Validate Q1b and Q2 before proceeding to Step 2

Users could skip Q1b (customer type) and Q2 (voice delivery) and
hit Next — the wizard silently defaulted to retail. Now validates:
- Q1b must be answered (customer type selected)
- Q2 must be answered if voice is checked and not wholesale-only

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

site/public/order/fcc-carrier-registration/index.html

@@ -514,6 +514,8 @@ select:focus,input:focus{outline:none;border-color:#1e3a5f;box-shadow:0 0 0 2px
   // ── Step 1 → 2: Derive registrations ──
   document.getElementById('btn-next-1').addEventListener('click', function() {
     if (wizard.serviceTypes.length === 0) { alert('Please select at least one service type.'); return; }
+    if (!document.querySelector('[data-custtype].selected')) { alert('Please select who your customers are (retail, wholesale, or both).'); return; }
+    if (wizard.serviceTypes.indexOf('voice') >= 0 && wizard.customerType !== 'wholesale' && !wizard.voiceDelivery) { alert('Please select how you will deliver voice service.'); return; }
 
     var hasVoice = wizard.serviceTypes.indexOf('voice') >= 0;
     var hasBroadband = wizard.serviceTypes.indexOf('broadband') >= 0;