+                            {/if}
+
+                            <span class="ml-auto"></span>
                             <button
                                 type="button"
                                 onclick={() => jumpToEventInGrid(item)}
-                            class="btn-outline btn-sm group"
+                                class="inline-flex items-center gap-1 rounded px-1.5 py-1 text-[11px] text-stein-500 hover:bg-white"
+                                title={t(T.calendar_jump_to_month)}
                                 aria-label={t(T.calendar_jump_to_month)}
                             >
-                            <Icon
-                                icon="mdi:calendar-search"
-                                class="size-3.5 shrink-0"
-                                aria-hidden="true"
-                            />
-                            <span class="whitespace-nowrap"
-                                >{t(T.calendar_jump_to_month)}</span
-                            >
+                                <Icon icon="mdi:calendar-search" class="size-3.5" />
+                                Im Grid
                             </button>
                         </div>
                     </div>
+                </div>
             </details>
         </li>
     {/snippet}
@@ -1323,8 +1294,16 @@
 {/if}
 
 {#if socialModal}
-    {@const ogUrl = `/api/social/calendar/${socialModal.slug}?format=og`}
-    {@const sqUrl = `/api/social/calendar/${socialModal.slug}?format=square`}
+    {@const themeQ = socialTheme === "wald" ? "" : `&theme=${socialTheme}`}
+    {@const ogUrl = `/api/social/calendar/${socialModal.slug}?format=og${themeQ}`}
+    {@const sqUrl = `/api/social/calendar/${socialModal.slug}?format=square${themeQ}`}
+    {@const storyUrl = `/api/social/calendar/${socialModal.slug}?format=story${themeQ}`}
+    {@const previewBg =
+        socialTheme === "wald"
+            ? "bg-stein-50"
+            : socialTheme === "transparent-onlight"
+                ? "bg-[repeating-linear-gradient(45deg,#f5f5f4,#f5f5f4_10px,#e7e5e4_10px,#e7e5e4_20px)]"
+                : "bg-[repeating-linear-gradient(45deg,#292524,#292524_10px,#1c1917_10px,#1c1917_20px)]"}
     <div
         class="fixed inset-0 z-[100] flex items-center justify-center bg-black/80 p-4"
         role="dialog"
@@ -1335,7 +1314,7 @@
         tabindex="-1"
     >
         <div
-            class="relative max-h-[92vh] w-full max-w-4xl overflow-y-auto rounded-lg bg-white p-5 shadow-2xl"
+            class="relative max-h-[92vh] w-full max-w-5xl overflow-y-auto rounded-lg bg-white p-5 shadow-2xl"
             onclick={(e) => e.stopPropagation()}
             role="presentation"
         >
@@ -1354,18 +1333,59 @@
                 </button>
             </div>
 
