Add email verification, personal calendar feed, and full SEO implementation

- Customer accounts now require email verification (hashed, single-use,
  time-limited tokens) before they can request/confirm bookings, with
  resend flows on login/account/booking widget and rate limiting.
- Admins get a private, rotatable iCalendar (ICS) subscription feed of
  their confirmed bookings and public events, timezone-correct for
  Europe/Berlin including DST, never exposing meeting passwords.
- Adds a full SEO layer: per-page canonical/OG/Twitter metadata with
  CMS-editable overrides and content-derived fallbacks, a dynamic
  sitemap.xml and robots.txt driven by real published content, JSON-LD
  (Organization/LocalBusiness, WebSite, WebPage, BreadcrumbList, Service,
  Event, BlogPosting) that never fabricates data, and a CMS-managed
  redirect table for changed slugs.
- Global ANOUMA-naming audit: the brand name is never used to label
  personal account/calendar areas anywhere in the app, CMS, or emails.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/(frontend)/impressionen/page.tsx

@@ -4,11 +4,17 @@ import { Section } from "@/components/Section";
 import { ImagePlaceholder } from "@/components/ImagePlaceholder";
 import { Reveal } from "@/components/Reveal";
 import type { ImageMood } from "@/lib/angebote";
+import { buildMetadata } from "@/lib/seo/metadata";
+import { getSiteUrl } from "@/lib/seo/config";
+import { JsonLd, webPageJsonLd } from "@/lib/seo/jsonld";
 
-export const metadata: Metadata = {
-  title: "Impressionen",
-  description: "Bildeindrücke aus der Arbeit von Anouma — Natur, Gemeinschaft und gemeinsame Räume.",
-};
+export const dynamic = "force-dynamic";
+
+const DESCRIPTION = "Bildeindrücke aus der Arbeit von Anouma — Natur, Gemeinschaft und gemeinsame Räume.";
+
+export async function generateMetadata(): Promise<Metadata> {
+  return buildMetadata({ title: "Impressionen", description: DESCRIPTION, path: "/impressionen" });
+}
 
 const gallery: { mood: ImageMood; label: string; span?: string }[] = [
   { mood: "moss", label: "Wald und Naturverbundenheit", span: "sm:row-span-2" },
@@ -21,9 +27,12 @@ const gallery: { mood: ImageMood; label: string; span?: string }[] = [
   { mood: "mauve", label: "Räume der Verbindung" },
 ];
 
-export default function ImpressionenPage() {
+export default async function ImpressionenPage() {
+  const siteUrl = await getSiteUrl();
+
   return (
     <>
+      <JsonLd data={webPageJsonLd({ name: "Impressionen", description: DESCRIPTION, url: `${siteUrl}/impressionen` })} />
       <PageHeader
         eyebrow="Impressionen"
         title="Einblicke in gemeinsame Räume"