release: 发布 v0.6.4 环境自适应与 macOS 打包

新增能力：桌面端新增 macOS 打包支持，electron-builder 增加独立 mac 配置块，
产出 dmg，按 arm64、x64 分别单独构建、不产出 universal 包；Pandoc 运行时清单
新增 darwin/arm64、darwin/x64 两个官方发行项（含独立许可证文件来源），桌面
Pandoc 候选路径与 prepare-pandoc-runtime.mjs 均已泛化为按 --platform/--arch
参数选取目标，不再只认 Windows x64。AGENTS.md 不再硬编码 Windows 绝对路径与
强制 PowerShell 语法，改为按当前 Shell 与仓库实际位置自适应。

问题修复：修复解压内置 Pandoc 时未保留 Unix 可执行权限位的问题（unzipSync
不保留压缩包内权限，已补 chmod 0o755）；修复根 package.json 中
build:web-runtime/dev/desktop:dev 三个脚本的构建顺序错误
（@md-to-pdf/application 被排在其依赖的 @md-to-pdf/preview-engine 之前，在
没有历史 dist 残留的全新环境中会导致类型解析失败）；修正
packages/docx-engine/tests/pandoc-runtime.test.ts 与
apps/desktop/tests/markdown-file.test.ts 中依赖宿主 OS 或路径分隔符的测试
断言，避免这些用例只能在特定平台上通过。

验证结果：docx-engine 包 93 项测试、desktop 包 62 项测试（61 通过 + 1 项
Windows 专属用例按预期跳过）均通过；全项目类型检查、生产构建通过，
git diff --check 无空白错误。跳过依赖 Git 忽略的真实客户文档语料（tmp/）的
test:docx-real-world-corpus 与 test:docx-release-gate-suites 后，其余全部
工作区测试均通过；这两步需要接入真实语料的机器上单独执行。本机 macOS
（Apple Silicon）实测 npm run package:mac:arm64 全链路成功，内置 Pandoc
3.9.0.2 完成下载、哈希校验与真实 DOCX 冒烟转换；实际截图确认窗口、macOS
原生菜单栏、编辑器工具栏、中文字体与实时预览渲染正常。

兼容与部署：版本统一为 0.6.4。本版本仅完成开发基础设施与验证，未构建正式
发行文件：没有产出真实签名的 dmg、没有重新构建 Windows 安装包，也没有重新
构建 Docker 镜像；正式 macOS 发行产物与 Windows/Docker 同步验证留待 DOCX
发布门禁阶段完成后一并发布。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K5N6pcbjV4jVfXrcH3NcLP

package.json

@@ -1,6 +1,6 @@
 {
   "name": "md-to-pdf",
-  "version": "0.6.2",
+  "version": "0.6.4",
   "private": true,
   "license": "UNLICENSED",
   "description": "面向结构化 Markdown 的主题化文档创作与发布工具",
@@ -10,8 +10,8 @@
   ],
   "scripts": {
     "build": "npm run build:web-runtime && npm run build -w @md-to-pdf/font-pack-builder && npm run build -w @md-to-pdf/server && npm run build -w @md-to-pdf/desktop",
-    "build:web-runtime": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/web",
-    "dev": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/preview-engine && concurrently -k -n markdown-echarts,core,semantic-document,docx-theme-engine,font-pack-registry,docx-engine,renderer,application,preview-engine,server,web \"npm:dev:markdown-echarts\" \"npm:dev:core\" \"npm:dev:semantic-document\" \"npm:dev:docx-theme-engine\" \"npm:dev:font-pack-registry\" \"npm:dev:docx-engine\" \"npm:dev:renderer\" \"npm:dev:application\" \"npm:dev:preview-engine\" \"npm:dev:server\" \"npm:dev:web\"",
+    "build:web-runtime": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/web",
+    "dev": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/application && concurrently -k -n markdown-echarts,core,semantic-document,docx-theme-engine,font-pack-registry,docx-engine,renderer,application,preview-engine,server,web \"npm:dev:markdown-echarts\" \"npm:dev:core\" \"npm:dev:semantic-document\" \"npm:dev:docx-theme-engine\" \"npm:dev:font-pack-registry\" \"npm:dev:docx-engine\" \"npm:dev:renderer\" \"npm:dev:application\" \"npm:dev:preview-engine\" \"npm:dev:server\" \"npm:dev:web\"",
     "dev:markdown-echarts": "npm run dev -w @md-to-pdf/markdown-echarts",
     "dev:core": "npm run dev -w @md-to-pdf/core",
     "dev:semantic-document": "npm run dev -w @md-to-pdf/semantic-document",
@@ -24,12 +24,17 @@
     "dev:server": "npm run dev -w @md-to-pdf/server",
     "dev:web": "npm run dev -w @md-to-pdf/web",
     "dev:desktop": "npm run dev -w @md-to-pdf/desktop",
-    "desktop:dev": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/preview-engine && concurrently -k -n web,desktop \"npm:dev:web\" \"npm:dev:desktop\"",
+    "desktop:dev": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/semantic-document && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/application && concurrently -k -n web,desktop \"npm:dev:web\" \"npm:dev:desktop\"",
     "desktop:package": "npm run build:font-pack && npm run package -w @md-to-pdf/desktop",
+  "desktop:package:mac:arm64": "npm run build:font-pack && npm run package:mac:arm64 -w @md-to-pdf/desktop",
+  "desktop:package:mac:x64": "npm run build:font-pack && npm run package:mac:x64 -w @md-to-pdf/desktop",
     "build:font-pack": "npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/docx-theme-engine && npm run build -w @md-to-pdf/font-pack-registry && npm run build -w @md-to-pdf/docx-engine && npm run build -w @md-to-pdf/font-pack-builder && node scripts/build-font-packs.mjs",
     "verify:font-pack": "npm run build:font-pack",
     "verify:docker-font-pack": "npm run verify:font-pack && npm run build:web-runtime && npm run build -w @md-to-pdf/server && node deploy/verify-font-pack-compose.mjs",
     "desktop:make": "npm run build:font-pack && node scripts/build-desktop-release.mjs",
+  "desktop:make:mac:arm64": "npm run build:font-pack && npm run make:mac:arm64 -w @md-to-pdf/desktop",
+  "desktop:make:mac:x64": "npm run build:font-pack && npm run make:mac:x64 -w @md-to-pdf/desktop",
+  "desktop:make:mac": "npm run desktop:make:mac:arm64 && npm run desktop:make:mac:x64",
     "release:stage": "node scripts/stage-release.mjs",
     "test:release-stage": "node --test scripts/stage-release.test.mjs",
     "test:docx-layout-visual-matrix-cases": "node --test scripts/docx-layout-visual-matrix-cases.test.mjs",