-            <div class="grid gap-4 sm:grid-cols-2">
+            <!-- Theme-Selector -->
+            <div class="mb-4 rounded-lg border border-stein-200 bg-stein-50 p-3">
+                <p class="mb-2 text-[11px] font-medium uppercase tracking-wider text-stein-500">Hintergrund</p>
+                <div class="flex flex-wrap gap-2">
+                    <button
+                        type="button"
+                        onclick={() => (socialTheme = "wald")}
+                        class="flex items-center gap-1.5 rounded-md border px-2.5 py-1.5 text-xs font-medium transition
+                            {socialTheme === 'wald' ? 'border-wald-500 bg-wald-100 text-wald-800' : 'border-stein-300 bg-white text-stein-700 hover:bg-stein-50'}"
+                    >
+                        <span class="size-3 rounded-full bg-gradient-to-br from-wald-900 to-wald-600"></span>
+                        Wald (Standard)
+                    </button>
+                    <button
+                        type="button"
+                        onclick={() => (socialTheme = "transparent-onlight")}
+                        class="flex items-center gap-1.5 rounded-md border px-2.5 py-1.5 text-xs font-medium transition
+                            {socialTheme === 'transparent-onlight' ? 'border-wald-500 bg-wald-100 text-wald-800' : 'border-stein-300 bg-white text-stein-700 hover:bg-stein-50'}"
+                        title="Transparenter Hintergrund mit dunklem Text — für eigene helle Bild-Hintergründe"
+                    >
+                        <span class="size-3 rounded-full border border-stein-300 bg-[repeating-linear-gradient(45deg,#fff,#fff_2px,#e5e5e5_2px,#e5e5e5_4px)]"></span>
+                        Transparent · für helle Hintergründe
+                    </button>
+                    <button
+                        type="button"
+                        onclick={() => (socialTheme = "transparent-ondark")}
+                        class="flex items-center gap-1.5 rounded-md border px-2.5 py-1.5 text-xs font-medium transition
+                            {socialTheme === 'transparent-ondark' ? 'border-wald-500 bg-wald-100 text-wald-800' : 'border-stein-300 bg-white text-stein-700 hover:bg-stein-50'}"
+                        title="Transparenter Hintergrund mit hellem Text — für eigene dunkle Bild-Hintergründe"
+                    >
+                        <span class="size-3 rounded-full border border-stein-300 bg-[repeating-linear-gradient(45deg,#1c1917,#1c1917_2px,#44403c_2px,#44403c_4px)]"></span>
+                        Transparent · für dunkle Hintergründe
+                    </button>
+                </div>
+                {#if socialTheme !== "wald"}
+                    <p class="mt-2 text-[10px] text-stein-500">
+                        Vorschau-Hintergrund zeigt nur, wie der Text aussieht — die heruntergeladene PNG hat echten Alpha-Kanal.
+                    </p>
+                {/if}
+            </div>
+
+            <div class="grid gap-4 sm:grid-cols-3">
                 <div class="flex flex-col gap-2">
                     <p class="text-xs font-medium text-stein-600">Quer · 1200 × 630</p>
                     <img
                         src={ogUrl}
                         alt="Social-Bild Quer"
-                        class="w-full rounded-sm border border-stein-200 bg-stein-50"
+                        class="w-full rounded-sm border border-stein-200 {previewBg}"
                         loading="eager"
                     />
                     <a
                         href={ogUrl}
-                        download={`termin-${socialModal.slug}-og.png`}
+                        download={`termin-${socialModal.slug}-og-${socialTheme}.png`}
                         class="btn-outline btn-sm justify-center no-underline!"
                     >
                         <Icon icon="mdi:download" class="size-3.5" />
@@ -1377,22 +1397,40 @@
                     <img
                         src={sqUrl}
                         alt="Social-Bild Quadrat"
-                        class="mx-auto w-full max-w-[300px] rounded-sm border border-stein-200 bg-stein-50 sm:max-w-none"
+                        class="mx-auto w-full rounded-sm border border-stein-200 {previewBg}"
                         loading="eager"
                     />
                     <a
                         href={sqUrl}
-                        download={`termin-${socialModal.slug}-square.png`}
+                        download={`termin-${socialModal.slug}-square-${socialTheme}.png`}
                         class="btn-outline btn-sm justify-center no-underline!"
                     >
                         <Icon icon="mdi:download" class="size-3.5" />
                         Quadrat herunterladen
                     </a>
                 </div>
+                <div class="flex flex-col gap-2">
+                    <p class="text-xs font-medium text-stein-600">Story · 1080 × 1920</p>
+                    <img
+                        src={storyUrl}
+                        alt="Social-Bild Story"
+                        class="mx-auto w-auto max-h-[280px] rounded-sm border border-stein-200 {previewBg}"
+                        loading="eager"
+                    />
+                    <a
+                        href={storyUrl}
+                        download={`termin-${socialModal.slug}-story-${socialTheme}.png`}
+                        class="btn-outline btn-sm justify-center no-underline!"
+                    >
+                        <Icon icon="mdi:download" class="size-3.5" />
+                        Story herunterladen
+                    </a>
+                </div>
             </div>
 
             <p class="mt-4 text-[11px] text-stein-400">
-                Die Bilder werden automatisch generiert. Für Posts auf Instagram, Facebook, WhatsApp oder als Hintergrund-Grafik.
+                Quer: Facebook/Twitter/Link-Preview. Quadrat: Instagram-Feed. Story: Instagram/WhatsApp Story.
+                Transparent-Varianten lassen sich als Overlay auf eigene Hintergründe in Stories einsetzen.
             </p>
         </div>
     </div>

src/routes/api/social/calendar/[slug]/+server.ts

@@ -5,13 +5,20 @@ import { html as htmlToReact } from "satori-html";
 import { Resvg } from "@resvg/resvg-js";
 import { toBuffer as qrToBuffer } from "qrcode";
 import { env } from "$env/dynamic/public";
-import { getCalendarItemBySlug } from "$lib/cms";
+import { getCalendarItemBySlug, getPageConfigs } from "$lib/cms";
 
