Pr@dev v2@fix mobile watermark (#16542)

* fix(仪表板): 修复移动端部分查询组件悬浮移位问题

* fix(仪表板): 修复移动端添加组件时，水印可能覆盖不全问题

core/core-frontend/src/components/data-visualization/canvas/CanvasCore.vue

@@ -251,7 +251,7 @@ watch(
 )
 
 watch(
-  () => canvasStyleData.value,
+  [() => componentData.value.length, () => canvasStyleData.value],
   () => {
     nextTick(() => {
       initWatermark()