Add booking flow, business hours, and dark mode support

Features:
- Complete multi-step booking flow with service selection, date/time picker,
  auth (login/signup with email verification), payment, and confirmation
- Business hours settings page for defining when business is open
- TimeBlock purpose field (BUSINESS_HOURS, CLOSURE, UNAVAILABLE)
- Service resource assignment with prep/takedown time buffers
- Availability checking respects business hours and service buffers
- Customer registration via email verification code

UI/UX:
- Full dark mode support for all booking components
- Separate first/last name fields in signup form
- Back buttons on each wizard step
- Removed auto-redirect from confirmation page

API:
- Public endpoints for services, availability, business hours
- Customer verification and registration endpoints
- Tenant lookup from X-Business-Subdomain header

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/hooks/useSites.ts

@@ -46,6 +46,31 @@ export const useUpdatePage = () => {
   });
 };
 
+export const useCreatePage = () => {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: async (data: { title: string; slug?: string; is_home?: boolean }) => {
+      const response = await api.post('/sites/me/pages/', data);
+      return response.data;
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['pages'] });
+    },
+  });
+};
+
+export const useDeletePage = () => {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: async (id: string) => {
+      await api.delete(`/sites/me/pages/${id}/`);
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['pages'] });
+    },
+  });
+};
+
 export const usePublicPage = () => {
   return useQuery({
     queryKey: ['publicPage'],