实现功能：当内容区只包含一个Panel时，拖动Panel标题栏可以移动Area

AutoRobot/Windows/Robot/Web/src/DockLayout/DockLayout.vue

@@ -110,8 +110,8 @@ const addFloatingPanel = () => {
           title: `面板 1`,
           x: 0,
           y: 0,
-        width: 300, // 与Area宽度相同
-        height: 250, // 与Area高度相同
+          width: 100,
+          height: 100,
           collapsed: false,
           toolbarExpanded: false
         }

AutoRobot/Windows/Robot/Web/src/DockLayout/Panel.vue

@@ -1,6 +1,6 @@
 <template>
-  <div class="panel absolute bg-white shadow rounded border overflow-hidden" 
-       :style="{ top: y + 'px', left: x + 'px', width: width + 'px', height: height + 'px' }">
+  <div class="panel bg-white shadow overflow-hidden" 
+       :style="{ width: '100%', height: '100%' }">
     <div class="flex flex-col h-full">
       <!-- 标题栏 -->
       <div class="title-bar h-6 bg-[#435d9c] text-white px-2 flex items-center justify-between select-none cursor-move"