优化左边框拖动逻辑，确保拖动时Area向左边扩展

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

@@ -351,8 +351,10 @@ const onResizeMove = (e) => {
       newHeight = Math.max(150, resizeStartSize.value.height + deltaY)
       break
     case 'w':
+      // 拖动左边框时，Area向左边扩展
       newWidth = Math.max(200, resizeStartSize.value.width - deltaX)
-      newLeft = resizeStartPos.value.left + deltaX
+      // 当deltaX为负时，鼠标向左移动，增加宽度并向左移动位置
+      newLeft = resizeStartAreaPos.value.left + deltaX
       break
   }