Add new functionality for image rectification and depth metadata handling

- Implemented a preview tool for rectifying images with interactive aspect controls in `preview.py`.
- Added tests for depth metadata loading to ensure consistent schema usage in `test_depth_metadata.py`.
- Developed comprehensive tests for cutout calibration processes in `test_cutout_calibration.py`, including stability checks and depth calibration.
- Created tests for frame compositing operations in `test_frame_compositing.py`, ensuring correct handling of depth and transparency.
- Introduced material slot inheritance functionality in `material_slots.py` to manage geometry material assignments.
- Built shared shader nodes for material processing in `shader.py`, including roughness and bump mapping setups.

docs/internals/common.md

@@ -6,6 +6,9 @@
 | --- | --- |
 | `ai.py` | 环境和模型就绪检查、输入路径校验、`production_device()`、`moge2_parameters()` 与安装 UI |
 | `image.py` | `image_rgba()`、动画帧设置、Job 输入准备、像素采样、结果 Image 和 `replace_empty_image()` |
+| `color_image.py` | 材质颜色与 AI 分析输入的准备和清理 |
+| `hdr_image.py` | HDR 去背景分析输入及浮点颜色保留 |
+| `image_target.py` | Image Empty 与 Shader Image Texture 编辑目标 |
 | `selection.py` | `SelectionPath`、`SelectionMask`、non-zero winding 栅格化与 Alpha 修整 |
 | `viewport.py` | 原生点选、屏幕投影、`ImageGesture`、Lasso / Brush / Polyline 与 Overlay |
 | `depth.py` | 深度图片和元数据加载、相机坐标与显示范围的尺度换算 |
@@ -15,22 +18,9 @@
 
 ## 图像生命周期
 
-```mermaid
-flowchart TD
-    A[Image 与 Image Empty] --> B[image_rgba 读取业务像素]
-    B --> C{处理位置}
-    C -- 本地 --> D[像素算法]
-    C -- Server --> E[prepare_image_input 或 prepare_image_bounds_input]
-    E --> F[Job 输出文件]
-    F --> G[加载并 Pack]
-    D --> G
-    G --> H[replace_empty_image]
-    H --> I[保留身份、共享引用、帧设置和画框]
-```
-
 业务像素采用 Top-down RGBA，`image_pixels()` 使用 Blender 像素顺序。预乘采样用于投影插值；文件或 Packed 图像的业务读取保留隐藏 RGB。直接编辑结果通过统一入口处理共享 Image、失败恢复和源数据清理。
 
-`prepare_image_input()` 返回路径及临时标记；`cleanup_image_input()` 与创建方配对。Cutout 的 `prepare_image_bounds_input()` 复用已读取的源 RGBA，输出指定几何 bounds 的矩形图片。
+`prepare_image_input()` 返回路径及临时标记；`cleanup_image_input()` 与创建方配对。`color_image.py` 的 `prepare_material_color_input()` 准备材质颜色，`material_analysis_input()` 提供分析输入；Cutout 按几何 bounds 裁切。
 
 ## 手势与 Selection