chore: 为所有 md 文件添加 Hugo front matter

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- 异常: 3 个(H1 缺失,用文件名兜底)
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  - plans/PRISM/.research/readmes/openmask3d.md
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---
title: "Chapter 04 — 管线 AiPhone 离线建图"
date: 2026-05-20
draft: false
tags: ["PRISM", "世界模型", "空间记忆", "点云", "Gaussian Splatting", "iOS"]
categories: ["worldmodel"]
---
# Chapter 04 — 管线 AiPhone 离线建图
> 本章目标:把 iPhone Pro 扫描得到的 **USDZ / RoomPlan JSON / 原始 ARKit 数据**,转换为 PRISM 的 **`SpatialMemory` 长期记忆 LTM**,包括 L2 度量 + L3 拓扑 + L4 语义。