Initial commit: SmoothSchedule multi-tenant scheduling platform

This commit includes:
- Django backend with multi-tenancy (django-tenants)
- React + TypeScript frontend with Vite
- Platform administration API with role-based access control
- Authentication system with token-based auth
- Quick login dev tools for testing different user roles
- CORS and CSRF configuration for local development
- Docker development environment setup

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

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

frontend/src/api/customDomains.ts

@@ -0,0 +1,51 @@
+/**
+ * Custom Domains API - Manage custom domains for businesses
+ */
+
+import apiClient from './client';
+import { CustomDomain } from '../types';
+
+/**
+ * Get all custom domains for the current business
+ */
+export const getCustomDomains = async (): Promise<CustomDomain[]> => {
+  const response = await apiClient.get<CustomDomain[]>('/api/business/domains/');
+  return response.data;
+};
+
+/**
+ * Add a new custom domain
+ */
+export const addCustomDomain = async (domain: string): Promise<CustomDomain> => {
+  const response = await apiClient.post<CustomDomain>('/api/business/domains/', {
+    domain: domain.toLowerCase().trim(),
+  });
+  return response.data;
+};
+
+/**
+ * Delete a custom domain
+ */
+export const deleteCustomDomain = async (domainId: number): Promise<void> => {
+  await apiClient.delete(`/api/business/domains/${domainId}/`);
+};
+
+/**
+ * Verify a custom domain by checking DNS
+ */
+export const verifyCustomDomain = async (domainId: number): Promise<{ verified: boolean; message: string }> => {
+  const response = await apiClient.post<{ verified: boolean; message: string }>(
+    `/api/business/domains/${domainId}/verify/`
+  );
+  return response.data;
+};
+
+/**
+ * Set a custom domain as the primary domain
+ */
+export const setPrimaryDomain = async (domainId: number): Promise<CustomDomain> => {
+  const response = await apiClient.post<CustomDomain>(
+    `/api/business/domains/${domainId}/set-primary/`
+  );
+  return response.data;
+};