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/hooks/useBusinessOAuthCredentials.ts

@@ -0,0 +1,32 @@
+/**
+ * React Query hooks for managing business OAuth credentials
+ */
+
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { getBusinessOAuthCredentials, updateBusinessOAuthCredentials } from '../api/business';
+import { BusinessOAuthCredentials } from '../types';
+
+/**
+ * Fetch business OAuth credentials
+ */
+export const useBusinessOAuthCredentials = () => {
+  return useQuery({
+    queryKey: ['businessOAuthCredentials'],
+    queryFn: getBusinessOAuthCredentials,
+  });
+};
+
+/**
+ * Update business OAuth credentials
+ */
+export const useUpdateBusinessOAuthCredentials = () => {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (credentials: Partial<BusinessOAuthCredentials>) =>
+      updateBusinessOAuthCredentials(credentials),
+    onSuccess: (data) => {
+      queryClient.setQueryData(['businessOAuthCredentials'], data);
+    },
+  });
+};