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>

components/auth/LoginForm.tsx

@@ -2,6 +2,7 @@
 
 import { useState, type FormEvent } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
+import { ResendVerificationButton } from "./ResendVerificationButton";
 
 const fieldClass =
   "w-full rounded-2xl border border-anouma-taupe/30 bg-white px-5 py-3.5 text-base text-anouma-plum placeholder:text-anouma-plum/50 focus:border-anouma-mauve-dark focus:outline-none";
@@ -67,6 +68,7 @@ export function LoginForm() {
       >
         {loading ? "Wird geprüft …" : "Anmelden"}
       </button>
+      <ResendVerificationButton variant="email-prompt" className="pt-1" />
     </form>
   );
 }