fix(diy): 贴纸尺寸归一化画布空间 + 坐标钳制 + 旧数据读端兼容

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修正工作流批次②（问题1 重叠误报）：
- addSticker 按 mask 短边 60% 归一化 width/height（契约实现注记：
  width/height 语义 = 画布显示像素），渲染/碰撞/WCD 三方自洽
- 拖动与缩放后坐标钳制在 [0, mask尺寸-显示尺寸]，杜绝负坐标/拖出画布
- 读取端兼容：旧数据 width > mask 尺寸时按 mask 等比归一化（不做存量迁移）
- canvas-image/preview-image 补 transform-origin: top left，
  缩放原点与碰撞盒（左上角）语义一致

Co-Authored-By: Claude <noreply@anthropic.com>

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This commit is contained in:

lhmin0604

2026-09-12 19:10:37 +08:00

co-authored by Claude

parent eea6c3feef

commit 3b224cf41b

4 changed files with 54 additions and 16 deletions

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dist/pages/diy/index.js

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dist/pages/diy/index.wxss

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