完善Area组件功能：优化居中定位逻辑，确保关闭时同步移除Panel，满足所有需求

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

@@ -262,21 +262,33 @@ onMounted(() => {
   
   // 如果没有指定left或top，自动居中定位
   if (originalPosition.value.left === undefined || originalPosition.value.top === undefined) {
-    if (parentContainer.value && parentContainer.value !== window) {
+    let parentWidth, parentHeight
+    
+    if (parentContainer.value === window) {
+      parentWidth = window.innerWidth
+      parentHeight = window.innerHeight
+    } else if (parentContainer.value) {
       const parentRect = parentContainer.value.getBoundingClientRect()
-      const areaWidth = originalPosition.value.width
-      const areaHeight = originalPosition.value.height
-      
-      // 计算居中位置
-      originalPosition.value.left = Math.floor((parentRect.width - areaWidth) / 2)
-      originalPosition.value.top = Math.floor((parentRect.height - areaHeight) / 2)
-      
-      // 通知父组件位置变化
-      emit('update:position', {
-        left: originalPosition.value.left,
-        top: originalPosition.value.top
-      })
+      parentWidth = parentRect.width
+      parentHeight = parentRect.height
+    } else {
+      // 默认值，防止出错
+      parentWidth = 800
+      parentHeight = 600
     }
+    
+    const areaWidth = originalPosition.value.width || 300
+    const areaHeight = originalPosition.value.height || 250
+    
+    // 计算居中位置
+    originalPosition.value.left = Math.floor((parentWidth - areaWidth) / 2)
+    originalPosition.value.top = Math.floor((parentHeight - areaHeight) / 2)
+    
+    // 通知父组件位置变化
+    emit('update:position', {
+      left: originalPosition.value.left,
+      top: originalPosition.value.top
+    })
   }
 })
 </script>