-type Format = "og" | "square";
+type Format = "og" | "square" | "story";
+/**
+ * - `wald` = voller dunkler Hintergrund (default, Stand-Alone-Post)
+ * - `transparent-onlight` = transparent + dunkler Text (für helle Bild-Hintergründe)
+ * - `transparent-ondark` = transparent + heller Text (für dunkle Bild-Hintergründe)
+ */
+type Theme = "wald" | "transparent-onlight" | "transparent-ondark";
 
 const SIZES: Record<Format, { w: number; h: number }> = {
   og: { w: 1200, h: 630 },
   square: { w: 1080, h: 1080 },
+  story: { w: 1080, h: 1920 },
 };
 
 const FONT_URLS: Record<string, string> = {
@@ -22,6 +29,61 @@ const FONT_URLS: Record<string, string> = {
 
 let fontCache: { regular: ArrayBuffer; semibold: ArrayBuffer; bold: ArrayBuffer } | null = null;
 
+let logoSvgCache: { svg: string; recolored: Record<string, string> } | null = null;
+
+/**
+ * Holt das site-Logo aus page_config (inline SVG-Buffer). Nur SVGs werden
+ * unterstützt — Bitmap-Logos werden für die statische Wordmark-Fallback-
+ * Variante übersprungen.
+ */
+async function loadLogo(): Promise<string | null> {
+  if (logoSvgCache) return logoSvgCache.svg;
+  try {
+    const configs = await getPageConfigs({ locale: "de" });
+    const cfg = configs[0];
+    const rawLogo = (cfg as { logo?: unknown })?.logo;
+    const rawSrc =
+      typeof rawLogo === "string"
+        ? rawLogo
+        : (rawLogo as { src?: string } | undefined)?.src ?? null;
+    if (!rawSrc) return null;
+    const cmsBase = (env.PUBLIC_CMS_URL || "http://localhost:3000").replace(/\/$/, "");
+    const u = rawSrc.startsWith("//")
+      ? `https:${rawSrc}`
+      : rawSrc.startsWith("/")
+        ? `${cmsBase}${rawSrc}`
+        : rawSrc.startsWith("http")
+          ? rawSrc
+          : `${cmsBase}/api/assets/${rawSrc}`;
+    if (!u.split("?")[0].toLowerCase().endsWith(".svg")) return null;
+    const res = await fetch(u);
+    if (!res.ok) return null;
+    let text = (await res.text()).trim();
+    // XML-Prolog + DOCTYPE entfernen — satori/resvg embed brauchen pures <svg>.
+    text = text.replace(/<\?xml[^?]*\?>/g, "").replace(/<!DOCTYPE[^>]*>/g, "").trim();
+    if (!text.startsWith("<svg")) return null;
+    logoSvgCache = { svg: text, recolored: {} };
+    return text;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Färbt das Logo in einer Theme-Farbe ein — naive Replace-Approach für
+ * gängige Mono-SVGs (alle currentColor/black/fill-Werte werden ersetzt).
+ */
+function colorizeLogo(svg: string, color: string): string {
+  if (!logoSvgCache) return svg;
+  if (logoSvgCache.recolored[color]) return logoSvgCache.recolored[color];
+  const recolored = svg
+    .replace(/fill="(?!none)[^"]*"/gi, `fill="${color}"`)
+    .replace(/stroke="(?!none)[^"]*"/gi, `stroke="${color}"`)
+    .replace(/currentColor/gi, color);
+  logoSvgCache.recolored[color] = recolored;
+  return recolored;
+}
+
 async function loadFonts() {
   if (fontCache) return fontCache;
   const [regular, semibold, bold] = await Promise.all(
@@ -51,12 +113,25 @@ function weekday(iso: string | undefined): string {
 
 const cache = new Map<string, { png: Buffer; ts: number }>();
 const CACHE_TTL = 10 * 60_000; // 10min
-const CACHE_VERSION = "v4";
+const CACHE_VERSION = "v18";
+
+function parseFormat(v: string | null): Format {
+  if (v === "square") return "square";
+  if (v === "story") return "story";
+  return "og";
+}
+
+function parseTheme(v: string | null): Theme {
+  if (v === "transparent-ondark" || v === "transparent-light") return "transparent-ondark";
+  if (v === "transparent-onlight" || v === "transparent-dark" || v === "transparent") return "transparent-onlight";
+  return "wald";
+}
 
 export const GET: RequestHandler = async ({ params, url, setHeaders }) => {
   const slug = params.slug;
-  const formatParam = url.searchParams.get("format") === "square" ? "square" : "og";
-  const cacheKey = `${CACHE_VERSION}:${slug}:${formatParam}`;
+  const formatParam = parseFormat(url.searchParams.get("format"));
+  const themeParam = parseTheme(url.searchParams.get("theme"));
+  const cacheKey = `${CACHE_VERSION}:${slug}:${formatParam}:${themeParam}`;
   const now = Date.now();
   const cached = cache.get(cacheKey);
   if (cached && now - cached.ts < CACHE_TTL) {
@@ -69,10 +144,15 @@ export const GET: RequestHandler = async ({ params, url, setHeaders }) => {
 
