docs: 收口为中文唯一文档站，移除英文与双语基础设施

删除 docs/en/ 全部 38 个英文文档、双语切换组件（LanguageSwitcher/
LanguageRedirect/LandingHero）、language-routing/config-helpers 及对应
测试，以及 README.zh-CN.md、CONTRIBUTING.zh.md、TRANSLATION_SCOPE.md、
META.md 等双语维护设施。

重写 README/CONTRIBUTING/CLAUDE/docs 入口为纯中文，docs/zh/index.md
改用 VitePress 原生 home 布局，config.ts 移除 en locale 与
englishReferenceHub。修复 4 个 example README 与 learning-path、
evolution、PR 模板中的英文/双语引用。

文档测试 3/3 通过，vitepress build 成功（40 个 zh/ markdown）。

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: LessUp

.github/PULL_REQUEST_TEMPLATE.md

@@ -24,7 +24,6 @@ Brief description of what this PR adds or fixes.
   - [ ] ThreadSanitizer (for concurrency code): `cmake --preset=tsan && cmake --build build/tsan && ctest --preset=tsan`
   - [ ] UndefinedBehaviorSanitizer: `cmake --preset=ubsan && cmake --build build/ubsan && ctest --preset=ubsan`
 - [ ] I have updated the documentation accordingly (if applicable)
-- [ ] Both English and Chinese documentation are updated (if applicable)
 - [ ] My changes generate no new warnings
 - [ ] I have added tests that prove my fix is effective or that my feature works (if applicable)
 - [ ] I ran `/review` or an equivalent review pass for this non-trivial change

CLAUDE.md

@@ -25,7 +25,7 @@ cpp-high-performance-guide/
 ├── benchmarks/
 ├── tools/
 ├── scripts/
-├── docs/                  # VitePress site and bilingual learning docs
+├── docs/                  # VitePress site (Chinese only)
 ├── .githooks/             # Project-managed Git hooks
 └── .github/
 ```
@@ -56,7 +56,7 @@ cmake --preset=release && cmake --build build/release
 - Prefer **deleting or archiving stale content** instead of preserving redundant surfaces.
 - Keep **README** focused on repository entry and onboarding; use the docs site for the richer narrative.
 - Treat **GitHub Pages** as a project landing page, not a thin README mirror.
-- Keep user-facing documentation **English + Chinese** where the surface is meant to be bilingual.
+- Documentation is **Chinese only**. Do not reintroduce English documentation surfaces.
 - Use **CMake presets** as the default build and test entry points.
 - Keep workflows **preset-driven, low-noise, and meaningful**.
 - Avoid over-engineering with extra plugins, MCP servers, or automation layers unless they clearly reduce maintenance cost.
@@ -76,4 +76,4 @@ The `.vscode/` directory is **gitignored**. Use `.clangd`, `.editorconfig`, and
 - non-blocking CI steps that hide real failures
 - per-example shim headers that only re-export a canonical `include/hpc/` header
 - wrapper scripts that duplicate `cmake --preset` commands
-- English-only documentation surfaces (all bilingual surfaces must have zh parity)
+- English documentation surfaces or bilingual parity machinery

CONTRIBUTING.md

@@ -1,8 +1,8 @@
-# Contributing
+# 参与贡献
 
-Thanks for contributing. This repository prefers **spec-driven, low-noise changes** over broad, loosely scoped edits.
+感谢你的贡献。这个仓库更偏好 **规格驱动、低噪声** 的修改，而不是范围松散的大改。
 
-## First-time setup
+## 首次配置
 
 ```bash
 git clone https://github.com/<your-username>/cpp-high-performance-guide.git
@@ -14,15 +14,15 @@ cmake --build build/debug
 ctest --preset=debug
 ```
 
-`./scripts/setup.sh` checks the local toolchain and configures repository-managed Git hooks through `.githooks/`.
+`./scripts/setup.sh` 会检查本地工具链，并通过 `.githooks/` 配置仓库自带的 Git hooks。
 
-## Default workflow
+## 默认开发流程
 
-1. Keep docs and code in sync.
-2. Run the required validation commands.
-3. Use `/review` before merge for non-trivial work.
+1. 保持文档与代码同步。
+2. 运行要求的验证命令。
+3. 对非 trivial 修改在合并前使用 `/review`。
 
-## Validation commands
+## 验证命令
 
