Add explicit contact opt-in before Resend list signup

src/App.tsx

@@ -105,6 +105,7 @@ function AmazonMusicIcon() {
 function ContactForm() {
   const navigate = useNavigate()
   const [fields, setFields] = useState({ name: '', email: '', message: '' })
+  const [subscribe, setSubscribe] = useState(false)
   const [honey, setHoney] = useState('')
   const [status, setStatus] = useState<'idle' | 'submitting' | 'error'>('idle')
   const [errorMsg, setErrorMsg] = useState('')
@@ -121,7 +122,7 @@ function ContactForm() {
       const res = await fetch('/api/contact', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ ...fields, _honey: honey }),
+        body: JSON.stringify({ ...fields, subscribe, _honey: honey }),
       })
       if (!res.ok) {
         const data = await res.json().catch(() => ({}))
@@ -159,6 +160,14 @@ function ContactForm() {
         Message
         <textarea name="message" rows={6} required value={fields.message} onChange={handleChange} />
       </label>
+      <label className="contact-consent">
+        <input
+          type="checkbox"
+          checked={subscribe}
+          onChange={e => setSubscribe(e.target.checked)}
+        />
+        <span>Send me updates from Verse by Verse with Nate. I can unsubscribe anytime.</span>
+      </label>
       {status === 'error' && <p className="contact-error">{errorMsg}</p>}
       <button type="submit" className="btn-primary" disabled={status === 'submitting'}>
         {status === 'submitting' ? 'Sending…' : 'Send Message'}