   const itemRaw = await getCalendarItemBySlug(slug, { locale: "de" });
   if (!itemRaw) throw error(404, "Termin nicht gefunden");
-  const item = itemRaw as typeof itemRaw & { location?: unknown };
+  const item = itemRaw as typeof itemRaw & {
+    location?: unknown;
+    tags?: unknown;
+    description?: string;
+  };
 
   const { w, h } = SIZES[formatParam];
   const fonts = await loadFonts();
+  const logoSvg = await loadLogo();
 
   const title = (item.title ?? "").trim();
   const { date, time } = formatDate(item.terminZeit);
@@ -82,65 +162,235 @@ export const GET: RequestHandler = async ({ params, url, setHeaders }) => {
       ? ((item.location as { text?: string }).text ?? "").trim()
       : "";
 
+  // Status-Pill aus erstem Tag (oder Pattern in Titel).
+  // Erkennt: online, demo, anhörung, infoabend, stammtisch, sitzung
+  const titleLower = title.toLowerCase();
+  const tagList = Array.isArray(item.tags)
+    ? (item.tags as unknown[]).map((t) =>
+        typeof t === "string" ? t : (t as { _slug?: string })?._slug ?? "",
+      )
+    : [];
+  const statusInfo = (() => {
+    const candidates = [titleLower, ...tagList.map((t) => t.toLowerCase())];
+    const has = (kw: string) => candidates.some((c) => c.includes(kw));
+    if (has("demo") || has("protest") || has("kundgebung"))
+      return { label: "Demo", color: "#e35651" };
+    if (has("online") || has("zoom") || has("webinar"))
+      return { label: "Online", color: "#436e85" };
+    if (has("anhörung") || has("anhoerung"))
+      return { label: "Anhörung", color: "#b08a52" };
+    if (has("infoabend") || has("infoveranstaltung") || has("info-"))
+      return { label: "Info", color: "#5e6fa3" };
+    if (has("stammtisch") || has("treffen"))
+      return { label: "Stammtisch", color: "#8a567a" };
+    if (has("sitzung") || has("ratssitzung"))
+      return { label: "Sitzung", color: "#6e8c46" };
+    return null;
+  })();
+
+  // Plain-Text-Snippet aus Description (~110 Zeichen) für Snippet unter Titel.
+  let descSnippet = "";
+  if (item.description) {
+    descSnippet = item.description
+      .replace(/[#*_`~>\[\]]/g, " ")
+      .replace(/\s+/g, " ")
+      .trim();
+  }
+
   const siteUrl = (env.PUBLIC_SITE_URL || "https://windwiderstand.de").replace(/\/$/, "");
-  const eventUrl = `${siteUrl}/kalender/#event-${slug}`;
-  // QR als PNG (satori/resvg embeddet PNG zuverlässiger als SVG mit kleinen viewBox).
-  const qrPngBuf = await qrToBuffer(eventUrl, {
+  // /termin/[slug] hat eigene OG-Meta-Tags + leitet zu /kalender/#event-<slug>
+  // weiter. Damit greifen Link-Previews (FB/WhatsApp/Twitter).
+  const eventUrl = `${siteUrl}/termin/${encodeURIComponent(slug)}`;
+  // Theme-Palette: drei Varianten — Wald (full-bleed), transparent-dark
+  // (für helle Hintergründe, dunkler Text), transparent-light (für dunkle).
+  const isTransparent = themeParam !== "wald";
+  const isLight = themeParam === "transparent-ondark"; // helle Schrift auf transparent
+  const palette = isTransparent
+    ? isLight
+      ? {
+          bg: "transparent",
+          text: "#ffffff",
+          textMute: "rgba(255,255,255,0.85)",
+          textDim: "rgba(255,255,255,0.7)",
+          accent: "#a8e6c0",
+          headerLabel: "rgba(255,255,255,0.75)",
+          headerSep: "rgba(255,255,255,0.25)",
+          footerSep: "rgba(255,255,255,0.25)",
+          qrBoxBg: "#ffffff",
+        }
+      : {
+          bg: "transparent",
+          text: "#0a2011",
+          textMute: "#1a4d28",
+          textDim: "#2d7a45",
+          accent: "#1a4d28",
+          headerLabel: "#236335",
+          headerSep: "rgba(10,32,17,0.25)",
+          footerSep: "rgba(10,32,17,0.25)",
+          qrBoxBg: "#0a2011",
+        }
+    : {
+          bg: "linear-gradient(135deg,#0a2011 0%,#12361c 55%,#1a4d28 100%)",
+          text: "#ffffff",
+          textMute: "#d9e8dc",
+          textDim: "#b3d1b9",
+          accent: "#7fb58a",
+          headerLabel: "#7fb58a",
+          headerSep: "#1a4d28",
+          footerSep: "#1a4d28",
+          qrBoxBg: "#ffffff",
+        };
+
+  const isStory = formatParam === "story";
+  const isSquare = formatParam === "square";
+  const verticalStack = isStory || isSquare;
+
+  // Format-spezifische Größen — Title-Fontsize dynamisch, damit lange Titel
+  // (≥30 Zeichen → 2+ Zeilen) keinen Overlap mit Location verursachen.
+  const titleLen = title.length;
+  const titleFs = isStory
+    ? titleLen > 70 ? 60 : 76
+    : isSquare
+      ? titleLen > 50 ? 44 : 56
+      : titleLen > 35 ? 40 : 52;
+  const dateFs = isStory ? 130 : isSquare ? 84 : 76;
+  const dayFs = isStory ? 38 : isSquare ? 26 : 26;
+  const timeFs = isStory ? 56 : isSquare ? 40 : 40;
+  const padX = isStory ? 90 : isSquare ? 80 : 90;
+  const qrSize = isStory ? 280 : isSquare ? 180 : 180;
+  const headerFs = isStory ? 26 : 20;
+  const locFs = isStory ? 34 : 24;
+  const footerFs = isStory ? 24 : 20;
+  const titleMaxLen = isStory ? 130 : 110;
+  const locMaxLen = isStory ? 90 : 70;
+
+  const titleClamped = title.length > titleMaxLen ? title.slice(0, titleMaxLen - 3) + "…" : title;
+  const locClamped =
+    locationText.length > locMaxLen ? locationText.slice(0, locMaxLen - 3) + "…" : locationText;
+
+  // QR — Farbe an Theme anpassen für transparent-Variante
+  const qrDark = isTransparent && !isLight ? "#0a2011" : "#0a2011";
+  const qrLight = "#ffffff";
+  // QR neu rendern mit Theme-Farben falls nötig (default-Theme nutzt schon dark text)
+  const qrPngBufThemed = await qrToBuffer(eventUrl, {
     errorCorrectionLevel: "M",
     margin: 1,
     scale: 8,
-    color: { dark: "#0a2011ff", light: "#ffffffff" },
+    color: { dark: `${qrDark}ff`, light: `${qrLight}ff` },
   });
-  const qrDataUrl = `data:image/png;base64,${qrPngBuf.toString("base64")}`;
+  const qrDataUrlThemed = `data:image/png;base64,${qrPngBufThemed.toString("base64")}`;
 