 ```bash
 cmake --preset=debug && cmake --build build/debug && ctest --preset=debug
@@ -33,36 +33,35 @@ cmake --preset=tsan && cmake --build build/tsan && ctest --preset=tsan
 cmake --preset=ubsan && cmake --build build/ubsan && ctest --preset=ubsan
 ```
 
-The `tsan` preset is standardized on **Clang** because it is the most reliable ThreadSanitizer path for this repository.
+`tsan` preset 默认走 **Clang**，这是当前仓库里最稳定的 ThreadSanitizer 路径。
 
-## Formatting and hooks
+## 格式化与 hooks
 
 ```bash
 ./scripts/format.sh
 ./scripts/format.sh --check
 ./scripts/setup-hooks.sh
 ```
 
-The repository hooks currently enforce:
+当前 hooks 会做这些事情：
 
-- no generated build or docs artifacts in commits
-- formatting checks for staged C++ files
-- a debug build/test pass on push
+- 拒绝提交生成的构建产物或 docs 产物
+- 对 staged C++ 文件做格式检查
+- push 前执行一次 debug build/test
 
-## Documentation rules
+## 文档规则
 
-- Keep root README files concise and entry-focused.
-- Treat `docs/` as the richer narrative surface.
-- Keep user-facing English and Chinese entry points aligned.
-- Do not reintroduce GitBook / HonKit / `.kiro` references.
+- 根 README 保持简洁，专注仓库入口。
+- `docs/` 承担更完整的叙事与学习路径。
+- 不要重新引入 GitBook / HonKit / `.kiro` 引用。
 
-## Process rules
+## 流程规则
 
-- Prefer deleting or archiving stale content over preserving it in active paths.
-- Keep workflow additions justified and repository-specific.
-- Avoid long-lived branch sprawl; one focused branch or PR per change is preferred.
-- Do not merge non-trivial structural work without review.
+- 对过时内容，优先删除或归档，而不是继续留在主路径。
+- 新增 workflow 或工程化配置前，要能说明其项目特定价值。
+- 避免同时维护大量长期分支；一个 change 对应一个聚焦分支或 PR 更合适。
+- 非 trivial 的结构性修改不要跳过 review。
 
-## Need the AI workflow?
+## 如果你需要 AI 开发流程
 
-See `CLAUDE.md` for Claude Code specific guidance.
+参见 `CLAUDE.md`。

CONTRIBUTING.zh.md

@@ -1,4 +1,4 @@
-# C++ High Performance Guide
+# C++ 高性能指南
 
 <p align="center">
   <a href="https://github.com/LessUp/cpp-high-performance-guide/stargazers">
@@ -13,38 +13,38 @@
 </p>
 
 <p align="center">
-  <b>English</b> | <a href="README.zh-CN.md">简体中文</a> | <a href="https://lessup.github.io/cpp-high-performance-guide/">GitHub Pages</a> | <a href="https://github.com/LessUp/cpp-high-performance-guide/discussions">Discussions</a>
+  <a href="https://lessup.github.io/cpp-high-performance-guide/">文档站</a> | <a href="https://github.com/LessUp/cpp-high-performance-guide/discussions">讨论</a>
 </p>
 
 <p align="center">
-  Learn measurable C++20 performance engineering through runnable examples, benchmarks, and a VitePress-powered learning site.
+  通过可运行示例、基准测试和 VitePress 文档站，学习可验证的现代 C++20 性能工程。
 </p>
 
-## Why this repository exists
+## 这个仓库解决什么问题
 
-This project is a practical guide to common C++ performance topics that are easy to talk about but harder to validate:
+关注那些"很容易被谈论、但不容易被验证"的 C++ 性能主题：
 
-- modern CMake and preset-driven builds
-- memory and cache layout decisions
-- modern C++ performance patterns
-- SIMD and vectorization
-- concurrency and lock-free basics
-- profiling and benchmark-driven reasoning
+- 现代 CMake 与 preset 驱动的构建流程
+- 内存与缓存布局取舍
+- 现代 C++ 的性能实践
+- SIMD 与向量化
+- 并发与无锁基础
+- 基于 benchmark 与 profiling 的性能分析
 
-Every major topic is meant to be **readable, buildable, and measurable**.
+每个主题都尽量做到 **可阅读、可构建、可测量**。
 
-## What you can explore
+## 你可以从哪里开始
 
-| Area | What it covers |
+| 区域 | 内容 |
 | --- | --- |
-| `examples/01-cmake-modern/` | modern CMake structure and best practices |
-| `examples/02-memory-cache/` | AOS vs SOA, false sharing, alignment, prefetch |
-| `examples/03-modern-cpp/` | constexpr, move semantics, reserve, ranges |
-| `examples/04-simd-vectorization/` | auto-vectorization, intrinsics, SIMD wrappers |
-| `examples/05-concurrency/` | atomics, lock-free queue, OpenMP |
-| `docs/` | bilingual Pages whitepaper covering academy, architecture, playbook, reference, research |
+| `examples/01-cmake-modern/` | 现代 CMake 结构与反模式 |
+| `examples/02-memory-cache/` | AOS vs SOA、伪共享、对齐、预取 |
+| `examples/03-modern-cpp/` | constexpr、移动语义、reserve、ranges |
+| `examples/04-simd-vectorization/` | 自动向量化、intrinsics、SIMD 封装 |
+| `examples/05-concurrency/` | 原子操作、无锁队列、OpenMP |
+| `docs/` | VitePress 文档站，覆盖学院 / 架构 / 实践手册 / 参考 / 研究 |
 
-## Quick start
+## 快速开始
 
