Wire Formspree endpoint and switch form to FormData submission

Sets FORM_ENDPOINT to the live Formspree URL and changes the fetch body
from JSON.stringify to a FormData object so Formspree parses fields
correctly. Drops the now-invalid Content-Type: application/json header
while keeping Accept: application/json. _subject is appended directly to
the FormData. Branded success state and all other page content unchanged.

https://claude.ai/code/session_01UvxyYfFKojskoSWTfeZ7Vj

orders.html

@@ -250,7 +250,7 @@ html[lang="ko"] em { font-style: normal; color: var(--gold); font-weight: 500; }
 // 3. Replace the empty string below with that URL.
 // Until this is set, the form submits to a friendly "not configured" message.
 // ────────────────────────────────────────────────────────────────
-const FORM_ENDPOINT = '';
+const FORM_ENDPOINT = 'https://formspree.io/f/xojbbdzv';
 
 (function() {
   const form = document.getElementById('orderForm');
@@ -286,17 +286,15 @@ const FORM_ENDPOINT = '';
     }
 
     const data = new FormData(form);
-    const payload = {};
-    data.forEach((v, k) => { payload[k] = v; });
-    payload._subject = 'New order — ' + (payload.name || 'unknown') + ' · ' + (payload.fulfillment || '');
+    data.append('_subject', 'New order — ' + (data.get('name') || 'unknown') + ' · ' + (data.get('fulfillment') || ''));
 
     submitBtn.disabled = true;
     submitBtn.textContent = 'Sending…';
 
     fetch(FORM_ENDPOINT, {
       method: 'POST',
-      headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
-      body: JSON.stringify(payload)
+      headers: { 'Accept': 'application/json' },
+      body: data
     }).then(function(r) {
       if (!r.ok) throw new Error('HTTP ' + r.status);
       return r.json().catch(() => ({}));