-  const square = formatParam === "square";
-  const titleFs = square ? 56 : 52;
-  const dateFs = square ? 84 : 76;
-  const padX = square ? 80 : 90;
-  const qrSize = square ? 220 : 180;
-  const titleClamped = title.length > 110 ? title.slice(0, 107) + "…" : title;
-  const locClamped =
-    locationText.length > 70 ? locationText.slice(0, 67) + "…" : locationText;
-
-  const pinSvg = `<svg width="30" height="30" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M12 22s7-7.58 7-13a7 7 0 1 0-14 0c0 5.42 7 13 7 13z" fill="#7fb58a"/><circle cx="12" cy="9" r="2.5" fill="#0a2011"/></svg>`;
+  // Pin-Icon Theme-aware
+  const pinFill = isTransparent ? (isLight ? "#ffffff" : "#1a4d28") : "#7fb58a";
+  const pinDot = isTransparent ? (isLight ? "#0a2011" : "#ffffff") : "#0a2011";
+  const pinSvg = `<svg width="30" height="30" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M12 22s7-7.58 7-13a7 7 0 1 0-14 0c0 5.42 7 13 7 13z" fill="${pinFill}"/><circle cx="12" cy="9" r="2.5" fill="${pinDot}"/></svg>`;
   const pinDataUrl = `data:image/svg+xml;base64,${Buffer.from(pinSvg).toString("base64")}`;
 
