fix: json-form-Extension fuer Standalone-Elemente, Kontoname in Buchungsliste

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

finance/app/templates/transactions.html

@@ -50,7 +50,7 @@
     {% for tx in transactions %}
     <tr>
       <td>{{ tx.booking_date.strftime('%d.%m.%Y') }}</td>
-      <td>{{ tx.account_id }}</td>
+      <td>{{ account_names.get(tx.account_id, tx.account_id) }}</td>
       <td>{{ tx.purpose }}</td>
       <td>{{ tx.counterparty }}</td>
       <td class="{{ 'neg' if tx.amount < 0 else '' }}">{{ '%.2f'|format(tx.amount) }} €</td>
@@ -128,7 +128,9 @@
       var out = {};
       for (var k in parameters) {
         var v = parameters[k];
-        var field = elt.querySelector('[name="' + k + '"]');
+        var field = elt.matches && elt.matches('[name="' + k + '"]')
+          ? elt
+          : elt.querySelector('[name="' + k + '"]');
         var kind = field && field.dataset ? field.dataset.type : null;
         if (v === '') {
           out[k] = null;