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/config.ts

@@ -0,0 +1,59 @@
+/**
+ * API Configuration
+ * Centralized configuration for API endpoints and settings
+ */
+
+// Determine API base URL based on environment
+const getApiBaseUrl = (): string => {
+  // In production, this would be set via environment variable
+  if (import.meta.env.VITE_API_URL) {
+    return import.meta.env.VITE_API_URL;
+  }
+
+  // Development: use api subdomain
+  return 'http://api.lvh.me:8000';
+};
+
+export const API_BASE_URL = getApiBaseUrl();
+
+/**
+ * Extract subdomain from current hostname
+ * Returns null if on root domain or invalid subdomain
+ */
+export const getSubdomain = (): string | null => {
+  const hostname = window.location.hostname;
+  const parts = hostname.split('.');
+
+  // lvh.me without subdomain (root domain) - no business context
+  if (hostname === 'lvh.me') {
+    return null;
+  }
+
+  // Has subdomain
+  if (parts.length > 1) {
+    const subdomain = parts[0];
+    // Exclude special subdomains
+    if (['www', 'api', 'platform'].includes(subdomain)) {
+      return subdomain === 'platform' ? null : subdomain;
+    }
+    return subdomain;
+  }
+
+  return null;
+};
+
+/**
+ * Check if current page is platform site
+ */
+export const isPlatformSite = (): boolean => {
+  const hostname = window.location.hostname;
+  return hostname.startsWith('platform.');
+};
+
+/**
+ * Check if current page is business site
+ */
+export const isBusinessSite = (): boolean => {
+  const subdomain = getSubdomain();
+  return subdomain !== null && subdomain !== 'platform';
+};