feat: Implement frontend for business owners' support ticket system

frontend/src/hooks/useUsers.ts

@@ -0,0 +1,17 @@
+import { useQuery } from '@tanstack/react-query';
+import { apiClient } from '../api/client';
+import { User } from '../types';
+
+/**
+ * Hook to fetch all users (staff, owners, customers) for the current business.
+ * This can be filtered/refined later based on specific needs (e.g., only staff).
+ */
+export const useUsers = () => {
+  return useQuery<User[]>({
+    queryKey: ['businessUsers'],
+    queryFn: async () => {
+      const response = await apiClient.get('/api/business/users/');
+      return response.data;
+    },
+  });
+};