refactor: 优化数据大屏大量图片拖拽容易出现卡顿问题#17344 (#17911)

cherry-pick 039dcb23，添加拖拽节流和requestAnimationFrame优化，
保留当前分支的tOffset缩放偏移计算逻辑。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -597,6 +597,7 @@ const handleMouseDownOnShape = e => {
     ? document.getElementById('shape-id-' + canvasId.value.split('--')[0])
     : null
   const curDom = document.getElementById(domId.value)
+
   // 添加节流变量
   let rafId = null
   let lastTime = 0