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)/konto/layout.tsx

@@ -1,11 +1,15 @@
+import type { Metadata } from "next";
 import type { ReactNode } from "react";
 import Link from "next/link";
 import { redirect } from "next/navigation";
 import { Container } from "@/components/Section";
 import { LogoutButton } from "@/components/auth/LogoutButton";
+import { ResendVerificationButton } from "@/components/auth/ResendVerificationButton";
 import { getCurrentCustomer } from "@/lib/auth/customer";
 
 export const dynamic = "force-dynamic";
+// Applies to every /konto/* page at once — private account area, never indexable.
+export const metadata: Metadata = { robots: { index: false, follow: false } };
 
 const navItems = [
   { title: "Übersicht", href: "/konto" },
@@ -25,6 +29,15 @@ export default async function KontoLayout({ children }: { children: ReactNode })
           <p className="text-xs font-medium uppercase tracking-[0.18em] text-anouma-plum/70">Mein Konto</p>
           <h1 className="mt-2 font-serif text-3xl font-medium text-anouma-plum">Hallo, {customer.name}</h1>
         </div>
+        {!customer.emailVerified && (
+          <div className="mb-8 rounded-2xl bg-anouma-cream-beige p-5">
+            <p className="text-sm font-medium text-anouma-plum">Bitte bestätige zuerst deine E-Mail-Adresse.</p>
+            <p className="mt-1 text-sm text-anouma-plum/80">
+              Erst danach kannst du Termine anfragen. Prüfe dein Postfach oder fordere unten eine neue E-Mail an.
+            </p>
+            <ResendVerificationButton variant="session" className="mt-3" />
+          </div>
+        )}
         <div className="grid gap-10 lg:grid-cols-[220px_1fr]">
           <nav aria-label="Konto-Navigation" className="flex gap-2 overflow-x-auto lg:flex-col lg:gap-1">
             {navItems.map((item) => (