 ```bash
 git clone https://github.com/LessUp/cpp-high-performance-guide.git
@@ -54,17 +54,13 @@ cmake --preset=release
 cmake --build build/release
 ```
 
-Run one benchmark:
+运行一个 benchmark：
 
 ```bash
 ./build/release/examples/02-memory-cache/aos_soa_bench
 ```
 
-Need the redesigned docs route after the quick start? Start with
-[`docs/en/playbook/index.md`](docs/en/playbook/index.md), then continue to
-[`docs/en/guides/validation.md`](docs/en/guides/validation.md) for sanitizer-specific guidance.
-
-## Validation commands
+## 常用验证命令
 
 ```bash
 cmake --preset=debug && cmake --build build/debug && ctest --preset=debug
@@ -75,22 +71,21 @@ cmake --preset=tsan && cmake --build build/tsan && ctest --preset=tsan
 cmake --preset=ubsan && cmake --build build/ubsan && ctest --preset=ubsan
 ```
 
-## Documentation entry points
+## 文档入口
 
-- **Docs site:** <https://lessup.github.io/cpp-high-performance-guide/>
-- **Playbook:** [`docs/en/playbook/index.md`](docs/en/playbook/index.md)
-- **Reference:** [`docs/en/reference/index.md`](docs/en/reference/index.md)
-- **Chinese entry:** `README.zh-CN.md` and `docs/zh/`
+- **文档站：** <https://lessup.github.io/cpp-high-performance-guide/>
+- **实践手册：** [`docs/zh/playbook/index.md`](docs/zh/playbook/index.md)
+- **参考：** [`docs/zh/reference/index.md`](docs/zh/reference/index.md)
 
-## Tech stack
+## 技术栈
 
-- **Language:** C++20
-- **Build:** CMake 3.20+, Ninja
-- **Testing:** Google Test, RapidCheck
-- **Benchmarking:** Google Benchmark
-- **Docs:** VitePress + GitHub Pages
-- **Profiling:** perf, FlameGraph, Valgrind, VTune
+- **语言：** C++20
+- **构建：** CMake 3.20+、Ninja
+- **测试：** Google Test、RapidCheck
+- **基准测试：** Google Benchmark
+- **文档：** VitePress + GitHub Pages
+- **性能分析：** perf、FlameGraph、Valgrind、VTune
 
-## Contributing
+## 贡献
 
-See `CONTRIBUTING.md` for the contributor workflow and hooks setup.
+贡献流程与 hooks 配置见 [`CONTRIBUTING.md`](CONTRIBUTING.md)。