关键位监控仅一条时默认展开，两条及以上默认折叠。

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/strategy/templates/key_monitor_panel.html

@@ -196,7 +196,7 @@
     </details>
     <div class="panel-scroll pos-list key-panel-scroll key-monitor-panel-scroll">
         {% for k in key %}
-        <details class="key-row-collapse" id="key-row-{{ k.id }}">
+        <details class="key-row-collapse" id="key-row-{{ k.id }}"{% if (key|length) == 1 %} open{% endif %}>
             <summary class="key-row-collapse-summary">
                 <span class="key-row-summary-main">
                     <span class="key-row-summary-title">