fix: equalize key monitor and history card heights

Stretch both cards in the dual panel grid while keeping list areas scrollable inside.

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

strategy_templates/key_monitor_panel.html

@@ -1,18 +1,22 @@
 <style>
-.key-monitor-dual-grid{align-items:start}
-.key-monitor-dual-grid>.card{height:auto;min-height:0}
+.key-monitor-dual-grid{align-items:stretch}
+.key-monitor-dual-grid>.card{
+    height:100%;
+    min-height:0;
+    display:flex;
+    flex-direction:column;
+}
 .key-panel-scroll.panel-scroll.pos-list{
     display:block;
-    flex:1 1 0;
+    flex:1 1 auto;
     min-height:200px;
-    max-height:min(70vh,640px);
+    max-height:none;
     overflow-x:hidden;
     overflow-y:auto;
     padding-bottom:6px;
     -webkit-overflow-scrolling:touch;
     scrollbar-gutter:stable;
 }
-.key-history-scroll.key-panel-scroll{max-height:min(72vh,680px)}
 .key-panel-scroll.panel-scroll.pos-list .key-row-collapse{flex-shrink:0}
 .key-panel-scroll.panel-scroll.pos-list::-webkit-scrollbar{width:8px}
 .key-panel-scroll.panel-scroll.pos-list::-webkit-scrollbar-thumb{background:#3a4660;border-radius:4px}
@@ -196,7 +200,7 @@
 <div class="card">
     <h2 style="margin-bottom:8px">关键位历史</h2>
     <div class="sub" style="font-size:.72rem;color:#8892b0;margin-bottom:8px">失效或已结案的关键位 · 点击展开详情</div>
-    <div class="panel-scroll pos-list key-panel-scroll key-history-scroll">
+    <div class="panel-scroll pos-list key-panel-scroll">
         {% for h in key_history %}
         <details class="key-row-collapse key-history-{{ key_history_outcome_kind(h) }}">
             <summary class="key-row-collapse-summary">