Complete inital re-design of client page

packages/sshecret-admin/src/sshecret_admin/frontend/templates/base/master-detail.html.j2

@@ -0,0 +1,27 @@
+{% extends 'base/page.html.j2' %}
+
+
+{% block title %}Clients{% endblock %}
+
+{% block page_content %}
+
+  <!-- Master-Detail Layout -->
+  <div class="grid grid-cols-1 md:grid-cols-[300px_1fr] gap-4">
+
+    <!-- Master (e.g., tree or list) -->
+    <div id="master-pane">
+      {% block master %}
+        <p>Master list goes here</p>
+      {% endblock %}
+    </div>
+
+    <!-- Detail (loaded by HTMX or inline) -->
+    <div id="detail-pane" class="bg-white rounded shadow p-4">
+      {% block detail %}
+        <p>Select an item from the list to view details.</p>
+      {% endblock %}
+    </div>
+
+  </div>
+
+{% endblock %}