Initial Claude implementation

app/templates/base.html

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>{% block title %}{{ app_name }}{% endblock %}</title>
+  <link rel="stylesheet" href="/static/css/style.css">
+  <script src="https://unpkg.com/htmx.org@1.9.12"
+          integrity="sha384-ujb1lZYygJmzgSwoxRggbCHcjc0rB2XoQrxeTUQyRjrOnlCoYta87iKBWq3EsdM2"
+          crossorigin="anonymous"></script>
+</head>
+<body>
+  {% block body %}{% endblock %}
+</body>
+</html>