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/admin/CalendarFeedPanel.module.css

@@ -0,0 +1,122 @@
+.panel {
+  margin-top: 28px;
+  border: 1px solid #e6e6e6;
+  border-radius: 12px;
+  padding: 20px 22px;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+}
+
+.heading {
+  font-size: 16px;
+  font-weight: 600;
+  margin: 0 0 4px;
+  color: #1f1f1f;
+}
+
+.hint {
+  font-size: 13px;
+  color: #666;
+  margin: 0 0 14px;
+  line-height: 1.5;
+}
+
+.status {
+  font-size: 13px;
+  color: #555;
+  margin: 0 0 14px;
+}
+
+.button {
+  display: inline-flex;
+  align-items: center;
+  border: none;
+  border-radius: 999px;
+  background: #8b616d;
+  color: #fff;
+  font-size: 13px;
+  font-weight: 600;
+  padding: 9px 18px;
+  cursor: pointer;
+}
+.button:hover {
+  background: #66505f;
+}
+.button:disabled {
+  opacity: 0.6;
+  cursor: default;
+}
+
+.secondaryButton {
+  display: inline-flex;
+  align-items: center;
+  border-radius: 999px;
+  font-size: 13px;
+  font-weight: 600;
+  padding: 9px 18px;
+  cursor: pointer;
+  background: transparent;
+  color: #8b616d;
+  border: 1px solid #8b616d;
+}
+.secondaryButton:hover {
+  background: #f7f0f2;
+}
+.secondaryButton:disabled {
+  opacity: 0.6;
+  cursor: default;
+}
+
+.result {
+  margin-top: 16px;
+  border-radius: 10px;
+  background: #f7f4f1;
+  padding: 14px 16px;
+}
+
+.resultWarning {
+  font-size: 12px;
+  font-weight: 600;
+  color: #7a2020;
+  margin: 0 0 8px;
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+}
+
+.urlRow {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+}
+
+.urlInput {
+  flex: 1;
+  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
+  font-size: 12px;
+  padding: 8px 10px;
+  border-radius: 8px;
+  border: 1px solid #dcdcdc;
+  background: #fff;
+  color: #333;
+}
+
+.copied {
+  font-size: 12px;
+  color: #3a4f30;
+  margin: 8px 0 0;
+}
+
+.error {
+  font-size: 13px;
+  color: #7a2020;
+  margin-top: 10px;
+}
+
+.instructions {
+  margin-top: 18px;
+  font-size: 12px;
+  color: #777;
+  line-height: 1.6;
+}
+.instructions strong {
+  color: #444;
+}