release: 发布 v0.5.1

新增能力：内置 4 套红头、3 套正式文档和 3 套标书主题，支持主题推荐页边距、页面装饰、页眉页脚和页码；增加结构化公文、项目报告及标书 Front Matter，内置 Fandol 中文字体、两份教程和 14 份主题示例。桌面工作流：重组更多菜单，增加新建、保存、另存为快捷键和未保存确认；另存为后跟随新路径，主题示例自动切换主题，Desktop 发行包完整携带教程、示例与字体。问题修复：修正红头标题居中与正式文档字体；围栏代码按正文宽度自动换行，长内容安全断行，至少两行即可在当前页分页，并统一保留 8px 左侧内容留白；Docker Web 镜像正确打包 samples。兼容与部署：未声明主题推荐设置时继续使用 16mm 默认页边距；Web 隐藏不适用的另存为。正式镜像 yixiong/md-to-pdf:v0.5.1 内容 ID 为 sha256:72f519a69bfd6cb2f6df30c2be938e58ceb6f20e4748a32551874de3d436b276，Compose 健康运行。验证结果：最终修复前 65 个测试文件、286 项测试通过，最终代码块与主题定向测试 27 项通过；全项目类型检查、生产构建和 git diff --check 通过。容器检出 14 套主题、17 份 Markdown，代码块回归 PDF 为 2 页且无越界。NSIS SHA-256 为 676CCE73D782B0B15AC6BC68F253CFBC4740383583E4DAA98F746EDF9999C5CC，ZIP SHA-256 为 82BF6ADF1200604F145CC86FA3ED193955CF6741EBEE3DF8953483515CFF621F。
release: 发布 v0.5.0
2026-07-29 16:58:17 +08:00 · 2026-07-28 18:01:22 +08:00 · 2026-07-28 13:31:42 +08:00 · 2026-07-27 23:16:47 +08:00
180 changed files with 15437 additions and 1423 deletions
@@ -3,12 +3,14 @@ dist/
 coverage/
 .env
 .env.local
+.conda_env
 .local/
 *.log
 .DS_Store
 Thumbs.db
 .idea/
 .vscode/
+.serena/
 tmp/
 playwright-report/
 test-results/
@@ -54,7 +54,8 @@ Get-Content -LiteralPath 'docs\PROGRESS.md' -Encoding UTF8
 - 使用固定版本 Chromium 生成真实、可搜索的 PDF 文件；
 - 支持纸张尺寸、方向、页边距、页眉、页脚和多种页码样式；
 - 支持主题清单与 CSS 主题扩展；
- 支持 Front Matter、表格、任务列表、脚注、代码高亮、KaTeX 和 Mermaid；
+- 支持 Front Matter、表格、任务列表、脚注、代码高亮、KaTeX、Mermaid 和 ECharts；
+- 提供 Web 与 Electron 桌面端，共用渲染、主题和分页核心；
 - 使用 Docker Compose 在内网部署；
 - 文档只在当前请求中临时处理，不建立文档历史数据库。

@@ -75,15 +76,19 @@ flowchart LR

 - 前端：React、TypeScript、Vite。
 - 后端：Node.js、TypeScript、Fastify。
+- 桌面端：Electron、electron-builder、NSIS。
+- 应用服务：`packages/application`。
 - 共享模型：`packages/core`。
 - Markdown 渲染：`packages/renderer`。
- PDF 引擎：计划使用 Playwright Chromium。
+- 连续预览与分页引擎：`packages/preview-engine`。
+- ECharts 协议与运行时：`packages/markdown-echarts`。
+- PDF 引擎：Web 使用固定版本 Playwright Chromium，桌面端使用 Electron Chromium。
 - Markdown：markdown-it 及 `@mdit/plugin-*` 插件。
 - 元数据：gray-matter。
 - 安全过滤：sanitize-html。
 - 代码高亮：highlight.js。
 - 数学公式：KaTeX。
- 图表：Mermaid。
+- 图表：Mermaid、ECharts。
 - 校验：Zod。
 - 测试：Vitest。
 - 部署：Docker、Docker Compose。
@@ -92,12 +97,15 @@ flowchart LR

 ```text
 apps/web/             前端编辑、配置与预览界面
-apps/server/          HTTP API、主题读取及未来 PDF 服务
+apps/server/          HTTP API、主题读取和 Playwright PDF 服务
+apps/desktop/         Electron 桌面壳、IPC、原生文件与 PDF 能力
+packages/application/ 共享应用服务、主题注册和图片资源处理
 packages/core/        导出配置和主题清单等共享模型
 packages/renderer/    Markdown 到安全 HTML 的渲染管线
-themes/               内置主题及未来可安装主题
-docker/               容器化配置
-tests/                跨包和端到端测试
+packages/markdown-echarts/ ECharts YAML 协议、验证和浏览器 SVG 运行时
+packages/preview-engine/ 连续预览、增量分页、媒体适配和 Paged.js 运行时
+themes/               内置主题
+deploy/               Docker、Compose、Nginx 和部署文档
 docs/                 进度、架构和部署文档
 ```

@@ -186,6 +194,11 @@ chore: 初始化项目骨架
 ```

 - 不修改或重写已有提交，除非用户明确要求。
+- 版本标签必须指向专门的发布提交。发布提交信息使用标准英文前缀
+  `release:`，简体中文正文必须完整列出该版本的新增能力、问题修复、
+  兼容性或部署变化、验证结果和发布产物，不得只写版本号或简略摘要。
+- 版本标签使用 annotated tag；标签说明应与发布提交正文保持一致，完整
+  记录本版本更新，不得使用只有版本号的标签说明。

 ## 9. 当前交接入口

@@ -1,26 +1,101 @@
 # Markdown PDF 导出器

-一个面向内网部署的 Markdown 排版与 PDF 导出工具。项目目标是使用同一份 HTML 和 CSS 完成网页预览与 Chromium PDF 渲染，并提供纸张、页边距、页眉页脚、页码及主题扩展能力。
+一个同时提供 Web 与 Windows 桌面端的 Markdown 排版、分页预览和 PDF
+导出工具。预览与 PDF 复用同一份安全 HTML、`#write` DOM、主题 CSS 和
+分页运行时，适合内网部署，也可以作为不依赖本地服务的桌面应用使用。

-## 当前状态
+当前版本：`v0.5.1`。

-已经实现：
+## v0.5.1 主要能力

- React Markdown 编辑与本地文件读取；
- Fastify 预览接口；
- 共享导出配置模型；
- 动态主题清单、CSS 和静态资源接口；
- Markdown、Front Matter、安全过滤和扩展语法渲染核心；
- 表格、任务列表、脚注、代码高亮、KaTeX 和 Mermaid；
- iframe 隔离的真实分页预览、双向滚动同步与主题切换；
- Chromium PDF 下载、精确 PDF.js 预览与导出性能观测；
- 五种纸张、页边距、页眉、页码、Mermaid 风格和浏览器配置缓存；
- 快速预览与精确预览共用的 50%～400% 显示缩放；
- 内置 Typora 风格、GitHub、Pixyll 和 Whitey 四套主题；
- Web 素材目录上传、桌面同目录相对图片和受限公网图片下载；
- 图片标题、整块分页及超高图片单页等比例适配；
- 无本地 Server 的 Electron 桌面端与 Windows 安装包；
- 前端、Fastify、Nginx 和 Playwright Chromium 的 AIO 容器部署。
+- 新增政企标准红头、函件红头、企业简版红头、简报红头等 4 套红头主题，
+  以及 3 套正式文档主题和 3 套标书主题；
+- 正式主题可声明推荐页边距、页眉页脚、页码和页面装饰；未声明时继续使用
+  16mm 默认页边距，选择正式主题时自动采用其规范参数；
+- 新增公文、项目报告和标书结构化 Front Matter，支持发文机关、文号、
+  签发人、密级、主送、抄送、印发信息、封面及落款等文档结构；
+- 内置方正书版兼容的 Fandol 中文字体资源，统一正文、红头标题与页眉页脚
+  字体，并修复红头标题居中；代码块支持按正文宽度自动换行、跨页分片，
+  同时保留 `8px` 左侧内容留白；
+- 内置 ECharts 与公文主题教程，并为 14 套主题提供示例 Markdown；
+  Desktop 发行包包含全部教程和示例，打开示例时自动切换相应主题；
+- “更多”菜单按文件、教程与示例、主题管理分区；Desktop 新增
+  `Ctrl+N/W/S/Shift+S` 工作流、未保存确认及跟随新路径的“另存为”，
+  Web 端隐藏不适用的“另存为”。
+
+## Web 与桌面端
+
+| 能力 | Web / Docker | Windows Desktop |
+| --- | --- | --- |
+| 新建 Markdown | 支持 | 支持 |
+| 打开 Markdown | 浏览器文件选择 | 原生对话框、文件关联、第二实例转交 |
+| 保存文件 | 浏览器下载 | 原生保存与另存为 |
+| 相对本地图片 | 默认不支持 | 以 Markdown 所在目录为安全边界 |
+| 文档内锚点 | 当前预览定位 | 当前预览定位 |
+| HTTP/HTTPS 链接 | 浏览器新窗口 | 系统默认浏览器 |
+| 本地文件链接 | 不执行 | 相对、绝对路径及 `file:` URI 均可尝试打开 |
+| 多文件 | 当前浏览器文档 | 多窗口、同一文件单例 |
+| 外部文件变化 | 不适用 | 窗口聚焦时提示重新加载 |
+| 远程图片 | 服务端受限下载并内嵌 | 应用服务受限下载并内嵌 |
+| 自定义主题 | Compose 只读挂载目录 | “更多 → 打开自定义主题目录” |
+| PDF 引擎 | 固定版本 Playwright Chromium | Electron 自带 Chromium |
+
+Web 端不提供本地素材目录能力。需要包含本地相对资源的文档时，请使用
+Desktop；Web 端可使用 Base64/Data URL 或受限公网图片。
+
+## 渲染架构
+
+```mermaid
+flowchart LR
+    A["Markdown 与受限资源"] --> B["Renderer 安全渲染"]
+    B --> C["统一 #write HTML"]
+    D["主题 CSS 与导出配置"] --> C
+    C --> E["共享 Preview Engine"]
+    E --> F["连续预览"]
+    E --> G["快速分页预览"]
+    E --> H["Playwright Chromium"]
+    E --> I["Electron Chromium"]
+    H --> J["Web PDF"]
+    I --> K["Desktop PDF"]
+```
+
+连续预览适合高频编辑；快速预览提供客户端分页反馈；精确预览直接展示
+服务端生成的 PDF，是 Web 最终分页的权威结果。桌面 PDF 复用相同分页
+载荷和运行时。
+
+## 项目目录
+
+```text
+apps/
+  web/                  React 编辑、设置、快速/精确预览与浏览器文件操作
+  server/               Fastify API、Playwright PDF 与容器运行入口
+  desktop/              Electron 主进程、IPC、原生文件和 Windows 打包
+packages/
+  core/                 跨端文档、导出配置和主题协议
+  renderer/             Markdown 到安全 #write HTML 的渲染管线
+  application/          共享渲染、主题注册和图片资源应用服务
+  markdown-echarts/     ECharts YAML 协议、验证与浏览器 SVG 运行时
+  preview-engine/       连续预览、增量分页、媒体适配和 Paged.js 运行时
+themes/                 内置主题与主题清单
+deploy/                 Dockerfile、Compose、Nginx 和部署文档
+docs/                   项目进度与主题开发说明
+scripts/                主题导入等维护脚本
+logos/                  应用图标源文件
+.local/themes/          本地开发和 Compose 自定义主题目录
+```
+
+包依赖保持单向：`core` 提供基础协议和链接分类；`markdown-echarts`
+提供独立图表能力；`renderer` 消费两者生成安全 HTML；`application`
+组合渲染器、主题和资源用例；`preview-engine` 消费渲染结果完成连续或
+分页排版；三个 `apps/*` 只负责平台界面、传输、链接动作与 PDF 适配。
+
+各包的目录和用法：
+
+- [application](packages/application/README.md)
+- [core](packages/core/README.md)
+- [renderer](packages/renderer/README.md)
+- [markdown-echarts](packages/markdown-echarts/README.md)
+- [preview-engine](packages/preview-engine/README.md)

 ## 本地开发

@@ -33,118 +108,69 @@ npm run dev

 默认地址：

- 前端：http://localhost:5173
- 后端：http://localhost:3001
+- Web：http://localhost:5173
+- API：http://localhost:3001
 - 健康检查：http://localhost:3001/api/health

-页面支持直接编辑 Markdown，或选择本地 `.md` 文件。若 Markdown 使用
-相对图片路径，再选择对应的素材目录即可；文件与图片只进入当前渲染请求，
-不写入数据库。桌面端使用原生“打开 Markdown”对话框，并自动从 Markdown
-所在目录安全解析相对图片。
+桌面端开发：

-独立一行的 `![图片标题](地址)` 会显示图片标题。图片与标题作为一个整体
-参与分页；超出单页内容区时，图片会在预留标题高度后等比例缩放，不跨页
-切割。远程图片会先由应用服务受限下载并内嵌，失败时显示可诊断占位。
-
-编辑区和分页预览使用双向比例滚动同步。在任意一侧滚动时，另一侧会跟随到相同的全文阅读进度，方便定位并修改较长文档。
-
-预览工具栏支持滑块和手动百分比输入。缩放比例只改变浏览器显示，不改变纸张尺寸、分页结果或最终 PDF，并会单独保存在浏览器中。
-
-## Mermaid 配置与样式
-
-导出设置可以统一控制整篇文档的 Mermaid 布局、主题、外观和字体：
-
- 布局：Dagre、ELK；
- 主题：Mermaid 11.16.0 提供的 Default、Base、Dark、Forest、Neutral、Neo 和 Redux 系列；
- 外观：Classic、Hand-drawn、Neo；
- 字体：任意本地 CSS 字体族。
-
-未设置时使用 `dagre + default + classic`。单个 Mermaid 区块的 `config` Front Matter 优先于全局导出设置：
-
-````markdown
-```mermaid
---
-config:
-  layout: elk
-  theme: base
-  look: handDrawn
-  fontFamily: Microsoft YaHei
-  themeVariables:
-    primaryColor: "#dbeafe"
-    primaryBorderColor: "#2563eb"
-  flowchart:
-    wrappingWidth: 360
---
-flowchart TB
-  classDef important fill:#fee2e2,stroke:#dc2626
-  A["较长的节点名称<br/>第二行说明"] --> B["下一个节点"]
-  style A fill:#dcfce7,stroke:#16a34a
-  class B important
+```powershell
+npm run desktop:dev
 ```
-````

-`style`、`classDef`、`linkStyle`、`themeVariables` 和图表专属配置均由 Mermaid 官方渲染器处理。原始 `themeCSS`、`securityLevel` 和资源限制属于安全配置，不能由 Markdown 代码块覆盖。
+桌面端目录包和 Windows 安装包：

-ELK 使用官方 `@mermaid-js/layout-elk`，只有图表实际请求 ELK 时才加载核心布局代码。
-
-### Mermaid 长标签
-
-流程图节点标签的默认最大宽度为 320px，可以通过上例中的 `flowchart.wrappingWidth` 调整。
-
-需要自动换行时可以使用 Mermaid Markdown String：
-
-````markdown
-```mermaid
-flowchart LR
-  A["`这是一段可以由 Mermaid 自动换行的较长节点文字`"]
+```powershell
+npm run desktop:package
+npm run make -w @md-to-pdf/desktop
 ```
-````

-个别节点仍需缩小字体时，优先使用 Mermaid 自带的 `classDef`：
+桌面 `package` 和 `make` 会先完整重建内嵌 Web 及全部共享依赖，不能
+复用陈旧的 `apps/web/dist`。产物位于 `apps/desktop/out/v0.5.1/`。
+正式安装包命名为 `md-to-pdf-0.5.1-x86_64-Setup.exe`，同时生成免安装 ZIP；当前发行包
+未配置代码签名。

-````markdown
-```mermaid
-flowchart LR
-  A["较长节点"] --> B["普通节点"]
-  classDef compact font-size:12px;
-  class A compact;
-```
-````
+## 文档与媒体

-## 内置与本地 Typora 主题
+Markdown 支持 Front Matter、表格、任务列表、脚注、highlight.js、
+KaTeX、Mermaid 和安全的 ECharts YAML 围栏。

-公司内部版本已经内置 GitHub、Pixyll 和 Whitey 三套适合打印的白色
-Typora 默认主题。如需从本机 Typora 安装目录刷新本地开发副本，可以运行：
+独立一行的 `![标题](地址)` 会生成带标题的图片块。分页引擎将图片、
+Mermaid、ECharts 及其紧邻标题视为不可拆分媒体块，并按文档顺序串行
+计算。图片的缩放基准是原图先收缩到内容限宽后的高度；需要回填上一页时
+只缩放媒体内容，不缩放标题。这样可利用接近可容纳的页尾空白，同时避免
+跨页、重复重排和后续媒体顺序变化。
+
+ECharts 围栏语法、支持系列和安全边界详见
+[markdown-echarts 包文档](packages/markdown-echarts/README.md)。
+
+## 主题
+
+仓库内置 4 套 Typora 风格主题、4 套红头主题、3 套正式文档主题和
+3 套标书主题，默认使用 Typora Github。主题由版本化
+`theme.json` 清单、主体 CSS、可选基础 CSS、打印 CSS 和资源组成。
+
+- 本地开发与 Compose：将主题目录放入 `.local/themes/`；
+- Desktop：从“更多 → 打开自定义主题目录”打开实际安装目录，再放入主题；
+- 主题格式、安全限制和资源引用详见[主题开发指南](docs/THEMES.md)。
+
+Compose 会把 `.local/themes` 只读挂载到容器。Typora 主题导入脚本只用于
+刷新本地开发副本：

 ```powershell
 npm run theme:import-typora
 ```

-默认从 Typora 安装目录的 `resources\style` 读取基础 CSS、主题和资源，写入 `.local\themes\typora-*`。启动开发服务后，这些主题会出现在预览页面的主题选择器中。
-
-导入工具不会默认覆盖已存在的目标。确认替换本地副本时使用：
-
-```powershell
-npm run theme:import-typora -- --replace
-```
-
-旧副本会移动到 `.local\theme-backups`。
-
-本地主题由动态主题注册器加载，CSS 中的相对字体和图片会通过受限资源接口提供。外部 URL、越界路径和符号链接逃逸会被拒绝。
-
-自定义主题目录、`theme.json`、CSS 组合顺序、资源引用和安全限制详见 [主题开发指南](docs/THEMES.md)。
-
-## Docker Desktop 部署
+## Docker Compose 部署

 ```powershell
 docker compose -f deploy\compose.yaml up --build -d
 ```

-默认访问地址为 http://localhost:8080。Compose 会将 `.local/themes`
-作为只读主题目录挂载；端口、主题目录和 PDF 并发参数的配置方式详见
-[AIO 容器部署说明](deploy/README.md)。
+默认访问 http://localhost:8080。端口、镜像、主题挂载、PDF 并发和超时
+配置详见 [AIO 容器部署说明](deploy/README.md)。

-## 测试与构建
+## 验证

 ```powershell
 npm test
@@ -153,8 +179,18 @@ npm run build
 git diff --check
 ```

-## 隐私原则
+涉及分页或 PDF 的改动还应使用包含中文、长表格、代码、公式、图片、
+Mermaid、ECharts 和分页边界的示例完成 Web、Compose 与 Desktop 端到端
+验证，并检查 PDF 页面渲染结果。

-文档内容与图片仅用于当前渲染和转换请求，不接入数据库或文档历史存储。
-相对路径会规范化并限制在所选目录内；路径穿越、符号链接越界、内网远程
-地址、超出数量或大小上限的图片会被拒绝或替换为失败占位。
+## 安全与隐私
+
+- 不建立 Markdown、图片或 PDF 历史数据库；
+- 文档和资源只在当前请求或当前桌面会话中处理；
+- Markdown 原始 HTML 不执行，输出经过白名单过滤；
+- Mermaid 使用严格安全模式，ECharts 只接受受限纯数据 YAML；
+- 本地资源阻止路径穿越和符号链接越界；
+- 远程资源阻止内网地址，并限制数量、单文件大小、总大小和超时；
+- PDF 页面阻止未授权外部网络访问。
+
+当前实现与交接状态详见 [docs/PROGRESS.md](docs/PROGRESS.md)。
@@ -1,9 +1,24 @@
 # Desktop 桌面端

-`apps/desktop` 是 `v0.4.0` 新增的 Electron 桌面应用。当前已经完成
-Electron 壳、受限 preload、进程内应用服务、原生 Markdown 文件选择、
-同目录图片解析、隐藏分页窗口、Electron Chromium PDF 输出、原生 PDF
-另存为和 Windows 安装包验证。
+`apps/desktop` 是 Electron 桌面应用。当前已经完成 Electron 壳、受限
+preload、进程内应用服务、原生 Markdown 打开与保存、同目录图片解析、
+本地主题目录、隐藏分页窗口、Electron Chromium PDF 输出和 Windows
+安装包。
+
+桌面端会记住上次窗口的位置、尺寸和最大化状态；窗口变化后延迟写入，
+异常退出后也能恢复。恢复时会按当前显示器工作区修正位置与尺寸，避免窗口
+落在屏幕外。Windows 安装包会注册 `.md` 和 `.markdown` 文件关联，
+双击文件或使用“打开方式”会在对应文档窗口中加载文件；同一文件只保留
+一个窗口，其他文件可以同时使用多个窗口。
+
+窗口每次获得焦点时会检查源文件是否被其他程序修改。检测到变化后提示
+重新加载，避免阅读或导出磁盘旧版本。
+
+“打开 Markdown”是顶部独立主操作；新建、保存、另存为、教程、主题示例
+和自定义主题目录统一收纳在“更多”分区菜单中。新建文档未保存时显示“未命名文档”，
+首次保存默认使用一级标题作为文件名；没有一级标题时使用首行文本，并会
+自动清理 Windows 非法文件名字符。“另存为”完成后当前窗口会追踪新文件，
+行为与常见办公软件一致。新文档无需先保存即可直接导出 PDF。

 ## 开发

@@ -26,9 +41,13 @@ npm run desktop:package
 npm run make -w @md-to-pdf/desktop
 ```

+`package` 和 `make` 会先调用根级 `build:web-runtime`，完整重建
+Markdown ECharts、Core、Renderer、Application、Preview Engine 和 Web，
+然后才复制 `apps/web/dist`。不得绕过该链路直接调用 electron-builder。
+
 版本化目录包、NSIS `Setup.exe` 和 ZIP 输出到
-`apps/desktop/out/v0.4.3/`。该目录被 Git 忽略。公司内部分发以
-`md-to-pdf-0.4.3-x86_64-Setup.exe` 为正式安装包，ZIP 作为免安装
+`apps/desktop/out/v0.5.1/`。该目录被 Git 忽略。公司内部分发以
+`md-to-pdf-0.5.1-x86_64-Setup.exe` 为正式安装包，ZIP 作为免安装
 辅助包；当前未配置代码签名，Windows 首次运行可能显示“未知发布者”
 提示。

@@ -47,6 +66,19 @@ NSIS 使用标准辅助安装模式，支持选择当前用户/所有用户安
 Web 静态资源作为只读资源放在 Electron `resources/dist` 下，生产环境通过
 `mdpdf://bundle/` 自定义协议加载。

+## 链接与窗口行为
+
+- 当前文档 `#anchor` 在当前预览中定位；
+- HTTP/HTTPS 链接交给系统默认浏览器；
+- `mailto:` 等系统协议交给操作系统处理；
+- 上级相对路径、本地绝对路径和 `file:` URI 均可尝试通过系统打开；
+- Markdown 文件会提示在当前窗口或新窗口打开；
+- 同一规范化文件路径只允许一个窗口，重复打开时聚焦已有窗口；
+- 本地目标不存在时显示明确错误，不允许链接替换预览 iframe。
+
+发行包只保留 Electron 的简体中文和英文语言包，其他 Chromium 运行时
+组件保持完整，以兼顾安装体积和不同 Windows 图形环境下的运行可靠性。
+
 ## 安全边界

 - 应用窗口和 PDF 窗口均关闭 Node Integration；
@@ -1,4 +1,36 @@
 !macro customInstall
+  WriteRegStr SHCTX \
+    "Software\Classes\MarkdownPdfExporter.Markdown" \
+    "" \
+    "Markdown 文档"
+  WriteRegStr SHCTX \
+    "Software\Classes\MarkdownPdfExporter.Markdown\DefaultIcon" \
+    "" \
+    '"$INSTDIR\md-to-pdf.exe",0'
+  WriteRegStr SHCTX \
+    "Software\Classes\MarkdownPdfExporter.Markdown\shell\open\command" \
+    "" \
+    '"$INSTDIR\md-to-pdf.exe" "%1"'
+  WriteRegStr SHCTX \
+    "Software\Classes\.md\OpenWithProgids" \
+    "MarkdownPdfExporter.Markdown" \
+    ""
+  WriteRegStr SHCTX \
+    "Software\Classes\.markdown\OpenWithProgids" \
+    "MarkdownPdfExporter.Markdown" \
+    ""
+  WriteRegStr SHCTX \
+    "Software\Classes\Applications\md-to-pdf.exe\shell\open\command" \
+    "" \
+    '"$INSTDIR\md-to-pdf.exe" "%1"'
+  WriteRegStr SHCTX \
+    "Software\Classes\Applications\md-to-pdf.exe\SupportedTypes" \
+    ".md" \
+    ""
+  WriteRegStr SHCTX \
+    "Software\Classes\Applications\md-to-pdf.exe\SupportedTypes" \
+    ".markdown" \
+    ""
  CreateDirectory "$SMPROGRAMS\Markdown PDF 导出器"
  CreateShortCut \
    "$SMPROGRAMS\Markdown PDF 导出器\Markdown PDF 导出器.lnk" \
@@ -11,10 +43,22 @@
    "" \
    "$INSTDIR\md-to-pdf.exe"
  StrCpy $launchLink "$INSTDIR\md-to-pdf.exe"
+  System::Call 'shell32::SHChangeNotify(i 0x08000000, i 0, i 0, i 0)'
 !macroend

 !macro customUnInstall
+  DeleteRegValue SHCTX \
+    "Software\Classes\.md\OpenWithProgids" \
+    "MarkdownPdfExporter.Markdown"
+  DeleteRegValue SHCTX \
+    "Software\Classes\.markdown\OpenWithProgids" \
+    "MarkdownPdfExporter.Markdown"
+  DeleteRegKey SHCTX \
+    "Software\Classes\Applications\md-to-pdf.exe"
+  DeleteRegKey SHCTX \
+    "Software\Classes\MarkdownPdfExporter.Markdown"
  Delete "$SMPROGRAMS\Markdown PDF 导出器\Markdown PDF 导出器.lnk"
  RMDir "$SMPROGRAMS\Markdown PDF 导出器"
  Delete "$DESKTOP\Markdown PDF 导出器.lnk"
+  System::Call 'shell32::SHChangeNotify(i 0x08000000, i 0, i 0, i 0)'
 !macroend
@@ -11,6 +11,7 @@ module.exports = {
  productName: "Markdown PDF 导出器",
  copyright: "Copyright © YIXIONG Tech.ltd",
  asar: true,
+  electronLanguages: ["zh-CN", "en-US"],
  directories: {
    output: `out/v${version}`
  },
@@ -29,6 +30,11 @@ module.exports = {
      to: "themes",
      filter: ["**/*"]
    },
+    {
+      from: "../../samples",
+      to: "samples",
+      filter: ["**/*"]
+    },
    {
      from: windowsIcon,
      to: "app.ico"
@@ -1,6 +1,6 @@
 {
  "name": "@md-to-pdf/desktop",
-  "version": "0.4.3",
+  "version": "0.5.1",
  "private": true,
  "productName": "Markdown PDF 导出器",
  "description": "Markdown PDF 导出器桌面端",
@@ -9,12 +9,13 @@
  "main": "dist/main.js",
  "scripts": {
    "build": "npm run clean && npm run build:main && npm run build:preload",
+    "build:embedded-web": "npm --prefix ../.. run build:web-runtime",
    "build:main": "node scripts/build-main.mjs",
    "build:preload": "esbuild src/app-preload.ts src/pdf-preload.ts --bundle --platform=node --format=cjs --external:electron --outdir=dist --out-extension:.js=.cjs",
    "clean": "node -e \"require('node:fs').rmSync('dist',{recursive:true,force:true})\"",
    "dev": "npm run build && wait-on http://localhost:5173 && electron dist/main.js --web-url=http://localhost:5173",
-    "package": "npm run build && electron-builder --dir --config electron-builder.config.cjs --x64",
-    "make": "npm run build && electron-builder --win nsis zip --config electron-builder.config.cjs --x64",
+    "package": "npm run build:embedded-web && npm run build && electron-builder --dir --config electron-builder.config.cjs --x64",
+    "make": "npm run build:embedded-web && npm run build && electron-builder --win nsis zip --config electron-builder.config.cjs --x64",
    "test": "vitest run",
    "typecheck": "tsc -p tsconfig.json --noEmit --pretty false"
  },
@@ -2,16 +2,73 @@ import { contextBridge, ipcRenderer } from "electron";
 import type { PagedDocumentPayload } from "@md-to-pdf/core";
 import type { MarkdownRenderRequest } from "@md-to-pdf/application";
 import {
+  DESKTOP_CONSUME_PENDING_MARKDOWN,
+  DESKTOP_CREATE_NEW_WINDOW,
+  DESKTOP_DISCARD_PENDING_MARKDOWN,
  DESKTOP_GET_THEME_CSS,
  DESKTOP_GENERATE_PDF,
  DESKTOP_LIST_THEMES,
+  DESKTOP_MARKDOWN_OPENED,
  DESKTOP_OPEN_MARKDOWN,
+  DESKTOP_OPEN_DOCUMENT_LINK,
+  DESKTOP_OPEN_THEME_DIRECTORY,
+  DESKTOP_REFRESH_THEMES,
  DESKTOP_RENDER_MARKDOWN,
+  DESKTOP_RESOLVE_WINDOW_CLOSE,
+  DESKTOP_SAVE_MARKDOWN,
+  DESKTOP_SAVE_MARKDOWN_AS,
+  DESKTOP_SET_DOCUMENT_DIRTY,
+  DESKTOP_START_NEW_MARKDOWN,
+  DESKTOP_WINDOW_CLOSE_REQUESTED,
  DESKTOP_SAVE_PDF
 } from "./channels.js";

