Update crypto checkout for out-of-stock refund scenarios and left-align QR code

- Add specific messaging for out-of-stock-refunded status (full refund, no fee)
- Add specific messaging for out-of-stock-no-refund status
- Add out-of-stock item to refund policy lists
- Left-align QR code instead of centering it

make_post_sell/templates/crypto_checkout.j2

@@ -11,9 +11,8 @@
     {% else %}
       {% set amount_fmt = '%.8f' % amount_crypto %}
     {% endif %}
-    <div style="text-align: center; margin: 16px 0;">
-      <div id="payment-qr" style="margin-bottom: 8px; display: inline-block;"></div>
-      <br>
+    <div style="margin: 16px 0;">
+      <div id="payment-qr" style="margin-bottom: 8px;"></div>
       <small style="color: #666;">Scan with wallet app</small>
     </div>
     
@@ -372,24 +371,36 @@
   <div style="background: #d1fae5; border: 1px solid #10b981; border-radius: 4px; padding: 15px; margin: 20px 0;">
     <p><strong>✓ Refund address configured</strong></p>
     <p style="font-family: monospace; background: #f0f0f0; padding: 8px; border-radius: 3px; word-break: break-all;">{{ refund_address }}</p>
+    {% if status == 'out-of-stock-refunded' %}
+    <p><strong>📦 Out of Stock - Full Refund Issued</strong></p>
+    <p>This item became unavailable after your payment. You received a <strong>full refund</strong> with no restocking fee since this was not your fault.</p>
+    {% else %}
     <p>If you make a payment error, you'll receive an automatic refund minus a 9% restocking fee that covers network costs and prevents abuse.</p>
     <ul style="margin: 10px 0;">
       <li><strong>Overpayment:</strong> Fulfilled & excess refunded minus fee</li>
       <li><strong>Underpayment:</strong> Refunded minus fee</li>
       <li><strong>Late payment:</strong> Refunded minus fee if sent after the minute expiry</li>
+      <li><strong>Out of stock:</strong> <strong>Full refund</strong> (no fee - not your fault)</li>
       <li><strong>Wrong address:</strong> Cannot be recovered</li>
     </ul>
+    {% endif %}
   </div>
   {% else %}
   <div style="background: #fef3c7; border: 1px solid #f59e0b; border-radius: 4px; padding: 15px; margin: 20px 0;">
     <p><strong>⚠️ No refund address configured</strong></p>
+    {% if status == 'out-of-stock-no-refund' %}
+    <p><strong>📦 Out of Stock - No Refund Possible</strong></p>
+    <p>This item became unavailable after your payment, but without a refund address configured, the funds were transferred to the shop's cold storage.</p>
+    {% else %}
     <p>Without a refund address, all payment errors result in lost funds:</p>
     <ul style="margin: 10px 0;">
       <li>Underpayments are kept</li>
       <li>Overpayments are kept</li>
       <li>Late payments after <strong>{{ ((expires_at - now) // 60000) if expires_at and (expires_at - now) > 0 else 'expiry' }} minutes</strong> are kept</li>
+      <li><strong>Out of stock:</strong> Funds transferred to shop (no refund possible)</li>
       <li>Wrong address payments cannot be recovered</li>
     </ul>
+    {% endif %}
     <p style="margin-top: 10px;">Consider configuring a refund address for future purchases.</p>
   </div>
   {% endif %}