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

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

finance/app/routers/gui.py

@@ -84,9 +84,11 @@ def buchungen(
         offset=0,
         session=session,
     )
+    accounts = session.execute(select(Account)).scalars().all()
     return templates.TemplateResponse(request, "transactions.html", {
         "transactions": txs,
-        "accounts": session.execute(select(Account)).scalars().all(),
+        "accounts": accounts,
+        "account_names": {a.id: a.name for a in accounts},
         "categories": session.execute(select(Category)).scalars().all(),
         "filters": {
             "account_id": account_id,