 contextBridge.exposeInMainWorld("mdToPdfDesktop", {
  openMarkdown: () => ipcRenderer.invoke(DESKTOP_OPEN_MARKDOWN),
+  consumePendingMarkdown: () =>
+    ipcRenderer.invoke(DESKTOP_CONSUME_PENDING_MARKDOWN),
+  discardPendingMarkdown: () =>
+    ipcRenderer.invoke(DESKTOP_DISCARD_PENDING_MARKDOWN),
+  onMarkdownOpened: (
+    listener: (reason: "open" | "reload" | "replace") => void
+  ) => {
+    const handleOpened = (
+      _event: Electron.IpcRendererEvent,
+      reason: "open" | "reload" | "replace"
+    ) => listener(reason);
+    ipcRenderer.on(DESKTOP_MARKDOWN_OPENED, handleOpened);
+    return () =>
+      ipcRenderer.removeListener(DESKTOP_MARKDOWN_OPENED, handleOpened);
+  },
+  startNewMarkdown: () =>
+    ipcRenderer.invoke(DESKTOP_START_NEW_MARKDOWN),
+  createNewWindow: () =>
+    ipcRenderer.invoke(DESKTOP_CREATE_NEW_WINDOW),
+  resolveWindowClose: (close: boolean) =>
+    ipcRenderer.invoke(DESKTOP_RESOLVE_WINDOW_CLOSE, close),
+  onWindowCloseRequested: (listener: () => void) => {
+    const handleCloseRequested = () => listener();
+    ipcRenderer.on(
+      DESKTOP_WINDOW_CLOSE_REQUESTED,
+      handleCloseRequested
+    );
+    return () =>
+      ipcRenderer.removeListener(
+        DESKTOP_WINDOW_CLOSE_REQUESTED,
+        handleCloseRequested
+      );
+  },
+  setDocumentDirty: (dirty: boolean) =>
+    ipcRenderer.invoke(DESKTOP_SET_DOCUMENT_DIRTY, dirty),
+  openDocumentLink: (href: string) =>
+    ipcRenderer.invoke(DESKTOP_OPEN_DOCUMENT_LINK, href),
+  saveMarkdown: (fileName: string, markdown: string) =>
+    ipcRenderer.invoke(DESKTOP_SAVE_MARKDOWN, fileName, markdown),
+  saveMarkdownAs: (fileName: string, markdown: string) =>
+    ipcRenderer.invoke(DESKTOP_SAVE_MARKDOWN_AS, fileName, markdown),
+  openThemeDirectory: () =>
+    ipcRenderer.invoke(DESKTOP_OPEN_THEME_DIRECTORY),
+  refreshThemes: () => ipcRenderer.invoke(DESKTOP_REFRESH_THEMES),
  renderMarkdown: (input: MarkdownRenderRequest) =>
    ipcRenderer.invoke(DESKTOP_RENDER_MARKDOWN, input),
  listThemes: () => ipcRenderer.invoke(DESKTOP_LIST_THEMES),
@@ -2,6 +2,32 @@ export const DESKTOP_RENDER_MARKDOWN =
  "md-to-pdf:desktop:render-markdown";
 export const DESKTOP_OPEN_MARKDOWN =
  "md-to-pdf:desktop:open-markdown";
+export const DESKTOP_CONSUME_PENDING_MARKDOWN =
+  "md-to-pdf:desktop:consume-pending-markdown";
+export const DESKTOP_DISCARD_PENDING_MARKDOWN =
+  "md-to-pdf:desktop:discard-pending-markdown";
+export const DESKTOP_MARKDOWN_OPENED =
+  "md-to-pdf:desktop:markdown-opened";
+export const DESKTOP_SET_DOCUMENT_DIRTY =
+  "md-to-pdf:desktop:set-document-dirty";
+export const DESKTOP_OPEN_DOCUMENT_LINK =
+  "md-to-pdf:desktop:open-document-link";
+export const DESKTOP_START_NEW_MARKDOWN =
+  "md-to-pdf:desktop:start-new-markdown";
+export const DESKTOP_CREATE_NEW_WINDOW =
+  "md-to-pdf:desktop:create-new-window";
+export const DESKTOP_WINDOW_CLOSE_REQUESTED =
+  "md-to-pdf:desktop:window-close-requested";
+export const DESKTOP_RESOLVE_WINDOW_CLOSE =
+  "md-to-pdf:desktop:resolve-window-close";
+export const DESKTOP_SAVE_MARKDOWN =
+  "md-to-pdf:desktop:save-markdown";
+export const DESKTOP_SAVE_MARKDOWN_AS =
+  "md-to-pdf:desktop:save-markdown-as";
+export const DESKTOP_OPEN_THEME_DIRECTORY =
+  "md-to-pdf:desktop:open-theme-directory";
+export const DESKTOP_REFRESH_THEMES =
+  "md-to-pdf:desktop:refresh-themes";
 export const DESKTOP_LIST_THEMES =
  "md-to-pdf:desktop:list-themes";
 export const DESKTOP_GET_THEME_CSS =
@@ -0,0 +1,966 @@
+import {
+  app,
+  BrowserWindow,
+  dialog,
+  ipcMain,
+  screen,
+  shell,
+  type IpcMainInvokeEvent,
+  type Rectangle
+} from "electron";
+import {
+  mkdir,
+  realpath,
+  stat,
+  writeFile
+} from "node:fs/promises";
+import path from "node:path";
+import {
+  MAXIMUM_MARKDOWN_LENGTH,
+  type ApplicationService
+} from "@md-to-pdf/application";
+import {
+  DESKTOP_CONSUME_PENDING_MARKDOWN,
+  DESKTOP_CREATE_NEW_WINDOW,
+  DESKTOP_DISCARD_PENDING_MARKDOWN,
+  DESKTOP_GENERATE_PDF,
+  DESKTOP_GET_THEME_CSS,
+  DESKTOP_LIST_THEMES,
+  DESKTOP_MARKDOWN_OPENED,
+  DESKTOP_OPEN_DOCUMENT_LINK,
+  DESKTOP_OPEN_MARKDOWN,
+  DESKTOP_OPEN_THEME_DIRECTORY,
+  DESKTOP_REFRESH_THEMES,
+  DESKTOP_RENDER_MARKDOWN,
+  DESKTOP_RESOLVE_WINDOW_CLOSE,
+  DESKTOP_SAVE_MARKDOWN,
+  DESKTOP_SAVE_MARKDOWN_AS,
+  DESKTOP_SAVE_PDF,
+  DESKTOP_SET_DOCUMENT_DIRTY,
+  DESKTOP_START_NEW_MARKDOWN,
+  DESKTOP_WINDOW_CLOSE_REQUESTED
+} from "./channels.js";
+import {
+  parseMarkdownRenderRequest,
+  parseThemeId
+} from "./application-contract.js";
+import { ElectronPdfGenerator } from "./electron-pdf-generator.js";
+import { resolveDesktopDocumentLinkAction } from "./desktop-document-link.js";
+import {
+  isMarkdownFilePath,
+  createMarkdownDocumentKey,
+  readMarkdownFileSnapshot,
+  type MarkdownFileSnapshot
+} from "./markdown-file.js";
+import { parsePagedDocumentPayload } from "./pdf-contract.js";
+import {
+  loadWindowState,
+  resolveWindowBounds,
+  saveWindowState,
+  type WindowState
+} from "./window-state.js";
+import { getWindowCloseDecision } from "./window-close-policy.js";
+
+const DEFAULT_WINDOW_SIZE = { width: 1440, height: 960 };
+const MINIMUM_WINDOW_SIZE = { width: 1024, height: 720 };
+const CASCADE_OFFSET = 32;
+const FOCUS_CHECK_SUPPRESSION_MS = 800;
+
+type MarkdownOpenReason = "open" | "reload" | "replace";
+
+interface PendingOpenedMarkdown {
+  snapshot: MarkdownFileSnapshot;
+  reason: MarkdownOpenReason;
+}
+
+interface WindowSession {
+  window: BrowserWindow;
+  dirty: boolean;
+  allowClose: boolean;
+  closeRequestPending: boolean;
+  currentFilePath: string | undefined;
+  documentKey: string | undefined;
+  documentRoot: string | undefined;
+  baselineHash: string | undefined;
+  pendingOpenedMarkdown: PendingOpenedMarkdown | undefined;
+  focusCheckRunning: boolean;
+  suppressFocusCheckUntil: number;
+}
+
+export interface DesktopApplicationControllerOptions {
+  applicationService: ApplicationService;
+  applicationUrl: string;
+  renderUrl: string;
+  preloadPath: string;
+  pdfPreloadPath: string;
+  iconPath: string;
+  themeDirectory: string;
+  windowStatePath: string;
+}
+
+function focusWindow(window: BrowserWindow) {
+  if (window.isDestroyed()) {
+    return;
+  }
+  if (window.isMinimized()) {
+    window.restore();
+  }
+  window.show();
+  window.focus();
+}
+
+export class DesktopApplicationController {
+  readonly #applicationService: ApplicationService;
+  readonly #applicationUrl: string;
+  readonly #applicationOrigin: string;
+  readonly #preloadPath: string;
+  readonly #iconPath: string;
+  readonly #themeDirectory: string;
+  readonly #windowStatePath: string;
+  readonly #pdfGenerator: ElectronPdfGenerator;
+  readonly #sessions = new Map<number, WindowSession>();
+  readonly #documentSessions = new Map<string, WindowSession>();
+  #primarySession: WindowSession | undefined;
+  #savedWindowState: WindowState | undefined;
+  #saveWindowStateTimer: NodeJS.Timeout | undefined;
+  #pendingWindowStateWrite = Promise.resolve();
+  #latestWindowState: WindowState | undefined;
+
+  constructor(options: DesktopApplicationControllerOptions) {
+    this.#applicationService = options.applicationService;
+    this.#applicationUrl = options.applicationUrl;
+    this.#applicationOrigin = new URL(options.applicationUrl).origin;
+    this.#preloadPath = options.preloadPath;
+    this.#iconPath = options.iconPath;
+    this.#themeDirectory = options.themeDirectory;
+    this.#windowStatePath = options.windowStatePath;
+    this.#pdfGenerator = new ElectronPdfGenerator({
+      renderUrl: options.renderUrl,
+      preloadPath: options.pdfPreloadPath
+    });
+  }
+
+  async initialize() {
+    this.#savedWindowState = await loadWindowState(
+      this.#windowStatePath
+    );
+    this.#registerIpcHandlers();
+  }
+
+  async createWindow(filePath?: string) {
+    let pendingSnapshot: MarkdownFileSnapshot | undefined;
+    if (filePath) {
+      pendingSnapshot = await readMarkdownFileSnapshot(
+        filePath,
+        MAXIMUM_MARKDOWN_LENGTH
+      );
+      const existing = this.#findDocumentSession(
+        pendingSnapshot.documentKey
+      );
+      if (existing) {
+        focusWindow(existing.window);
+        return existing.window;
+      }
+    }
+    return this.#createWindow(pendingSnapshot);
+  }
+
+  async #createWindow(
+    pendingSnapshot?: MarkdownFileSnapshot,
+    startBlank = false
+  ) {
+    const isPrimary = !this.#primarySession;
+    const restoredWindowState = isPrimary
+      ? this.#latestWindowState ?? this.#savedWindowState
+      : undefined;
+    const initialBounds = this.#resolveInitialBounds(isPrimary);
+    const window = new BrowserWindow({
+      title: `Markdown PDF 导出器 v${app.getVersion()}`,
+      icon: this.#iconPath,
+      ...initialBounds,
+      minWidth: Math.min(
+        MINIMUM_WINDOW_SIZE.width,
+        initialBounds.width
+      ),
+      minHeight: Math.min(
+        MINIMUM_WINDOW_SIZE.height,
+        initialBounds.height
+      ),
+      autoHideMenuBar: true,
+      show: false,
+      webPreferences: {
+        contextIsolation: true,
+        nodeIntegration: false,
+        sandbox: true,
+        preload: this.#preloadPath
+      }
+    });
+    const session: WindowSession = {
+      window,
+      dirty: false,
+      allowClose: false,
+      closeRequestPending: false,
+      currentFilePath: undefined,
+      documentKey: undefined,
+      documentRoot: undefined,
+      baselineHash: undefined,
+      pendingOpenedMarkdown: pendingSnapshot
+        ? { snapshot: pendingSnapshot, reason: "open" }
+        : undefined,
+      focusCheckRunning: false,
+      suppressFocusCheckUntil: 0
+    };
+    this.#sessions.set(window.webContents.id, session);
+    if (isPrimary) {
+      this.#primarySession = session;
+      this.#captureWindowState();
+      this.#bindPrimaryWindowState(session);
+    }
+    this.#lockDownWindow(window);
+    this.#bindWindowLifecycle(session);
+
+    window.once("ready-to-show", () => {
+      if (
+        isPrimary &&
+        restoredWindowState?.maximized &&
+        !window.isDestroyed()
+      ) {
+        window.maximize();
+      }
+      window.show();
+    });
+    const targetUrl = new URL(this.#applicationUrl);
+    if (startBlank) {
+      targetUrl.searchParams.set("new", "1");
+    }
+    await window.loadURL(targetUrl.href);
+    return window;
+  }
+
+  async openExternalMarkdown(filePath: string) {
+    const snapshot = await readMarkdownFileSnapshot(
+      filePath,
+      MAXIMUM_MARKDOWN_LENGTH
+    );
+    const existing = this.#findDocumentSession(snapshot.documentKey);
+    if (existing) {
+      focusWindow(existing.window);
+      return;
+    }
+    await this.#createWindow(snapshot);
+  }
+
+  focusMostRecentWindow() {
+    const focused = BrowserWindow.getFocusedWindow();
+    const focusedSession = focused
+      ? [...this.#sessions.values()].find(
+          (session) => session.window === focused
+        )
+      : undefined;
+    if (focusedSession) {
+      focusWindow(focusedSession.window);
+      return true;
+    }
+    const session = [...this.#sessions.values()].at(-1);
+    if (!session) {
+      return false;
+    }
+    focusWindow(session.window);
+    return true;
+  }
+
+  async flushWindowState() {
+    if (this.#saveWindowStateTimer) {
+      clearTimeout(this.#saveWindowStateTimer);
+      this.#saveWindowStateTimer = undefined;
+    }
+    this.#captureWindowState();
+    await this.#persistWindowState();
+  }
+
+  async closeResources() {
+    await this.#pdfGenerator.close();
+  }
+
+  #resolveInitialBounds(isPrimary: boolean): Rectangle {
+    const displays = screen
+      .getAllDisplays()
+      .map((display) => display.workArea);
+    const primaryWorkArea = screen.getPrimaryDisplay().workArea;
+    if (isPrimary) {
+      return resolveWindowBounds(
+        (this.#latestWindowState ?? this.#savedWindowState)?.bounds,
+        displays,
+        primaryWorkArea,
+        DEFAULT_WINDOW_SIZE,
+        MINIMUM_WINDOW_SIZE
+      );
+    }
+
+    const reference =
+      BrowserWindow.getFocusedWindow() ??
+      [...this.#sessions.values()].at(-1)?.window;
+    const referenceBounds =
+      reference && !reference.isDestroyed()
+        ? reference.getNormalBounds()
+        : primaryWorkArea;
+    return resolveWindowBounds(
+      {
+        x: referenceBounds.x + CASCADE_OFFSET,
+        y: referenceBounds.y + CASCADE_OFFSET,
+        width: referenceBounds.width,
+        height: referenceBounds.height
+      },
+      displays,
+      primaryWorkArea,
+      DEFAULT_WINDOW_SIZE,
+      MINIMUM_WINDOW_SIZE
+    );
+  }
+
+  #lockDownWindow(window: BrowserWindow) {
+    window.webContents.setWindowOpenHandler(() => ({ action: "deny" }));
+    window.webContents.on("will-navigate", (event, targetUrl) => {
+      if (new URL(targetUrl).origin !== this.#applicationOrigin) {
+        event.preventDefault();
+      }
+    });
+    const applicationSession = window.webContents.session;
+    applicationSession.setPermissionCheckHandler(() => false);
+    applicationSession.setPermissionRequestHandler(
+      (_webContents, _permission, callback) => callback(false)
+    );
+  }
+
+  #bindWindowLifecycle(session: WindowSession) {
+    const { window } = session;
+    const webContentsId = window.webContents.id;
+    window.on("focus", () => {
+      void this.#checkForExternalChange(session);
+    });
+    window.on("close", (event) => {
+      const decision = getWindowCloseDecision(session);
+      if (decision === "allow") {
+        return;
+      }
+      event.preventDefault();
+      if (decision === "request") {
+        session.closeRequestPending = true;
+        session.window.webContents.send(
+          DESKTOP_WINDOW_CLOSE_REQUESTED
+        );
+      }
+    });
+    window.on("closed", () => {
+      const wasPrimary = this.#primarySession === session;
+      this.#sessions.delete(webContentsId);
+      if (
+        session.documentKey &&
+        this.#documentSessions.get(session.documentKey) === session
+      ) {
+        this.#documentSessions.delete(session.documentKey);
+      }
+      if (wasPrimary) {
+        this.#promotePrimarySession();
+      }
+    });
+  }
+
+  #promotePrimarySession() {
+    const nextPrimary = [...this.#sessions.values()]
+      .filter((session) => !session.window.isDestroyed())
+      .at(-1);
+    this.#primarySession = nextPrimary;
+    if (!nextPrimary) {
+      return;
+    }
+    this.#bindPrimaryWindowState(nextPrimary);
+    this.#captureWindowState();
+  }
+
+  async #checkForExternalChange(session: WindowSession) {
+    if (
+      session.focusCheckRunning ||
+      session.window.isDestroyed() ||
+      !session.currentFilePath ||
+      !session.baselineHash ||
+      Date.now() < session.suppressFocusCheckUntil
+    ) {
+      return;
+    }
+    session.focusCheckRunning = true;
+    try {
+      let snapshot: MarkdownFileSnapshot;
+      try {
+        snapshot = await readMarkdownFileSnapshot(
+          session.currentFilePath,
+          MAXIMUM_MARKDOWN_LENGTH
+        );
+      } catch (error) {
+        await dialog.showMessageBox(session.window, {
+          type: "error",
+          title: "无法检查文件",
+          message: "当前 Markdown 文件已被删除或无法读取。",
+          detail:
+            error instanceof Error ? error.message : "未知文件错误",
+          buttons: ["确定"],
+          defaultId: 0,
+          noLink: true
+        });
+        return;
+      }
+      if (snapshot.contentHash === session.baselineHash) {
+        return;
+      }
+
+      const result = await dialog.showMessageBox(session.window, {
+        type: "warning",
+        title: "文件已在外部修改",
+        message: session.dirty
+          ? "文件已在外部修改，重新载入会丢弃当前未保存内容。"
+          : "文件已在外部修改，是否重新载入？",
+        detail: snapshot.filePath,
+        buttons: ["暂不载入", "重新载入"],
+        defaultId: 1,
+        cancelId: 0,
+        noLink: true
+      });
+      if (result.response === 1) {
+        session.baselineHash = snapshot.contentHash;
+        session.pendingOpenedMarkdown = {
+          snapshot,
+          reason: "reload"
+        };
+        session.window.webContents.send(
+          DESKTOP_MARKDOWN_OPENED,
+          "reload"
+        );
+      }
+    } finally {
+      session.focusCheckRunning = false;
+      session.suppressFocusCheckUntil =
+        Date.now() + FOCUS_CHECK_SUPPRESSION_MS;
+    }
+  }
+
+  #bindPrimaryWindowState(session: WindowSession) {
+    const schedule = () => {
+      this.#captureWindowState();
+      if (this.#saveWindowStateTimer) {
+        clearTimeout(this.#saveWindowStateTimer);
+      }
+      this.#saveWindowStateTimer = setTimeout(() => {
+        this.#saveWindowStateTimer = undefined;
+        void this.#persistWindowState();
+      }, 2_000);
+    };
+    session.window.on("move", schedule);
+    session.window.on("resize", schedule);
+    session.window.on("maximize", schedule);
+    session.window.on("unmaximize", schedule);
+  }
+
+  #captureWindowState() {
+    const window = this.#primarySession?.window;
+    if (!window || window.isDestroyed()) {
+      return;
+    }
+    this.#latestWindowState = {
+      version: 1,
+      bounds: window.getNormalBounds(),
+      maximized: window.isMaximized()
+    };
+  }
+
+  #persistWindowState() {
+    if (!this.#latestWindowState) {
+      return this.#pendingWindowStateWrite;
+    }
+    const state = structuredClone(this.#latestWindowState);
+    this.#pendingWindowStateWrite = this.#pendingWindowStateWrite
+      .catch(() => undefined)
+      .then(() => saveWindowState(this.#windowStatePath, state))
+      .catch((error: unknown) => {
+        console.warn("无法保存窗口状态", error);
+      });
+    return this.#pendingWindowStateWrite;
+  }
+
+  #findDocumentSession(documentKey: string) {
+    const committed = this.#documentSessions.get(documentKey);
+    if (committed) {
+      return committed;
+    }
+    return [...this.#sessions.values()].find(
+      (session) =>
+        session.pendingOpenedMarkdown?.snapshot.documentKey ===
+        documentKey
+    );
+  }
+
+  #getSession(event: IpcMainInvokeEvent) {
+    const session = this.#sessions.get(event.sender.id);
+    let origin: string | undefined;
+    try {
+      origin = event.senderFrame
+        ? new URL(event.senderFrame.url).origin
+        : undefined;
+    } catch {
+      origin = undefined;
+    }
+    if (
+      !session ||
+      event.sender !== session.window.webContents ||
+      origin !== this.#applicationOrigin
+    ) {
+      throw new Error("拒绝未授权的桌面请求");
+    }
+    return session;
+  }
+
+  #commitSnapshot(
+    session: WindowSession,
+    snapshot: MarkdownFileSnapshot
+  ) {
+    if (
+      session.documentKey &&
+      this.#documentSessions.get(session.documentKey) === session
+    ) {
+      this.#documentSessions.delete(session.documentKey);
+    }
+    session.currentFilePath = snapshot.filePath;
+    session.documentKey = snapshot.documentKey;
+    session.documentRoot = path.dirname(snapshot.filePath);
+    session.baselineHash = snapshot.contentHash;
+    session.dirty = false;
+    this.#documentSessions.set(snapshot.documentKey, session);
+  }
+
+  #clearDocument(session: WindowSession) {
+    if (
+      session.documentKey &&
+      this.#documentSessions.get(session.documentKey) === session
+    ) {
+      this.#documentSessions.delete(session.documentKey);
+    }
+    session.currentFilePath = undefined;
+    session.documentKey = undefined;
+    session.documentRoot = undefined;
+    session.baselineHash = undefined;
+    session.pendingOpenedMarkdown = undefined;
+    session.dirty = false;
+  }
+
+  #registerIpcHandlers() {
+    ipcMain.handle(
+      DESKTOP_OPEN_DOCUMENT_LINK,
+      async (event, unsafeHref: unknown) => {
+        const session = this.#getSession(event);
+        if (
+          typeof unsafeHref !== "string" ||
+          unsafeHref.length === 0 ||
+          unsafeHref.length > 8_192
+        ) {
+          throw new Error("文档链接无效");
+        }
+        try {
+          await this.#openDocumentLink(session, unsafeHref);
+        } catch (error) {
+          await dialog.showMessageBox(session.window, {
+            type: "error",
+            title: "无法打开链接",
+            message:
+              error instanceof Error
+                ? error.message
+                : "无法打开文档链接",
+            detail: unsafeHref,
+            buttons: ["确定"],
+            defaultId: 0,
+            noLink: true
+          });
+        }
+      }
+    );
+
+    ipcMain.handle(DESKTOP_OPEN_MARKDOWN, async (event) => {
+      const session = this.#getSession(event);
+      const selection = await dialog.showOpenDialog(session.window, {
+        title: "打开 Markdown",
+        properties: ["openFile"],
+        filters: [
+          { name: "Markdown 文件", extensions: ["md", "markdown"] }
+        ]
+      });
+      const filePath = selection.filePaths[0];
+      if (selection.canceled || !filePath) {
+        return undefined;
+      }
+      const snapshot = await readMarkdownFileSnapshot(
+        filePath,
+        MAXIMUM_MARKDOWN_LENGTH
+      );
+      const existing = this.#findDocumentSession(snapshot.documentKey);
+      if (existing && existing !== session) {
+        focusWindow(existing.window);
+        return undefined;
+      }
+      this.#commitSnapshot(session, snapshot);
+      return snapshot.document;
+    });
+
+    ipcMain.handle(DESKTOP_CONSUME_PENDING_MARKDOWN, async (event) => {
+      const session = this.#getSession(event);
+      const pending = session.pendingOpenedMarkdown;
+      session.pendingOpenedMarkdown = undefined;
+      if (!pending) {
+        return undefined;
+      }
+      this.#commitSnapshot(session, pending.snapshot);
+      return pending.snapshot.document;
+    });
+
+    ipcMain.handle(DESKTOP_DISCARD_PENDING_MARKDOWN, async (event) => {
+      const session = this.#getSession(event);
+      session.pendingOpenedMarkdown = undefined;
+    });
+
+    ipcMain.handle(DESKTOP_START_NEW_MARKDOWN, async (event) => {
+      this.#clearDocument(this.#getSession(event));
+    });
+
+    ipcMain.handle(DESKTOP_CREATE_NEW_WINDOW, async (event) => {
+      this.#getSession(event);
+      await this.#createWindow(undefined, true);
+    });
+
+    ipcMain.handle(
+      DESKTOP_RESOLVE_WINDOW_CLOSE,
+      async (event, unsafeClose: unknown) => {
+        if (typeof unsafeClose !== "boolean") {
+          throw new Error("窗口关闭决策无效");
+        }
+        const session = this.#getSession(event);
+        session.closeRequestPending = false;
+        session.suppressFocusCheckUntil =
+          Date.now() + FOCUS_CHECK_SUPPRESSION_MS;
+        if (unsafeClose && !session.window.isDestroyed()) {
+          session.allowClose = true;
+          session.window.close();
+        }
+      }
+    );
+
+    ipcMain.handle(
+      DESKTOP_SET_DOCUMENT_DIRTY,
+      async (event, unsafeDirty: unknown) => {
+        if (typeof unsafeDirty !== "boolean") {
+          throw new Error("文档修改状态无效");
+        }
+        this.#getSession(event).dirty = unsafeDirty;
+      }
+    );
+
+    const saveMarkdown = async (
+      event: IpcMainInvokeEvent,
+      unsafeFileName: unknown,
+      unsafeMarkdown: unknown,
+      forceSaveAs: boolean
+    ) => {
+        const session = this.#getSession(event);
+        if (
+          typeof unsafeFileName !== "string" ||
+          unsafeFileName.length === 0 ||
+          unsafeFileName.length > 500 ||
+          typeof unsafeMarkdown !== "string" ||
+          unsafeMarkdown.length > MAXIMUM_MARKDOWN_LENGTH
+        ) {
+          throw new Error("Markdown 保存参数无效");
+        }
+
+        let targetPath = session.currentFilePath;
+        if (forceSaveAs || !targetPath) {
+          const suggestedName = /\.(?:md|markdown)$/iu.test(
+            path.basename(unsafeFileName)
+          )
+            ? path.basename(unsafeFileName)
+            : `${path.basename(unsafeFileName)}.md`;
+          const selection = await dialog.showSaveDialog(session.window, {
+            title: forceSaveAs
+              ? "另存为 Markdown"
+              : "保存 Markdown",
+            defaultPath:
+              forceSaveAs && session.currentFilePath
+                ? session.currentFilePath
+                : path.join(app.getPath("documents"), suggestedName),
+            filters: [
+              {
+                name: "Markdown 文件",
+                extensions: ["md", "markdown"]
+              }
+            ]
+          });
+          if (selection.canceled || !selection.filePath) {
+            return undefined;
+          }
+          targetPath = /\.(?:md|markdown)$/iu.test(selection.filePath)
+            ? selection.filePath
+            : `${selection.filePath}.md`;
+        }
+
+        let targetKey = createMarkdownDocumentKey(
+          path.resolve(targetPath)
+        );
+        try {
+          targetKey = createMarkdownDocumentKey(
+            await realpath(targetPath)
+          );
+        } catch (error) {
+          if (
+            !(
+              error instanceof Error &&
+              "code" in error &&
+              error.code === "ENOENT"
+            )
+          ) {
+            throw error;
+          }
+        }
+        const existing = this.#findDocumentSession(targetKey);
+        if (existing && existing !== session) {
+          focusWindow(existing.window);
+          throw new Error("该 Markdown 已在另一个窗口中打开");
+        }
+
+        await writeFile(targetPath, unsafeMarkdown, "utf8");
+        const snapshot = await readMarkdownFileSnapshot(
+          targetPath,
+          MAXIMUM_MARKDOWN_LENGTH
+        );
+        const canonicalExisting = this.#findDocumentSession(
+          snapshot.documentKey
+        );
+        if (canonicalExisting && canonicalExisting !== session) {
+          focusWindow(canonicalExisting.window);
+          throw new Error("该 Markdown 已在另一个窗口中打开");
+        }
+        this.#commitSnapshot(session, snapshot);
+        return { fileName: snapshot.document.fileName };
+      };
+
+    ipcMain.handle(
+      DESKTOP_SAVE_MARKDOWN,
+      (event, unsafeFileName: unknown, unsafeMarkdown: unknown) =>
+        saveMarkdown(
+          event,
+          unsafeFileName,
+          unsafeMarkdown,
+          false
+        )
+    );
+    ipcMain.handle(
+      DESKTOP_SAVE_MARKDOWN_AS,
+      (event, unsafeFileName: unknown, unsafeMarkdown: unknown) =>
+        saveMarkdown(
+          event,
+          unsafeFileName,
+          unsafeMarkdown,
+          true
+        )
+    );
+
+    ipcMain.handle(DESKTOP_OPEN_THEME_DIRECTORY, async (event) => {
+      this.#getSession(event);
+      await mkdir(this.#themeDirectory, { recursive: true });
+      const errorMessage = await shell.openPath(this.#themeDirectory);
+      if (errorMessage) {
+        throw new Error(
+          `无法打开自定义主题目录：${errorMessage}`
+        );
+      }
+      return this.#themeDirectory;
+    });
+
+    ipcMain.handle(DESKTOP_REFRESH_THEMES, async (event) => {
+      this.#getSession(event);
+      this.#applicationService.invalidateThemes();
+    });
+
+    ipcMain.handle(
+      DESKTOP_RENDER_MARKDOWN,
+      async (event, unsafeRequest: unknown) => {
+        const session = this.#getSession(event);
+        return this.#applicationService.render(
+          parseMarkdownRenderRequest(unsafeRequest),
+          session.documentRoot
+            ? {
+                localRoot: session.documentRoot,
+                allowUnrestrictedLocalFiles: true
+              }
+            : {}
+        );
+      }
+    );
+
+    ipcMain.handle(DESKTOP_LIST_THEMES, async (event) => {
+      this.#getSession(event);
+      return this.#applicationService.listThemes();
+    });
+
+    ipcMain.handle(
+      DESKTOP_GET_THEME_CSS,
+      async (event, unsafeThemeId: unknown) => {
+        this.#getSession(event);
+        const css = await this.#applicationService.getThemeCss(
+          parseThemeId(unsafeThemeId)
+        );
+        if (css === undefined) {
+          throw new Error("未找到指定主题");
+        }
+        return css;
+      }
+    );
+
+    ipcMain.handle(
+      DESKTOP_GENERATE_PDF,
+      async (event, unsafePayload: unknown) => {
+        this.#getSession(event);
+        const result = await this.#pdfGenerator.generate(
+          parsePagedDocumentPayload(unsafePayload)
+        );
+        return {
+          pdf: result.pdf,
+          pageCount: result.pageCount,
+          echartsErrors: result.echartsErrors,
+          mermaidErrors: result.mermaidErrors
+        };
+      }
+    );
+
+    ipcMain.handle(
+      DESKTOP_SAVE_PDF,
+      async (
+        event,
+        unsafeFileName: unknown,
+        unsafePdf: unknown
+      ) => {
+        const session = this.#getSession(event);
+        if (
+          typeof unsafeFileName !== "string" ||
+          unsafeFileName.length === 0 ||
+          unsafeFileName.length > 500 ||
+          !(unsafePdf instanceof Uint8Array) ||
+          unsafePdf.byteLength === 0 ||
+          unsafePdf.byteLength > 200 * 1024 * 1024
+        ) {
+          throw new Error("PDF 保存参数无效");
+        }
+        const suggestedName = path.basename(unsafeFileName).endsWith(
+          ".pdf"
+        )
+          ? path.basename(unsafeFileName)
+          : `${path.basename(unsafeFileName)}.pdf`;
+        const selection = await dialog.showSaveDialog(session.window, {
+          title: "导出 PDF",
+          defaultPath: path.join(
+            app.getPath("documents"),
+            suggestedName
+          ),
+          filters: [{ name: "PDF 文件", extensions: ["pdf"] }]
+        });
+        if (selection.canceled || !selection.filePath) {
+          return false;
+        }
+        await writeFile(selection.filePath, unsafePdf);
+        return true;
+      }
+    );
+  }
+
+  async #openDocumentLink(
+    session: WindowSession,
+    href: string
+  ) {
+    const action = resolveDesktopDocumentLinkAction(
+      href,
+      session.currentFilePath
+    );
+    if (action.type === "ignore" || action.type === "anchor") {
+      return;
+    }
+    if (action.type === "external") {
+      await shell.openExternal(action.href);
+      return;
+    }
+
+    let targetStats;
+    try {
+      targetStats = await stat(action.filePath);
+    } catch (error) {
+      if (
+        error instanceof Error &&
+        "code" in error &&
+        error.code === "ENOENT"
+      ) {
+        await dialog.showMessageBox(session.window, {
+          type: "warning",
+          title: "找不到文件",
+          message: "链接指向的本地文件不存在。",
+          detail: action.filePath,
+          buttons: ["确定"],
+          defaultId: 0,
+          noLink: true
+        });
+        return;
+      }
+      throw error;
+    }
+
+    if (
+      targetStats.isFile() &&
+      isMarkdownFilePath(action.filePath)
+    ) {
+      const snapshot = await readMarkdownFileSnapshot(
+        action.filePath,
+        MAXIMUM_MARKDOWN_LENGTH
+      );
+      const existing = this.#findDocumentSession(
+        snapshot.documentKey
+      );
+      if (existing) {
+        focusWindow(existing.window);
+        return;
+      }
+
+      const result = await dialog.showMessageBox(session.window, {
+        type: "question",
+        title: "打开 Markdown",
+        message: `如何打开 ${snapshot.document.fileName}？`,
+        detail: session.dirty
+          ? "当前窗口有未保存修改；选择当前窗口会放弃这些修改。"
+          : snapshot.filePath,
+        buttons: ["取消", "当前窗口打开", "新窗口打开"],
+        defaultId: 2,
+        cancelId: 0,
+        noLink: true
+      });
+      if (result.response === 1) {
+        session.pendingOpenedMarkdown = {
+          snapshot,
+          reason: "replace"
+        };
+        session.window.webContents.send(
+          DESKTOP_MARKDOWN_OPENED,
+          "replace"
+        );
+      } else if (result.response === 2) {
+        await this.#createWindow(snapshot);
+      }
+      return;
+    }
+
+    const errorMessage = await shell.openPath(action.filePath);
+    if (errorMessage) {
+      throw new Error(`系统无法打开该路径：${errorMessage}`);
+    }
+  }
+}
@@ -0,0 +1,68 @@
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { classifyDocumentLink } from "@md-to-pdf/core";
+
+export type DesktopDocumentLinkAction =
+  | {
+      type: "anchor";
+      href: string;
+    }
+  | {
+      type: "external";
+      href: string;
+    }
+  | {
+      type: "local";
+      filePath: string;
+    }
+  | {
+      type: "ignore";
+    };
+
+function decodeLocalPath(href: string) {
+  const pathOnly = href.split(/[?#]/u, 1)[0] ?? "";
+  try {
+    return decodeURIComponent(pathOnly);
+  } catch {
+    throw new Error("本地链接的 URL 编码无效");
+  }
+}
+
+export function resolveDesktopDocumentLinkAction(
+  href: string,
+  markdownFilePath?: string
+): DesktopDocumentLinkAction {
+  const link = classifyDocumentLink(href);
+  if (link.kind === "anchor") {
+    return { type: "anchor", href: link.normalizedHref };
+  }
+  if (link.kind === "network" || link.kind === "protocol") {
+    return { type: "external", href: link.normalizedHref };
+  }
+  if (link.kind !== "local") {
+    return { type: "ignore" };
+  }
+
+  if (link.scheme === "file") {
+    try {
+      return {
+        type: "local",
+        filePath: path.normalize(fileURLToPath(new URL(link.href)))
+      };
+    } catch {
+      throw new Error("file: 链接格式无效");
+    }
+  }
+
+  const decoded = decodeLocalPath(link.href);
+  if (path.isAbsolute(decoded) || /^[a-z]:[\\/]/iu.test(decoded)) {
+    return { type: "local", filePath: path.normalize(decoded) };
+  }
+  if (!markdownFilePath) {
+    throw new Error("当前文档尚未保存，无法解析相对本地链接");
+  }
+  return {
+    type: "local",
+    filePath: path.resolve(path.dirname(markdownFilePath), decoded)
+  };
+}
@@ -1,44 +1,36 @@
 import {
  app,
-  BrowserWindow,
-  dialog,
-  ipcMain,
  Menu,
  net,
  protocol,
-  session,
-  type IpcMainInvokeEvent
+  session
 } from "electron";
-import { access, readFile, writeFile } from "node:fs/promises";
+import { access, mkdir } from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
 import {
  createApplicationService,
  type ApplicationService
 } from "@md-to-pdf/application";
+import { parseThemeResourceUrl } from "./application-contract.js";
 import {
-  DESKTOP_GET_THEME_CSS,
-  DESKTOP_GENERATE_PDF,
-  DESKTOP_LIST_THEMES,
-  DESKTOP_OPEN_MARKDOWN,
-  DESKTOP_RENDER_MARKDOWN,
-  DESKTOP_SAVE_PDF
-} from "./channels.js";
+  DesktopApplicationController
+} from "./desktop-application-controller.js";
+import { DESKTOP_PDF_PARTITION } from "./electron-pdf-generator.js";
 import {
-  parseMarkdownRenderRequest,
-  parseThemeId,
-  parseThemeResourceUrl
-} from "./application-contract.js";
-import {
-  DESKTOP_PDF_PARTITION,
-  ElectronPdfGenerator
-} from "./electron-pdf-generator.js";
-import { parsePagedDocumentPayload } from "./pdf-contract.js";
+  findMarkdownFileArgument,
+  isMarkdownFilePath
+} from "./markdown-file.js";

 const APP_SCHEME = "mdpdf";
 const APP_HOST = "bundle";
 const THEME_HOST = "theme";
 const currentDirectory = path.dirname(fileURLToPath(import.meta.url));
+let applicationController: DesktopApplicationController | undefined;
+let pendingExternalMarkdownPath = findMarkdownFileArgument(
+  process.argv,
+  process.cwd()
+);

 protocol.registerSchemesAsPrivileged([
  {
@@ -91,15 +83,31 @@ function encodeThemeAssetPath(assetPath: string) {
    .join("/");
 }

