docs: update README and README_CN

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

Author: miaobyte

README.md

@@ -7,7 +7,7 @@
 
 **The VM of deepx (formerly dxlang) — an agent-native, train-inference-unified, self-iterating AI compute architecture.** kvspace tree paths form a single unified address space; one syntax simultaneously serves as VM instructions, high-level language, compiler IR, and human-readable source.
 
-> 中文文档: [README_CN.md](README_CN.md) | Design: [kvlang-deep-dive](https://github.com/array2d/deepx-design/blob/master/doc/kvlang-deep-dive.md) — root design doc; README is the teaching derivative. All behavior norms (p0–p7), instruction model (§2), Link call mechanism (§6), type system (§9), diagnostics (§12) live there.
+> 中文文档: [README_CN.md](README_CN.md) | Design: [deep-dive](https://github.com/array2d/deepx-design/blob/master/doc/kvlang/deep-dive.md) — root design doc; README is the teaching derivative. All behavior norms (p0–p7), instruction model (§2), Link call mechanism (§6), type system (§9), diagnostics (§12) live there.
 
 ---
 

README_CN.md

@@ -7,7 +7,7 @@
 
 **deepx 的 VM（原 dxlang），agent-native 训推一体自迭代强人工智能计算架构。** 以 kvspace 树形路径为统一地址空间，同种语法同时承担 VM 指令、高级语言、编译器 IR、人类可读源码四种职能。
 
-> English: [README.md](README.md) | 设计：[kvlang-deep-dive](https://github.com/array2d/deepx-design/blob/master/doc/kvlang-deep-dive.md) — 根设计文档；README 为教学衍生。全部行为规范（p0–p7）、指令模型（§2）、Link 调用机制（§6）、类型系统（§9）、诊断体系（§12）均在其中。
+> English: [README.md](README.md) | 设计：[deep-dive](https://github.com/array2d/deepx-design/blob/master/doc/kvlang/deep-dive.md) — 根设计文档；README 为教学衍生。全部行为规范（p0–p7）、指令模型（§2）、Link 调用机制（§6）、类型系统（§9）、诊断体系（§12）均在其中。
 
 ---