Add registration form and complete frontend integration

frontend/src/app/events/[eventId]/register/page.tsx

@@ -0,0 +1,19 @@
+import { RegistrationForm } from '@/components/registration-form';
+
+interface RegisterPageProps {
+  params: Promise<{
+    eventId: string;
+  }>;
+}
+
+export default async function RegisterPage({ params }: RegisterPageProps) {
+  const { eventId } = await params;
+  
+  return (
+    <div className="min-h-screen bg-gray-50 py-8">
+      <div className="max-w-4xl mx-auto px-4">
+        <RegistrationForm eventId={eventId} eventName="Event" />
+      </div>
+    </div>
+  );
+}

frontend/src/components/registration-form.tsx

@@ -0,0 +1,83 @@
+'use client';
+
+import { useState } from 'react';
+import { api } from '@/lib/api';
+import { useRouter } from 'next/navigation';
+
+interface RegistrationFormProps {
+  eventId: string;
+  eventName: string;
+}
+
+export function RegistrationForm({ eventId, eventName }: RegistrationFormProps) {
+  const [category, setCategory] = useState('');
+  const [emergencyContact, setEmergencyContact] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const router = useRouter();
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setError(null);
+    setIsSubmitting(true);
+
+    try {
+      await api.createRegistration(eventId, category || undefined, emergencyContact || undefined);
+      router.push('/registrations');
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Registration failed');
+    } finally {
+      setIsSubmitting(false);
+    }
+  };
+
+  return (
+    <div className="max-w-md mx-auto">
+      {error && (
+        <div className="mb-4 p-3 bg-red-100 border border-red-400 text-red-700 rounded">
+          {error}
+        </div>
+      )}
+
+      <form onSubmit={handleSubmit} className="bg-white rounded-lg shadow-md p-6 space-y-4">
+        <h2 className="text-xl font-bold mb-4">Register for {eventName}</h2>
+        
+        <div>
+          <label htmlFor="category" className="block text-sm font-medium text-gray-700 mb-1">
+            Category (optional)
+          </label>
+          <input
+            id="category"
+            type="text"
+            value={category}
+            onChange={(e) => setCategory(e.target.value)}
+            placeholder="e.g., Elite, Amateur, Junior"
+            className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+          />
+        </div>
+
+        <div>
+          <label htmlFor="emergencyContact" className="block text-sm font-medium text-gray-700 mb-1">
+            Emergency Contact
+          </label>
+          <input
+            id="emergencyContact"
+            type="text"
+            value={emergencyContact}
+            onChange={(e) => setEmergencyContact(e.target.value)}
+            placeholder="Name and phone number"
+            className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500"
+          />
+        </div>
+
+        <button
+          type="submit"
+          disabled={isSubmitting}
+          className="w-full py-2 px-4 bg-green-600 text-white rounded-md hover:bg-green-700 disabled:bg-gray-400"
+        >
+          {isSubmitting ? 'Registering...' : 'Complete Registration'}
+        </button>
+      </form>
+    </div>
+  );
+}