+function dispatchExternalMarkdown(filePath: string) {
+  if (!applicationController) {
+    pendingExternalMarkdownPath = filePath;
+    return;
+  }
+  void applicationController.openExternalMarkdown(filePath).catch(
+    (error: unknown) => {
+      console.warn("无法打开系统传入的 Markdown 文件", error);
+    }
+  );
+}
+
+function getDesktopThemeDirectory() {
+  return app.isPackaged
+    ? path.join(app.getPath("userData"), "themes")
+    : path.resolve(currentDirectory, "../../..", ".local", "themes");
+}
+
 function createDesktopApplicationService() {
  const projectRoot = path.resolve(currentDirectory, "../../..");
  return createApplicationService({
    bundledRoot: app.isPackaged
      ? path.join(process.resourcesPath, "themes")
      : path.join(projectRoot, "themes"),
-    localRoot: app.isPackaged
-      ? path.join(app.getPath("userData"), "themes")
-      : path.join(projectRoot, ".local", "themes"),
+    localRoot: getDesktopThemeDirectory(),
    createAssetUrl: (themeId, assetPath) =>
      `${APP_SCHEME}://${THEME_HOST}/${encodeURIComponent(themeId)}/${encodeThemeAssetPath(assetPath)}`,
    onWarning: (message) => console.warn(message)
@@ -158,12 +166,10 @@ async function registerApplicationProtocol(
    } catch {
      return new Response("Bad request", { status: 400 });
    }
-
    const target = path.resolve(webRoot, relativePath);
    if (!isContainedPath(webRoot, target)) {
      return new Response("Forbidden", { status: 403 });
    }
-
    try {
      await access(target);
    } catch {
@@ -180,198 +186,99 @@ async function registerApplicationProtocol(
  ]);
 }

-function lockDownWindow(window: BrowserWindow, allowedOrigin: string) {
-  window.webContents.setWindowOpenHandler(() => ({ action: "deny" }));
-  window.webContents.on("will-navigate", (event, targetUrl) => {
-    if (new URL(targetUrl).origin !== allowedOrigin) {
-      event.preventDefault();
+const hasSingleInstanceLock = app.requestSingleInstanceLock();
+let windowStateReadyToQuit = false;
+
+if (!hasSingleInstanceLock) {
+  app.quit();
+} else {
+  app.on("second-instance", (_event, arguments_, workingDirectory) => {
+    const filePath = findMarkdownFileArgument(
+      arguments_,
+      workingDirectory
+    );
+    if (filePath) {
+      dispatchExternalMarkdown(filePath);
+    } else if (!applicationController?.focusMostRecentWindow()) {
+      void applicationController?.createWindow();
    }
  });
-  const applicationSession = window.webContents.session;
-  applicationSession.setPermissionCheckHandler(() => false);
-  applicationSession.setPermissionRequestHandler(
-    (_webContents, _permission, callback) => callback(false)
-  );
-}
-
-async function createApplication(
-  applicationService: ApplicationService
-) {
-  const developmentUrl = getCommandLineValue("web-url");
-  const applicationUrl =
-    developmentUrl ?? `${APP_SCHEME}://${APP_HOST}/index.html`;
-  const renderUrl = new URL(
-    "/preview-frame.html?target=pdf",
-    applicationUrl
-  ).href;
-
-  const window = new BrowserWindow({
-    title: `Markdown PDF 导出器 v${app.getVersion()}`,
-    icon: getApplicationIcon(),
-    width: 1440,
-    height: 960,
-    minWidth: 1024,
-    minHeight: 720,
-    autoHideMenuBar: true,
-    show: false,
-    webPreferences: {
-      contextIsolation: true,
-      nodeIntegration: false,
-      sandbox: true,
-      preload: path.join(currentDirectory, "app-preload.cjs")
+  app.on("open-file", (event, filePath) => {
+    event.preventDefault();
+    if (isMarkdownFilePath(filePath)) {
+      dispatchExternalMarkdown(filePath);
    }
  });
-  lockDownWindow(window, new URL(applicationUrl).origin);
-
-  const pdfGenerator = new ElectronPdfGenerator({
-    renderUrl,
-    preloadPath: path.join(currentDirectory, "pdf-preload.cjs")
-  });
-  const validateSender = (event: IpcMainInvokeEvent) =>
-    event.sender === window.webContents &&
-    event.senderFrame !== null &&
-    new URL(event.senderFrame.url).origin ===
-      new URL(applicationUrl).origin;
-  let documentRoot: string | undefined;
-
-  ipcMain.handle(DESKTOP_OPEN_MARKDOWN, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面文件请求");
+  app.on("activate", () => {
+    if (!applicationController?.focusMostRecentWindow()) {
+      void applicationController?.createWindow();
    }
-    const selection = await dialog.showOpenDialog(window, {
-      title: "打开 Markdown",
-      properties: ["openFile"],
-      filters: [
-        { name: "Markdown 文件", extensions: ["md", "markdown"] },
-        { name: "文本文件", extensions: ["txt"] }
-      ]
+  });
+  app.on("before-quit", (event) => {
+    if (windowStateReadyToQuit || !applicationController) {
+      return;
+    }
+    event.preventDefault();
+    void applicationController.flushWindowState().finally(() => {
+      windowStateReadyToQuit = true;
+      app.quit();
+      setTimeout(() => {
+        windowStateReadyToQuit = false;
+      }, 1_000);
    });
-    const filePath = selection.filePaths[0];
-    if (selection.canceled || !filePath) {
-      return undefined;
-    }
-    const content = await readFile(filePath, "utf8");
-    documentRoot = path.dirname(filePath);
-    return {
-      markdown: content,
-      fileName: path.basename(filePath)
-    };
  });
-  ipcMain.handle(
-    DESKTOP_RENDER_MARKDOWN,
-    async (event, unsafeRequest: unknown) => {
-      if (!validateSender(event)) {
-        throw new Error("拒绝未授权的桌面渲染请求");
-      }
-      return applicationService.render(
-        parseMarkdownRenderRequest(unsafeRequest),
-        documentRoot ? { localRoot: documentRoot } : {}
-      );
-    }
-  );
-  ipcMain.handle(DESKTOP_LIST_THEMES, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面主题请求");
-    }
-    return applicationService.listThemes();
+  app.on("will-quit", () => {
+    void applicationController?.closeResources();
  });
-  ipcMain.handle(
-    DESKTOP_GET_THEME_CSS,
-    async (event, unsafeThemeId: unknown) => {
-      if (!validateSender(event)) {
-        throw new Error("拒绝未授权的桌面主题请求");
-      }
-      const css = await applicationService.getThemeCss(
-        parseThemeId(unsafeThemeId)
-      );
-      if (css === undefined) {
-        throw new Error("未找到指定主题");
-      }
-      return css;
-    }
-  );
-  ipcMain.handle(
-    DESKTOP_GENERATE_PDF,
-    async (event, unsafePayload: unknown) => {
-      if (!validateSender(event)) {
-        throw new Error("拒绝未授权的桌面 PDF 请求");
-      }
-      const payload = parsePagedDocumentPayload(unsafePayload);
-      const result = await pdfGenerator.generate(payload);
-      return {
-        pdf: result.pdf,
-        pageCount: result.pageCount,
-        echartsErrors: result.echartsErrors,
-        mermaidErrors: result.mermaidErrors
-      };
-    }
-  );
-  ipcMain.handle(
-    DESKTOP_SAVE_PDF,
-    async (
-      event,
-      unsafeFileName: unknown,
-      unsafePdf: unknown
-    ) => {
-      if (!validateSender(event)) {
-        throw new Error("拒绝未授权的桌面 PDF 保存请求");
-      }
-      if (
-        typeof unsafeFileName !== "string" ||
-        unsafeFileName.length === 0 ||
-        unsafeFileName.length > 500 ||
-        !(unsafePdf instanceof Uint8Array) ||
-        unsafePdf.byteLength === 0 ||
-        unsafePdf.byteLength > 200 * 1024 * 1024
-      ) {
-        throw new Error("PDF 保存参数无效");
+  app
+    .whenReady()
+    .then(async () => {
+      Menu.setApplicationMenu(null);
+      if (process.platform === "win32") {
+        app.setAppUserModelId("com.md-to-pdf.desktop");
      }
+      const themeDirectory = getDesktopThemeDirectory();
+      await mkdir(themeDirectory, { recursive: true });
+      const applicationService = createDesktopApplicationService();
+      await registerApplicationProtocol(applicationService);

-      const suggestedName = path.basename(unsafeFileName).endsWith(".pdf")
-        ? path.basename(unsafeFileName)
-        : `${path.basename(unsafeFileName)}.pdf`;
-      const selection = await dialog.showSaveDialog(window, {
-        title: "导出 PDF",
-        defaultPath: path.join(app.getPath("documents"), suggestedName),
-        filters: [{ name: "PDF 文件", extensions: ["pdf"] }]
+      const developmentUrl = getCommandLineValue("web-url");
+      const applicationUrl =
+        developmentUrl ?? `${APP_SCHEME}://${APP_HOST}/index.html`;
+      applicationController = new DesktopApplicationController({
+        applicationService,
+        applicationUrl,
+        renderUrl: new URL(
+          "/preview-frame.html?target=pdf",
+          applicationUrl
+        ).href,
+        preloadPath: path.join(
+          currentDirectory,
+          "app-preload.cjs"
+        ),
+        pdfPreloadPath: path.join(
+          currentDirectory,
+          "pdf-preload.cjs"
+        ),
+        iconPath: getApplicationIcon(),
+        themeDirectory,
+        windowStatePath: path.join(
+          app.getPath("userData"),
+          "window-state.json"
+        )
      });
-      if (selection.canceled || !selection.filePath) {
-        return false;
-      }
-      await writeFile(selection.filePath, unsafePdf);
-      return true;
-    }
-  );
+      await applicationController.initialize();

-  window.once("ready-to-show", () => window.show());
-  window.on("closed", () => {
-    ipcMain.removeHandler(DESKTOP_OPEN_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_RENDER_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_LIST_THEMES);
-    ipcMain.removeHandler(DESKTOP_GET_THEME_CSS);
-    ipcMain.removeHandler(DESKTOP_GENERATE_PDF);
-    ipcMain.removeHandler(DESKTOP_SAVE_PDF);
-    void pdfGenerator.close();
-  });
-  await window.loadURL(applicationUrl);
+      const startupMarkdownPath = pendingExternalMarkdownPath;
+      pendingExternalMarkdownPath = undefined;
+      await applicationController.createWindow(startupMarkdownPath);
+    })
+    .catch((error: unknown) => {
+      console.error("桌面应用启动失败", error);
+      app.quit();
+    });
 }

-app
-  .whenReady()
-  .then(async () => {
-    Menu.setApplicationMenu(null);
-    if (process.platform === "win32") {
-      app.setAppUserModelId("com.md-to-pdf.desktop");
-    }
-    const applicationService = createDesktopApplicationService();
-    await registerApplicationProtocol(applicationService);
-    await createApplication(applicationService);
-  })
-  .catch((error: unknown) => {
-    console.error("桌面应用启动失败", error);
-    app.quit();
-  });
-
 app.on("window-all-closed", () => {
  if (process.platform !== "darwin") {
    app.quit();
@@ -0,0 +1,96 @@
+import { createHash } from "node:crypto";
+import { readFile, realpath, stat } from "node:fs/promises";
+import path from "node:path";
+
+const markdownExtensions = new Set([".md", ".markdown"]);
+
+export interface OpenedMarkdownDocument {
+  markdown: string;
+  fileName: string;
+}
+
+export interface MarkdownFileSnapshot {
+  document: OpenedMarkdownDocument;
+  filePath: string;
+  documentKey: string;
+  contentHash: string;
+}
+
+export function createMarkdownContentHash(markdown: string) {
+  return createHash("sha256").update(markdown, "utf8").digest("hex");
+}
+
+export function createMarkdownDocumentKey(filePath: string) {
+  const normalized = path.normalize(filePath);
+  return process.platform === "win32"
+    ? normalized.toLocaleLowerCase("en-US")
+    : normalized;
+}
+
+export function isMarkdownFilePath(filePath: string) {
+  return markdownExtensions.has(path.extname(filePath).toLowerCase());
+}
+
+export function findMarkdownFileArgument(
+  arguments_: string[],
+  workingDirectory: string
+) {
+  for (const argument of arguments_) {
+    if (!argument || argument.startsWith("-")) {
+      continue;
+    }
+    const candidate = path.isAbsolute(argument)
+      ? path.normalize(argument)
+      : path.resolve(workingDirectory, argument);
+    if (isMarkdownFilePath(candidate)) {
+      return candidate;
+    }
+  }
+  return undefined;
+}
+
+export async function readMarkdownDocument(
+  filePath: string,
+  maximumLength: number
+): Promise<OpenedMarkdownDocument> {
+  if (!isMarkdownFilePath(filePath)) {
+    throw new Error("只允许打开 .md 或 .markdown 文件");
+  }
+  if (!Number.isSafeInteger(maximumLength) || maximumLength <= 0) {
+    throw new Error("Markdown 长度限制无效");
+  }
+
+  const fileStats = await stat(filePath);
+  if (!fileStats.isFile()) {
+    throw new Error("Markdown 路径不是文件");
+  }
+  if (fileStats.size > maximumLength * 4) {
+    throw new Error("Markdown 文件过大");
+  }
+
+  const markdown = await readFile(filePath, "utf8");
+  if (markdown.length > maximumLength) {
+    throw new Error("Markdown 文件过大");
+  }
+  return {
+    markdown,
+    fileName: path.basename(filePath)
+  };
+}
+
+export async function readMarkdownFileSnapshot(
+  filePath: string,
+  maximumLength: number
+): Promise<MarkdownFileSnapshot> {
+  const canonicalPath = await realpath(filePath);
+  const document = await readMarkdownDocument(
+    canonicalPath,
+    maximumLength
+  );
+  return {
+    document,
+    filePath: canonicalPath,
+    documentKey: createMarkdownDocumentKey(canonicalPath),
+    contentHash: createMarkdownContentHash(document.markdown)
+  };
+}
@@ -0,0 +1,16 @@
+export interface WindowCloseState {
+  dirty: boolean;
+  allowClose: boolean;
+  closeRequestPending: boolean;
+}
+
+export type WindowCloseDecision = "allow" | "request" | "wait";
+
+export function getWindowCloseDecision(
+  state: WindowCloseState
+): WindowCloseDecision {
+  if (!state.dirty || state.allowClose) {
+    return "allow";
+  }
+  return state.closeRequestPending ? "wait" : "request";
+}
@@ -0,0 +1,200 @@
+import {
+  mkdir,
+  readFile,
+  rename,
+  rm,
+  writeFile
+} from "node:fs/promises";
+import path from "node:path";
+
+export interface WindowBounds {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+}
+
+export interface WindowState {
+  version: 1;
+  bounds: WindowBounds;
+  maximized: boolean;
+}
+
+export interface WindowSize {
+  width: number;
+  height: number;
+}
+
+const WINDOW_STATE_VERSION = 1;
+
+function isFiniteNumber(value: unknown): value is number {
+  return typeof value === "number" && Number.isFinite(value);
+}
+
+function parseWindowBounds(value: unknown): WindowBounds | undefined {
+  if (!value || typeof value !== "object") {
+    return undefined;
+  }
+  const bounds = value as Partial<WindowBounds>;
+  if (
+    !isFiniteNumber(bounds.x) ||
+    !isFiniteNumber(bounds.y) ||
+    !isFiniteNumber(bounds.width) ||
+    !isFiniteNumber(bounds.height) ||
+    bounds.width <= 0 ||
+    bounds.height <= 0
+  ) {
+    return undefined;
+  }
+  return {
+    x: Math.round(bounds.x),
+    y: Math.round(bounds.y),
+    width: Math.round(bounds.width),
+    height: Math.round(bounds.height)
+  };
+}
+
+export function parseWindowState(value: unknown): WindowState | undefined {
+  if (!value || typeof value !== "object") {
+    return undefined;
+  }
+  const state = value as Partial<WindowState>;
+  const bounds = parseWindowBounds(state.bounds);
+  if (
+    state.version !== WINDOW_STATE_VERSION ||
+    !bounds ||
+    typeof state.maximized !== "boolean"
+  ) {
+    return undefined;
+  }
+  return {
+    version: WINDOW_STATE_VERSION,
+    bounds,
+    maximized: state.maximized
+  };
+}
+
+function intersectionArea(left: WindowBounds, right: WindowBounds) {
+  const width = Math.max(
+    0,
+    Math.min(left.x + left.width, right.x + right.width) -
+      Math.max(left.x, right.x)
+  );
+  const height = Math.max(
+    0,
+    Math.min(left.y + left.height, right.y + right.height) -
+      Math.max(left.y, right.y)
+  );
+  return width * height;
+}
+
+function clamp(value: number, minimum: number, maximum: number) {
+  return Math.min(Math.max(value, minimum), maximum);
+}
+
+function centerBounds(size: WindowSize, workArea: WindowBounds): WindowBounds {
+  const width = Math.min(
+    Math.max(1, Math.round(size.width)),
+    workArea.width
+  );
+  const height = Math.min(
+    Math.max(1, Math.round(size.height)),
+    workArea.height
+  );
+  return {
+    x: Math.round(workArea.x + (workArea.width - width) / 2),
+    y: Math.round(workArea.y + (workArea.height - height) / 2),
+    width,
+    height
+  };
+}
+
+export function resolveWindowBounds(
+  savedBounds: WindowBounds | undefined,
+  workAreas: WindowBounds[],
+  primaryWorkArea: WindowBounds,
+  defaultSize: WindowSize,
+  minimumSize: WindowSize
+): WindowBounds {
+  if (!savedBounds) {
+    return centerBounds(defaultSize, primaryWorkArea);
+  }
+
+  let selectedArea = primaryWorkArea;
+  let selectedIntersection = 0;
+  for (const workArea of workAreas) {
+    const area = intersectionArea(savedBounds, workArea);
+    if (area > selectedIntersection) {
+      selectedArea = workArea;
+      selectedIntersection = area;
+    }
+  }
+
+  if (selectedIntersection === 0) {
+    return centerBounds(
+      {
+        width: Math.min(
+          Math.max(savedBounds.width, minimumSize.width),
+          primaryWorkArea.width
+        ),
+        height: Math.min(
+          Math.max(savedBounds.height, minimumSize.height),
+          primaryWorkArea.height
+        )
+      },
+      primaryWorkArea
+    );
+  }
+
+  const width = Math.min(
+    Math.max(savedBounds.width, minimumSize.width),
+    selectedArea.width
+  );
+  const height = Math.min(
+    Math.max(savedBounds.height, minimumSize.height),
+    selectedArea.height
+  );
+  return {
+    x: clamp(
+      savedBounds.x,
+      selectedArea.x,
+      selectedArea.x + selectedArea.width - width
+    ),
+    y: clamp(
+      savedBounds.y,
+      selectedArea.y,
+      selectedArea.y + selectedArea.height - height
+    ),
+    width,
+    height
+  };
+}
+
+export async function loadWindowState(filePath: string) {
+  try {
+    return parseWindowState(
+      JSON.parse(await readFile(filePath, "utf8")) as unknown
+    );
+  } catch {
+    return undefined;
+  }
+}
+
+export async function saveWindowState(
+  filePath: string,
+  state: WindowState
+) {
+  await mkdir(path.dirname(filePath), { recursive: true });
+  const temporaryPath = `${filePath}.${process.pid}.tmp`;
+  try {
+    await writeFile(
+      temporaryPath,
+      `${JSON.stringify(state, null, 2)}\n`,
+      "utf8"
+    );
+    await rename(temporaryPath, filePath);
+  } catch (error) {
+    await rm(temporaryPath, { force: true }).catch(() => undefined);
+    throw error;
+  }
+}
@@ -0,0 +1,88 @@
+import path from "node:path";
+import { pathToFileURL } from "node:url";
+import { describe, expect, it } from "vitest";
+import { resolveDesktopDocumentLinkAction } from "../src/desktop-document-link.js";
+
+describe("桌面文档链接动作", () => {
+  const markdownPath = path.resolve("D:/文档/章节/当前.md");
+
+  it("保留锚点并把网络和自定义协议交给系统", () => {
+    expect(resolveDesktopDocumentLinkAction("#标题")).toEqual({
+      type: "anchor",
+      href: "#标题"
+    });
+    expect(
+      resolveDesktopDocumentLinkAction("//example.com/path")
+    ).toEqual({
+      type: "external",
+      href: "https://example.com/path"
+    });
+    expect(
+      resolveDesktopDocumentLinkAction("mailto:user@example.com")
+    ).toEqual({
+      type: "external",
+      href: "mailto:user@example.com"
+    });
+    expect(
+      resolveDesktopDocumentLinkAction("obsidian://open?vault=docs")
+    ).toEqual({
+      type: "external",
+      href: "obsidian://open?vault=docs"
+    });
+  });
+
+  it("允许相对路径越过 Markdown 目录", () => {
+    expect(
+      resolveDesktopDocumentLinkAction(
+        "../../共享/说明.pdf#page=2",
+        markdownPath
+      )
+    ).toEqual({
+      type: "local",
+      filePath: path.resolve(
+        path.dirname(markdownPath),
+        "../../共享/说明.pdf"
+      )
+    });
+  });
+
+  it("解析绝对路径、file URI 和 URL 编码", () => {
+    const absolutePath = path.resolve("C:/资料/项目说明.md");
+    expect(
+      resolveDesktopDocumentLinkAction(absolutePath, markdownPath)
+    ).toEqual({
+      type: "local",
+      filePath: path.normalize(absolutePath)
+    });
+    expect(
+      resolveDesktopDocumentLinkAction(
+        pathToFileURL(absolutePath).href,
+        markdownPath
+      )
+    ).toEqual({
+      type: "local",
+      filePath: path.normalize(absolutePath)
+    });
+    expect(
+      resolveDesktopDocumentLinkAction(
+        "../%E5%85%B1%E4%BA%AB/%E8%AF%B4%E6%98%8E.pdf",
+        markdownPath
+      )
+    ).toEqual({
+      type: "local",
+      filePath: path.resolve(
+        path.dirname(markdownPath),
+        "../共享/说明.pdf"
+      )
+    });
+  });
+
+  it("拒绝危险链接和无文件基准的相对路径", () => {
+    expect(
+      resolveDesktopDocumentLinkAction("javascript:alert(1)")
+    ).toEqual({ type: "ignore" });
+    expect(() =>
+      resolveDesktopDocumentLinkAction("../说明.pdf")
+    ).toThrow("尚未保存");
+  });
+});
@@ -0,0 +1,107 @@
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+import {
+  createMarkdownContentHash,
+  createMarkdownDocumentKey,
+  findMarkdownFileArgument,
+  isMarkdownFilePath,
+  readMarkdownDocument,
+  readMarkdownFileSnapshot
+} from "../src/markdown-file.js";
+
+describe("桌面 Markdown 文件参数", () => {
+  it("识别两种 Markdown 扩展名且忽略大小写", () => {
+    expect(isMarkdownFilePath("C:\\docs\\周报.md")).toBe(true);
+    expect(isMarkdownFilePath("C:\\docs\\说明.MARKDOWN")).toBe(true);
+    expect(isMarkdownFilePath("C:\\docs\\说明.txt")).toBe(false);
+  });
+
+  it("从启动参数中提取绝对 Markdown 路径", () => {
+    expect(
+      findMarkdownFileArgument(
+        [
+          "C:\\Program Files\\md-to-pdf\\md-to-pdf.exe",
+          "--original-process-start-time=1",
+          "D:\\文档\\项目周报.md"
+        ],
+        "C:\\Windows"
+      )
+    ).toBe(path.normalize("D:\\文档\\项目周报.md"));
+  });
+
+  it("根据第二实例的工作目录解析相对路径", () => {
+    expect(
+      findMarkdownFileArgument(
+        ["md-to-pdf.exe", "docs\\readme.markdown"],
+        "D:\\项目"
+      )
+    ).toBe(path.resolve("D:\\项目", "docs\\readme.markdown"));
+  });
+
+  it("忽略非 Markdown 文件及 Chromium 参数", () => {
+    expect(
+      findMarkdownFileArgument(
+        ["md-to-pdf.exe", "--inspect", "notes.txt"],
+        "C:\\项目"
+      )
+    ).toBeUndefined();
+  });
+
+  it("统一读取 Markdown 并限制解码后的字符数", async () => {
+    const directory = await mkdtemp(
+      path.join(os.tmpdir(), "md-to-pdf-markdown-")
+    );
+    const filePath = path.join(directory, "示例.md");
+    try {
+      await writeFile(filePath, "# 示例", "utf8");
+      await expect(
+        readMarkdownDocument(filePath, 20)
+      ).resolves.toEqual({
+        markdown: "# 示例",
+        fileName: "示例.md"
+      });
+      await expect(
+        readMarkdownDocument(filePath, 2)
+      ).rejects.toThrow("Markdown 文件过大");
+    } finally {
+      await rm(directory, { recursive: true, force: true });
+    }
+  });
+
+  it("拒绝非 Markdown 扩展名", async () => {
+    await expect(
+      readMarkdownDocument("C:\\docs\\说明.txt", 100)
+    ).rejects.toThrow("只允许打开 .md 或 .markdown 文件");
+  });
+
+  it("使用真实路径和内容哈希创建文件快照", async () => {
+    const directory = await mkdtemp(
+      path.join(os.tmpdir(), "md-to-pdf-snapshot-")
+    );
+    const filePath = path.join(directory, "快照.md");
+    try {
+      await writeFile(filePath, "# 第一版", "utf8");
+      const snapshot = await readMarkdownFileSnapshot(filePath, 100);
+
+      expect(snapshot.document).toEqual({
+        markdown: "# 第一版",
+        fileName: "快照.md"
+      });
+      expect(snapshot.filePath).toBe(filePath);
+      expect(snapshot.documentKey).toBe(
+        createMarkdownDocumentKey(filePath)
+      );
+      expect(snapshot.contentHash).toBe(
+        createMarkdownContentHash("# 第一版")
+      );
+
+      await writeFile(filePath, "# 第二版", "utf8");
+      const changed = await readMarkdownFileSnapshot(filePath, 100);
+      expect(changed.contentHash).not.toBe(snapshot.contentHash);
+    } finally {
+      await rm(directory, { recursive: true, force: true });
+    }
+  });
+});
@@ -0,0 +1,79 @@
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+
+interface PackageManifest {
+  scripts?: Record<string, string>;
+}
+
+const desktopRoot = fileURLToPath(new URL("../", import.meta.url));
+const projectRoot = fileURLToPath(new URL("../../../", import.meta.url));
+
+function readManifest(path: string): PackageManifest {
+  return JSON.parse(readFileSync(path, "utf8")) as PackageManifest;
+}
+
+describe("桌面发行构建链", () => {
+  it("打包前按依赖顺序完整重建内嵌 Web", () => {
+    const rootManifest = readManifest(`${projectRoot}/package.json`);
+    const desktopManifest = readManifest(`${desktopRoot}/package.json`);
+    const webBuild = rootManifest.scripts?.["build:web-runtime"] ?? "";
+    const expectedWorkspaces = [
+      "@md-to-pdf/markdown-echarts",
+      "@md-to-pdf/core",
+      "@md-to-pdf/renderer",
+      "@md-to-pdf/application",
+      "@md-to-pdf/preview-engine",
+      "@md-to-pdf/web"
+    ];
+
+    let previousIndex = -1;
+    for (const workspace of expectedWorkspaces) {
+      const workspaceIndex = webBuild.indexOf(workspace);
+      expect(workspaceIndex).toBeGreaterThan(previousIndex);
+      previousIndex = workspaceIndex;
+    }
+
+    expect(desktopManifest.scripts?.["build:embedded-web"]).toBe(
+      "npm --prefix ../.. run build:web-runtime"
+    );
+    expect(desktopManifest.scripts?.package).toMatch(
+      /^npm run build:embedded-web && /
+    );
+    expect(desktopManifest.scripts?.make).toMatch(
+      /^npm run build:embedded-web && /
+    );
+    expect(rootManifest.scripts?.["desktop:package"]).toBe(
+      "npm run package -w @md-to-pdf/desktop"
+    );
+  });
+
+  it("将内置主题示例作为独立资源复制到发行目录", () => {
+    const builderConfig = readFileSync(
+      `${desktopRoot}/electron-builder.config.cjs`,
+      "utf8"
+    );
+
+    expect(builderConfig).toContain('from: "../../samples"');
+    expect(builderConfig).toContain('to: "samples"');
+  });
+
+  it("在 Docker Web 构建前复制样例并保留到运行镜像", () => {
+    const dockerfile = readFileSync(
+      `${projectRoot}/deploy/Dockerfile`,
+      "utf8"
+    );
+    const samplesBuildCopyIndex = dockerfile.indexOf(
+      "COPY samples ./samples"
+    );
+    const webBuildIndex = dockerfile.indexOf(
+      "npm run build -w @md-to-pdf/web"
+    );
+
+    expect(samplesBuildCopyIndex).toBeGreaterThan(-1);
+    expect(webBuildIndex).toBeGreaterThan(samplesBuildCopyIndex);
+    expect(dockerfile).toContain(
+      "COPY --chown=pwuser:pwuser --from=build /app/samples ./samples"
+    );
+  });
+});
@@ -0,0 +1,38 @@
+import { describe, expect, it } from "vitest";
+import { getWindowCloseDecision } from "../src/window-close-policy.js";
+
+describe("桌面窗口关闭策略", () => {
+  it("干净文档或已授权窗口可以直接关闭", () => {
+    expect(
+      getWindowCloseDecision({
+        dirty: false,
+        allowClose: false,
+        closeRequestPending: false
+      })
+    ).toBe("allow");
+    expect(
+      getWindowCloseDecision({
+        dirty: true,
+        allowClose: true,
+        closeRequestPending: false
+      })
+    ).toBe("allow");
+  });
+
+  it("未保存文档只发出一次关闭确认请求", () => {
+    expect(
+      getWindowCloseDecision({
+        dirty: true,
+        allowClose: false,
+        closeRequestPending: false
+      })
+    ).toBe("request");
+    expect(
+      getWindowCloseDecision({
+        dirty: true,
+        allowClose: false,
+        closeRequestPending: true
+      })
+    ).toBe("wait");
+  });
+});
@@ -0,0 +1,165 @@
+import { mkdtemp, readdir, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+import {
+  loadWindowState,
+  parseWindowState,
+  resolveWindowBounds,
+  saveWindowState
+} from "../src/window-state.js";
+
+const primaryWorkArea = {
+  x: 0,
+  y: 0,
+  width: 1920,
+  height: 1040
+};
+const defaultSize = { width: 1440, height: 960 };
+const minimumSize = { width: 1024, height: 720 };
+
+describe("桌面窗口状态", () => {
+  it("校验并规范化持久化状态", () => {
+    expect(
+      parseWindowState({
+        version: 1,
+        bounds: {
+          x: 120.4,
+          y: 80.6,
+          width: 1280.2,
+          height: 800.8
+        },
+        maximized: true
+      })
+    ).toEqual({
+      version: 1,
+      bounds: {
+        x: 120,
+        y: 81,
+        width: 1280,
+        height: 801
+      },
+      maximized: true
+    });
+  });
+
+  it("拒绝损坏或不受支持的状态", () => {
+    expect(parseWindowState(undefined)).toBeUndefined();
+    expect(
+      parseWindowState({
+        version: 2,
+        bounds: primaryWorkArea,
+        maximized: false
+      })
+    ).toBeUndefined();
+    expect(
+      parseWindowState({
+        version: 1,
+        bounds: { x: 0, y: 0, width: -1, height: 720 },
+        maximized: false
+      })
+    ).toBeUndefined();
+  });
+
+  it("首次启动时在主显示器居中", () => {
+    expect(
+      resolveWindowBounds(
+        undefined,
+        [primaryWorkArea],
+        primaryWorkArea,
+        defaultSize,
+        minimumSize
+      )
+    ).toEqual({
+      x: 240,
+      y: 40,
+      width: 1440,
+      height: 960
+    });
+  });
+
+  it("将部分溢出的窗口完整收回原显示器", () => {
+    expect(
+      resolveWindowBounds(
+        { x: 1700, y: 900, width: 1280, height: 800 },
+        [primaryWorkArea],
+        primaryWorkArea,
+        defaultSize,
+        minimumSize
+      )
+    ).toEqual({
+      x: 640,
+      y: 240,
+      width: 1280,
+      height: 800
+    });
+  });
+
+  it("显示器移除后在主显示器居中恢复", () => {
+    expect(
+      resolveWindowBounds(
+        { x: 3000, y: 120, width: 1200, height: 780 },
+        [primaryWorkArea],
+        primaryWorkArea,
+        defaultSize,
+        minimumSize
+      )
+    ).toEqual({
+      x: 360,
+      y: 130,
+      width: 1200,
+      height: 780
+    });
+  });
+
+  it("窗口大于工作区时缩小到可完整展示", () => {
+    const compactWorkArea = {
+      x: 1920,
+      y: 0,
+      width: 1280,
+      height: 680
+    };
+    expect(
+      resolveWindowBounds(
+        { x: 2000, y: -100, width: 1800, height: 1000 },
+        [primaryWorkArea, compactWorkArea],
+        primaryWorkArea,
+        defaultSize,
+        minimumSize
+      )
+    ).toEqual({
+      x: 1920,
+      y: 0,
+      width: 1280,
+      height: 680
+    });
+  });
+
+  it("通过临时文件原子保存并可重新载入", async () => {
+    const directory = await mkdtemp(
+      path.join(os.tmpdir(), "md-to-pdf-window-")
+    );
+    const filePath = path.join(directory, "window-state.json");
+    const state = {
+      version: 1 as const,
+      bounds: { x: 10, y: 20, width: 1200, height: 800 },
+      maximized: false
+    };
+    try {
+      await saveWindowState(filePath, state);
+      await expect(loadWindowState(filePath)).resolves.toEqual(state);
+      const updatedState = {
+        ...state,
+        bounds: { x: 30, y: 40, width: 1280, height: 900 },
+        maximized: true
+      };
+      await saveWindowState(filePath, updatedState);
+      await expect(loadWindowState(filePath)).resolves.toEqual(
+        updatedState
+      );
+      expect(await readdir(directory)).toEqual(["window-state.json"]);
+    } finally {
+      await rm(directory, { recursive: true, force: true });
+    }
+  });
+});
@@ -12,7 +12,7 @@
    <meta name="theme-color" content="#1f2937" />
    <meta
      http-equiv="Content-Security-Policy"
-      content="default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data: mdpdf:; img-src 'self' data: blob: mdpdf:; connect-src 'self' ws://localhost:5173; frame-src 'self' blob:; worker-src 'self' blob:;"
+      content="default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self' data: mdpdf:; img-src 'self' data: blob: mdpdf:; connect-src 'self' ws://localhost:5173; frame-src 'self' blob:; worker-src 'self' blob:; manifest-src 'self';"
    />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta
@@ -12,11 +12,9 @@
  "dependencies": {
    "@md-to-pdf/core": "0.1.0",
    "@md-to-pdf/markdown-echarts": "0.1.0",
-    "@mermaid-js/layout-elk": "0.2.2",
+    "@md-to-pdf/preview-engine": "0.1.0",
    "highlight.js": "^11.11.1",
    "katex": "^0.16.28",
-    "mermaid": "11.16.0",
-    "pagedjs": "^0.4.3",
    "pdfjs-dist": "6.1.200",
    "react": "^19.2.0",
    "react-dom": "^19.2.0"
@@ -0,0 +1,102 @@
+import { useEffect } from "react";
+
+type DocumentActionDialogProps =
+  | {
+      type: "new-location";
+      busy?: false;
+      onCurrentWindow: () => void;
+      onNewWindow: () => void;
+      onCancel: () => void;
+    }
+  | {
+      type: "unsaved";
+      busy: boolean;
+      onSave: () => void;
+      onDiscard: () => void;
+      onCancel: () => void;
+    };
+
+export function DocumentActionDialog(
+  props: DocumentActionDialogProps
+) {
+  useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (event.key === "Escape" && !props.busy) {
+        event.preventDefault();
+        props.onCancel();
+      }
+    };
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, [props]);
+
+  const isNewLocation = props.type === "new-location";
+  return (
+    <div className="document-dialog-layer">
+      <div className="document-dialog-backdrop" />
+      <section
+        className="document-dialog"
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="document-dialog-title"
+        aria-describedby="document-dialog-description"
+      >
+        <span className="panel-kicker">文档操作</span>
+        <h2 id="document-dialog-title">
+          {isNewLocation ? "新建 Markdown" : "保存当前修改？"}
+        </h2>
+        <p id="document-dialog-description">
+          {isNewLocation
+            ? "请选择在当前窗口新建，或者保留当前文档并打开一个新窗口。"
+            : "当前文档包含尚未保存的修改。继续操作前，可以先保存这些内容。"}
+        </p>
+        <div className="document-dialog-actions">
+          <button
+            type="button"
+            disabled={props.busy}
+            onClick={props.onCancel}
+          >
+            取消
+          </button>
+          {isNewLocation ? (
+            <>
+              <button
+                type="button"
+                onClick={props.onNewWindow}
+              >
+                新窗口新建
+              </button>
+              <button
+                type="button"
+                className="is-primary"
+                autoFocus
+                onClick={props.onCurrentWindow}
+              >
+                当前窗口新建
+              </button>
+            </>
+          ) : (
+            <>
+              <button
+                type="button"
+                disabled={props.busy}
+                onClick={props.onDiscard}
+              >
+                不保存
+              </button>
+              <button
+                type="button"
+                className="is-primary"
+                disabled={props.busy}
+                autoFocus
+                onClick={props.onSave}
+              >
+                {props.busy ? "正在保存…" : "保存"}
+              </button>
+            </>
+          )}
+        </div>
+      </section>
+    </div>
+  );
+}
@@ -1,4 +1,5 @@
 import {
+  defaultExportConfig,
  getPaperDimensionsMm,
  lengthToMillimeters,
  paperFormatLabels,
@@ -12,9 +13,11 @@ import {
  type MermaidExportConfig
 } from "@md-to-pdf/core";
 import { useEffect, useState } from "react";
+import type { ThemeSummary } from "./application-backend";

