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>

fields/seo.ts

@@ -0,0 +1,53 @@
+import type { Field } from "payload";
+
+/**
+ * Reusable, always-optional SEO field group — added to every public-facing
+ * collection/global. Never required: every consumer falls back to a
+ * sensible, automatically derived value when a field is left empty (see
+ * lib/seo/resolve.ts), per the "SEO fields are optional with fallbacks"
+ * requirement.
+ */
+export function seoFields(): Field {
+  return {
+    type: "collapsible",
+    label: "SEO",
+    admin: {
+      description: "Optional — wird automatisch aus dem Inhalt abgeleitet, wenn hier nichts eingetragen ist.",
+    },
+    fields: [
+      {
+        name: "seo",
+        type: "group",
+        label: "",
+        fields: [
+          {
+            name: "title",
+            type: "text",
+            label: "SEO Title",
+            maxLength: 70,
+            admin: { description: "Falls leer: automatisch aus dem Seitentitel erzeugt." },
+          },
+          {
+            name: "description",
+            type: "textarea",
+            label: "Meta Description",
+            maxLength: 300,
+            admin: { description: "Falls leer: automatisch aus dem Inhalt erzeugt (erste ~160 Zeichen)." },
+          },
+          {
+            name: "keywords",
+            type: "text",
+            label: "SEO Keywords (optional, kommagetrennt)",
+          },
+          {
+            name: "ogImage",
+            type: "upload",
+            relationTo: "media",
+            label: "Open Graph Bild",
+            admin: { description: "Falls leer: Hauptbild dieser Seite bzw. das Standard-Social-Bild aus den SEO-Einstellungen." },
+          },
+        ],
+      },
+    ],
+  };
+}