-  const template = `
-    <div style="display:flex;flex-direction:column;width:${w}px;height:${h}px;background:linear-gradient(135deg,#0a2011 0%,#12361c 55%,#1a4d28 100%);color:#f0f5f1;padding:${padX}px;font-family:Inter;position:relative;">
-      <div style="display:flex;justify-content:space-between;align-items:center;font-size:20px;letter-spacing:0.18em;font-weight:600;color:#7fb58a;text-transform:uppercase;">
-        <div style="display:flex;align-items:center;">Windwiderstand Thüringen</div>
-        <div style="display:flex;align-items:center;color:#b3d1b9;">Termin</div>
-      </div>
+  // Clock-Icon Theme-aware — gleiche Akzent-Farbe wie Pin
+  const clockStroke = pinFill;
+  const clockSvg = `<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" fill="none" stroke="${clockStroke}" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="9"/><polyline points="12 7 12 12 15.5 14"/></svg>`;
+  const clockDataUrl = `data:image/svg+xml;base64,${Buffer.from(clockSvg).toString("base64")}`;
+  const clockSize = isStory ? 40 : 30;
 
-      <div style="display:flex;margin-top:${square ? 48 : 24}px;flex:1;gap:40px;">
-        <div style="display:flex;flex-direction:column;flex:1;min-width:0;">
-          <div style="display:flex;font-size:26px;color:#b3d1b9;font-weight:500;text-transform:capitalize;margin-bottom:6px;">${day}</div>
-          <div style="display:flex;align-items:baseline;flex-wrap:wrap;">
-            <div style="display:flex;font-size:${dateFs}px;font-weight:700;color:#ffffff;letter-spacing:-0.02em;line-height:1;">${date}</div>
-            ${time ? `<div style="display:flex;font-size:40px;font-weight:600;color:#d9e8dc;margin-left:24px;line-height:1;">${time} Uhr</div>` : ""}
-          </div>
+  // Logo als data-URL, gefärbt im Theme-Farbton.
+  const logoColor = palette.headerLabel;
+  const logoDataUrl = logoSvg
+    ? `data:image/svg+xml;base64,${Buffer.from(colorizeLogo(logoSvg, logoColor)).toString("base64")}`
+    : null;
+  const logoH = isStory ? 60 : isSquare ? 44 : 36;
 
-          <div style="display:flex;font-size:${titleFs}px;font-weight:700;color:#ffffff;line-height:1.15;margin-top:${square ? 40 : 26}px;letter-spacing:-0.015em;">${escapeHtml(titleClamped)}</div>
-        </div>
+  // Status-Pill (rechts neben "TERMIN"): farbiger Hintergrund, weiße Schrift
+  const statusPill = statusInfo
+    ? `<div style="display:flex;align-items:center;background:${statusInfo.color};color:#ffffff;padding:6px 14px;border-radius:999px;font-size:${headerFs - 4}px;letter-spacing:0.12em;font-weight:700;text-transform:uppercase;">${escapeHtml(statusInfo.label)}</div>`
+    : `<div style="display:flex;align-items:center;color:${palette.textDim};">Termin</div>`;
 
-        <div style="display:flex;flex-direction:column;align-items:center;gap:8px;">
-          <div style="display:flex;background:#ffffff;padding:14px;border-radius:12px;">
-            <img src="${qrDataUrl}" style="width:${qrSize}px;height:${qrSize}px;" />
-          </div>
-          <div style="display:flex;font-size:16px;color:#b3d1b9;font-weight:500;letter-spacing:0.05em;">Mehr Infos</div>
-        </div>
-      </div>
+  const brandBlock = logoDataUrl
+    ? `<div style="display:flex;align-items:center;"><img src="${logoDataUrl}" width="${logoH}" height="${logoH}" style="width:${logoH}px;height:${logoH}px;" /><div style="display:flex;margin-left:14px;">Windwiderstand Thüringen</div></div>`
+    : `<div style="display:flex;">Windwiderstand Thüringen</div>`;
 