 interface ExportSettingsDrawerProps {
  config: ExportConfig;
+  theme: ThemeSummary | undefined;
  onChange: (config: ExportConfig) => void;
  onClose: () => void;
  onReset: () => void;
@@ -24,6 +27,9 @@ interface LengthInputProps {
  label: string;
  value: string;
  maximum: number;
+  disabled?: boolean;
+  precision?: number;
+  step?: number;
  onChange: (value: string) => void;
 }

@@ -32,6 +38,7 @@ const pageNumberFormatLabels: Record<FooterConfig["format"], string> = {
  "page-total": "1 / 10",
  "chinese-page-total": "第 1 页 / 共 10 页",
  "dash-page": "- 1 -",
+  "official-page": "— 1 —（标准公文）",
  custom: "自定义模板"
 };

@@ -98,6 +105,9 @@ function LengthInput({
  label,
  value,
  maximum,
+  disabled = false,
+  precision = 1,
+  step = 0.1,
  onChange
 }: LengthInputProps) {
  const [draft, setDraft] = useState(
@@ -115,7 +125,8 @@ function LengthInput({
      return;
    }
    const normalized = Math.min(Math.max(number, 0), maximum);
-    const rounded = Math.round(normalized * 10) / 10;
+    const factor = 10 ** precision;
+    const rounded = Math.round(normalized * factor) / factor;
    setDraft(String(rounded));
    onChange(`${rounded}mm`);
  }
@@ -128,8 +139,9 @@ function LengthInput({
          type="number"
          min="0"
          max={maximum}
-          step="0.1"
+          step={step}
          value={draft}
+          disabled={disabled}
          onBlur={commit}
          onChange={(event) => setDraft(event.target.value)}
          onKeyDown={(event) => {
@@ -144,6 +156,57 @@ function LengthInput({
  );
 }

+function PageDecorationFontInput({
+  label,
+  value,
+  disabled,
+  onChange
+}: {
+  label: string;
+  value: string;
+  disabled: boolean;
+  onChange: (value: string) => void;
+}) {
+  const [draft, setDraft] = useState(value);
+
+  useEffect(() => {
+    setDraft(value);
+  }, [value]);
+
+  function commit() {
+    const normalized = draft.trim();
+    if (
+      !normalized ||
+      !/^[\p{L}\p{N}\s,"'-]+$/u.test(normalized)
+    ) {
+      setDraft(value);
+      return;
+    }
+    setDraft(normalized);
+    onChange(normalized);
+  }
+
+  return (
+    <label className="setting-field stacked">
+      <span>{label}</span>
+      <input
+        type="text"
+        maxLength={300}
+        value={draft}
+        disabled={disabled}
+        placeholder='"Segoe UI", "Microsoft YaHei", sans-serif'
+        onBlur={commit}
+        onChange={(event) => setDraft(event.target.value)}
+        onKeyDown={(event) => {
+          if (event.key === "Enter") {
+            event.currentTarget.blur();
+          }
+        }}
+      />
+    </label>
+  );
+}
+
 function MermaidFontInput({
  value,
  onChange
@@ -208,6 +271,7 @@ function updateHeaderSlot(

 export function ExportSettingsDrawer({
  config,
+  theme,
  onChange,
  onClose,
  onReset
@@ -259,6 +323,7 @@ export function ExportSettingsDrawer({
    value: string
  ) {
    updatePaper({
+      marginMode: "custom",
      margins: {
        ...margins,
        [side]: value
@@ -266,9 +331,22 @@ export function ExportSettingsDrawer({
    });
  }

+  function followThemeMargins() {
+    updatePaper({
+      marginMode: "theme",
+      margins: theme?.pageDefaults?.margins ?? {
+        top: "16mm",
+        right: "16mm",
+        bottom: "16mm",
+        left: "16mm"
+      }
+    });
+  }
+
  function updateHeader(header: Partial<HeaderConfig>) {
    onChange({
      ...config,
+      pageDecorationsMode: "custom",
      header: {
        ...config.header,
        ...header
@@ -279,6 +357,7 @@ export function ExportSettingsDrawer({
  function updateFooter(footer: Partial<FooterConfig>) {
    onChange({
      ...config,
+      pageDecorationsMode: "custom",
      footer: {
        ...config.footer,
        ...footer
@@ -286,6 +365,19 @@ export function ExportSettingsDrawer({
    });
  }

+  function followThemePageDecorations() {
+    onChange({
+      ...config,
+      pageDecorationsMode: "theme",
+      header: structuredClone(
+        theme?.pageDefaults?.header ?? defaultExportConfig.header
+      ),
+      footer: structuredClone(
+        theme?.pageDefaults?.footer ?? defaultExportConfig.footer
+      )
+    });
+  }
+
  function updateMermaid(mermaid: Partial<MermaidExportConfig>) {
    onChange({
      ...config,
@@ -374,6 +466,34 @@ export function ExportSettingsDrawer({

          <section className="settings-section">
            <h3>页边距</h3>
+            <fieldset className="segmented-control margin-mode-control">
+              <legend>页边距来源</legend>
+              <label>
+                <input
+                  type="radio"
+                  name="margin-mode"
+                  checked={config.paper.marginMode === "theme"}
+                  onChange={followThemeMargins}
+                />
+                跟随主题
+              </label>
+              <label>
+                <input
+                  type="radio"
+                  name="margin-mode"
+                  checked={config.paper.marginMode === "custom"}
+                  onChange={() => updatePaper({ marginMode: "custom" })}
+                />
+                自定义
+              </label>
+            </fieldset>
+            <p className="setting-hint margin-source-hint">
+              {config.paper.marginMode === "theme"
+                ? theme?.pageDefaults
+                  ? `当前采用“${theme.name}”推荐值`
+                  : "当前主题未设置推荐值，采用全局默认 16mm"
+                : "当前采用自定义值；修改任意页边距会自动进入此模式"}
+            </p>
            <div className="margin-grid">
              <LengthInput
                label="上"
@@ -416,6 +536,15 @@ export function ExportSettingsDrawer({
                onChange={(value) => updateMargin("left", value)}
              />
            </div>
+            {config.paper.marginMode === "custom" ? (
+              <button
+                type="button"
+                className="secondary-action margin-reset-action"
+                onClick={followThemeMargins}
+              >
+                恢复主题推荐值
+              </button>
+            ) : null}
          </section>

          <section className="settings-section">
@@ -485,6 +614,53 @@ export function ExportSettingsDrawer({
            </p>
          </section>

+          <section className="settings-section">
+            <h3>页眉与页码来源</h3>
+            <fieldset className="segmented-control margin-mode-control">
+              <legend>页面装饰来源</legend>
+              <label>
+                <input
+                  type="radio"
+                  name="page-decorations-mode"
+                  checked={config.pageDecorationsMode === "theme"}
+                  onChange={followThemePageDecorations}
+                />
+                跟随主题
+              </label>
+              <label>
+                <input
+                  type="radio"
+                  name="page-decorations-mode"
+                  checked={config.pageDecorationsMode === "custom"}
+                  onChange={() =>
+                    onChange({
+                      ...config,
+                      pageDecorationsMode: "custom"
+                    })
+                  }
+                />
+                自定义
+              </label>
+            </fieldset>
+            <p className="setting-hint margin-source-hint">
+              {config.pageDecorationsMode === "theme"
+                ? theme?.pageDefaults?.header ||
+                  theme?.pageDefaults?.footer
+                  ? `当前采用“${theme.name}”推荐的页眉与页码`
+                  : "当前主题未设置推荐值，采用全局默认配置"
+                : "当前采用自定义配置；修改页眉或页码会自动进入此模式"}
+            </p>
+            {config.pageDecorationsMode === "custom" ? (
+              <button
+                type="button"
+                className="secondary-action margin-reset-action"
+                onClick={followThemePageDecorations}
+              >
+                恢复主题推荐值
+              </button>
+            ) : null}
+          </section>
+
          <section className="settings-section">
            <div className="setting-section-title">
              <h3>页眉</h3>
@@ -502,6 +678,21 @@ export function ExportSettingsDrawer({
            <p className="setting-hint">
              支持 {"${title}"}、{"${author}"} 和 {"${filename}"}。
            </p>
+            <PageDecorationFontInput
+              label="页眉字体"
+              value={config.header.fontFamily}
+              disabled={!config.header.enabled}
+              onChange={(fontFamily) => updateHeader({ fontFamily })}
+            />
+            <LengthInput
+              label="页眉字号"
+              value={config.header.fontSize}
+              maximum={20}
+              disabled={!config.header.enabled}
+              precision={2}
+              step={0.01}
+              onChange={(fontSize) => updateHeader({ fontSize })}
+            />
            {(["left", "center", "right"] as const).map((slot) => {
              const labels = { left: "左侧", center: "中间", right: "右侧" };
              return (
@@ -567,6 +758,21 @@ export function ExportSettingsDrawer({
                <span>{config.footer.enabled ? "开启" : "关闭"}</span>
              </label>
            </div>
+            <PageDecorationFontInput
+              label="页码字体"
+              value={config.footer.fontFamily}
+              disabled={!config.footer.enabled}
+              onChange={(fontFamily) => updateFooter({ fontFamily })}
+            />
+            <LengthInput
+              label="页码字号"
+              value={config.footer.fontSize}
+              maximum={20}
+              disabled={!config.footer.enabled}
+              precision={2}
+              step={0.01}
+              onChange={(fontSize) => updateFooter({ fontSize })}
+            />
            <label className="setting-field">
              <span>样式</span>
              <select
@@ -616,6 +822,7 @@ export function ExportSettingsDrawer({
                <option value="left">左侧</option>
                <option value="center">居中</option>
                <option value="right">右侧</option>
+                <option value="outer">外侧（奇数页右、偶数页左）</option>
              </select>
            </label>
            <label className="setting-field">
@@ -636,6 +843,19 @@ export function ExportSettingsDrawer({
                }
              />
            </label>
+            <label className="switch-control divider-control">
+              <input
+                type="checkbox"
+                checked={config.footer.showOnFirstPage}
+                disabled={!config.footer.enabled}
+                onChange={(event) =>
+                  updateFooter({
+                    showOnFirstPage: event.target.checked
+                  })
+                }
+              />
+              <span>首页显示页码</span>
+            </label>
            <label className="switch-control divider-control">
              <input
                type="checkbox"
@@ -7,6 +7,7 @@ import {
  useState
 } from "react";
 import {
+  AnnotationLayer,
  getDocument,
  GlobalWorkerOptions,
  RenderingCancelledException,
@@ -20,10 +21,15 @@ import {
  getPdfCanvasRenderScale,
  getPdfPageCssDimensions
 } from "./pdf-page-geometry";
+import { createPdfAnnotationLinkService } from "./pdf-annotation-links";
 import { PdfPageRenderQueue } from "./pdf-render-queue";

 GlobalWorkerOptions.workerSrc = pdfWorkerUrl;

+type PdfJsAnnotationLinkService = Parameters<
+  AnnotationLayer["render"]
+>[0]["linkService"];
+
 interface PdfPageDescriptor {
  pageNumber: number;
  width: number;
@@ -33,12 +39,16 @@ interface PdfPageDescriptor {
 export interface PrecisePdfPreviewProps {
  blob: Blob;
  zoomPercent: number;
+  onExternalLink?: (href: string) => void;
+  onNavigateToPage?: (pageNumber: number) => void;
  onPageCount?: (pageCount: number) => void;
 }

 interface PrecisePdfPageProps {
  document: PDFDocumentProxy;
  descriptor: PdfPageDescriptor;
+  onExternalLink: (href: string) => void;
+  onNavigateToPage: (pageNumber: number) => void;
  renderQueue: PdfPageRenderQueue;
  zoomPercent: number;
 }
@@ -92,12 +102,15 @@ function useNearViewport(elementRef: React.RefObject<HTMLElement | null>) {
 function PrecisePdfPage({
  document,
  descriptor,
+  onExternalLink,
+  onNavigateToPage,
  renderQueue,
  zoomPercent
 }: PrecisePdfPageProps) {
  const containerRef = useRef<HTMLDivElement>(null);
  const canvasRef = useRef<HTMLCanvasElement>(null);
  const textLayerRef = useRef<HTMLDivElement>(null);
+  const annotationLayerRef = useRef<HTMLDivElement>(null);
  const [displayWidth, setDisplayWidth] = useState(0);
  const [renderError, setRenderError] = useState("");
  const [renderState, setRenderState] = useState<
@@ -158,11 +171,13 @@ function PrecisePdfPage({
  useEffect(() => {
    const canvas = canvasRef.current;
    const textContainer = textLayerRef.current;
+    const annotationContainer = annotationLayerRef.current;
    if (
      !nearViewport ||
      displayWidth <= 0 ||
      !canvas ||
-      !textContainer
+      !textContainer ||
+      !annotationContainer
    ) {
      return;
    }
@@ -171,6 +186,7 @@ function PrecisePdfPage({
    let page: PDFPageProxy | undefined;
    let renderTask: RenderTask | undefined;
    let textLayer: TextLayer | undefined;
+    let annotationLayer: AnnotationLayer | undefined;

    setRenderError("");
    setRenderState("queued");
@@ -212,6 +228,7 @@ function PrecisePdfPage({
          canvas.style.width = `${displayViewport.width}px`;
          canvas.style.height = `${displayViewport.height}px`;
          textContainer.replaceChildren();
+          annotationContainer.replaceChildren();

          renderTask = page.render({
            canvas,
@@ -229,7 +246,43 @@ function PrecisePdfPage({
            textContentSource: page.streamTextContent(),
            viewport: displayViewport
          });
-          await textLayer.render();
+          const annotations = await page.getAnnotations({
+            intent: "display"
+          });
+          const linkService = createPdfAnnotationLinkService(
+            document,
+            descriptor.pageNumber,
+            {
+              onExternalLink,
+              onNavigateToPage
+            }
+          );
+          annotationLayer = new AnnotationLayer({
+            div: annotationContainer,
+            accessibilityManager: undefined,
+            annotationCanvasMap: undefined,
+            annotationEditorUIManager: undefined,
+            page,
+            viewport: displayViewport,
+            structTreeLayer: undefined,
+            commentManager: undefined,
+            linkService,
+            annotationStorage: document.annotationStorage
+          });
+          await Promise.all([
+            textLayer.render(),
+            annotationLayer.render({
+              viewport: displayViewport,
+              div: annotationContainer,
+              annotations,
+              page,
+              linkService:
+                linkService as unknown as PdfJsAnnotationLinkService,
+              annotationStorage: document.annotationStorage,
+              renderForms: false,
+              enableScripting: false
+            })
+          ]);
        } catch (reason: unknown) {
          if (
            disposed ||
@@ -251,10 +304,12 @@ function PrecisePdfPage({
      cancelQueuedRender();
      renderTask?.cancel();
      textLayer?.cancel();
+      annotationLayer?.destroy();
      page?.cleanup();
      canvas.width = 0;
      canvas.height = 0;
      textContainer.replaceChildren();
+      annotationContainer.replaceChildren();
      setRenderState("idle");
    };
  }, [
@@ -264,6 +319,8 @@ function PrecisePdfPage({
    displayWidth,
    document,
    nearViewport,
+    onExternalLink,
+    onNavigateToPage,
    renderQueue
  ]);

@@ -282,6 +339,10 @@ function PrecisePdfPage({
        aria-hidden="true"
      />
      <div ref={textLayerRef} className="textLayer" />
+      <div
+        ref={annotationLayerRef}
+        className="annotationLayer"
+      />
      {renderState !== "rendered" ? (
        <span className="precise-pdf-page-placeholder">
          {renderState === "rendering"
@@ -299,6 +360,8 @@ function PrecisePdfPage({
 export function PrecisePdfPreview({
  blob,
  zoomPercent,
+  onExternalLink,
+  onNavigateToPage,
  onPageCount
 }: PrecisePdfPreviewProps) {
  const [document, setDocument] = useState<PDFDocumentProxy>();
@@ -308,6 +371,19 @@ export function PrecisePdfPreview({
    () => new PdfPageRenderQueue(1),
    [document]
  );
+  const externalLinkRef = useRef(onExternalLink);
+  const navigateToPageRef = useRef(onNavigateToPage);
+  externalLinkRef.current = onExternalLink;
+  navigateToPageRef.current = onNavigateToPage;
+  const handleExternalLink = useCallback((href: string) => {
+    externalLinkRef.current?.(href);
+  }, []);
+  const handleNavigateToPage = useCallback(
+    (pageNumber: number) => {
+      navigateToPageRef.current?.(pageNumber);
+    },
+    []
+  );

  useEffect(() => () => renderQueue.dispose(), [renderQueue]);

@@ -386,6 +462,8 @@ export function PrecisePdfPreview({
          key={page.pageNumber}
          document={document}
          descriptor={page}
+          onExternalLink={handleExternalLink}
+          onNavigateToPage={handleNavigateToPage}
          renderQueue={renderQueue}
          zoomPercent={zoomPercent}
        />
@@ -1,10 +1,24 @@
-import type { RenderedMarkdownDocument } from "@md-to-pdf/core";
+import type {
+  DocumentProfileName,
+  FooterConfig,
+  HeaderConfig,
+  PageMargins,
+  RenderedMarkdownDocument,
+  ThemeCategory
+} from "@md-to-pdf/core";

 export interface ThemeSummary {
  id: string;
  name: string;
  version: string;
  description: string;
+  category: ThemeCategory;
+  compatibleProfiles: DocumentProfileName[];
+  pageDefaults?: {
+    margins: PageMargins;
+    header?: HeaderConfig;
+    footer?: FooterConfig;
+  };
  bundled: boolean;
  source: "bundled" | "local";
 }
@@ -0,0 +1,41 @@
+const sampleModules = import.meta.glob<string>(
+  "../../../samples/themes/*.md",
+  {
+    eager: true,
+    query: "?raw",
+    import: "default"
+  }
+);
+
+export interface BuiltinThemeSample {
+  themeId: string;
+  fileName: string;
+  markdown: string;
+}
+
+function getFileName(modulePath: string) {
+  return modulePath.split("/").at(-1) ?? "";
+}
+
+export const builtinThemeSamples: BuiltinThemeSample[] = Object.entries(
+  sampleModules
+)
+  .map(([modulePath, markdown]) => {
+    const fileName = getFileName(modulePath);
+    return {
+      themeId: fileName.replace(/\.md$/i, ""),
+      fileName,
+      markdown
+    };
+  })
+  .sort((first, second) =>
+    first.themeId.localeCompare(second.themeId, "en")
+  );
+
+const builtinThemeSampleMap = new Map(
+  builtinThemeSamples.map((sample) => [sample.themeId, sample])
+);
+
+export function getBuiltinThemeSample(themeId: string) {
+  return builtinThemeSampleMap.get(themeId);
+}
@@ -0,0 +1,49 @@
+const tutorialModules = import.meta.glob<string>(
+  "../../../samples/tutorials/*.md",
+  {
+    eager: true,
+    query: "?raw",
+    import: "default"
+  }
+);
+
+export interface BuiltinTutorial {
+  id: string;
+  name: string;
+  fileName: string;
+  themeId: string;
+  markdown: string;
+}
+
+const tutorialDefinitions = [
+  {
+    id: "echarts-tutorial",
+    name: "ECharts 图表教程",
+    themeId: "typora-github"
+  },
+  {
+    id: "formal-document-tutorial",
+    name: "公文主题使用教程",
+    themeId: "typora-github"
+  }
+] as const;
+
+const tutorialMarkdownById = new Map(
+  Object.entries(tutorialModules).map(([modulePath, markdown]) => {
+    const fileName = modulePath.split("/").at(-1) ?? "";
+    return [fileName.replace(/\.md$/i, ""), markdown];
+  })
+);
+
+export const builtinTutorials: BuiltinTutorial[] =
+  tutorialDefinitions.map((definition) => {
+    const markdown = tutorialMarkdownById.get(definition.id);
+    if (!markdown) {
+      throw new Error(`缺少内置教程：${definition.id}.md`);
+    }
+    return {
+      ...definition,
+      fileName: `${definition.id}.md`,
+      markdown
+    };
+  });
@@ -0,0 +1,110 @@
+const fallbackBaseName = "未命名文档";
+const windowsReservedName =
+  /^(?:con|prn|aux|nul|com[1-9]|lpt[1-9])$/iu;
+
+function stripMarkdownFormatting(value: string) {
+  return value
+    .replace(/!\[([^\]]*)\]\([^)]*\)/gu, "$1")
+    .replace(/\[([^\]]+)\]\([^)]*\)/gu, "$1")
+    .replace(/<\/?[A-Za-z][^>]*>/gu, " ")
+    .replace(/[`*_~]/gu, "")
+    .replace(/^\s{0,3}(?:>\s*|[-+*]\s+|\d+[.)]\s+)/u, "")
+    .trim();
+}
+
+export function legalizeMarkdownBaseName(value: string) {
+  const normalized = stripMarkdownFormatting(value)
+    .normalize("NFKC")
+    .replace(/[^\p{L}\p{N}\s_-]+/gu, " ")
+    .replace(/\s+/gu, " ")
+    .trim()
+    .replace(/[ .]+$/u, "");
+  const shortened = Array.from(normalized).slice(0, 100).join("").trim();
+  if (!shortened) {
+    return fallbackBaseName;
+  }
+  return windowsReservedName.test(shortened)
+    ? `文档 ${shortened}`
+    : shortened;
+}
+
+export function deriveMarkdownBaseName(markdown: string) {
+  const lines = markdown.replace(/^\uFEFF/u, "").split(/\r?\n/u);
+  let inFrontMatter = lines[0]?.trim() === "---";
+  let inFence = false;
+  let fenceMarker = "";
+  let fenceLength = 0;
+  let firstBodyLine = "";
+
+  for (let index = inFrontMatter ? 1 : 0; index < lines.length; index += 1) {
+    const line = lines[index] ?? "";
+    const trimmed = line.trim();
+    if (inFrontMatter) {
+      if (trimmed === "---" || trimmed === "...") {
+        inFrontMatter = false;
+      }
+      continue;
+    }
+
+    if (inFence) {
+      const closingFence = trimmed.match(/^(`+|~+)\s*$/u)?.[1];
+      if (
+        closingFence?.[0] === fenceMarker &&
+        closingFence.length >= fenceLength
+      ) {
+        inFence = false;
+        fenceMarker = "";
+        fenceLength = 0;
+      }
+      continue;
+    }
+
+    const fence = trimmed.match(/^(`{3,}|~{3,})/u)?.[1];
+    if (fence) {
+      if (!inFence) {
+        inFence = true;
+        fenceMarker = fence[0] ?? "";
+        fenceLength = fence.length;
+      }
+      continue;
+    }
+    if (inFence || !trimmed) {
+      continue;
+    }
+
+    const heading = line.match(/^\s{0,3}#\s+(.+?)\s*#*\s*$/u)?.[1];
+    if (heading) {
+      return legalizeMarkdownBaseName(heading);
+    }
+    if (!firstBodyLine) {
+      firstBodyLine = line;
+    }
+  }
+
+  return legalizeMarkdownBaseName(firstBodyLine);
+}
+
+export function createMarkdownFileName(markdown: string) {
+  return `${deriveMarkdownBaseName(markdown)}.md`;
+}
+
+export function ensureMarkdownFileName(fileName: string, markdown: string) {
+  const trimmed = fileName.trim();
+  if (!trimmed) {
+    return createMarkdownFileName(markdown);
+  }
+  return /\.(?:md|markdown)$/iu.test(trimmed)
+    ? trimmed
+    : `${trimmed}.md`;
+}
+
+export function downloadMarkdown(markdown: string, fileName: string) {
+  const url = URL.createObjectURL(
+    new Blob([markdown], { type: "text/markdown;charset=utf-8" })
+  );
+  const anchor = document.createElement("a");
+  anchor.href = url;
+  anchor.download = fileName;
+  anchor.click();
+  window.setTimeout(() => URL.revokeObjectURL(url), 0);
+}
@@ -0,0 +1,39 @@
+import { classifyDocumentLink } from "@md-to-pdf/core";
+
+export type WebDocumentLinkAction =
+  | {
+      type: "anchor";
+      href: string;
+    }
+  | {
+      type: "open";
+      href: string;
+    }
+  | {
+      type: "ignore";
+    };
+
+export function resolveWebDocumentLinkAction(
+  href: string
+): WebDocumentLinkAction {
+  const link = classifyDocumentLink(href);
+  if (link.kind === "anchor") {
+    return {
+      type: "anchor",
+      href: link.normalizedHref
+    };
+  }
+
+  if (
+    link.kind === "network" ||
+    (link.kind === "protocol" &&
+      (link.scheme === "mailto" || link.scheme === "tel"))
+  ) {
+    return {
+      type: "open",
+      href: link.normalizedHref
+    };
+  }
+
+  return { type: "ignore" };
+}
@@ -0,0 +1,45 @@
+export type DocumentShortcut =
+  | "new"
+  | "save"
+  | "save-as"
+  | "close";
+
+export interface DocumentShortcutEvent {
+  key: string;
+  ctrlKey: boolean;
+  metaKey: boolean;
+  altKey: boolean;
+  shiftKey: boolean;
+  isComposing: boolean;
+  repeat: boolean;
+}
+
+export function getDocumentShortcut(
+  event: DocumentShortcutEvent,
+  desktop: boolean
+): DocumentShortcut | undefined {
+  if (
+    event.isComposing ||
+    event.repeat ||
+    event.altKey ||
+    (!event.ctrlKey && !event.metaKey)
+  ) {
+    return undefined;
+  }
+
+  const key = event.key.toLowerCase();
+  if (event.shiftKey) {
+    return desktop && key === "s" ? "save-as" : undefined;
+  }
+
+  switch (key) {
+    case "s":
+      return "save";
+    case "n":
+      return desktop ? "new" : undefined;
+    case "w":
+      return desktop ? "close" : undefined;
+    default:
+      return undefined;
+  }
+}
@@ -4,8 +4,10 @@ import {
  type ExportConfig
 } from "@md-to-pdf/core";

-export const EXPORT_CONFIG_STORAGE_KEY = "md-to-pdf.export-config.v3";
-export const LEGACY_EXPORT_CONFIG_STORAGE_KEY =
+export const EXPORT_CONFIG_STORAGE_KEY = "md-to-pdf.export-config.v4";
+export const LEGACY_EXPORT_CONFIG_V3_STORAGE_KEY =
+  "md-to-pdf.export-config.v3";
+export const LEGACY_EXPORT_CONFIG_V2_STORAGE_KEY =
  "md-to-pdf.export-config.v2";

 type SettingsStorage = Pick<Storage, "getItem" | "setItem">;
@@ -14,6 +16,119 @@ function cloneDefaultExportConfig() {
  return structuredClone(defaultExportConfig);
 }

