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)/auth/verify-email/[token]/page.tsx

@@ -0,0 +1,54 @@
+import type { Metadata } from "next";
+import Link from "next/link";
+import { PageHeader } from "@/components/PageHeader";
+import { Section } from "@/components/Section";
+import { ResendVerificationButton } from "@/components/auth/ResendVerificationButton";
+import { verifyEmailToken } from "@/lib/auth/verifyEmailToken";
+
+export const dynamic = "force-dynamic";
+
+export const metadata: Metadata = { title: "E-Mail bestätigen", robots: { index: false, follow: false } };
+
+type Args = { params: Promise<{ token: string }> };
+
+export default async function VerifyEmailPage({ params }: Args) {
+  const { token } = await params;
+  const verified = await verifyEmailToken(token);
+
+  return (
+    <>
+      <PageHeader
+        eyebrow="Konto"
+        title={verified ? "E-Mail-Adresse bestätigt" : "Bestätigung fehlgeschlagen"}
+        crumbs={[{ title: "E-Mail bestätigen" }]}
+      />
+      <Section tone="plain">
+        <div className="mx-auto max-w-md text-center">
+          {verified ? (
+            <>
+              <p className="text-base leading-relaxed text-anouma-plum">Dein Konto ist jetzt aktiviert.</p>
+              <Link
+                href="/konto"
+                className="mt-6 inline-flex rounded-full bg-anouma-mauve-dark px-7 py-3.5 text-sm font-medium text-white transition-colors hover:bg-anouma-plum"
+              >
+                Zum Konto
+              </Link>
+            </>
+          ) : (
+            <>
+              <p className="text-base leading-relaxed text-anouma-plum">
+                Dieser Verifizierungslink ist ungültig oder abgelaufen.
+              </p>
+              <div className="mt-6 flex flex-col items-center gap-4">
+                <ResendVerificationButton variant="email-prompt" triggerLabel="Neuen Link anfordern" />
+                <Link href="/login" className="text-sm font-medium text-anouma-mauve-dark underline underline-offset-4">
+                  Zur Anmeldung
+                </Link>
+              </div>
+            </>
+          )}
+        </div>
+      </Section>
+    </>
+  );
+}