+  const headerRow = `
+    <div style="display:flex;justify-content:space-between;align-items:center;font-size:${headerFs}px;letter-spacing:0.18em;font-weight:600;color:${palette.headerLabel};text-transform:uppercase;">
+      ${brandBlock}
+      ${statusPill}
+    </div>
+  `;
+
+  const datumBlock = `
+    <div style="display:flex;flex-direction:column;">
+      <div style="display:flex;font-size:${dayFs}px;color:${palette.textDim};font-weight:500;text-transform:capitalize;margin-bottom:6px;">${day}</div>
+      <div style="display:flex;font-size:${dateFs}px;font-weight:700;color:${palette.text};letter-spacing:-0.02em;line-height:1;">${date}</div>
+      ${time ? `<div style="display:flex;align-items:center;gap:10px;font-size:${timeFs}px;font-weight:600;color:${palette.textMute};margin-top:${isStory ? 14 : 8}px;line-height:1;"><img src="${clockDataUrl}" style="width:${clockSize}px;height:${clockSize}px;" /><span style="display:flex;">${time.trim()} Uhr</span></div>` : ""}
+    </div>
+  `;
+
+  // Description-Snippet: nur bei Square + Story (OG zu wenig vertikaler Platz)
+  const showDesc = isSquare || isStory;
+  const descMaxLen = isStory ? 200 : 140;
+  const descClamped = showDesc
+    ? (descSnippet.length > descMaxLen ? descSnippet.slice(0, descMaxLen - 3) + "…" : descSnippet)
+    : "";
+  const descFs = isStory ? 30 : 24;
+
+  const titleBlock = `
+    <div style="display:flex;flex-direction:column;margin-top:${isStory ? 56 : isSquare ? 40 : 26}px;">
+      <div style="display:flex;font-size:${titleFs}px;font-weight:700;color:${palette.text};line-height:1.15;letter-spacing:-0.015em;">${escapeHtml(titleClamped)}</div>
       ${
-        locClamped
-          ? `<div style="display:flex;align-items:center;font-size:24px;color:#d9e8dc;font-weight:500;margin-bottom:24px;gap:12px;"><img src="${pinDataUrl}" style="width:28px;height:28px;" /><div style="display:flex;">${escapeHtml(locClamped)}</div></div>`
+        descClamped
+          ? `<div style="display:flex;font-size:${descFs}px;font-weight:400;color:${palette.textMute};line-height:1.35;margin-top:${isStory ? 24 : 14}px;">${escapeHtml(descClamped)}</div>`
           : ""
       }
+    </div>
+  `;
 
-      <div style="display:flex;justify-content:space-between;align-items:center;font-size:20px;color:#7fb58a;border-top:1px solid #1a4d28;padding-top:18px;">
+  // OG bleibt mit rechter Spalte (align-items:center). Square/Story stack linksbündig.
+  const qrAlign = verticalStack ? "flex-start" : "center";
+  const qrBlock = `
+    <div style="display:flex;flex-direction:column;align-items:${qrAlign};gap:8px;">
+      <div style="display:flex;background:${palette.qrBoxBg};padding:14px;border-radius:12px;">
+        <img src="${qrDataUrlThemed}" style="width:${qrSize}px;height:${qrSize}px;" />
+      </div>
+      <div style="display:flex;font-size:${isStory ? 22 : 16}px;color:${palette.textDim};font-weight:500;letter-spacing:0.05em;">Mehr Infos</div>
+    </div>
+  `;
+
+  const locationBlock = locClamped
+    ? `<div style="display:flex;align-items:flex-start;font-size:${locFs}px;color:${palette.textMute};font-weight:500;line-height:1.25;margin-top:${isStory ? 36 : 28}px;margin-bottom:${isStory ? 40 : 24}px;gap:12px;flex-shrink:0;"><img src="${pinDataUrl}" style="width:${isStory ? 36 : 28}px;height:${isStory ? 36 : 28}px;margin-top:${isStory ? 4 : 2}px;flex-shrink:0;" /><div style="display:flex;">${escapeHtml(locClamped)}</div></div>`
+    : "";
+
+  const footerBlock = `
+    <div style="display:flex;justify-content:space-between;align-items:center;font-size:${footerFs}px;color:${palette.accent};border-top:1px solid ${palette.footerSep};padding-top:${isStory ? 24 : 18}px;">
       <div style="display:flex;align-items:center;font-weight:600;">windwiderstand.de</div>
       <div style="display:flex;align-items:center;font-weight:500;letter-spacing:0.04em;">Mit Vernunft in die Zukunft</div>
     </div>
+  `;
+
+  // Story + Square: vertikales Stack-Layout (QR unter Text). OG: 2-Spalten (Text + QR rechts).
+  const mainArea = verticalStack
+    ? `
+      <div style="display:flex;flex-direction:column;margin-top:${isStory ? 60 : 40}px;flex:1;">
+        ${datumBlock}
+        ${titleBlock}
+      </div>
+      <div style="display:flex;justify-content:flex-start;margin-top:${isStory ? 40 : 28}px;margin-bottom:${isStory ? 40 : 24}px;">
+        ${qrBlock}
+      </div>
+    `
+    : `
+      <div style="display:flex;margin-top:24px;flex:1;gap:40px;">
+        <div style="display:flex;flex-direction:column;flex:1;min-width:0;">
+          ${datumBlock}
+          ${titleBlock}
+        </div>
+        ${qrBlock}
+      </div>
+    `;
+
+  const template = `
+    <div style="display:flex;flex-direction:column;width:${w}px;height:${h}px;background:${palette.bg};color:${palette.text};padding:${padX}px;font-family:Inter;position:relative;">
+      ${headerRow}
+      ${mainArea}
+      ${locationBlock}
+      ${footerBlock}
     </div>
   `;
 