+function pickLegacyPageDecorations(value: unknown) {
+  if (typeof value !== "object" || value === null) {
+    return value;
+  }
+  const source = value as Record<string, unknown>;
+  if ("left" in source) {
+    return {
+      enabled: source.enabled,
+      height: source.height,
+      showDivider: source.showDivider,
+      fontSize: source.fontSize,
+      color: source.color,
+      left: source.left,
+      center: source.center,
+      right: source.right
+    };
+  }
+  return {
+    enabled: source.enabled,
+    height: source.height,
+    showDivider: source.showDivider,
+    fontSize: source.fontSize,
+    color: source.color,
+    alignment: source.alignment,
+    format: source.format,
+    template: source.template,
+    startFrom: source.startFrom
+  };
+}
+
+function usesLegacyPageDecorationDefaults(
+  header: unknown,
+  footer: unknown
+) {
+  return (
+    JSON.stringify(pickLegacyPageDecorations(header)) ===
+      JSON.stringify(
+        pickLegacyPageDecorations(defaultExportConfig.header)
+      ) &&
+    JSON.stringify(pickLegacyPageDecorations(footer)) ===
+      JSON.stringify(
+        pickLegacyPageDecorations(defaultExportConfig.footer)
+      )
+  );
+}
+
+function migrateStoredExportConfig(value: unknown): unknown {
+  if (
+    typeof value !== "object" ||
+    value === null ||
+    !("version" in value) ||
+    !("paper" in value)
+  ) {
+    return value;
+  }
+
+  if (
+    value.version !== 2 &&
+    value.version !== 3 &&
+    value.version !== defaultExportConfig.version
+  ) {
+    return value;
+  }
+
+  const source = value as Record<string, unknown>;
+  const hasPageDecorationsMode =
+    typeof source.pageDecorationsMode === "string";
+
+  const paper =
+    typeof value.paper === "object" && value.paper !== null
+      ? value.paper
+      : {};
+  const margins =
+    "margins" in paper &&
+    typeof paper.margins === "object" &&
+    paper.margins !== null
+      ? paper.margins
+      : {};
+  const usesLegacyDefaults =
+    JSON.stringify(margins) ===
+    JSON.stringify(defaultExportConfig.paper.margins);
+  const hasMarginMode =
+    typeof (paper as Record<string, unknown>).marginMode === "string";
+
+  return {
+    ...value,
+    ...(value.version === 2 || value.version === 3
+      ? { version: defaultExportConfig.version }
+      : {}),
+    ...(value.version === 2
+      ? { mermaid: structuredClone(defaultExportConfig.mermaid) }
+      : {}),
+    ...(!hasPageDecorationsMode
+      ? {
+          pageDecorationsMode: usesLegacyPageDecorationDefaults(
+            source.header,
+            source.footer
+          )
+            ? "theme"
+            : "custom"
+        }
+      : {}),
+    paper: {
+      ...paper,
+      ...(!hasMarginMode
+        ? {
+            marginMode: usesLegacyDefaults ? "theme" : "custom"
+          }
+        : {})
+    }
+  };
+}
+
 export function parseStoredExportConfig(rawValue: string | null): ExportConfig {
  if (!rawValue) {
    return cloneDefaultExportConfig();
@@ -21,17 +136,7 @@ export function parseStoredExportConfig(rawValue: string | null): ExportConfig {

  try {
    const value: unknown = JSON.parse(rawValue);
-    const migratedValue =
-      typeof value === "object" &&
-      value !== null &&
-      "version" in value &&
-      value.version === 2
-        ? {
-            ...value,
-            version: defaultExportConfig.version,
-            mermaid: structuredClone(defaultExportConfig.mermaid)
-          }
-        : value;
+    const migratedValue = migrateStoredExportConfig(value);
    const parsed = exportConfigSchema.safeParse(migratedValue);
    return parsed.success ? parsed.data : cloneDefaultExportConfig();
  } catch {
@@ -47,7 +152,9 @@ export function loadExportConfig(
    return parseStoredExportConfig(currentValue);
  }

-  const legacyValue = storage.getItem(LEGACY_EXPORT_CONFIG_STORAGE_KEY);
+  const legacyValue =
+    storage.getItem(LEGACY_EXPORT_CONFIG_V3_STORAGE_KEY) ??
+    storage.getItem(LEGACY_EXPORT_CONFIG_V2_STORAGE_KEY);
  const config = parseStoredExportConfig(legacyValue);
  if (legacyValue) {
    storage.setItem(EXPORT_CONFIG_STORAGE_KEY, JSON.stringify(config));
@@ -1,454 +0,0 @@
-import highlightCss from "highlight.js/styles/github.css?inline";
-import katexCss from "katex/dist/katex.min.css?inline";
-import echartsCss from "@md-to-pdf/markdown-echarts/styles.css?inline";
-import type {
-  PagedDocumentRenderResult,
-  PagedDocumentTimings
-} from "@md-to-pdf/core";
-import { Previewer } from "pagedjs";
-import { fitOversizedEChartsToPage } from "./echarts-page-fit";
-import { fitDocumentImagesToPage } from "./document-image-fit";
-import { createMermaidSiteConfig } from "./mermaid-config";
-import {
-  fitOversizedMermaidToPage,
-  getPageContentDimensions
-} from "./mermaid-page-fit";
-import { renderMermaidDefinitions } from "./mermaid-renderer";
-import { replaceMermaidSvgWithImages } from "./mermaid-static-image";
-import type { MermaidOutputMode } from "./mermaid-static-image";
-import { enablePrintMediaForPreview } from "./preview-styles";
-import "./paged-table-handler";
-import {
-  buildPagedMediaCss,
-  documentBaseCss,
-  documentGeometryCss,
-  formatPageNumber,
-  type PagedPreviewPayload
-} from "./paged-preview";
-import type { PagedRenderTarget } from "./paged-render-target";
-
-export type {
-  PagedDocumentRenderResult,
-  PagedDocumentTimings
-} from "@md-to-pdf/core";
-
-export interface PagedDocumentRenderOptions {
-  target: PagedRenderTarget;
-  shouldContinue?: () => boolean;
-  mermaidOutput?: MermaidOutputMode;
-}
-
-function waitForImages(container: ParentNode) {
-  const images = Array.from(container.querySelectorAll("img"));
-  return Promise.all(
-    images.map(async (image) => {
-      if (image.complete) {
-        return;
-      }
-
-      try {
-        await image.decode();
-      } catch {
-        await new Promise<void>((resolve) => {
-          image.addEventListener("load", () => resolve(), { once: true });
-          image.addEventListener("error", () => resolve(), { once: true });
-        });
-      }
-    })
-  );
-}
-
-function stylesheet(
-  documentRef: Document,
-  css: string,
-  name: string
-) {
-  return {
-    [`${documentRef.location.href}#${name}`]: css
-  };
-}
-
-function mountMeasurementContainer(
-  documentRef: Document,
-  content: DocumentFragment,
-  payload: PagedPreviewPayload,
-  target: PagedRenderTarget
-) {
-  const pageContent = getPageContentDimensions(payload.exportConfig);
-  const style = documentRef.createElement("style");
-  const themeCss =
-    target === "preview"
-      ? enablePrintMediaForPreview(payload.themeCss)
-      : payload.themeCss;
-  style.dataset.pagedMeasurementStyle = "true";
-  style.textContent = [
-    documentBaseCss,
-    highlightCss,
-    katexCss,
-    echartsCss,
-    themeCss,
-    documentGeometryCss
-  ].join("\n");
-
-  const host = documentRef.createElement("div");
-  host.dataset.pagedMeasurementHost = "true";
-  host.style.cssText = [
-    "position: fixed",
-    "left: -100000px",
-    "top: 0",
-    `width: ${pageContent.width}px`,
-    "height: auto",
-    "opacity: 0",
-    "pointer-events: none",
-    "contain: layout style paint"
-  ].join(";");
-
-  documentRef.head.append(style);
-  host.append(content);
-  documentRef.body.append(host);
-
-  return {
-    host,
-    restore() {
-      content.append(...Array.from(host.childNodes));
-      host.remove();
-      style.remove();
-    }
-  };
-}
-
-function applyPageNumbers(
-  container: ParentNode,
-  payload: PagedPreviewPayload,
-  totalPages: number
-) {
-  if (!payload.exportConfig.footer.enabled) {
-    return;
-  }
-
-  const alignment = payload.exportConfig.footer.alignment;
-  const pages = Array.from(
-    container.querySelectorAll<HTMLElement>(".pagedjs_page")
-  );
-
-  for (const [pageIndex, page] of pages.entries()) {
-    const content = page.querySelector<HTMLElement>(
-      `.pagedjs_margin-bottom-${alignment} .pagedjs_margin-content`
-    );
-    if (!content) {
-      continue;
-    }
-
-    content.textContent = formatPageNumber(
-      payload.exportConfig.footer,
-      pageIndex,
-      totalPages
-    );
-    content.setAttribute("data-page-number-rendered", "true");
-  }
-}
-
-function removeTrailingPdfPageBreak(container: ParentNode) {
-  const pages = Array.from(
-    container.querySelectorAll<HTMLElement>(".pagedjs_page")
-  );
-  pages
-    .at(-1)
-    ?.style.setProperty("break-after", "auto", "important");
-}
-
-export class PagedDocumentRuntime {
-  private activePreviewer: Previewer | undefined;
-  private mermaidRenderSequence = 0;
-  private mermaidPromise:
-    | Promise<(typeof import("mermaid"))["default"]>
-    | undefined;
-  private echartsPromise:
-    | Promise<
-        typeof import("@md-to-pdf/markdown-echarts/browser")
-      >
-    | undefined;
-
-  constructor(private readonly root: HTMLElement) {}
-
-  destroy() {
-    if (!this.activePreviewer) {
-      return;
-    }
-
-    this.activePreviewer.chunker.destroy();
-    this.activePreviewer.polisher.destroy();
-    this.activePreviewer = undefined;
-  }
-
-  private loadMermaid() {
-    if (!this.mermaidPromise) {
-      this.mermaidPromise = Promise.all([
-        import("mermaid"),
-        import("@mermaid-js/layout-elk")
-      ]).then(
-        ([{ default: mermaid }, { default: elkLayouts }]) => {
-          mermaid.registerLayoutLoaders(elkLayouts);
-          return mermaid;
-        }
-      );
-    }
-
-    return this.mermaidPromise;
-  }
-
-  private loadECharts() {
-    if (!this.echartsPromise) {
-      this.echartsPromise = import(
-        "@md-to-pdf/markdown-echarts/browser"
-      );
-    }
-    return this.echartsPromise;
-  }
-
-  private async renderECharts(
-    container: ParentNode,
-    payload: PagedPreviewPayload
-  ) {
-    if (!payload.features.includes("echarts")) {
-      return [];
-    }
-
-    const { renderEChartsBlocks } = await this.loadECharts();
-    const outcomes = await renderEChartsBlocks(container, {
-      outputMode: "inline-svg",
-      concurrency: 2,
-      timeoutMs: 5_000
-    });
-
-    return outcomes.flatMap((outcome, index) =>
-      outcome.success
-        ? []
-        : [
-            `图表 ${index + 1}：${
-              outcome.error?.message ?? "未知错误"
-            }`
-          ]
-    );
-  }
-
-  private async renderMermaid(
-    container: DocumentFragment,
-    payload: PagedPreviewPayload
-  ) {
-    if (!payload.features.includes("mermaid")) {
-      return [];
-    }
-
-    const nodes = Array.from(
-      container.querySelectorAll<HTMLElement>(
-        ".mermaid[data-mermaid-pending]"
-      )
-    );
-    if (nodes.length === 0) {
-      return [];
-    }
-
-    const mermaid = await this.loadMermaid();
-    mermaid.initialize(
-      createMermaidSiteConfig(payload.exportConfig.mermaid)
-    );
-    const outcomes = await renderMermaidDefinitions(
-      nodes.map((node) => node.textContent ?? ""),
-      async (definition) => {
-        this.mermaidRenderSequence += 1;
-        return mermaid.render(
-          `mermaid-paged-document-${this.mermaidRenderSequence}`,
-          definition
-        );
-      }
-    );
-    const errors: string[] = [];
-
-    for (const [index, outcome] of outcomes.entries()) {
-      const node = nodes[index];
-      if (!node) {
-        continue;
-      }
-
-      node.removeAttribute("data-mermaid-pending");
-      if (outcome.success) {
-        node.innerHTML = outcome.svg;
-        outcome.bindFunctions?.(node);
-        continue;
-      }
-
-      const message =
-        outcome.error instanceof Error
-          ? outcome.error.message
-          : "未知错误";
-      node.classList.add("mermaid-error");
-      node.textContent =
-        `Mermaid 图表 ${index + 1} 渲染失败：${message}`;
-      errors.push(`图表 ${index + 1}：${message}`);
-    }
-
-    return errors;
-  }
-
-  async render(
-    payload: PagedPreviewPayload,
-    options: PagedDocumentRenderOptions
-  ): Promise<PagedDocumentRenderResult | undefined> {
-    const totalStartedAt = performance.now();
-    const shouldContinue = options.shouldContinue ?? (() => true);
-    if (!shouldContinue()) {
-      return undefined;
-    }
-
-    const setupStartedAt = performance.now();
-    const documentRef = this.root.ownerDocument;
-    this.destroy();
-    this.root.replaceChildren();
-    documentRef.documentElement.dataset.renderTarget = options.target;
-    documentRef.documentElement.lang =
-      payload.metadata.language || "zh-CN";
-    documentRef.title =
-      payload.metadata.title || "Markdown 分页文档";
-
-    const template = documentRef.createElement("template");
-    template.innerHTML = payload.articleHtml;
-    const content = template.content;
-    const setupMs = performance.now() - setupStartedAt;
-
-    const mermaidStartedAt = performance.now();
-    const mermaidErrors = await this.renderMermaid(content, payload);
-    const mermaidMs = performance.now() - mermaidStartedAt;
-
-    let echartsErrors: string[] = [];
-    let echartsMs = 0;
-    let echartsFitMs = 0;
-    let mermaidFitMs = 0;
-    let mermaidConversionMs = 0;
-    if (
-      payload.features.includes("echarts") ||
-      content.querySelector(".mermaid svg") ||
-      content.querySelector("img.md-document-image")
-    ) {
-      const measurement = mountMeasurementContainer(
-        documentRef,
-        content,
-        payload,
-        options.target
-      );
-      try {
-        await documentRef.fonts.ready;
-
-        const echartsStartedAt = performance.now();
-        echartsErrors = await this.renderECharts(
-          measurement.host,
-          payload
-        );
-        echartsMs = performance.now() - echartsStartedAt;
-        await waitForImages(measurement.host);
-        fitDocumentImagesToPage(
-          measurement.host,
-          payload.exportConfig
-        );
-
-        const echartsFitStartedAt = performance.now();
-        fitOversizedEChartsToPage(
-          measurement.host,
-          payload.exportConfig
-        );
-        echartsFitMs =
-          performance.now() - echartsFitStartedAt;
-
-        const mermaidFitStartedAt = performance.now();
-        fitOversizedMermaidToPage(
-          measurement.host,
-          payload.exportConfig
-        );
-        mermaidFitMs = performance.now() - mermaidFitStartedAt;
-
-        const mermaidConversionStartedAt = performance.now();
-        if (options.mermaidOutput === "svg-image") {
-          replaceMermaidSvgWithImages(measurement.host);
-          await waitForImages(measurement.host);
-        }
-        mermaidConversionMs =
-          performance.now() - mermaidConversionStartedAt;
-      } finally {
-        measurement.restore();
-      }
-    }
-
-    if (!shouldContinue()) {
-      return undefined;
-    }
-
-    const resourceWaitStartedAt = performance.now();
-    await documentRef.fonts.ready;
-    await waitForImages(content);
-    const resourceWaitMs = performance.now() - resourceWaitStartedAt;
-
-    const paginationStartedAt = performance.now();
-    const previewer = new Previewer();
-    this.activePreviewer = previewer;
-    const flow = await previewer.preview(
-      content,
-      [
-        stylesheet(documentRef, documentBaseCss, "document-base"),
-        stylesheet(documentRef, highlightCss, "highlight"),
-        stylesheet(documentRef, katexCss, "katex"),
-        stylesheet(documentRef, echartsCss, "echarts"),
-        stylesheet(documentRef, payload.themeCss, "theme"),
-        stylesheet(
-          documentRef,
-          documentGeometryCss,
-          "document-geometry"
-        ),
-        stylesheet(
-          documentRef,
-          buildPagedMediaCss(payload.exportConfig, payload),
-          "paged-media"
-        )
-      ],
-      this.root
-    );
-    const paginationMs = performance.now() - paginationStartedAt;
-
-    if (!shouldContinue()) {
-      return undefined;
-    }
-
-    const finalizeStartedAt = performance.now();
-    applyPageNumbers(this.root, payload, flow.total);
-    if (options.target === "pdf") {
-      removeTrailingPdfPageBreak(this.root);
-    }
-    const finalizeMs = performance.now() - finalizeStartedAt;
-
-    return {
-      pageCount: flow.total,
-      echartsErrors,
-      mermaidErrors,
-      timings: {
-        setupMs,
-        echartsMs,
-        echartsFitMs,
-        mermaidMs,
-        mermaidFitMs,
-        mermaidConversionMs,
-        resourceWaitMs,
-        paginationMs,
-        finalizeMs,
-        totalMs: performance.now() - totalStartedAt
-      }
-    };
-  }
-}
-
-declare global {
-  interface Window {
-    __mdToPdfRender?: (
-      payload: PagedPreviewPayload,
-      target?: PagedRenderTarget
-    ) => Promise<PagedDocumentRenderResult>;
-  }
-}
@@ -1,12 +1,15 @@
-import { PagedDocumentRuntime } from "./paged-document-runtime";
+import echartsCss from "@md-to-pdf/markdown-echarts/styles.css?inline";
 import {
  isPagedPreviewRenderRequest,
  PAGED_PREVIEW_MESSAGE_SCOPE,
+  PagedDocumentRuntime,
+  resolveMermaidOutputMode,
+  resolvePagedRenderTarget,
  type PagedPreviewFrameMessage,
  type PagedPreviewPayload
-} from "./paged-preview";
-import { resolvePagedRenderTarget } from "./paged-render-target";
-import { resolveMermaidOutputMode } from "./mermaid-static-image";
+} from "@md-to-pdf/preview-engine";
+import highlightCss from "highlight.js/styles/github.css?inline";
+import katexCss from "katex/dist/katex.min.css?inline";
 import {
  beginPreviewFrameRender,
  completePreviewFrameRender
@@ -23,7 +26,11 @@ function getPreviewRoot() {
 const previewRoot = getPreviewRoot();
 const renderTarget = resolvePagedRenderTarget(window.location.search);
 const mermaidOutput = resolveMermaidOutputMode(window.location.search);
-const runtime = new PagedDocumentRuntime(previewRoot);
+const runtime = new PagedDocumentRuntime(previewRoot, {
+  highlightCss,
+  katexCss,
+  echartsCss
+});
 document.documentElement.dataset.renderTarget = renderTarget;

 let latestRequestId = 0;
@@ -33,9 +40,47 @@ function post(message: PagedPreviewFrameMessage) {
  window.parent.postMessage(message, window.location.origin);
 }

+function measurePreviewContentHeight() {
+  const rootRect = previewRoot.getBoundingClientRect();
+  const documentRect =
+    document.documentElement.getBoundingClientRect();
+  return Math.ceil(
+    Math.max(
+      document.documentElement.scrollHeight,
+      document.body.scrollHeight,
+      previewRoot.scrollHeight,
+      rootRect.bottom - documentRect.top
+    )
+  );
+}
+
+document.addEventListener(
+  "click",
+  (event) => {
+    const target =
+      event.target instanceof Element
+        ? event.target.closest<HTMLAnchorElement>("a[href]")
+        : undefined;
+    const href = target?.getAttribute("href")?.trim();
+    if (!href) {
+      return;
+    }
+
+    event.preventDefault();
+    event.stopPropagation();
+    post({
+      scope: PAGED_PREVIEW_MESSAGE_SCOPE,
+      type: "link",
+      href
+    });
+  },
+  { capture: true }
+);
+
 async function renderPagedPreview(
  requestId: number,
-  payload: PagedPreviewPayload
+  payload: PagedPreviewPayload,
+  layout: "paged" | "continuous"
 ) {
  if (requestId !== latestRequestId) {
    return;
@@ -45,15 +90,21 @@ async function renderPagedPreview(
  post({
    scope: PAGED_PREVIEW_MESSAGE_SCOPE,
    type: "rendering",
-    requestId
+    requestId,
+    layout
  });

  try {
-    const result = await runtime.render(payload, {
-      target: renderTarget,
-      mermaidOutput,
-      shouldContinue: () => requestId === latestRequestId
-    });
+    const result =
+      layout === "continuous"
+        ? await runtime.renderContinuous(payload, {
+            shouldContinue: () => requestId === latestRequestId
+          })
+        : await runtime.render(payload, {
+            target: renderTarget,
+            mermaidOutput,
+            shouldContinue: () => requestId === latestRequestId
+          });
    if (!result) {
      return;
    }
@@ -62,7 +113,8 @@ async function renderPagedPreview(
      scope: PAGED_PREVIEW_MESSAGE_SCOPE,
      type: "rendered",
      requestId,
-      contentHeight: Math.ceil(document.documentElement.scrollHeight),
+      layout,
+      contentHeight: measurePreviewContentHeight(),
      ...result
    });
  } finally {
@@ -121,12 +173,12 @@ window.addEventListener("message", (event: MessageEvent<unknown>) => {
  }

  latestRequestId = Math.max(latestRequestId, event.data.requestId);
-  const { requestId, payload } = event.data;
+  const { requestId, layout, payload } = event.data;
  renderQueue = renderQueue
    .catch(() => undefined)
    .then(async () => {
      try {
-        await renderPagedPreview(requestId, payload);
+        await renderPagedPreview(requestId, payload, layout);
      } catch (reason: unknown) {
        if (requestId !== latestRequestId) {
          return;
@@ -1,41 +0,0 @@
-declare module "pagedjs" {
-  export interface PagedFlow {
-    total: number;
-    pages: HTMLElement[];
-    performance: number;
-    size: {
-      width: { value: number; unit: string };
-      height: { value: number; unit: string };
-      format?: string;
-      orientation?: string;
-    };
-  }
-
-  export type PagedStylesheet = string | Record<string, string>;
-
-  export class Previewer {
-    chunker: {
-      destroy(): void;
-    };
-    polisher: {
-      destroy(): void;
-    };
-    preview(
-      content?: HTMLElement | DocumentFragment | string,
-      stylesheets?: PagedStylesheet[],
-      renderTo?: HTMLElement | string
-    ): Promise<PagedFlow>;
-  }
-
-  export class Handler {
-    constructor(
-      chunker: unknown,
-      polisher: unknown,
-      caller: unknown
-    );
-  }
-
-  export function registerHandlers(
-    ...handlers: Array<typeof Handler>
-  ): void;
-}
@@ -0,0 +1,152 @@
+import type { PDFDocumentProxy } from "pdfjs-dist";
+import { decodeLocalDocumentLinkFromPdf } from "@md-to-pdf/core";
+
+export type PdfDestination = string | unknown[];
+
+export interface PdfAnnotationLinkCallbacks {
+  onExternalLink: (href: string) => void;
+  onNavigateToPage: (pageNumber: number) => void;
+}
+
+export interface PdfAnnotationLinkService {
+  externalLinkEnabled: boolean;
+  addLinkAttributes(
+    link: HTMLAnchorElement,
+    url: string,
+    newWindow?: boolean
+  ): void;
+  getDestinationHash(destination: PdfDestination): string;
+  getAnchorUrl(anchor: string): string;
+  goToDestination(destination: PdfDestination): Promise<void>;
+  executeNamedAction(action: string): void;
+  executeSetOCGState(action: object): Promise<void>;
+  getAttachmentContent(id: string): Promise<undefined>;
+}
+
+export async function resolvePdfDestinationPage(
+  document: Pick<
+    PDFDocumentProxy,
+    "getDestination" | "getPageIndex" | "numPages"
+  >,
+  destination: PdfDestination
+) {
+  const explicitDestination =
+    typeof destination === "string"
+      ? await document.getDestination(destination)
+      : destination;
+  if (
+    !Array.isArray(explicitDestination) ||
+    explicitDestination.length === 0
+  ) {
+    return undefined;
+  }
+
+  const pageReference = explicitDestination[0];
+  let pageNumber: number;
+  if (
+    typeof pageReference === "number" &&
+    Number.isInteger(pageReference)
+  ) {
+    pageNumber = pageReference + 1;
+  } else if (
+    pageReference &&
+    typeof pageReference === "object"
+  ) {
+    pageNumber =
+      (await document.getPageIndex(
+        pageReference as Parameters<
+          PDFDocumentProxy["getPageIndex"]
+        >[0]
+      )) + 1;
+  } else {
+    return undefined;
+  }
+
+  return pageNumber >= 1 && pageNumber <= document.numPages
+    ? pageNumber
+    : undefined;
+}
+
+export function resolvePdfNamedActionPage(
+  action: string,
+  currentPage: number,
+  pageCount: number
+) {
+  switch (action) {
+    case "FirstPage":
+      return 1;
+    case "LastPage":
+      return pageCount;
+    case "NextPage":
+    case "PageDown":
+      return Math.min(pageCount, currentPage + 1);
+    case "PrevPage":
+    case "PageUp":
+      return Math.max(1, currentPage - 1);
+    default:
+      return undefined;
+  }
+}
+
+export function createPdfAnnotationLinkService(
+  document: Pick<
+    PDFDocumentProxy,
+    "getDestination" | "getPageIndex" | "numPages"
+  >,
+  currentPage: number,
+  callbacks: PdfAnnotationLinkCallbacks
+): PdfAnnotationLinkService {
+  return {
+    externalLinkEnabled: true,
+    addLinkAttributes(link, url) {
+      const resolvedUrl =
+        decodeLocalDocumentLinkFromPdf(url) ?? url;
+      link.href = "#";
+      link.rel = "noopener noreferrer";
+      link.title ||= resolvedUrl;
+      link.dataset.pdfExternalHref = resolvedUrl;
+      link.onclick = (event) => {
+        event.preventDefault();
+        event.stopPropagation();
+        callbacks.onExternalLink(resolvedUrl);
+        return false;
+      };
+    },
+    getDestinationHash() {
+      return "#pdf-destination";
+    },
+    getAnchorUrl() {
+      return "#pdf-action";
+    },
+    async goToDestination(destination) {
+      try {
+        const pageNumber = await resolvePdfDestinationPage(
+          document,
+          destination
+        );
+        if (pageNumber !== undefined) {
+          callbacks.onNavigateToPage(pageNumber);
+        }
+      } catch {
+        // 损坏或无法解析的 PDF 目标保持无行为。
+      }
+    },
+    executeNamedAction(action) {
+      const pageNumber = resolvePdfNamedActionPage(
+        action,
+        currentPage,
+        document.numPages
+      );
+      if (pageNumber !== undefined) {
+        callbacks.onNavigateToPage(pageNumber);
+      }
+    },
+    async executeSetOCGState() {
+      // 精确预览不改变 PDF 可选内容组状态。
+    },
+    async getAttachmentContent() {
+      // 精确预览不下载或执行 PDF 内嵌附件。
+      return undefined;
+    }
+  };
+}
@@ -0,0 +1,194 @@
+const wideImageBase64 =
+  "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";
+const portraitImageBase64 =
+  "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";
+const boundaryImageBase64 =
+  "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";
+
+export const sampleMarkdown = `---
+title: Markdown PDF 媒体分页示例
+author: 内网文档团队
+keywords:
+  - Markdown
+  - PDF
+  - 媒体分页
+---
+
+# Markdown PDF 媒体分页示例
+
+这份文档集中展示常用排版、不同尺寸图片、Mermaid 与 ECharts 的渲染和分页效果。
+
+## 基础排版
+
+- [x] Markdown 实时预览
+- [x] 图片、Mermaid 与 ECharts
+- [x] 快速预览和精确 PDF 预览
+- [ ] 根据实际文档继续扩展主题
+
+| 能力 | 示例用途 |
+| --- | --- |
+| 表格与任务列表 | 验证主题基础样式 |
+| 数学公式 | 验证字体和基线 |
+| 媒体块 | 验证限宽、缩放与分页 |
+
+行内公式：$E = mc^2$。
+
+> 预览与 PDF 共用相同的渲染结果、主题 CSS 和分页结构。
+
+## 网络图片
+
+下面只保留一张网络图片，用于验证远程资源获取与离线失败提示。
+
+![NASA 地球网络图片](https://images-assets.nasa.gov/image/PIA18033/PIA18033~medium.jpg)
+
+## Base64 图片块
+
+### 横向图片：限宽基准
+
+1600 × 900 的横图会先按正文宽度等比例收缩，收缩后的高度才是分页算法使用的基准高度。
+
+![Base64 横向图片 1600×900][base64-wide]
+
+### 边界图片：上一页空白回填
+
+这一段用于形成稳定的分页边界。分页算法会保留标题、图注和间距的原始尺寸，只计算图片主体还能使用的高度。如果主体只需轻微缩小，并且缩放率仍在允许范围内，就尝试回填到上一页空白区域。
+
+为了覆盖长文档场景，这里继续补充少量正文，使媒体块靠近默认 A4 页面底部。媒体元素必须按照源文档顺序串行处理，前一个媒体完成重排以后，后一个媒体才基于新的版面重新计算。
+
+![Base64 边界图片 1200×880][base64-boundary]
+
+### 纵向图片：单页高度适配
+
+900 × 1800 的纵图在限宽后仍可能超过单页内容区，此时应继续等比例缩小并完整放在一页内。
+
+![Base64 纵向图片 900×1800][base64-portrait]
+
+## Mermaid 尺寸示例
+
+### 横向流程图：限宽
+
+\`\`\`mermaid
+flowchart LR
+  A["Markdown"] --> B["统一 HTML"]
+  B --> C["主题 CSS"]
+  C --> D["网页预览"]
+  C --> E["PDF 导出"]
+\`\`\`
+
+### 纵向流程图：高度和分页
+
+\`\`\`mermaid
+flowchart TB
+  A["读取文档"] --> B["解析 Front Matter"]
+  B --> C["渲染 Markdown"]
+  C --> D["渲染 Mermaid"]
+  D --> E["渲染 ECharts"]
+  E --> F["等待图片与字体"]
+  F --> G["首次分页"]
+  G --> H["串行检查媒体块"]
+  H --> I["必要时重新分页"]
+  I --> J["生成 PDF"]
+\`\`\`
+
+## ECharts 尺寸示例
+
+### 紧凑图表：40mm
+
+\`\`\`echarts
+caption: 紧凑柱状图（40mm）
+height: 40mm
+option:
+  xAxis:
+    type: category
+    data: [研发, 产品, 设计, 运营]
+  yAxis:
+    type: value
+  series:
+    - type: bar
+      data: [28, 18, 15, 22]
+\`\`\`
+
+### 标准图表：58mm
+
+\`\`\`echarts
+caption: 产品能力树（58mm）
+height: 58mm
+option:
+  series:
+    - type: tree
+      orient: LR
+      label:
+        position: left
+      data:
+        - name: 文档平台
+          children:
+            - name: Markdown
+              children:
+                - name: Mermaid
+                - name: ECharts
+            - name: PDF
+              children:
+                - name: 快速预览
+                - name: 精确预览
+\`\`\`
+
+大型图表的 caption 保持原尺寸，仅缩放图表主体。
+
+### 大型图表：85mm
+
+\`\`\`echarts
+caption: 模块工作量占比（85mm）
+height: 85mm
+option:
+  series:
+    - type: treemap
+      roam: false
+      nodeClick: false
+      breadcrumb:
+        show: false
+      label:
+        show: true
+        formatter: "{b}"
+      data:
+        - name: 渲染
+          children:
+            - { name: Markdown, value: 32 }
+            - { name: ECharts, value: 24 }
+            - { name: Mermaid, value: 18 }
+        - name: 导出
+          children:
+            - { name: PDF, value: 28 }
+            - { name: 主题, value: 12 }
+\`\`\`
+
+## 串行媒体块
+
+下面连续放置图片、Mermaid 和 ECharts，用于观察长文档中多个媒体元素是否始终按源文档顺序计算。
+
+![Base64 串行边界图片][base64-boundary]
+
+\`\`\`mermaid
+flowchart LR
+  A["图片完成"] --> B["Mermaid 计算"]
+  B --> C["ECharts 计算"]
+\`\`\`
+
+\`\`\`echarts
+caption: 串行媒体收尾图（58mm）
+height: 58mm
+option:
+  series:
+    - type: pie
+      radius: [35%, 70%]
+      data:
+        - { name: 图片, value: 36 }
+        - { name: Mermaid, value: 28 }
+        - { name: ECharts, value: 36 }
+\`\`\`
+
+> 所有媒体仅在额外缩放不超过阈值时回填；否则保持完整媒体块并移动到下一页。
+
+[base64-wide]: data:image/png;base64,${wideImageBase64}
+[base64-portrait]: data:image/png;base64,${portraitImageBase64}
+[base64-boundary]: data:image/png;base64,${boundaryImageBase64}
+`;
@@ -24,8 +24,7 @@ textarea {
  font: inherit;
 }

-button,
-.file-button {
+button {
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid #b8c2bd;
@@ -102,13 +101,31 @@ button:disabled {
  border-left: 1px solid #d4dad7;
 }

-.document-summary > strong {
+.document-name-row {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  min-width: 0;
+}
+
+.document-name-row > strong {
  overflow: hidden;
  font-size: 0.82rem;
  text-overflow: ellipsis;
  white-space: nowrap;
 }

+.unsaved-badge {
+  flex: none;
+  padding: 1px 6px;
+  border: 1px solid #d9bd86;
+  border-radius: 999px;
+  background: #fff7e7;
+  color: #8a5a13;
+  font-size: 0.62rem;
+  font-weight: 800;
+}
+
 .document-summary .render-status {
  max-width: 100%;
  margin-top: 3px;
@@ -138,17 +155,103 @@ h1 {
  gap: 10px;
 }

-.file-button {
-  display: inline-flex;
-  align-items: center;
+.more-menu {
+  position: relative;
 }

