Refactor monolithic modules and harden booking, email, and auth infrastructure.

Split oversized frontend API client, email service, and admin/booking pages into focused modules while preserving import surfaces, and add Redis-backed queues, stale booking cleanup, stronger auth, and scale deployment configs.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/lib/api/legalPages.ts

@@ -0,0 +1,34 @@
+import { fetchApi } from './client';
+import type { LegalPage, LegalPagePublic, LegalPageListItem } from './types';
+
+export const legalPagesApi = {
+  // Public endpoints
+  getAll: (locale?: string) =>
+    fetchApi<{ pages: LegalPageListItem[] }>(`/api/legal-pages${locale ? `?locale=${locale}` : ''}`),
+
+  getBySlug: (slug: string, locale?: string) =>
+    fetchApi<{ page: LegalPagePublic }>(`/api/legal-pages/${slug}${locale ? `?locale=${locale}` : ''}`),
+
+  // Admin endpoints
+  getAdminList: () =>
+    fetchApi<{ pages: LegalPage[] }>('/api/legal-pages/admin/list'),
+
+  getAdminPage: (slug: string) =>
+    fetchApi<{ page: LegalPage }>(`/api/legal-pages/admin/${slug}`),
+
+  update: (slug: string, data: {
+    contentMarkdown?: string;
+    contentMarkdownEs?: string;
+    title?: string;
+    titleEs?: string;
+  }) =>
+    fetchApi<{ page: LegalPage; message: string }>(`/api/legal-pages/admin/${slug}`, {
+      method: 'PUT',
+      body: JSON.stringify(data),
+    }),
+
+  seed: () =>
+    fetchApi<{ message: string; seeded: number; pages?: string[] }>('/api/legal-pages/admin/seed', {
+      method: 'POST',
+    }),
+};