@@ -157,7 +407,10 @@ export const GET: RequestHandler = async ({ params, url, setHeaders }) => {
     ],
   });
 
-  const resvg = new Resvg(svg, { fitTo: { mode: "width", value: w } });
+  const resvg = new Resvg(svg, {
+    fitTo: { mode: "width", value: w },
+    background: isTransparent ? "rgba(0,0,0,0)" : undefined,
+  });
   const png = resvg.render().asPng();
   const pngBuf = Buffer.from(png);
   cache.set(cacheKey, { png: pngBuf, ts: now });

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

@@ -0,0 +1,90 @@
+import type { PageServerLoad } from "./$types";
+import { error } from "@sveltejs/kit";
+import { getCalendarItemBySlug } from "$lib/cms";
+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).
+ *
+ * Crawler bekommen die Meta-Tags zu sehen, normale Browser werden via
+ * Client-Side-Redirect (im +page.svelte) sofort zum Kalender geschickt.
+ */
+export const load: PageServerLoad = async ({ params, setHeaders }) => {
+  const slug = params.slug;
+  const rawItem = await getCalendarItemBySlug(slug, { locale: "de" });
+  if (!rawItem) throw error(404, "Termin nicht gefunden");
+  const item = rawItem as typeof rawItem & {
+    location?: unknown;
+    description?: string;
+  };
+
+  const siteBaseUrl = (env.PUBLIC_SITE_URL || "").replace(/\/$/, "");
+  const title = (item.title ?? "Termin").trim();
+  const terminZeit = item.terminZeit;
+  const dateLabel = terminZeit
+    ? new Date(terminZeit).toLocaleDateString("de-DE", {
+        weekday: "long",
+        day: "2-digit",
+        month: "long",
+        year: "numeric",
+      })
+    : "";
+  const timeLabel =
+    terminZeit && !/T00:00:00/.test(terminZeit)
+      ? new Date(terminZeit).toLocaleTimeString("de-DE", {
+          hour: "2-digit",
+          minute: "2-digit",
+        }) + " Uhr"
+      : "";
+
+  const locationText =
+    typeof item.location === "object" && item.location !== null
+      ? (((item.location as { text?: string }).text ?? "").trim() || null)
+      : null;
+
+  // Plain-Text-Snippet aus Description (Markdown → Text, ~200 Zeichen)
+  let descriptionPlain = "";
+  if (item.description) {
+    const html = marked.parse(item.description) as string;
+    descriptionPlain = html
+      .replace(/<[^>]+>/g, " ")
+      .replace(/\s+/g, " ")
+      .trim();
+  }
+
+  const seoDescription = [
+    dateLabel + (timeLabel ? `, ${timeLabel}` : ""),
+    locationText,
+    descriptionPlain ? descriptionPlain.slice(0, 200) : null,
+  ]
+    .filter(Boolean)
+    .join(" · ");
+
+  const socialImage = `${siteBaseUrl}/api/social/calendar/${encodeURIComponent(slug)}?format=og`;
+  const calendarUrl = `/kalender/#event-${slug}`;
+
+  // CDN/Browser dürfen die SEO-Antwort cachen, da Crawler sie selten neu holen.
+  setHeaders({
+    "cache-control": "public, s-maxage=300, stale-while-revalidate=3600",
+  });
+
+  return {
+    seoTitle: `${title} – Windwiderstand Thüringen`,
+    seoDescription,
+    socialImage,
+    ogType: "article" as const,
+    calendarUrl,
+    item: {
+      slug,
+      title,
+      dateLabel,
+      timeLabel,
+      locationText,
+      descriptionPlain: descriptionPlain.slice(0, 400),
+    },
+  };
+};

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

@@ -0,0 +1,42 @@
+<script lang="ts">
+  import { onMount } from "svelte";
+  import type { PageData } from "./$types";
+
+  let { data }: { data: PageData } = $props();
+
+  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);
+  });
+</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>
+
+<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}` : ""}
+    </p>
+  {/if}
+  {#if data.item.locationText}
+    <p class="mt-1 text-stein-500">📍 {data.item.locationText}</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>
+  <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"
+  >
+    Im Kalender anzeigen
+  </a>
+</div>