-.file-button input {
+.more-menu-popover {
  position: absolute;
-  width: 1px;
+  z-index: 30;
+  top: calc(100% + 8px);
+  right: 0;
+  display: flex;
+  min-width: 220px;
+  padding: 6px;
+  border: 1px solid #c8d1cc;
+  border-radius: 10px;
+  background: #fff;
+  box-shadow: 0 12px 30px rgb(38 58 50 / 18%);
+  flex-direction: column;
+}
+
+.more-menu-popover button {
+  width: 100%;
+  min-height: 36px;
+  padding: 0 11px;
+  border: 0;
+  background: transparent;
+  text-align: left;
+}
+
+.more-menu-popover button:hover,
+.more-menu-popover button:focus-visible {
+  background: #edf3f0;
+}
+
+.more-menu-popover .menu-command {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 24px;
+}
+
+.menu-command kbd {
+  color: #78857e;
+  font-family: inherit;
+  font-size: 0.68rem;
+  font-weight: 600;
+}
+
+.more-menu-submenu-item {
+  position: relative;
+}
+
+.menu-separator {
  height: 1px;
-  overflow: hidden;
-  clip: rect(0 0 0 0);
+  margin: 5px 7px;
+  background: #e0e6e3;
+}
+
+.submenu-trigger {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 24px;
+}
+
+.more-menu-submenu {
+  position: absolute;
+  z-index: 31;
+  top: -7px;
+  right: calc(100% + 8px);
+  width: 250px;
+  max-height: min(70vh, 560px);
+  padding: 6px;
+  overflow-y: auto;
+  border: 1px solid #c8d1cc;
+  border-radius: 10px;
+  background: #fff;
+  box-shadow: 0 12px 30px rgb(38 58 50 / 18%);
+}
+
+.sample-menu-group {
+  display: flex;
+  flex-direction: column;
+  margin: 0;
+}
+
+.sample-menu-group + .sample-menu-group {
+  margin-top: 5px;
+  padding-top: 5px;
+  border-top: 1px solid #e3e8e5;
+}
+
+.sample-menu-group-label {
+  padding: 6px 11px 3px;
+  color: #718078;
+  font-size: 0.68rem;
+  font-weight: 800;
+  letter-spacing: 0.06em;
 }

 .editor-layout {
@@ -546,7 +649,8 @@ textarea:focus {
 }

 .precise-pdf-page canvas,
-.precise-pdf-page .textLayer {
+.precise-pdf-page .textLayer,
+.precise-pdf-page .annotationLayer {
  position: absolute;
  inset: 0;
 }
@@ -580,6 +684,45 @@ textarea:focus {
  --min-font-size-inv: calc(1 / var(--min-font-size));
 }

+.precise-pdf-page .annotationLayer {
+  z-index: 2;
+  overflow: hidden;
+  color-scheme: only light;
+  pointer-events: none;
+  transform-origin: 0 0;
+}
+
+.precise-pdf-page .annotationLayer section {
+  position: absolute;
+  box-sizing: border-box;
+  text-align: initial;
+  pointer-events: auto;
+  user-select: none;
+  transform-origin: 0 0;
+}
+
+.precise-pdf-page
+  .annotationLayer
+  .linkAnnotation
+  > a {
+  position: absolute;
+  inset: 0;
+  cursor: pointer;
+  outline: none;
+}
+
+.precise-pdf-page
+  .annotationLayer
+  .linkAnnotation
+  > a:hover,
+.precise-pdf-page
+  .annotationLayer
+  .linkAnnotation
+  > a:focus-visible {
+  background: rgb(31 111 83 / 14%);
+  outline: 1px solid rgb(31 111 83 / 45%);
+}
+
 .precise-pdf-page .textLayer :is(span, br) {
  position: absolute;
  color: transparent;
@@ -672,6 +815,59 @@ textarea:focus {
  inset: 0;
 }

+.document-dialog-layer {
+  position: fixed;
+  z-index: 50;
+  display: grid;
+  place-items: center;
+  padding: 24px;
+  inset: 0;
+}
+
+.document-dialog-backdrop {
+  position: absolute;
+  background: rgb(24 35 30 / 46%);
+  inset: 0;
+}
+
+.document-dialog {
+  position: relative;
+  width: min(480px, 100%);
+  padding: 24px;
+  border: 1px solid #c9d2cd;
+  border-radius: 14px;
+  background: #fff;
+  box-shadow: 0 24px 70px rgb(20 34 28 / 28%);
+}
+
+.document-dialog h2 {
+  margin: 4px 0 10px;
+  color: #25332d;
+  font-family: Georgia, "Songti SC", serif;
+  font-size: 1.45rem;
+  font-weight: 500;
+}
+
+.document-dialog p {
+  margin: 0;
+  color: #5d6a64;
+  font-size: 0.88rem;
+  line-height: 1.65;
+}
+
+.document-dialog-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 10px;
+  margin-top: 24px;
+}
+
+.document-dialog-actions .is-primary {
+  border-color: #326b54;
+  background: #326b54;
+  color: #fff;
+}
+
 .settings-backdrop {
  position: absolute;
  width: 100%;
@@ -850,6 +1046,19 @@ textarea:focus {
  gap: 8px 18px;
 }

+.margin-mode-control {
+  margin-bottom: 8px;
+}
+
+.margin-source-hint {
+  margin: 0 0 10px;
+}
+
+.margin-reset-action {
+  width: 100%;
+  margin-top: 10px;
+}
+
 .margin-grid .setting-field {
  align-items: flex-start;
  flex-direction: column;
@@ -1056,4 +1265,31 @@ textarea:focus {
  .settings-drawer {
    width: 100vw;
  }
+
+  .more-menu-popover {
+    max-height: min(72vh, 620px);
+    overflow-y: auto;
+  }
+
+  .more-menu-submenu {
+    position: static;
+    width: auto;
+    max-height: 48vh;
+    margin: 4px 0 0 8px;
+    box-shadow: none;
+  }
+
+  .document-dialog-layer {
+    align-items: end;
+    padding: 12px;
+  }
+
+  .document-dialog {
+    padding: 20px;
+  }
+
+  .document-dialog-actions {
+    align-items: stretch;
+    flex-direction: column-reverse;
+  }
 }
@@ -0,0 +1,34 @@
+import type { ThemeCategory } from "@md-to-pdf/core";
+import type { ThemeSummary } from "./application-backend";
+
+const themeCategoryOrder: readonly ThemeCategory[] = [
+  "general",
+  "red-letter",
+  "formal",
+  "tender"
+];
+
+const themeCategoryLabels: Record<ThemeCategory, string> = {
+  general: "通用主题",
+  "red-letter": "政企红头",
+  formal: "政企正式",
+  tender: "标书正式"
+};
+
+export interface ThemeGroup {
+  category: ThemeCategory;
+  label: string;
+  themes: ThemeSummary[];
+}
+
+export function groupThemesByCategory(
+  themes: readonly ThemeSummary[]
+): ThemeGroup[] {
+  return themeCategoryOrder
+    .map((category) => ({
+      category,
+      label: themeCategoryLabels[category],
+      themes: themes.filter((theme) => theme.category === category)
+    }))
+    .filter((group) => group.themes.length > 0);
+}
@@ -0,0 +1,92 @@
+import {
+  defaultExportConfig,
+  resolvePageMargins,
+  type ExportConfig
+} from "@md-to-pdf/core";
+import type { ThemeSummary } from "./application-backend";
+
+function marginsEqual(
+  first: ExportConfig["paper"]["margins"],
+  second: ExportConfig["paper"]["margins"]
+) {
+  return (
+    first.top === second.top &&
+    first.right === second.right &&
+    first.bottom === second.bottom &&
+    first.left === second.left
+  );
+}
+
+function applyThemePageDecorations(
+  config: ExportConfig,
+  theme?: ThemeSummary
+): ExportConfig {
+  if (config.pageDecorationsMode !== "theme") {
+    return config;
+  }
+
+  const header =
+    theme?.pageDefaults?.header ?? defaultExportConfig.header;
+  const footer =
+    theme?.pageDefaults?.footer ?? defaultExportConfig.footer;
+  if (
+    JSON.stringify(config.header) === JSON.stringify(header) &&
+    JSON.stringify(config.footer) === JSON.stringify(footer)
+  ) {
+    return config;
+  }
+
+  return {
+    ...config,
+    header: structuredClone(header),
+    footer: structuredClone(footer)
+  };
+}
+
+export function applyThemeMargins(
+  config: ExportConfig,
+  theme?: ThemeSummary
+): ExportConfig {
+  if (config.paper.marginMode !== "theme") {
+    return config;
+  }
+
+  const margins = resolvePageMargins(
+    config.paper,
+    theme?.pageDefaults?.margins
+  );
+  if (marginsEqual(config.paper.margins, margins)) {
+    return config;
+  }
+
+  return {
+    ...config,
+    paper: {
+      ...config.paper,
+      margins
+    }
+  };
+}
+
+export function applyThemeDefaults(
+  config: ExportConfig,
+  theme?: ThemeSummary
+): ExportConfig {
+  return applyThemePageDecorations(
+    applyThemeMargins(config, theme),
+    theme
+  );
+}
+
+export function selectTheme(
+  config: ExportConfig,
+  theme: ThemeSummary
+): ExportConfig {
+  return applyThemeDefaults(
+    {
+      ...config,
+      themeId: theme.id
+    },
+    theme
+  );
+}
@@ -9,7 +9,11 @@ export type { ThemeSummary } from "./application-backend";

 export function useThemeResources(
  themeId: string,
-  onThemesLoaded: (themes: ThemeSummary[]) => void
+  onThemesLoaded: (
+    themes: ThemeSummary[],
+    refreshKey: number
+  ) => void,
+  refreshKey = 0
 ) {
  const [themes, setThemes] = useState<ThemeSummary[]>([]);
  const [themeCss, setThemeCss] = useState("");
@@ -23,7 +27,7 @@ export function useThemeResources(
      .then(({ themes: availableThemes }) => {
        setThemes(availableThemes);
        setCatalogError("");
-        onThemesLoaded(availableThemes);
+        onThemesLoaded(availableThemes, refreshKey);
      })
      .catch((reason: unknown) => {
        if (!controller.signal.aborted) {
@@ -34,7 +38,7 @@ export function useThemeResources(
      });

    return () => controller.abort();
-  }, [onThemesLoaded]);
+  }, [onThemesLoaded, refreshKey]);

  useEffect(() => {
    const controller = new AbortController();
@@ -52,7 +56,7 @@ export function useThemeResources(
      });

    return () => controller.abort();
-  }, [themeId]);
+  }, [refreshKey, themeId]);

  return {
    error: catalogError || cssError,
@@ -3,7 +3,9 @@
 import type {
  PagedDocumentPayload,
  PagedDocumentRenderResult,
-  RenderedMarkdownDocument
+  RenderedMarkdownDocument,
+  ThemeCategory,
+  DocumentProfileName
 } from "@md-to-pdf/core";

 declare global {
@@ -24,6 +26,33 @@ declare global {
        }
      | undefined
    >;
+    consumePendingMarkdown(): Promise<
+      | {
+          markdown: string;
+          fileName: string;
+        }
+      | undefined
+    >;
+    discardPendingMarkdown(): Promise<void>;
+    onMarkdownOpened(
+      listener: (reason: "open" | "reload" | "replace") => void
+    ): () => void;
+    startNewMarkdown(): Promise<void>;
+    createNewWindow(): Promise<void>;
+    resolveWindowClose(close: boolean): Promise<void>;
+    onWindowCloseRequested(listener: () => void): () => void;
+    setDocumentDirty(dirty: boolean): Promise<void>;
+    openDocumentLink(href: string): Promise<void>;
+    saveMarkdown(
+      fileName: string,
+      markdown: string
+    ): Promise<{ fileName: string } | undefined>;
+    saveMarkdownAs(
+      fileName: string,
+      markdown: string
+    ): Promise<{ fileName: string } | undefined>;
+    openThemeDirectory(): Promise<string>;
+    refreshThemes(): Promise<void>;
    renderMarkdown(input: {
      markdown: string;
      language: string;
@@ -38,6 +67,8 @@ declare global {
        name: string;
        version: string;
        description: string;
+        category: ThemeCategory;
+        compatibleProfiles: DocumentProfileName[];
        bundled: boolean;
        source: "bundled" | "local";
      }>;
@@ -1,12 +1,23 @@
+import { readFileSync } from "node:fs";
+import { fileURLToPath } from "node:url";
 import { describe, expect, it } from "vitest";
 import {
  APP_VERSION,
  APP_VERSION_LABEL
 } from "../src/app-version";

+const webRoot = fileURLToPath(new URL("../", import.meta.url));
+
 describe("应用版本", () => {
  it("从统一构建版本生成标题徽标", () => {
-    expect(APP_VERSION).toBe("0.4.3");
-    expect(APP_VERSION_LABEL).toBe("v0.4.3");
+    expect(APP_VERSION).toBe("0.5.1");
+    expect(APP_VERSION_LABEL).toBe("v0.5.1");
+  });
+
+  it("允许浏览器加载同源 Web Manifest", () => {
+    const indexHtml = readFileSync(`${webRoot}/index.html`, "utf8");
+
+    expect(indexHtml).toContain('rel="manifest"');
+    expect(indexHtml).toContain("manifest-src 'self'");
  });
 });
@@ -0,0 +1,44 @@
+import { describe, expect, it } from "vitest";
+import {
+  builtinThemeSamples,
+  getBuiltinThemeSample
+} from "../src/builtin-theme-samples";
+
+const expectedThemeIds = [
+  "enterprise-red-simple",
+  "formal-feasibility",
+  "formal-regulation",
+  "formal-report",
+  "gov-red-letter",
+  "gov-red-standard",
+  "red-briefing",
+  "tender-blind",
+  "tender-business-blue",
+  "tender-classic",
+  "typora-github",
+  "typora-like",
+  "typora-pixyll",
+  "typora-whitey"
+];
+
+describe("内置主题示例", () => {
+  it("为全部内置主题注册同名 Markdown 文件", () => {
+    expect(
+      builtinThemeSamples.map((sample) => sample.themeId).sort()
+    ).toEqual(expectedThemeIds);
+    expect(
+      builtinThemeSamples.every(
+        (sample) => sample.fileName === `${sample.themeId}.md`
+      )
+    ).toBe(true);
+  });
+
+  it("提供可直接编辑的非空 Markdown 内容", () => {
+    for (const sample of builtinThemeSamples) {
+      expect(sample.markdown.startsWith("---")).toBe(true);
+      expect(sample.markdown.length).toBeGreaterThan(300);
+      expect(getBuiltinThemeSample(sample.themeId)).toBe(sample);
+    }
+    expect(getBuiltinThemeSample("unknown-theme")).toBeUndefined();
+  });
+});
@@ -0,0 +1,39 @@
+import { describe, expect, it } from "vitest";
+import { builtinTutorials } from "../src/builtin-tutorials";
+
+describe("内置教程", () => {
+  it("注册 ECharts 与公文主题教程", () => {
+    expect(
+      builtinTutorials.map(({ id, name, themeId, fileName }) => ({
+        id,
+        name,
+        themeId,
+        fileName
+      }))
+    ).toEqual([
+      {
+        id: "echarts-tutorial",
+        name: "ECharts 图表教程",
+        themeId: "typora-github",
+        fileName: "echarts-tutorial.md"
+      },
+      {
+        id: "formal-document-tutorial",
+        name: "公文主题使用教程",
+        themeId: "typora-github",
+        fileName: "formal-document-tutorial.md"
+      }
+    ]);
+  });
+
+  it("教程内容完整且能够直接作为 Markdown 打开", () => {
+    for (const tutorial of builtinTutorials) {
+      expect(tutorial.markdown.startsWith("---")).toBe(true);
+      expect(tutorial.markdown.length).toBeGreaterThan(1_000);
+    }
+    expect(builtinTutorials[0].markdown).toContain("```echarts");
+    expect(builtinTutorials[1].markdown).toContain(
+      "document.profile: official"
+    );
+  });
+});
@@ -0,0 +1,62 @@
+import { describe, expect, it } from "vitest";
+import {
+  createMarkdownFileName,
+  deriveMarkdownBaseName,
+  ensureMarkdownFileName,
+  legalizeMarkdownBaseName
+} from "../src/document-file";
+
+describe("Markdown 默认文件名", () => {
+  it("优先使用 Front Matter 与代码围栏之外的一级标题", () => {
+    expect(
+      deriveMarkdownBaseName(`---
+title: 元数据标题
+---
+第一行正文
+
+\`\`\`markdown
+# 围栏标题
+\`\`\`
+
+# 2026 年研发周报：第 31 周`)
+    ).toBe("2026 年研发周报 第 31 周");
+  });
+
+  it("没有一级标题时使用第一行非空正文", () => {
+    expect(
+      createMarkdownFileName(
+        "\n\n> **本周完成** [API 重构](https://example.com)\n后续内容"
+      )
+    ).toBe("本周完成 API 重构.md");
+  });
+
+  it("四字符围栏不会被较短的同类围栏提前关闭", () => {
+    expect(
+      deriveMarkdownBaseName(`\`\`\`\`markdown
+# 围栏内标题
+\`\`\`
+# 仍在围栏内
+\`\`\`\`
+# 正文标题`)
+    ).toBe("正文标题");
+  });
+
+  it("清理非法字符并规避 Windows 保留名称", () => {
+    expect(legalizeMarkdownBaseName('季度总结：<测试> / "版本"')).toBe(
+      "季度总结 测试 版本"
+    );
+    expect(legalizeMarkdownBaseName("CON")).toBe("文档 CON");
+  });
+
+  it("空文档使用回退文件名并限制名称长度", () => {
+    expect(createMarkdownFileName(" \n")).toBe("未命名文档.md");
+    expect(legalizeMarkdownBaseName("文".repeat(150))).toHaveLength(100);
+  });
+
+  it("保留已有 Markdown 扩展名", () => {
+    expect(ensureMarkdownFileName("报告.markdown", "# 报告")).toBe(
+      "报告.markdown"
+    );
+    expect(ensureMarkdownFileName("报告", "# 报告")).toBe("报告.md");
+  });
+});
@@ -0,0 +1,44 @@
+import { describe, expect, it } from "vitest";
+import { resolveWebDocumentLinkAction } from "../src/document-link";
+
+describe("Web 文档链接行为", () => {
+  it("保留文档锚点", () => {
+    expect(resolveWebDocumentLinkAction("#section")).toEqual({
+      type: "anchor",
+      href: "#section"
+    });
+  });
+
+  it("在外部窗口打开 HTTP 链接和浏览器协议", () => {
+    expect(
+      resolveWebDocumentLinkAction("//example.com/path")
+    ).toEqual({
+      type: "open",
+      href: "https://example.com/path"
+    });
+    expect(
+      resolveWebDocumentLinkAction("mailto:a@example.com")
+    ).toEqual({
+      type: "open",
+      href: "mailto:a@example.com"
+    });
+    expect(resolveWebDocumentLinkAction("tel:+8612345")).toEqual({
+      type: "open",
+      href: "tel:+8612345"
+    });
+  });
+
+  it("忽略本地、未知和危险地址", () => {
+    for (const href of [
+      "../docs/a.md",
+      "C:/docs/a.md",
+      "file:///C:/docs/a.md",
+      "obsidian://open?vault=x",
+      "javascript:alert(1)"
+    ]) {
+      expect(resolveWebDocumentLinkAction(href)).toEqual({
+        type: "ignore"
+      });
+    }
+  });
+});
@@ -0,0 +1,77 @@
+import { describe, expect, it } from "vitest";
+import { getDocumentShortcut } from "../src/document-shortcuts";
+
+function shortcutEvent(
+  key: string,
+  overrides: Partial<Parameters<typeof getDocumentShortcut>[0]> = {}
+) {
+  return {
+    key,
+    ctrlKey: true,
+    metaKey: false,
+    altKey: false,
+    shiftKey: false,
+    isComposing: false,
+    repeat: false,
+    ...overrides
+  };
+}
+
+describe("文档快捷键", () => {
+  it("在桌面端识别新建、保存、另存为和关闭", () => {
+    expect(getDocumentShortcut(shortcutEvent("n"), true)).toBe("new");
+    expect(getDocumentShortcut(shortcutEvent("S"), true)).toBe("save");
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("S", { shiftKey: true }),
+        true
+      )
+    ).toBe("save-as");
+    expect(getDocumentShortcut(shortcutEvent("w"), true)).toBe("close");
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("s", { ctrlKey: false, metaKey: true }),
+        true
+      )
+    ).toBe("save");
+  });
+
+  it("Web 端只接管保存", () => {
+    expect(getDocumentShortcut(shortcutEvent("n"), false)).toBeUndefined();
+    expect(getDocumentShortcut(shortcutEvent("w"), false)).toBeUndefined();
+    expect(getDocumentShortcut(shortcutEvent("s"), false)).toBe("save");
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("s", { shiftKey: true }),
+        false
+      )
+    ).toBeUndefined();
+  });
+
+  it("忽略组合输入、长按和带附加修饰键的按键", () => {
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("s", { isComposing: true }),
+        true
+      )
+    ).toBeUndefined();
+    expect(
+      getDocumentShortcut(shortcutEvent("s", { repeat: true }), true)
+    ).toBeUndefined();
+    expect(
+      getDocumentShortcut(shortcutEvent("s", { altKey: true }), true)
+    ).toBeUndefined();
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("n", { shiftKey: true }),
+        true
+      )
+    ).toBeUndefined();
+    expect(
+      getDocumentShortcut(
+        shortcutEvent("s", { shiftKey: true, altKey: true }),
+        true
+      )
+    ).toBeUndefined();
+  });
+});
@@ -2,7 +2,8 @@ import { describe, expect, it } from "vitest";
 import { defaultExportConfig } from "@md-to-pdf/core";
 import {
  EXPORT_CONFIG_STORAGE_KEY,
-  LEGACY_EXPORT_CONFIG_STORAGE_KEY,
+  LEGACY_EXPORT_CONFIG_V2_STORAGE_KEY,
+  LEGACY_EXPORT_CONFIG_V3_STORAGE_KEY,
  loadExportConfig,
  parseStoredExportConfig,
  saveExportConfig
@@ -10,14 +11,15 @@ import {

 function createMemoryStorage(
  initialValue: string | null = null,
-  legacyValue: string | null = null
+  legacyValue: string | null = null,
+  legacyKey = LEGACY_EXPORT_CONFIG_V3_STORAGE_KEY
 ) {
  const values = new Map<string, string>();
  if (initialValue) {
    values.set(EXPORT_CONFIG_STORAGE_KEY, initialValue);
  }
  if (legacyValue) {
-    values.set(LEGACY_EXPORT_CONFIG_STORAGE_KEY, legacyValue);
+    values.set(legacyKey, legacyValue);
  }
  return {
    getItem(key: string) {
@@ -52,26 +54,106 @@ describe("导出设置缓存", () => {
    ).toEqual(defaultExportConfig);
  });

-  it("将 v2 缓存迁移为 v3 并保留已有设置", () => {
+  it("将 v2 缓存迁移为 v4 并让默认页边距跟随主题", () => {
    const legacyConfig = {
      ...defaultExportConfig,
      version: 2,
      mermaid: undefined,
      paper: {
        ...defaultExportConfig.paper,
+        marginMode: undefined,
        format: "A5"
      }
    };
    const storage = createMemoryStorage(
      null,
-      JSON.stringify(legacyConfig)
+      JSON.stringify(legacyConfig),
+      LEGACY_EXPORT_CONFIG_V2_STORAGE_KEY
    );

    const migrated = loadExportConfig(storage);
-    expect(migrated.version).toBe(3);
+    expect(migrated.version).toBe(4);
    expect(migrated.paper.format).toBe("A5");
+    expect(migrated.paper.marginMode).toBe("theme");
    expect(migrated.mermaid).toEqual(defaultExportConfig.mermaid);
-    expect(storage.read()).toContain('"version":3');
+    expect(storage.read()).toContain('"version":4');
+  });
+
+  it("将改过页边距的 v3 缓存迁移为自定义模式", () => {
+    const legacyConfig = {
+      ...defaultExportConfig,
+      version: 3,
+      paper: {
+        ...defaultExportConfig.paper,
+        marginMode: undefined,
+        margins: {
+          top: "20mm",
+          right: "18mm",
+          bottom: "20mm",
+          left: "18mm"
+        }
+      }
+    };
+    const migrated = parseStoredExportConfig(
+      JSON.stringify(legacyConfig)
+    );
+
+    expect(migrated.version).toBe(4);
+    expect(migrated.paper.marginMode).toBe("custom");
+    expect(migrated.paper.margins).toEqual(legacyConfig.paper.margins);
+  });
+
+  it("将未改页眉页码的旧 v4 缓存迁移为跟随主题", () => {
+    const legacyConfig = {
+      ...defaultExportConfig,
+      pageDecorationsMode: undefined,
+      header: {
+        ...defaultExportConfig.header,
+        fontFamily: undefined
+      },
+      footer: {
+        ...defaultExportConfig.footer,
+        fontFamily: undefined,
+        showOnFirstPage: undefined
+      }
+    };
+    const migrated = parseStoredExportConfig(
+      JSON.stringify(legacyConfig)
+    );
+
+    expect(migrated.pageDecorationsMode).toBe("theme");
+    expect(migrated.header.fontFamily).toContain("Microsoft YaHei");
+    expect(migrated.footer.showOnFirstPage).toBe(true);
+  });
+
+  it("保留旧 v4 缓存中用户修改过的页眉页码", () => {
+    const legacyConfig = {
+      ...defaultExportConfig,
+      pageDecorationsMode: undefined,
+      header: {
+        ...defaultExportConfig.header,
+        enabled: true,
+        fontFamily: undefined,
+        center: {
+          enabled: true,
+          content: "${title}"
+        }
+      },
+      footer: {
+        ...defaultExportConfig.footer,
+        alignment: "right",
+        fontFamily: undefined,
+        showOnFirstPage: undefined
+      }
+    };
+    const migrated = parseStoredExportConfig(
+      JSON.stringify(legacyConfig)
+    );
+
+    expect(migrated.pageDecorationsMode).toBe("custom");
+    expect(migrated.header.enabled).toBe(true);
+    expect(migrated.header.center.content).toBe("${title}");
+    expect(migrated.footer.alignment).toBe("right");
  });

  it("保存并恢复经过校验的配置", () => {
@@ -0,0 +1,118 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it, vi } from "vitest";
+import { encodeLocalDocumentLinkForPdf } from "@md-to-pdf/core";
+import {
+  createPdfAnnotationLinkService,
+  resolvePdfDestinationPage,
+  resolvePdfNamedActionPage
+} from "../src/pdf-annotation-links";
+
+function createDocument() {
+  return {
+    numPages: 5,
+    getDestination: vi.fn(async (name: string) =>
+      name === "chapter" ? [{ num: 7, gen: 0 }] : null
+    ),
+    getPageIndex: vi.fn(async () => 2)
+  };
+}
+
+describe("PDF 精确预览链接服务", () => {
+  it("解析命名目标、显式引用和页索引目标", async () => {
+    const pdfDocument = createDocument();
+
+    await expect(
+      resolvePdfDestinationPage(pdfDocument, "chapter")
+    ).resolves.toBe(3);
+    await expect(
+      resolvePdfDestinationPage(pdfDocument, [1, { name: "Fit" }])
+    ).resolves.toBe(2);
+    await expect(
+      resolvePdfDestinationPage(pdfDocument, "missing")
+    ).resolves.toBeUndefined();
+  });
+
+  it("将外部 URI 交给平台链接策略且阻止默认导航", () => {
+    const onExternalLink = vi.fn();
+    const service = createPdfAnnotationLinkService(
+      createDocument(),
+      2,
+      {
+        onExternalLink,
+        onNavigateToPage: vi.fn()
+      }
+    );
+    const link = document.createElement("a");
+    service.addLinkAttributes(
+      link,
+      "https://example.com/document"
+    );
+    document.body.append(link);
+
+    expect(link.dataset.pdfExternalHref).toBe(
+      "https://example.com/document"
+    );
+    expect(link.rel).toBe("noopener noreferrer");
+    expect(
+      link.dispatchEvent(
+        new MouseEvent("click", {
+          bubbles: true,
+          cancelable: true
+        })
+      )
+    ).toBe(false);
+    expect(onExternalLink).toHaveBeenCalledWith(
+      "https://example.com/document"
+    );
+  });
+
+  it("在交给平台策略前还原 PDF 中编码的本地链接", () => {
+    const onExternalLink = vi.fn();
+    const service = createPdfAnnotationLinkService(
+      createDocument(),
+      2,
+      {
+        onExternalLink,
+        onNavigateToPage: vi.fn()
+      }
+    );
+    const link = document.createElement("a");
+    service.addLinkAttributes(
+      link,
+      encodeLocalDocumentLinkForPdf("../README.md") ?? ""
+    );
+
+    expect(link.dataset.pdfExternalHref).toBe("../README.md");
+    link.click();
+    expect(onExternalLink).toHaveBeenCalledWith("../README.md");
+  });
+
+  it("导航到 PDF 内部目标并忽略损坏目标", async () => {
+    const onNavigateToPage = vi.fn();
+    const service = createPdfAnnotationLinkService(
+      createDocument(),
+      2,
+      {
+        onExternalLink: vi.fn(),
+        onNavigateToPage
+      }
+    );
+
+    await service.goToDestination("chapter");
+    await service.goToDestination("missing");
+
+    expect(onNavigateToPage).toHaveBeenCalledTimes(1);
+    expect(onNavigateToPage).toHaveBeenCalledWith(3);
+  });
+
+  it("只处理受支持的 PDF 命名翻页动作", () => {
+    expect(resolvePdfNamedActionPage("FirstPage", 3, 5)).toBe(1);
+    expect(resolvePdfNamedActionPage("LastPage", 3, 5)).toBe(5);
+    expect(resolvePdfNamedActionPage("NextPage", 5, 5)).toBe(5);
+    expect(resolvePdfNamedActionPage("PrevPage", 1, 5)).toBe(1);
+    expect(
+      resolvePdfNamedActionPage("Print", 3, 5)
+    ).toBeUndefined();
+  });
+});
@@ -0,0 +1,81 @@
+import { inflateSync } from "node:zlib";
+import { describe, expect, it } from "vitest";
+import { sampleMarkdown } from "../src/sample-markdown";
+
+function readPngDimensions(base64: string) {
+  const png = Buffer.from(base64, "base64");
+  expect(png.subarray(0, 8)).toEqual(
+    Buffer.from([137, 80, 78, 71, 13, 10, 26, 10])
+  );
+  const width = png.readUInt32BE(16);
+  const height = png.readUInt32BE(20);
+  const bitDepth = png[24] ?? 0;
+  const colorType = png[25] ?? 0;
+  const samplesPerPixel =
+    colorType === 0 || colorType === 3
+      ? 1
+      : colorType === 2
+        ? 3
+        : colorType === 4
+          ? 2
+          : 4;
+  const idatParts: Buffer[] = [];
+  let offset = 8;
+  while (offset + 12 <= png.length) {
+    const length = png.readUInt32BE(offset);
+    const type = png.toString("ascii", offset + 4, offset + 8);
+    if (type === "IDAT") {
+      idatParts.push(
+        png.subarray(offset + 8, offset + 8 + length)
+      );
+    }
+    offset += 12 + length;
+  }
+  const decoded = inflateSync(Buffer.concat(idatParts));
+  const rowBytes = Math.ceil(
+    (width * bitDepth * samplesPerPixel) / 8
+  );
+  expect(decoded.length).toBe((rowBytes + 1) * height);
+  return { width, height };
+}
+
+describe("默认示例 Markdown", () => {
+  it("仅保留一张网络图片并提供三种 Base64 图片尺寸", () => {
+    expect(
+      sampleMarkdown.match(/https?:\/\/[^\s)]+/gu)
+    ).toHaveLength(1);
+    expect(
+      sampleMarkdown.match(/data:image\/png;base64,/gu)
+    ).toHaveLength(3);
+    expect(sampleMarkdown).toContain("1600×900");
+    expect(sampleMarkdown).toContain("900×1800");
+    expect(sampleMarkdown).toContain("1200×880");
+  });
+
+  it("所有内嵌 PNG 均可完整解压且尺寸符合描述", () => {
+    const images = Array.from(
+      sampleMarkdown.matchAll(
+        /data:image\/png;base64,([A-Za-z0-9+/=]+)/gu
+      ),
+      (match) => readPngDimensions(match[1] ?? "")
+    );
+    expect(images).toEqual([
+      { width: 1600, height: 900 },
+      { width: 900, height: 1800 },
+      { width: 1200, height: 880 }
+    ]);
+  });
+
+  it("覆盖 Mermaid、ECharts 分档和串行媒体场景", () => {
+    expect(
+      sampleMarkdown.match(/```mermaid/gu)
+    ).toHaveLength(3);
+    expect(
+      sampleMarkdown.match(/```echarts/gu)
+    ).toHaveLength(4);
+    expect(sampleMarkdown).toContain("height: 40mm");
+    expect(sampleMarkdown).toContain("height: 58mm");
+    expect(sampleMarkdown).toContain("height: 85mm");
+    expect(sampleMarkdown).toContain("## 串行媒体块");
+  });
+});
@@ -0,0 +1,38 @@
+import { describe, expect, it } from "vitest";
+import type { ThemeSummary } from "../src/application-backend";
+import { groupThemesByCategory } from "../src/theme-groups";
+
+function createTheme(
+  id: string,
+  name: string,
+  category: ThemeSummary["category"]
+): ThemeSummary {
+  return {
+    id,
+    name,
+    category,
+    version: "1.0.0",
+    description: "",
+    compatibleProfiles: [],
+    bundled: true,
+    source: "bundled"
+  };
+}
+
+describe("groupThemesByCategory", () => {
+  it("按稳定顺序输出非空主题分组", () => {
+    const groups = groupThemesByCategory([
+      createTheme("tender", "标书", "tender"),
+      createTheme("general", "通用", "general"),
+      createTheme("red", "红头", "red-letter")
+    ]);
+
+    expect(groups.map(({ category, label }) => ({ category, label })))
+      .toEqual([
+        { category: "general", label: "通用主题" },
+        { category: "red-letter", label: "政企红头" },
+        { category: "tender", label: "标书正式" }
+      ]);
+    expect(groups[0]?.themes[0]?.id).toBe("general");
+  });
+});
@@ -0,0 +1,140 @@
+import { describe, expect, it } from "vitest";
+import { defaultExportConfig } from "@md-to-pdf/core";
+import type { ThemeSummary } from "../src/application-backend";
+import {
+  applyThemeDefaults,
+  applyThemeMargins,
+  selectTheme
+} from "../src/theme-margins";
+
+function createTheme(
+  id: string,
+  margins?: ThemeSummary["pageDefaults"]
+): ThemeSummary {
+  return {
+    id,
+    name: id,
+    version: "1.0.0",
+    description: "",
+    category: "formal",
+    compatibleProfiles: [],
+    pageDefaults: margins,
+    bundled: true,
+    source: "bundled"
+  };
+}
+
+const formalTheme = createTheme("formal", {
+  margins: {
+    top: "37mm",
+    right: "26mm",
+    bottom: "35mm",
+    left: "28mm"
+  }
+});
+
+const officialTheme = createTheme("official", {
+  ...formalTheme.pageDefaults,
+  header: {
+    ...defaultExportConfig.header,
+    fontFamily: '"Mdpdf Fandol Song", SimSun, serif'
+  },
+  footer: {
+    ...defaultExportConfig.footer,
+    height: "7mm",
+    fontSize: "4.94mm",
+    fontFamily: '"Mdpdf Fandol Song", SimSun, serif',
+    color: "#000000",
+    alignment: "outer",
+    format: "official-page",
+    showOnFirstPage: false
+  }
+});
+
+describe("主题推荐页边距", () => {
+  it("跟随模式切换主题时同步推荐值", () => {
+    const selected = selectTheme(defaultExportConfig, formalTheme);
+
+    expect(selected.themeId).toBe("formal");
+    expect(selected.paper.marginMode).toBe("theme");
+    expect(selected.paper.margins).toEqual(
+      formalTheme.pageDefaults?.margins
+    );
+  });
+
+  it("主题未声明推荐值时恢复全局 16mm", () => {
+    const config = selectTheme(defaultExportConfig, formalTheme);
+    const selected = selectTheme(config, createTheme("general"));
+
+    expect(selected.paper.margins).toEqual({
+      top: "16mm",
+      right: "16mm",
+      bottom: "16mm",
+      left: "16mm"
+    });
+  });
+
+  it("自定义模式切换主题时保留用户值", () => {
+    const config = {
+      ...defaultExportConfig,
+      paper: {
+        ...defaultExportConfig.paper,
+        marginMode: "custom" as const,
+        margins: {
+          top: "20mm",
+          right: "18mm",
+          bottom: "20mm",
+          left: "18mm"
+        }
+      }
+    };
+    const selected = selectTheme(config, formalTheme);
+
+    expect(selected.themeId).toBe("formal");
+    expect(selected.paper.margins).toEqual(config.paper.margins);
+  });
+
+  it("主题清单加载后补齐当前主题推荐值", () => {
+    expect(
+      applyThemeMargins(defaultExportConfig, formalTheme).paper.margins
+    ).toEqual(formalTheme.pageDefaults?.margins);
+  });
+
+  it("跟随主题时同步推荐的页眉和页码", () => {
+    const selected = selectTheme(defaultExportConfig, officialTheme);
+
+    expect(selected.pageDecorationsMode).toBe("theme");
+    expect(selected.header.fontFamily).toContain("Fandol Song");
+    expect(selected.footer).toMatchObject({
+      alignment: "outer",
+      format: "official-page",
+      showOnFirstPage: false
+    });
+  });
+
+  it("页面装饰自定义模式切换主题时保留用户配置", () => {
+    const config = {
+      ...defaultExportConfig,
+      pageDecorationsMode: "custom" as const,
+      footer: {
+        ...defaultExportConfig.footer,
+        alignment: "left" as const,
+        format: "page" as const
+      }
+    };
+    const selected = selectTheme(config, officialTheme);
+
+    expect(selected.header).toEqual(config.header);
+    expect(selected.footer).toEqual(config.footer);
+  });
+
+  it("主题清单加载后补齐当前主题页面装饰", () => {
+    const applied = applyThemeDefaults(
+      defaultExportConfig,
+      officialTheme
+    );
+
+    expect(applied.footer.format).toBe("official-page");
+    expect(applied.footer.alignment).toBe("outer");
+  });
+});
@@ -13,6 +13,7 @@ COPY apps/web/package.json apps/web/package.json
 COPY packages/core/package.json packages/core/package.json
 COPY packages/application/package.json packages/application/package.json
 COPY packages/markdown-echarts/package.json packages/markdown-echarts/package.json
+COPY packages/preview-engine/package.json packages/preview-engine/package.json
 COPY packages/renderer/package.json packages/renderer/package.json
 RUN npm ci

