fix: Versionskennung an statischen Dateien gegen veraltete Browser-Caches (v0.13.1)

Gecachte style.css ohne Tortenfarben ließ alle Segmente schwarz erscheinen.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

finance/app/templates/base.html

@@ -4,10 +4,10 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>{% block title %}Finanzberatung{% endblock %}</title>
-  <link rel="stylesheet" href="/static/style.css">
-  <script src="/static/htmx.min.js"></script>
-  <script src="/static/sort.js"></script>
-  <script src="/static/doppelzaehlung.js"></script>
+  <link rel="stylesheet" href="/static/style.css?v={{ app_version }}">
+  <script src="/static/htmx.min.js?v={{ app_version }}"></script>
+  <script src="/static/sort.js?v={{ app_version }}"></script>
+  <script src="/static/doppelzaehlung.js?v={{ app_version }}"></script>
 </head>
 <body>
   <nav>