feat: Implement cutout tool and depth generation features

- Added a new cutout tool for selecting regions in images, allowing users to choose mesh shapes based on selected areas.
- Introduced depth generation capabilities for rasterized images, including normal data extraction.
- Created jobs for generating depth planes and region data, enhancing the AI data generation workflow.
- Developed a selection refinement process for cutout regions, improving accuracy in generated outputs.
- Established a new region module for handling rasterized image regions and their associated AI generation tasks.
- Enhanced node graph builders for asset generation, facilitating smoother integration of new features.

docs/internals/operators/perspective-tool.md

@@ -10,7 +10,7 @@ operators/perspective_tool/
 └── edit_perspective.py    # 四点交互、预览、Homography 与写回
 ```
 
-图片选择、裁切和 Empty 写回复用 `operators/common/` 的基础能力，不与 Image Mask Operator 共享业务状态。
+图片坐标投射、Alpha 裁切和 Empty 写回复用 `operators/common/` 的基础能力；四点数据始终称为 Quad，不与 Image Region 或 Image Mask Operator 共享业务状态。
 
 ## 矫正流程
 
@@ -29,4 +29,4 @@ flowchart TD
 
 Homography 使用预乘 Alpha 插值，避免透明边缘混入黑色。输出最长边限制为 8192 px，总像素限制为 16,777,216，并按 256 行分块计算，控制中间数组大小。
 
-Perspective 是 deform 工具，不提供 Refine 或反选。结果比例可能不同于原四边形的轴对齐范围，因此 Empty 写回保持中心和覆盖尺度近似一致，而不是假设当前 3D View 相机等于图片拍摄相机。
+Perspective 是 deform 工具，不提供 Refine 或反选。它通过公共 `image_pixels()` 读取供预览与最终 Warp 共用的源像素，并与 Image Mask 共用像素结果创建和 Image Empty 替换入口。结果比例可能不同于原四边形的轴对齐范围，因此 Empty 写回保持中心和覆盖尺度近似一致，而不是假设当前 3D View 相机等于图片拍摄相机。