@@ -20,10 +21,12 @@ COPY tsconfig.base.json ./
 COPY apps ./apps
 COPY packages ./packages
 COPY logos ./logos
+COPY samples ./samples
 RUN npm run build -w @md-to-pdf/markdown-echarts \
    && npm run build -w @md-to-pdf/core \
    && 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 \
    && npm run build -w @md-to-pdf/server

@@ -38,6 +41,7 @@ COPY apps/web/package.json apps/web/package.json
 COPY packages/core/package.json packages/core/package.json
 COPY packages/application/package.json packages/application/package.json
 COPY packages/markdown-echarts/package.json packages/markdown-echarts/package.json
+COPY packages/preview-engine/package.json packages/preview-engine/package.json
 COPY packages/renderer/package.json packages/renderer/package.json
 RUN npm ci --omit=dev --workspace @md-to-pdf/server --include-workspace-root

@@ -67,6 +71,7 @@ COPY --chown=pwuser:pwuser apps/web/package.json apps/web/package.json
 COPY --chown=pwuser:pwuser packages/core/package.json packages/core/package.json
 COPY --chown=pwuser:pwuser packages/application/package.json packages/application/package.json
 COPY --chown=pwuser:pwuser packages/markdown-echarts/package.json packages/markdown-echarts/package.json
+COPY --chown=pwuser:pwuser packages/preview-engine/package.json packages/preview-engine/package.json
 COPY --chown=pwuser:pwuser packages/renderer/package.json packages/renderer/package.json
 COPY --chown=pwuser:pwuser --from=production-dependencies /app/node_modules ./node_modules
 ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
@@ -83,7 +88,9 @@ COPY --chown=pwuser:pwuser --from=build /app/apps/web/dist ./apps/web/dist
 COPY --chown=pwuser:pwuser --from=build /app/packages/core/dist ./packages/core/dist
 COPY --chown=pwuser:pwuser --from=build /app/packages/application/dist ./packages/application/dist
 COPY --chown=pwuser:pwuser --from=build /app/packages/markdown-echarts/dist ./packages/markdown-echarts/dist
+COPY --chown=pwuser:pwuser --from=build /app/packages/preview-engine/dist ./packages/preview-engine/dist
 COPY --chown=pwuser:pwuser --from=build /app/packages/renderer/dist ./packages/renderer/dist
+COPY --chown=pwuser:pwuser --from=build /app/samples ./samples
 COPY --chown=pwuser:pwuser themes ./themes
 COPY deploy/nginx.conf /etc/nginx/nginx.conf
 COPY --chown=pwuser:pwuser deploy/entrypoint.sh /app/deploy/entrypoint.sh
@@ -37,7 +37,7 @@ docker compose -f deploy\compose.yaml down
 可以直接指定版本化镜像名称构建：

 ```powershell
-$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.4.1'
+$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.5.1'
 docker compose -f deploy\compose.yaml build
 ```

@@ -47,13 +47,13 @@ docker compose -f deploy\compose.yaml build
 已经保留同版本系列的已验证镜像，可在内网或软件源较慢时复用其运行层：

 ```powershell
-$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.4.1'
-$env:MD_TO_PDF_RUNTIME_BASE_IMAGE = 'yixiong/md-to-pdf:v0.3.1'
+$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.5.1'
+$env:MD_TO_PDF_RUNTIME_BASE_IMAGE = 'yixiong/md-to-pdf:v0.4.5'
 $env:MD_TO_PDF_REUSE_PLAYWRIGHT_RUNTIME = '1'
 docker compose -f deploy\compose.yaml build
 ```

-复用模式会校验基础镜像中存在 Chromium，再覆盖 v0.4.1 应用代码和生产
+复用模式会校验基础镜像中存在 Chromium，再覆盖 v0.5.1 应用代码和生产
 依赖。正式跨机器构建仍建议使用默认完整路径。

 ## 主题挂载
@@ -69,9 +69,9 @@ docker compose -f deploy\compose.yaml up -d
 目录下每套主题都应包含 `theme.json`。主题规范详见
 [`docs/THEMES.md`](../docs/THEMES.md)。

-从 v0.4.0 起，公司内部私有版本已内置 GitHub、Pixyll 和 Whitey 三套
-Typora 默认主题；挂载目录仍可用于本机扩展主题。内置主题与挂载主题 ID
-重复时以内置版本为准。
+当前内置 4 套 Typora 风格主题、4 套红头主题、3 套正式文档主题和
+3 套标书主题；挂载目录只用于额外的本机扩展主题，无需重复
+放置内置主题。内置主题与挂载主题 ID 重复时以内置版本为准。

 ## 运行参数

@@ -1,6 +1,6 @@
 # Markdown PDF 导出器进度

-最后更新：2026-07-27
+最后更新：2026-07-29

 ## 1. 当前概况

@@ -41,6 +41,26 @@ Web/Compose 发布仍保持 `v0.4.1`。
 `v0.4.3` 将桌面发行包迁移为标准 NSIS 安装向导，并使用全英文、无空格、
 包含版本与平台的安装包文件名；Web/Compose 发布仍保持 `v0.4.1`。

+`v0.4.4` 仅精简 Electron 桌面发行包的语言资源，保留简体中文和英文；
+Web/Compose 发布仍保持 `v0.4.1`。
+
+`v0.4.5` 同步更新 Web 与 Desktop：新增新建/保存 Markdown、桌面文件
+关联、窗口状态恢复、自定义主题目录和收纳式“更多”菜单；Web 明确取消
+本地素材目录。图片、Mermaid 与 ECharts 的分页算法统一为按文档顺序
+串行计算的媒体块回填，每个媒体元素至多重排一次，标题保持原尺寸。
+
+`v0.5.0` 完成渲染架构和桌面文档工作流升级：分页与连续预览抽取为共享
+`packages/preview-engine`，快速预览支持从修改位置复用稳定前缀；Web
+增加连续预览和受控外链，Desktop 支持多窗口、同文件单例、本地链接及
+聚焦时外部文件变化提示。四套主题统一命名，并修复围栏代码块的 Typora
+DOM 兼容和桌面发行包复用陈旧 Web 产物的问题。
+
+`v0.5.1` 正式版新增 10 套政企与标书主题、规范页边距和页面装饰、
+结构化公文 Front Matter、内置中文字体、教程及 14 份主题示例；同时
+重组“更多”菜单，补齐桌面文件快捷键、未保存确认和跟随新路径的另存为，
+并修复红头标题居中、代码块自动换行、左侧内容留白和跨页分页。Windows
+安装包、Docker Compose、本机安装与发布验证均已完成。
+
 ## 2. 已完成

 ### 2.1 项目骨架
@@ -426,9 +446,144 @@ Web/Compose 发布仍保持 `v0.4.1`。
 - 安装包和校验文件作为 Gitea `v0.4.3` Release 附件发布，不写入 Git
  历史。

+### 3.17 v0.4.4 桌面语言包精简
+
+- Electron 发行包只保留 `zh-CN` 和 `en-US` 两种 Chromium 语言资源。
+- 不裁剪 ICU、ANGLE、Direct3D、Dawn、SwiftShader 或其他 Chromium
+  运行时组件，保证桌面预览与 PDF 导出在不同图形环境下的可靠性。
+- 本版本只重新生成桌面安装包和免安装 ZIP；Web/Compose 发布继续保持
+  `v0.4.1`。
+
+### 3.18 v0.4.5 文档工作流与媒体分页
+
+- Web 与 Desktop 均支持新建 Markdown；未保存时使用“未命名文档”状态，
+  不显示伪造源文件名，并允许直接导出 PDF。
+- Web 保存使用浏览器下载；Desktop 使用原生另存为。默认文件名优先取
+  第一个一级标题，没有一级标题时取首行可见文本，并清理 Windows 非法
+  字符、保留名和末尾空格或句点。
+- “打开 Markdown”继续作为顶部独立强操作；新建、保存及桌面自定义主题
+  目录收纳到“更多”菜单，Web 不再显示本地素材目录入口。
+- Windows 安装包注册 `.md` 和 `.markdown` 文件关联；系统打开文件会
+  转交给现有单实例窗口并自动加载。
+- Desktop 监听窗口位置、尺寸和最大化变化，延迟写入完整状态；退出前
+  刷新待写状态。下次启动按当前显示器工作区限制尺寸并修正坐标，避免
+  多显示器断开后窗口落在屏幕外。
+- Desktop 会建立自定义主题目录，“更多”菜单可直接在资源管理器打开；
+  目录允许留空，放入合法主题后由共享主题注册器读取。
+- 图片、Mermaid 和 ECharts 统一视为带标题的媒体块。分页按 DOM 文档
+  顺序串行处理，每个媒体元素只允许一次回填或缩放重排。
+- 图片基准高度按原尺寸先收缩到内容限宽后计算；媒体块只有在上一页空白
+  与所需空间比例达到阈值时才尝试回填。缩放只作用于图片或图表内容，
+  标题保持原字号和自然高度。
+- ECharts 在分页前冻结为 SVG 图片，三类媒体共享回填决策与边界检查；
+  无法安全回填时仍移至下一页，保证顺序、不跨页且不覆盖后续内容。
+- 默认示例仅保留一张网络图片，并新增有效 Base64 横图、不同尺寸图片、
+  Mermaid 和 ECharts，用于观察媒体分页、标题配对和渲染效果。
+- 根 README、Desktop README、四个工作区包 README、进度文档和发布
+  规范随版本同步更新。
+
+### 3.19 v0.5.0 共享预览引擎与桌面多窗口
+
+- 新增 `packages/preview-engine`，从 `apps/web` 抽取 Paged.js 运行时、
+  Mermaid、ECharts、图片尺寸适配、媒体回填、跨页表格和共享页面 CSS。
+- Web 快速预览、服务端 Playwright PDF 与 Electron PDF 直接使用同一个
+  Preview Engine；Markdown 解析仍由 `packages/renderer` 的 markdown-it
+  管线负责，应用服务继续统一主题与图片资源。
+- 新增“连续”预览模式，不创建纸张和分页节点，适合高频编辑；快速预览
+  保留分页反馈，精确预览与最终 PDF 继续作为权威结果。
+- 增量分页根据源块稳定身份识别最早修改位置，复用此前稳定分页前缀，并
+  串行重算受影响后缀；最终 PDF 不依赖客户端缓存。
+- Web 只处理当前文档锚点和 HTTP/HTTPS 外链，外链使用浏览器新窗口；
+  本地路径及不支持协议不会替换预览 iframe。
+- Desktop 支持 HTTP/HTTPS、系统协议、相对或绝对本地路径及 `file:`
+  URI；Markdown 链接提示在当前窗口或新窗口打开。
+- Desktop 改为多窗口，并按规范化文件路径保持同一文件单例；窗口聚焦时
+  比较磁盘修改时间，检测到外部变化后提示是否重新加载。
+- 主窗口关闭后会选取仍存活的最新窗口作为状态持久化主窗口；窗口位置、
+  尺寸和最大化状态仍按约 2 秒防抖写入并在启动时修正到可见工作区。
+- Core 新增跨端文档链接分类与 PDF 本地链接编码协议；精确 PDF 使用
+  `mdpdf.local.invalid` 暂存本地链接，PDF.js 注释层解码后交给平台。
+- 内置主题名称统一为 Typora Github、Typora Pixyll、Typora whitey 和
+  Typora Clean，默认主题为 Typora Github；删除强制覆盖主题链接样式的
+  `!important`，保留主题自身设计。
+- markdown-it 普通围栏输出 `pre.md-fences` 和可选 `lang`；Preview
+  Engine 仅重置内部语义 `code` 的重复行内盒模型，代码块与行内代码均
+  保持主题预期，Mermaid/ECharts 专用围栏不受影响。
+- 根级 `build:web-runtime` 统一内嵌 Web 的六个工作区构建顺序；Desktop
+  `package` 和 `make` 强制先调用该脚本，防止安装包复制陈旧
+  `apps/web/dist`。
+
+### 3.20 v0.5.1 正式文档主题与桌面文件工作流
+
+- 围栏代码按正文宽度自动换行，长单词允许安全断行；代码内容统一保留
+  `8px` 左侧内边距，并保留代码块外框、语法高亮和 Typora 兼容 DOM。
+- 多行代码块按至少两行一组生成可分页分片，当前页能容纳一组时不再将
+  整块代码推到下一页；跨页分片保持连续边框和完整文本。
+- 新增政企标准红头、函件红头、企业简版红头、简报红头 4 套红头主题，
+  正式制度、正式报告、可研报告 3 套正式文档主题，以及经典标书、商务蓝
+  标书、暗标 3 套标书主题。
+- 主题清单新增分类、文档结构预设、推荐导出设置和页面装饰；没有主题推荐
+  时保持 16mm 默认页边距，正式主题自动采用规范页边距、页眉页脚和页码。
+- Renderer 根据结构化 Front Matter 生成红头、文号、签发人、密级、
+  主送、正文、附件、落款、抄送和印发信息，也支持项目报告与标书封面。
+- 红头标题使用居中网格布局，签发人不再挤压发文机关；正文、红头标题、
+  页眉页脚使用主题内置 Fandol 中文字体，降低跨机器显示差异。
+- `samples/tutorials` 内置 ECharts 和公文主题教程，包含 YAML 示例、
+  字段说明、图表标题和图例渲染；公文教程保持 Typora Github 阅读主题。
+- `samples/themes` 为全部 14 套主题提供示例；Desktop 发行配置将教程、
+  示例和字体随应用复制，打开主题示例时自动切换相应主题。
+- 移除顶部加号入口，将文件操作、教程与示例、主题管理整合为三个菜单
+  分区；文件操作统一命名为“新建文件”“保存文件”“另存为文件”。
+- Desktop 支持 `Ctrl+N`、`Ctrl+W`、`Ctrl+S`、`Ctrl+Shift+S`，新建和
+  关闭时对未保存内容进行确认；另存为成功后当前窗口追踪新文件路径，
+  Web 端不显示或拦截“另存为”。
+
 ## 4. 已执行验证

