增加画布元素吸附功能

新增画布元素边缘、中心线与等距吸附计算。

接入图层与生成占位拖拽吸附,并保持多选队形同步偏移。

补充画布吸附模型和交互测试。

更新图片画布编辑器方案文档中的吸附验收口径。
This commit is contained in:
2026-06-22 17:22:01 +08:00
parent 139ef3b3fa
commit 8b18a654eb
8 changed files with 566 additions and 47 deletions
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