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/utils/cookies.ts

@@ -0,0 +1,46 @@
+/**
+ * Cookie utilities for cross-subdomain token storage
+ */
+
+/**
+ * Set a cookie with domain attribute for cross-subdomain access
+ * Uses .lvh.me for local development (lvh.me supports subdomains, unlike localhost)
+ */
+export const setCookie = (name: string, value: string, days: number = 7) => {
+  const expires = new Date();
+  expires.setTime(expires.getTime() + days * 24 * 60 * 60 * 1000);
+
+  // Set cookie with domain=.lvh.me for local dev, accessible across all subdomains
+  // For localhost, don't set domain attribute - let it default to current host
+  const hostname = window.location.hostname;
+  const isLocalhost = hostname === 'localhost' || hostname === '127.0.0.1';
+  const domainAttr = hostname.includes('lvh.me') ? `;domain=.lvh.me` : isLocalhost ? '' : `;domain=${hostname}`;
+
+  document.cookie = `${name}=${value};expires=${expires.toUTCString()}${domainAttr};path=/;SameSite=Lax`;
+};
+
+/**
+ * Get a cookie value by name
+ */
+export const getCookie = (name: string): string | null => {
+  const nameEQ = name + '=';
+  const ca = document.cookie.split(';');
+
+  for (let i = 0; i < ca.length; i++) {
+    let c = ca[i];
+    while (c.charAt(0) === ' ') c = c.substring(1, c.length);
+    if (c.indexOf(nameEQ) === 0) return c.substring(nameEQ.length, c.length);
+  }
+
+  return null;
+};
+
+/**
+ * Delete a cookie
+ */
+export const deleteCookie = (name: string) => {
+  const hostname = window.location.hostname;
+  const isLocalhost = hostname === 'localhost' || hostname === '127.0.0.1';
+  const domainAttr = hostname.includes('lvh.me') ? `;domain=.lvh.me` : isLocalhost ? '' : `;domain=${hostname}`;
+  document.cookie = `${name}=;expires=Thu, 01 Jan 1970 00:00:00 UTC${domainAttr};path=/;`;
+};