-2026-07-27 在当前完整工作区成功执行：
+2026-07-29 对 v0.5.1 完整工作区及最终代码块修复执行：
+
+```text
+npm test
+npm run typecheck
+npm run build
+git diff --check
+```
+
+- 最终修复前的完整工作区共 65 个测试文件、286 项测试全部通过；将
+  左侧内边距调整到共享分页规则后，Preview Engine 18 项和 Application
+  9 项定向测试再次通过；
+- Markdown ECharts、Core、Renderer、Application、Preview Engine、
+  Web、Server 和 Desktop 类型检查全部通过；
+- Web 生产资源、Server 和 Desktop 主进程/Preload 构建通过，生产资源
+  中的应用版本为 `0.5.1`；
+- 保留的手动验收服务继续运行：Web 与主题 API 均返回 HTTP 200，
+  Electron 应用及其 GPU、网络、渲染进程正常存活；
+- `git diff --check` 通过，仅有 Git 对 Windows 工作区换行转换的提示。
+- v0.5.1 Windows 目录版、NSIS 和 ZIP 经完整内嵌 Web 重建后生成；
+  目录版主程序文件版本为 `0.5.1`、产品版本为 `0.5.1.0`，启动后正常
+  响应，并保留独立验收窗口。
+- 目录版包含 14 套主题、14 份主题示例、2 份教程、5 个 Fandol WOFF2
+  中文字体及其许可文件，语言包仅保留 `zh-CN` 和 `en-US`；ZIP 中同样
+  检出主题、示例和字体资源。
+- NSIS 安装包 `md-to-pdf-0.5.1-x86_64-Setup.exe` 为 114,688,014
+  字节，SHA-256 为
+  `676CCE73D782B0B15AC6BC68F253CFBC4740383583E4DAA98F746EDF9999C5CC`。
+- 免安装包 `md-to-pdf-0.5.1-x86_64.zip` 为 152,183,607 字节，
+  SHA-256 为
+  `82BF6ADF1200604F145CC86FA3ED193955CF6741EBEE3DF8953483515CFF621F`。
+- 主程序与安装包 Authenticode 状态均为未签名，与当前发行说明一致。
+- 正式镜像 `yixiong/md-to-pdf:v0.5.1` 内容 ID 为
+  `sha256:72f519a69bfd6cb2f6df30c2be938e58ceb6f20e4748a32551874de3d436b276`；
+  Compose 强制替换后健康运行在 `http://localhost:8080`。
+- 容器确认包含 14 套主题和 17 份 Markdown 教程/示例；生产 Bundle
+  同时包含代码自动换行、任意长单词断行和 `8px` 左侧内边距。
+- 容器代码块回归 PDF 返回 HTTP 200，共 2 页、64,721 字节，
+  Mermaid/ECharts 错误数均为 0；视觉检查确认长 SQL 正确换行、跨页
+  连续、24 个字段完整且没有右侧越界。
+- 本机 NSIS 安装项版本为 `0.5.1`，发布者为 `YIXIONG Tech.ltd`；
+  用户完成安装和桌面端手动验收，未发现发布阻塞问题。
+
+2026-07-28 在当前完整工作区成功执行：

 ```text
 npm test
@@ -440,17 +595,73 @@ git diff --check
 结果：

 - ECharts 围栏测试：36 项通过；
- 共享配置测试：9 项通过；
- 渲染器测试：10 项通过；
- 应用服务测试：5 项通过；
- 前端测试：67 项通过；
+- Core 共享协议测试：15 项通过；
+- 渲染器测试：14 项通过；
+- 应用服务测试：11 项通过；
+- Preview Engine 测试：53 项通过；
+- 前端测试：54 项通过；
 - 后端测试：29 项通过；
- 桌面端测试：7 项通过；
- 全项目共 171 项测试通过；
+- 桌面端测试：26 项通过；
+- 全项目共 238 项测试通过；
 - 全项目类型检查通过；
 - 生产构建通过；
 - `git diff --check` 通过。

+`v0.5.0` 双端与发行验收结果：
+
+- 正式镜像 `yixiong/md-to-pdf:v0.5.0` 内容 ID 为
+  `sha256:13a0955f3629e4e96d7af9d38230ead5ff6b8b70be2b35d5f8da9fdeb1f66474`，
+  大小 640,294,504 字节；Compose 使用该内容 ID 健康运行在
+  `http://localhost:8080`。
+- Web 快速、连续和精确预览完成真实浏览器验证：连续模式只有外层滚动，
+  ECharts 使用完整内容宽度和配置高度；快速预览后缀编辑保留稳定前缀。
+- Web 外链样式、受控新窗口和本地链接禁用通过；精确 PDF 注释层保留
+  HTTP/HTTPS 与锚点，并能将 `.invalid` 地址解码为原始本地路径。
+- Desktop 多窗口、同一文件单例、主窗口关闭后的状态接管、最大化防抖
+  写入和重启恢复通过；本机安装版已升级至 v0.5.0。
+- 围栏代码块在 Typora Github 中显示完整外框且内部不再逐行出现行内
+  代码方框；Web 与最终 Desktop 安装版均由用户确认，ECharts 围栏未受
+  普通代码块兼容样式影响。
+- 正式 NSIS 为 `md-to-pdf-0.5.0-x86_64-Setup.exe`，95,004,759
+  字节，SHA-256 为
+  `60992D1FDCA513F46346C78478537EB4159D8C0E76B41ECF3CDC25BE77707D92`。
+- 正式 ZIP 为 `md-to-pdf-0.5.0-x86_64.zip`，132,485,574 字节，
+  SHA-256 为
+  `D74F82293FB67126E583546CBA894569EFC9A0B1B6343FAC648CCC95F1D188D8`。
+- 安装版内嵌 `paged-preview` Bundle 与本地最新 Web Bundle 的
+  SHA-256 均为
+  `BD29762A2E3CF1A2AAC4DD055D623B42C754DF46A3E773DD99B01CDFDAE36CE5`；
+  `.md`、`.markdown` OpenWithProgids 注册正常。
+
+`v0.4.5` 双端与媒体分页验收结果：
+
+- 正式镜像 `yixiong/md-to-pdf:v0.4.5` 已完成多阶段构建，镜像内容 ID
+  为 `sha256:0703c3762cd0e4e551ce44732b064a938c2095eb331a22e28861a148fe520354`；
+  Compose 已强制替换为正式镜像并健康运行在 `http://localhost:8080`。
+- 正式镜像 PDF 冒烟请求返回 HTTP 200，生成 1 页、96,661 字节 PDF，
+  Mermaid 与 ECharts 错误数均为 0。
+- 默认示例在 Web 快速预览与精确预览中均为 10 页；12 个媒体块均只
+  出现一次，全部标题正确配对，无重叠、越界、解码或图表错误。
+- 容器生成 `output/pdf/v0.4.5-media-pagination-rc.pdf`，共 10 页、
+  928,803 字节；Mermaid 与 ECharts 错误数均为 0，逐页视觉检查通过。
+- Desktop 新建、输入、默认标题文件名保存、原生 PDF 导出均通过；
+  `output/桌面保存验收.md` 内容正确，Desktop README 导出 PDF 为 5 页。
+- 从第二实例系统打开 `README.md` 时保持单窗口并自动加载；自定义主题
+  目录能够打开且可识别已有主题。
+- 窗口最大化变化约 2 秒后写入状态；重启恢复最大化。窗口位置与尺寸
+  测试覆盖屏幕越界修正、最小尺寸、原子写入和损坏状态回退。
+- 正式 NSIS 安装包为 `md-to-pdf-0.4.5-x86_64-Setup.exe`，
+  94,998,489 字节，SHA-256 为
+  `9CBD6362E15AA745185805E753D5A7749434E0E142E6CE0F66463E6A19468F1D`。
+- 免安装包为 `md-to-pdf-0.4.5-x86_64.zip`，132,477,245 字节，
+  SHA-256 为
+  `97B2D44E72F626A3396E5AB5B330FFB7F9BECAF945A1707808C876940A82E850`。
+- 正式目录版主程序版本为 `0.4.5`，只包含 `zh-CN` 和 `en-US` 语言包，
+  Authenticode 状态为未签名，启动后应用与渲染进程均正常响应。
+- 本机当前用户安装已从 `0.4.3` 原位升级到 `0.4.5`；卸载注册信息、
+  桌面与开始菜单快捷方式、`.md` 和 `.markdown` 打开注册均验证通过，
+  安装版应用启动正常。
+
 Electron 桌面端第一阶段验证结果：

 - Electron 43.2.0 应用窗口成功加载现有 React/Vite 界面，标题旁正确显示
@@ -648,6 +859,22 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
  SHA-256 为
  `91BED88A7CB623B98383408D5553D80A6135FB94F7FE2D77A5FCED339CCF5BC6`。

+2026-07-27 已完成 `v0.4.4` 桌面语言包精简验证：
+
+- 目录版只包含 `zh-CN.pak` 和 `en-US.pak`，语言资源从 55 个、
+  48,911,653 字节降为 2 个、1,137,843 字节。
+- 目录版总大小从 378,084,454 字节降为 330,310,644 字节，减少
+  47,773,810 字节；Chromium 图形与软件渲染后备组件均保持完整。
+- Windows 主程序版本为 `0.4.4`，目录版成功启动并保持应用、GPU、
+  渲染器等 4 个 Electron 进程正常运行。
+- 正式安装包为 `md-to-pdf-0.4.4-x86_64-Setup.exe`，94,991,759 字节，
+  SHA-256 为
+  `0827FD87A8EEC8B034DF738909CB6A20231245B507AE4A0BAA579AFA03A942DE`，
+  Authenticode 状态为未签名。
+- 免安装包为 `md-to-pdf-0.4.4-x86_64.zip`，132,470,241 字节，
+  SHA-256 为
+  `D6CDB8DAE30676BAB6B2A037567164476AD294588B102A6FBBE9458ABCE5CCC0`。
+
 ## 5. 当前注意事项

 - `output/` 可能包含本地 PDF 验证产物，已被 Git 忽略，不得提交。
@@ -655,13 +882,18 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
 - `apps/web/src/use-markdown-render.ts` 负责 Markdown 防抖请求、取消和
  渲染错误状态。
 - `apps/web/src/use-theme-resources.ts` 负责主题清单、主题 CSS 和请求取消。
- `apps/web/src/paged-document-runtime.ts` 是快速预览和 PDF 共用的 Mermaid、资源等待和 Paged.js 分页运行时。
 - `apps/web/src/paged-preview-frame.ts` 负责 iframe 消息协议和运行目标选择。
- `apps/web/src/paged-preview.ts` 负责分页协议、共享文档 CSS、页眉和页码 CSS。
- `apps/web/src/mermaid-page-fit.ts` 负责超高 Mermaid 的单页等比例适配。
- `apps/web/src/mermaid-static-image.ts` 负责锁定 Mermaid 盒模型并转换为静态矢量 SVG 图片。
- `apps/web/src/paged-table-handler.ts` 负责跨页表格表头处理。
+- `packages/preview-engine/src/paged-document-runtime.ts` 是连续预览、
+  快速预览和 PDF 共用的媒体渲染、资源等待和 Paged.js 运行时。
+- `packages/preview-engine/src/continuous-preview.ts` 与
+  `incremental-pagination.ts` 分别负责无分页 DOM 更新和后缀分页缓存。
+- `packages/preview-engine/src/paged-preview.ts` 负责分页协议、共享文档
+  CSS、页眉页码和 Typora 代码围栏结构兼容。
+- Mermaid、ECharts、图片适配、媒体回填及跨页表格实现均位于
+  `packages/preview-engine/src/`，不得在 Web 或 Desktop 复制第二套。
 - `apps/web/src/PrecisePdfPreview.tsx` 和 `pdf-render-queue.ts` 负责 PDF.js 精确预览和 Canvas 生命周期。
+- `apps/web/src/document-link.ts` 与 `pdf-annotation-links.ts` 负责 Web
+  链接动作和精确 PDF 注释层适配。
 - `apps/web/src/PreviewPageControl.tsx` 和 `preview-page.ts` 负责当前页输入、
  页码边界、滚动页识别和快速跳转。
 - `apps/web/src/preview-zoom.ts` 和 `PreviewZoomControl.tsx` 负责预览缩放缓存、边界和控制界面。
@@ -676,15 +908,17 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
 - `apps/server/src/app.ts` 是新增的可测试 Fastify 应用。
 - `packages/application` 负责共享 Markdown 渲染和主题应用服务；
  `apps/server` 与 `apps/desktop` 分别提供 HTTP 和 IPC 适配。
- `apps/desktop/src/main.ts` 负责 Electron 生命周期、自定义应用协议、
-  应用窗口、IPC 校验和原生 PDF 保存。
+- `apps/desktop/src/desktop-application-controller.ts` 负责 Electron
+  多窗口、同文件单例、文件变化检测和平台链接动作；`main.ts` 负责启动
+  组装、协议和生命周期。
+- `apps/desktop/src/desktop-document-link.ts` 负责本地链接解析和
+  Markdown 目标识别。
 - `apps/desktop/src/electron-pdf-generator.ts` 负责隐藏 PDF 窗口、分页
  调度、网络限制、打印和窗口复用。
 - `apps/desktop/src/app-preload.ts` 与 `pdf-preload.ts` 分别定义应用
  窗口和 PDF 运行窗口的最小 IPC 能力。
- `.local/themes/typora-*` 仍可作为用户本机副本；v0.4.0 的三套发布版本
-  已复制到 `themes/` 并标记为内置主题。
- `.local/theme-backups` 中保留 GitHub、Pixyll 和 Whitey 的可恢复备份；Newsprint 和 Night 的当前副本及备份已按用户要求删除。
+- `.local/themes/` 只用于外挂自定义主题；四套发布主题已经内置，无需
+  重复挂载。历史副本保存在 `.local/theme-backups`，均被 Git 忽略。
 - Typora 复制主题按公司内部私有项目决策内置，不面向外部公开或商用；
  未来改变分发范围前必须重新完成许可证审查。
 - 快速预览会受到客户端 Windows 显示缩放、浏览器缩放和设备像素比影响；
@@ -693,12 +927,21 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
  目录读取；远程图片仅保留有界内存缓存。
 - 桌面端已通过进程内共享服务实现离线 Markdown 渲染、主题读取和 PDF
  导出，不依赖 Fastify 或本地 HTTP Server。
- v0.4.0 AIO 容器已经通过 Docker Desktop 构建、端到端和浏览器验证，
-  当前 Compose 容器保持运行。
+- `v0.5.0` AIO 正式镜像已经通过 Docker Desktop 构建、PDF 冒烟和
+  Compose 健康检查，当前 Compose 容器保持运行。
+- Desktop `package` 和 `make` 必须经过 `build:embedded-web`；禁止直接
+  调用 electron-builder 复制未经本轮编译的 `apps/web/dist`。

 ## 6. 推荐接手顺序

-### 阶段一：导出配置扩展
+### 阶段一：v0.5.x 稳定性与性能观测
+
+- 为增量分页补充超长文档性能基线，记录稳定前缀页数和后缀重算耗时；
+- 覆盖 Windows 100%、125% 和 150% 显示缩放的快速/精确分页差异；
+- 扩展 Desktop 多窗口、文件外部变化和链接打开的真实端到端回归；
+- 持续检查连续预览中媒体宽高、单滚动容器和资源释放。
+
+### 阶段二：导出配置扩展

 - Front Matter 元数据覆盖；
 - 浏览器本地配置预设；
@@ -1,12 +1,12 @@
 {
  "name": "md-to-pdf",
-  "version": "0.4.3",
+  "version": "0.5.1",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "md-to-pdf",
-      "version": "0.4.3",
+      "version": "0.5.1",
      "workspaces": [
        "apps/*",
        "packages/*"
@@ -21,7 +21,7 @@
    },
    "apps/desktop": {
      "name": "@md-to-pdf/desktop",
-      "version": "0.4.3",
+      "version": "0.5.1",
      "devDependencies": {
        "@md-to-pdf/application": "0.4.1",
        "@types/node": "^24.10.1",
@@ -539,11 +539,9 @@
      "dependencies": {
        "@md-to-pdf/core": "0.1.0",
        "@md-to-pdf/markdown-echarts": "0.1.0",
-        "@mermaid-js/layout-elk": "0.2.2",
+        "@md-to-pdf/preview-engine": "0.1.0",
        "highlight.js": "^11.11.1",
        "katex": "^0.16.28",
-        "mermaid": "11.16.0",
-        "pagedjs": "^0.4.3",
        "pdfjs-dist": "6.1.200",
        "react": "^19.2.0",
        "react-dom": "^19.2.0"
@@ -1956,6 +1954,10 @@
      "resolved": "packages/markdown-echarts",
      "link": true
    },
+    "node_modules/@md-to-pdf/preview-engine": {
+      "resolved": "packages/preview-engine",
+      "link": true
+    },
    "node_modules/@md-to-pdf/renderer": {
      "resolved": "packages/renderer",
      "link": true
@@ -3486,7 +3488,6 @@
      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.20.0.tgz",
      "integrity": "sha512-Thbli+OlOj+iMPYFBVBfJ3OmCAnaSyNn4M1vz9T6Gka5Jt9ba/HIR56joy65tY6kx/FCF5VXNB819Y7/GUrBGA==",
      "license": "MIT",
-      "peer": true,
      "dependencies": {
        "fast-deep-equal": "^3.1.3",
        "fast-uri": "^3.0.1",
@@ -5296,6 +5297,7 @@
      "integrity": "sha512-O3zJUFUYHJKgzPqioHxfxzBzlSC1eXCSr79gMSBKBP5AgjjpmrydMsMLotEg9fAJF36vdUncb+4ndRNxoPdlSQ==",
      "dev": true,
      "license": "MIT",
+      "peer": true,
      "dependencies": {
        "app-builder-lib": "26.15.3",
        "builder-util": "26.15.3",
@@ -5505,7 +5507,6 @@
      "version": "6.1.0",
      "resolved": "https://registry.npmjs.org/echarts/-/echarts-6.1.0.tgz",
      "integrity": "sha512-q0yaFPggC9FUdsWH4blavRWFmxdrIodbkoKNAjJudAI6CA9gNPxHtV2RcZNEepZVlk4yvBYkOkbk6HIVpIyHZA==",
-      "dev": true,
      "license": "Apache-2.0",
      "dependencies": {
        "tslib": "2.3.0",
@@ -5516,7 +5517,6 @@
      "version": "2.3.0",
      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.3.0.tgz",
      "integrity": "sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg==",
-      "dev": true,
      "license": "0BSD"
    },
    "node_modules/ejs": {
@@ -9558,7 +9558,6 @@
      "version": "6.1.0",
      "resolved": "https://registry.npmjs.org/zrender/-/zrender-6.1.0.tgz",
      "integrity": "sha512-oEGMDB6pOP2S6OwRR4PdVv610zrjnA3Bh+JnSG12fYJlBKjtNAoEb5fSUoCOOINlH96I2fU38/A2UpRKs67xYQ==",
-      "dev": true,
      "license": "BSD-3-Clause",
      "dependencies": {
        "tslib": "2.3.0"
@@ -9568,7 +9567,6 @@
      "version": "2.3.0",
      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.3.0.tgz",
      "integrity": "sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg==",
-      "dev": true,
      "license": "0BSD"
    },
    "packages/application": {
@@ -9612,6 +9610,22 @@
        "markdown-it": "^14.3.0"
      }
    },
+    "packages/preview-engine": {
+      "name": "@md-to-pdf/preview-engine",
+      "version": "0.1.0",
+      "dependencies": {
+        "@md-to-pdf/core": "0.1.0",
+        "@md-to-pdf/markdown-echarts": "0.1.0",
+        "@mermaid-js/layout-elk": "0.2.2",
+        "echarts": "6.1.0",
+        "mermaid": "11.16.0",
+        "pagedjs": "^0.4.3"
+      },
+      "devDependencies": {
+        "happy-dom": "^20.11.1",
+        "vitest": "^4.1.10"
+      }
+    },
    "packages/renderer": {
      "name": "@md-to-pdf/renderer",
      "version": "0.1.0",
@@ -1,6 +1,6 @@
 {
  "name": "md-to-pdf",
-  "version": "0.4.3",
+  "version": "0.5.1",
  "private": true,
  "description": "可配置、可主题化的 Markdown PDF 导出工具",
  "workspaces": [
@@ -8,20 +8,22 @@
    "packages/*"
  ],
  "scripts": {
-    "build": "npm run build -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/core && npm run build -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/web && npm run build -w @md-to-pdf/server && npm run build -w @md-to-pdf/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/renderer && npm run build -w @md-to-pdf/application && concurrently -k -n markdown-echarts,core,renderer,application,server,web \"npm:dev:markdown-echarts\" \"npm:dev:core\" \"npm:dev:renderer\" \"npm:dev:application\" \"npm:dev:server\" \"npm:dev:web\"",
+    "build": "npm run build:web-runtime && 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/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/renderer && npm run build -w @md-to-pdf/application && npm run build -w @md-to-pdf/preview-engine && concurrently -k -n markdown-echarts,core,renderer,application,preview-engine,server,web \"npm:dev:markdown-echarts\" \"npm:dev:core\" \"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:renderer": "npm run dev -w @md-to-pdf/renderer",
    "dev:application": "npm run dev -w @md-to-pdf/application",
+    "dev:preview-engine": "npm run dev -w @md-to-pdf/preview-engine",
    "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/renderer && npm run build -w @md-to-pdf/application && concurrently -k -n web,desktop \"npm:dev:web\" \"npm:dev:desktop\"",
-    "desktop:package": "npm run build -w @md-to-pdf/web && npm run package -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/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:package": "npm run package -w @md-to-pdf/desktop",
    "theme:import-typora": "node scripts/import-typora-theme.mjs",
-    "test": "npm run test -w @md-to-pdf/markdown-echarts && npm run test -w @md-to-pdf/core && npm run test -w @md-to-pdf/renderer && npm run test -w @md-to-pdf/application && npm run build -w @md-to-pdf/application && npm run test -w @md-to-pdf/web && npm run test -w @md-to-pdf/server && npm run test -w @md-to-pdf/desktop",
-    "typecheck": "npm run typecheck -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/markdown-echarts && npm run typecheck -w @md-to-pdf/core && npm run build -w @md-to-pdf/core && npm run typecheck -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/renderer && npm run typecheck -w @md-to-pdf/application && npm run build -w @md-to-pdf/application && npm run typecheck -w @md-to-pdf/web && npm run typecheck -w @md-to-pdf/server && npm run typecheck -w @md-to-pdf/desktop"
+    "test": "npm run test -w @md-to-pdf/markdown-echarts && npm run test -w @md-to-pdf/core && npm run test -w @md-to-pdf/renderer && npm run test -w @md-to-pdf/application && npm run build -w @md-to-pdf/application && npm run test -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/preview-engine && npm run test -w @md-to-pdf/web && npm run test -w @md-to-pdf/server && npm run test -w @md-to-pdf/desktop",
+    "typecheck": "npm run typecheck -w @md-to-pdf/markdown-echarts && npm run build -w @md-to-pdf/markdown-echarts && npm run typecheck -w @md-to-pdf/core && npm run build -w @md-to-pdf/core && npm run typecheck -w @md-to-pdf/renderer && npm run build -w @md-to-pdf/renderer && npm run typecheck -w @md-to-pdf/application && npm run build -w @md-to-pdf/application && npm run typecheck -w @md-to-pdf/preview-engine && npm run build -w @md-to-pdf/preview-engine && npm run typecheck -w @md-to-pdf/web && npm run typecheck -w @md-to-pdf/server && npm run typecheck -w @md-to-pdf/desktop"
  },
  "engines": {
    "node": ">=22"
@@ -0,0 +1,51 @@
+# @md-to-pdf/application
+
+Web Server 与 Electron Desktop 共用的应用服务层，组合
+`@md-to-pdf/core` 和 `@md-to-pdf/renderer`，统一处理 Markdown 渲染、
+主题发现、主题资源和图片资源。Fastify 与 Electron IPC 只负责传输和
+平台能力适配。
+
+## 目录结构
+
+```text
+src/
+  application-service.ts  渲染、主题和资源用例入口
+  image-resources.ts      本地、Base64 与受限远程图片处理
+  theme-registry.ts       内置及自定义主题扫描、校验与缓存
+  index.ts                公共导出入口
+tests/
+  application-service.test.ts
+  bundled-themes.test.ts
+  image-resources.test.ts
+```
+
+## 使用
+
+```ts
+import { createApplicationService } from "@md-to-pdf/application";
+
+const service = createApplicationService({
+  bundledRoot,
+  localRoot
+});
+
+const themes = await service.listThemes();
+const document = await service.render(request);
+```
+
+Web 端通过 `apps/server` 的 HTTP API 调用；桌面端在主进程中创建同一
+服务，并通过受限 IPC 暴露给渲染进程。Web 默认不接收本地素材目录，
+Desktop 才会以 Markdown 所在目录为边界解析相对资源。
+
+内置主题来自仓库 `themes/`，当前名称为 Typora Github、
+Typora Pixyll、Typora whitey 和 Typora Clean。额外主题从平台传入的
+本地主题根目录扫描；与内置主题 ID 冲突时以内置主题为准。
+
+## 开发与验证
+
+```powershell
+npm run dev -w @md-to-pdf/application
+npm run test -w @md-to-pdf/application
+npm run typecheck -w @md-to-pdf/application
+npm run build -w @md-to-pdf/application
+```
@@ -104,6 +104,9 @@ export function createApplicationService(
        name: manifest.name,
        version: manifest.version,
        description: manifest.description,
+        category: manifest.category,
+        compatibleProfiles: manifest.compatibleProfiles,
+        pageDefaults: manifest.pageDefaults,
        bundled: manifest.bundled,
        source
      }))
@@ -2,6 +2,7 @@ import { lookup } from "node:dns/promises";
 import { readFile, realpath, stat } from "node:fs/promises";
 import { isIP } from "node:net";
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { extractMarkdownImageSources } from "@md-to-pdf/renderer";

 export const MAXIMUM_IMAGE_COUNT = 50;
@@ -22,6 +23,7 @@ export interface MarkdownImageResource {

 export interface ImageResolutionContext {
  localRoot?: string;
+  allowUnrestrictedLocalFiles?: boolean;
 }

 export interface ResolvedMarkdownImages {
@@ -313,6 +315,46 @@ async function loadLocalImage(root: string, source: string) {
  };
 }

+function decodeUnrestrictedLocalPath(source: string) {
+  if (/^file:/iu.test(source)) {
+    try {
+      return fileURLToPath(new URL(source));
+    } catch {
+      throw new Error("file: 图片路径格式无效");
+    }
+  }
+  const pathOnly = source.split(/[?#]/u, 1)[0] ?? "";
+  try {
+    return decodeURIComponent(pathOnly);
+  } catch {
+    throw new Error("图片路径 URL 编码无效");
+  }
+}
+
+async function loadUnrestrictedLocalImage(
+  root: string,
+  source: string
+) {
+  const decoded = decodeUnrestrictedLocalPath(source);
+  const target =
+    path.isAbsolute(decoded) || /^[a-z]:[\\/]/iu.test(decoded)
+      ? path.normalize(decoded)
+      : path.resolve(root, decoded);
+  const realTarget = await realpath(target);
+  const targetStat = await stat(realTarget);
+  if (!targetStat.isFile()) {
+    throw new Error("图片资源不是文件");
+  }
+  if (targetStat.size > MAXIMUM_IMAGE_BYTES) {
+    throw new Error("本地图片超过单文件大小限制");
+  }
+  const content = await readFile(realTarget);
+  return {
+    content,
+    contentType: detectImageContentType(content)
+  };
+}
+
 function parseUploadedResources(value: unknown) {
  if (value === undefined) {
    return new Map<string, LoadedImage>();
@@ -413,12 +455,26 @@ export function createImageResourceResolver(
        if (/^https?:\/\//iu.test(source)) {
          image = await loadRemote(source);
        } else {
-          const normalized = normalizeDocumentAssetPath(source);
-          const uploadedImage = uploaded.get(normalized);
+          let normalized: string | undefined;
+          try {
+            normalized = normalizeDocumentAssetPath(source);
+          } catch (error) {
+            if (!context.allowUnrestrictedLocalFiles) {
+              throw error;
+            }
+          }
+          const uploadedImage = normalized
+            ? uploaded.get(normalized)
+            : undefined;
          if (uploadedImage) {
            image = uploadedImage;
          } else if (context.localRoot) {
-            image = await loadLocalImage(context.localRoot, source);
+            image = context.allowUnrestrictedLocalFiles
+              ? await loadUnrestrictedLocalImage(
+                  context.localRoot,
+                  source
+                )
+              : await loadLocalImage(context.localRoot, source);
          } else {
            throw new Error("未提供对应素材目录");
          }
@@ -46,6 +46,8 @@ const assetContentTypes: Record<string, string> = {
 const cssImportPattern =
  /@import\s+(?:url\(\s*(?:\"([^\"]+)\"|'([^']+)'|([^'\"\s)]+))\s*\)|\"([^\"]+)\"|'([^']+)')\s*;/gi;
 const maximumCssImportDepth = 8;
+const sharedThemeAssetId = "_shared";
+const sharedThemeAssetScheme = "theme-shared:";

 function isMissingFileError(error: unknown) {
  return (
@@ -110,7 +112,7 @@ async function readThemeRoot(

  const records: ThemeRecord[] = [];
  for (const entry of entries) {
-    if (!entry.isDirectory()) {
+    if (!entry.isDirectory() || entry.name.startsWith("_")) {
      continue;
    }

@@ -165,7 +167,8 @@ function prepareCssSegment(
  css: string,
  themeId: string,
  cssDirectory: string,
-  createAssetUrl: (themeId: string, assetPath: string) => string
+  createAssetUrl: (themeId: string, assetPath: string) => string,
+  allowSharedAssets: boolean
 ) {
  return css.replace(
    /url\(\s*(['"]?)([^'")]+)\1\s*\)/gi,
@@ -174,6 +177,18 @@ function prepareCssSegment(
      if (value.startsWith("data:") || value.startsWith("#")) {
        return match;
      }
+      if (value.startsWith(sharedThemeAssetScheme)) {
+        if (!allowSharedAssets) {
+          throw new Error("本地主题不能引用内置共享资源");
+        }
+        const sharedPath = normalizeCssPath(
+          value.slice(sharedThemeAssetScheme.length)
+        );
+        if (!sharedPath || sharedPath === ".") {
+          throw new Error("内置共享资源路径不能为空");
+        }
+        return `url("${createAssetUrl(sharedThemeAssetId, sharedPath)}")`;
+      }
      if (
        value.startsWith("/") ||
        value.startsWith("//") ||
@@ -250,7 +265,8 @@ async function loadThemeCssFile(
      css.slice(previousEnd, matchStart),
      theme.manifest.id,
      cssDirectory,
-      createAssetUrl
+      createAssetUrl,
+      theme.source === "bundled"
    );

    const importedPath = readImportedPath(match);
@@ -273,7 +289,8 @@ async function loadThemeCssFile(
    remainder,
    theme.manifest.id,
    cssDirectory,
-    createAssetUrl
+    createAssetUrl,
+    theme.source === "bundled"
  );
  if (/@import\b/i.test(result)) {
    throw new Error("主题包含不支持的 CSS @import 语法");
@@ -378,6 +395,20 @@ export function createThemeRegistry(options: ThemeRegistryOptions) {
  }

  async function getAsset(themeId: string, assetPath: string) {
+    if (themeId === sharedThemeAssetId) {
+      const extension = extname(assetPath).toLowerCase();
+      const contentType = assetContentTypes[extension];
+      if (!contentType) {
+        throw new Error("不支持的主题资源类型");
+      }
+      const sharedRoot = resolve(options.bundledRoot, sharedThemeAssetId);
+      const path = await resolveThemeFile(sharedRoot, assetPath);
+      return {
+        contentType,
+        content: await readFile(path)
+      };
+    }
+
    const theme = await get(themeId);
    if (!theme) {
      return undefined;
@@ -37,7 +37,13 @@ async function createThemeFixture() {
  const bundledRoot = join(temporaryDirectory, "bundled");
  const localRoot = join(temporaryDirectory, "local");
  const themeRoot = join(bundledRoot, "test-theme");
+  const sharedFontRoot = join(
+    bundledRoot,
+    "_shared",
+    "official-fonts"
+  );
  await mkdir(join(themeRoot, "fonts"), { recursive: true });
+  await mkdir(sharedFontRoot, { recursive: true });
  await mkdir(localRoot, { recursive: true });
  await writeFile(
    join(themeRoot, "theme.json"),
@@ -53,6 +59,14 @@ async function createThemeFixture() {
      domPreset: "typora",
      defaultFontSize: "16px",
      supportedFeatures: ["code", "table"],
+      pageDefaults: {
+        margins: {
+          top: "37mm",
+          right: "26mm",
+          bottom: "35mm",
+          left: "28mm"
+        }
+      },
      bundled: true
    }),
    "utf8"
@@ -64,6 +78,10 @@ async function createThemeFixture() {
      "  font-family: Test;",
      "  src: url('./fonts/test.woff2') format('woff2');",
      "}",
+      "@font-face {",
+      "  font-family: SharedTest;",
+      "  src: url('theme-shared:official-fonts/shared.woff2') format('woff2');",
+      "}",
      "#write { font-family: Test; }"
    ].join("\n"),
    "utf8"
@@ -72,6 +90,10 @@ async function createThemeFixture() {
    join(themeRoot, "fonts", "test.woff2"),
    Buffer.from([0, 1, 2, 3])
  );
+  await writeFile(
+    join(sharedFontRoot, "shared.woff2"),
+    Buffer.from([4, 5, 6, 7])
+  );
  return { bundledRoot, localRoot };
 }

@@ -147,6 +169,16 @@ describe("共享应用服务", () => {
      themes: [
        expect.objectContaining({
          id: "test-theme",
+          category: "general",
+          compatibleProfiles: [],
+          pageDefaults: {
+            margins: {
+              top: "37mm",
+              right: "26mm",
+              bottom: "35mm",
+              left: "28mm"
+            }
+          },
          bundled: true,
          source: "bundled"
        })
@@ -157,6 +189,11 @@ describe("共享应用服务", () => {
    ).resolves.toContain(
      "mdpdf://theme/test-theme/fonts/test.woff2"
    );
+    await expect(
+      service.getThemeCss("test-theme")
+    ).resolves.toContain(
+      "mdpdf://theme/_shared/official-fonts/shared.woff2"
+    );
  });

  it("安全读取主题二进制资源", async () => {
@@ -172,6 +209,18 @@ describe("共享应用服务", () => {
    await expect(
      service.getThemeAsset("test-theme", "../test.woff2")
    ).rejects.toThrow("主题资源路径不安全");
+    await expect(
+      service.getThemeAsset(
+        "_shared",
+        "official-fonts/shared.woff2"
+      )
+    ).resolves.toEqual({
+      contentType: "font/woff2",
+      content: Buffer.from([4, 5, 6, 7])
+    });
+    await expect(
+      service.getThemeAsset("_shared", "../shared.woff2")
+    ).rejects.toThrow("主题资源路径不安全");
  });

  it("内置主题优先于同 ID 的旧本地副本", async () => {
@@ -0,0 +1,256 @@
+import { readFile, readdir } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+import { describe, expect, it } from "vitest";
+
+const bundledThemeNames = {
+  "typora-github": "Typora Github",
+  "typora-pixyll": "Typora Pixyll",
+  "typora-whitey": "Typora whitey",
+  "typora-like": "Typora Clean",
+  "gov-red-standard": "政企红头·标准文件",
+  "gov-red-letter": "政企红头·标准信函",
+  "enterprise-red-simple": "政企红头·企业简版",
+  "red-briefing": "政企红头·纪要简报",
+  "formal-report": "政企正式·工作报告",
+  "formal-regulation": "政企正式·规章制度",
+  "formal-feasibility": "政企正式·可研报告",
+  "tender-classic": "标书正式·经典黑白",
+  "tender-business-blue": "标书正式·商务蓝",
+  "tender-blind": "标书正式·技术暗标"
+} as const;
+
+describe("内置主题清单", () => {
+  it("每个内置主题都有同名 Markdown 示例", async () => {
+    const samplesRoot = fileURLToPath(
+      new URL("../../../samples/themes/", import.meta.url)
+    );
+    const sampleFiles = (await readdir(samplesRoot))
+      .filter((fileName) => fileName.endsWith(".md"))
+      .sort();
+    const expectedFiles = Object.keys(bundledThemeNames)
+      .map((id) => `${id}.md`)
+      .sort();
+
+    expect(sampleFiles).toEqual(expectedFiles);
+    expect(sampleFiles).not.toContain("_shared.md");
+    for (const fileName of sampleFiles) {
+      const markdown = await readFile(
+        `${samplesRoot}${fileName}`,
+        "utf8"
+      );
+      expect(markdown.length).toBeGreaterThan(300);
+      expect(markdown).toMatch(/^---[\s\S]+---/u);
+    }
+  });
+
+  it("提供可随桌面发行包分发的内置教程", async () => {
+    const tutorialsRoot = fileURLToPath(
+      new URL("../../../samples/tutorials/", import.meta.url)
+    );
+    const tutorialFiles = (await readdir(tutorialsRoot))
+      .filter((fileName) => fileName.endsWith(".md"))
+      .sort();
+
+    expect(tutorialFiles).toEqual([
+      "echarts-tutorial.md",
+      "formal-document-tutorial.md"
+    ]);
+    for (const fileName of tutorialFiles) {
+      const markdown = await readFile(
+        `${tutorialsRoot}${fileName}`,
+        "utf8"
+      );
+      expect(markdown.startsWith("---")).toBe(true);
+      expect(markdown.length).toBeGreaterThan(1_000);
+    }
+  });
+
+  it("使用稳定主题 ID 和面向用户的显示名称", async () => {
+    const themesRoot = fileURLToPath(
+      new URL("../../../themes/", import.meta.url)
+    );
+
+    for (const [id, name] of Object.entries(bundledThemeNames)) {
+      const manifest = JSON.parse(
+        await readFile(
+          `${themesRoot}${id}/theme.json`,
+          "utf8"
+        )
+      ) as { id?: unknown; name?: unknown };
+
+      expect(manifest.id).toBe(id);
+      expect(manifest.name).toBe(name);
+    }
+  });
+
+  it("为红头主题声明分类与兼容的结构化文档", async () => {
+    const themesRoot = fileURLToPath(
+      new URL("../../../themes/", import.meta.url)
+    );
+    const expectedProfiles = {
+      "gov-red-standard": "official",
+      "gov-red-letter": "official",
+      "enterprise-red-simple": "official",
+      "red-briefing": "briefing"
+    } as const;
+
+    for (const [id, profile] of Object.entries(expectedProfiles)) {
+      const manifest = JSON.parse(
+        await readFile(`${themesRoot}${id}/theme.json`, "utf8")
+      ) as {
+        category?: unknown;
+        compatibleProfiles?: unknown;
+      };
+
+      expect(manifest.category).toBe("red-letter");
+      expect(manifest.compatibleProfiles).toContain(profile);
+    }
+  });
+
+  it("标准信函主题提供首页版头和末页底部红色双线", async () => {
+    const [themeCss, printCss] = await Promise.all([
+      readFile(
+        new URL(
+          "../../../themes/gov-red-letter/theme.css",
+          import.meta.url
+        ),
+        "utf8"
+      ),
+      readFile(
+        new URL(
+          "../../../themes/gov-red-letter/print.css",
+          import.meta.url
+        ),
+        "utf8"
+      )
+    ]);
+
+    expect(themeCss).toContain(".doc-masthead-official::after");
+    expect(printCss).toContain(
+      ".pagedjs_pages > .pagedjs_page:last-child .pagedjs_pagebox::after"
+    );
+    expect(printCss).toContain("bottom: 20mm");
+  });
+
+  it("为正式文档与标书主题声明正确分类", async () => {
+    const themesRoot = fileURLToPath(
+      new URL("../../../themes/", import.meta.url)
+    );
+    const expectedThemes = {
+      "formal-report": {
+        category: "formal",
+        profile: undefined
+      },
+      "formal-regulation": {
+        category: "formal",
+        profile: undefined
+      },
+      "formal-feasibility": {
+        category: "formal",
+        profile: "project-report"
+      },
+      "tender-classic": {
+        category: "tender",
+        profile: "tender"
+      },
+      "tender-business-blue": {
+        category: "tender",
+        profile: "tender"
+      },
+      "tender-blind": {
+        category: "tender",
+        profile: "tender"
+      }
+    } as const;
+
+    for (const [id, expected] of Object.entries(expectedThemes)) {
+      const manifest = JSON.parse(
+        await readFile(`${themesRoot}${id}/theme.json`, "utf8")
+      ) as {
+        category?: unknown;
+        compatibleProfiles?: unknown[];
+      };
+
+      expect(manifest.category).toBe(expected.category);
+      if (expected.profile) {
+        expect(manifest.compatibleProfiles).toContain(
+          expected.profile
+        );
+      } else {
+        expect(manifest.compatibleProfiles).toEqual([]);
+      }
+    }
+  });
+
+  it("技术暗标主题隐藏结构化身份字段", async () => {
+    const css = await readFile(
+      new URL(
+        "../../../themes/tender-blind/theme.css",
+        import.meta.url
+      ),
+      "utf8"
+    );
+
+    expect(css).toMatch(
+      /\.doc-cover-bidder,[\s\S]*\.doc-cover-representative\s*\{[\s\S]*display:\s*none\s*!important;/u
+    );
+  });
+
+  it("正式主题声明符合用途的推荐页边距", async () => {
+    const themesRoot = fileURLToPath(
+      new URL("../../../themes/", import.meta.url)
+    );
+    const expectedMargins = {
+      "gov-red-standard": ["37mm", "26mm", "35mm", "28mm"],
+      "gov-red-letter": ["37mm", "26mm", "35mm", "28mm"],
+      "enterprise-red-simple": ["25mm", "25mm", "25mm", "28mm"],
+      "red-briefing": ["25mm", "25mm", "25mm", "25mm"],
+      "formal-report": ["37mm", "26mm", "35mm", "28mm"],
+      "formal-regulation": ["37mm", "26mm", "35mm", "28mm"],
+      "formal-feasibility": ["25mm", "20mm", "25mm", "30mm"],
+      "tender-classic": ["25mm", "25mm", "25mm", "30mm"],
+      "tender-business-blue": ["25mm", "25mm", "25mm", "30mm"],
+      "tender-blind": ["25.4mm", "25.4mm", "25.4mm", "31.7mm"]
+    } as const;
+
+    for (const [id, expected] of Object.entries(expectedMargins)) {
+      const manifest = JSON.parse(
+        await readFile(`${themesRoot}${id}/theme.json`, "utf8")
+      ) as {
+        pageDefaults?: {
+          margins?: Record<"top" | "right" | "bottom" | "left", string>;
+        };
+      };
+      const margins = manifest.pageDefaults?.margins;
+
+      expect([
+        margins?.top,
+        margins?.right,
+        margins?.bottom,
+        margins?.left
+      ]).toEqual(expected);
+    }
+  });
+
+  it("红头机关名称不继承正文首行缩进", async () => {
+    const themesRoot = fileURLToPath(
+      new URL("../../../themes/", import.meta.url)
+    );
+
+    for (const id of [
+      "gov-red-standard",
+      "gov-red-letter",
+      "enterprise-red-simple"
+    ]) {
+      const css = await readFile(
+        `${themesRoot}${id}/theme.css`,
+        "utf8"
+      );
+
+      expect(css).toMatch(
+        /#write \.doc-issuer\s*\{[^}]*text-align:\s*center;[^}]*text-indent:\s*0;/su
+      );
+    }
+  });
+
+});
@@ -1,3 +1,7 @@
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { pathToFileURL } from "node:url";
 import { describe, expect, it, vi } from "vitest";
 import {
  createImageResourceResolver,
@@ -59,4 +63,41 @@ describe("Markdown 图片资源安全", () => {
    );
    expect(failed.warnings[0]).toContain("网络不可用");
  });
+
+  it("仅在显式授权时允许桌面读取上级、绝对及 file URI 图片", async () => {
+    const directory = await mkdtemp(
+      path.join(os.tmpdir(), "md-to-pdf-local-images-")
+    );
+    const documentRoot = path.join(directory, "docs");
+    const imagePath = path.join(directory, "共享图片.png");
+    try {
+      await writeFile(imagePath, png);
+      const resolve = createImageResourceResolver();
+      const sources = [
+        "../共享图片.png",
+        imagePath,
+        pathToFileURL(imagePath).href
+      ];
+      const markdown = sources
+        .map((source) => `![图](${source.replace(/ /gu, "%20")})`)
+        .join("\n");
+
+      const restricted = await resolve(markdown, undefined, {
+        localRoot: documentRoot
+      });
+      expect(restricted.warnings).toHaveLength(3);
+
+      const unrestricted = await resolve(markdown, undefined, {
+        localRoot: documentRoot,
+        allowUnrestrictedLocalFiles: true
+      });
+      expect(unrestricted.warnings).toEqual([]);
+      expect(unrestricted.sources).toHaveLength(3);
+      for (const dataUrl of unrestricted.sources.values()) {
+        expect(dataUrl).toMatch(/^data:image\/png;base64,/u);
+      }
+    } finally {
+      await rm(directory, { recursive: true, force: true });
+    }
+  });
 });
@@ -0,0 +1,56 @@
+# @md-to-pdf/core
+
+跨 Web、Server、Desktop 和渲染器共享的纯数据模型与校验规则。该包不
+依赖浏览器、Electron 或 Fastify，负责保证各运行端使用同一份协议。
+
+## 目录结构
+
+```text
+src/
+  document.ts       Markdown 文档、分页载荷、结果与耗时模型
+  document-link.ts  跨端链接分类与 PDF 本地链接编码协议
+  export-config.ts  纸张、边距、页眉页脚、页码与图表配置
+  theme.ts          主题清单、主题能力与 CSS 载荷模型
+  index.ts          公共导出入口
+tests/
+  document.test.ts
+  document-link.test.ts
+  export-config.test.ts
+```
+
+## 使用
+
+```ts
+import {
+  classifyDocumentLink,
+  createPagedDocumentPayload,
+  defaultExportConfig,
+  exportConfigSchema
+} from "@md-to-pdf/core";
+
+const link = classifyDocumentLink("../docs/example.md");
+const config = exportConfigSchema.parse(defaultExportConfig);
+const payload = createPagedDocumentPayload({
+  document,
+  fileName: "example.md",
+  themeCss,
+  exportConfig: config
+});
+```
+
+`classifyDocumentLink()` 只负责稳定分类，不执行平台动作。Web 根据分类
+处理锚点和网络链接；Desktop 决定是否调用浏览器、系统程序或打开新的
+Markdown 窗口。精确 PDF 使用保留的 `.invalid` 地址暂存本地链接，
+PDF.js 注释层展示时再安全解码，避免 Chromium 将相对路径误转成站点 URL。
+
+新增跨端字段时，应先在这里定义类型、默认值、Zod 校验和兼容迁移，再由
+各适配层消费，避免 Web 与 Desktop 分别维护协议。
+
+## 开发与验证
+
+```powershell
+npm run dev -w @md-to-pdf/core
+npm run test -w @md-to-pdf/core
+npm run typecheck -w @md-to-pdf/core
+npm run build -w @md-to-pdf/core
+```
@@ -0,0 +1,123 @@
+export type DocumentLinkKind =
+  | "anchor"
+  | "network"
+  | "protocol"
+  | "local"
+  | "unsafe"
+  | "invalid";
+
+export interface ClassifiedDocumentLink {
+  kind: DocumentLinkKind;
+  href: string;
+  normalizedHref: string;
+  scheme?: string;
+}
+
+const schemePattern = /^([a-z][a-z\d+.-]*):/iu;
+const windowsAbsolutePathPattern = /^[a-z]:[\\/]/iu;
+const windowsUncPathPattern = /^\\\\[^\\]/u;
+const unsafeSchemePattern = /^(?:data|javascript|vbscript)$/u;
+const controlCharacterPattern = /[\u0000-\u001f\u007f]/u;
+const pdfLocalLinkOrigin = "https://mdpdf.local.invalid";
+const pdfLocalLinkPath = "/document-link";
+
+function result(
+  kind: DocumentLinkKind,
+  href: string,
+  normalizedHref = href,
+  scheme?: string
+): ClassifiedDocumentLink {
+  return {
+    kind,
+    href,
+    normalizedHref,
+    ...(scheme ? { scheme } : {})
+  };
+}
+
+export function classifyDocumentLink(
+  rawHref: string
+): ClassifiedDocumentLink {
+  const href = rawHref.trim();
+  if (!href || controlCharacterPattern.test(href)) {
+    return result("invalid", href);
+  }
+
+  if (href.startsWith("#")) {
+    return result("anchor", href);
+  }
+
+  if (
+    windowsAbsolutePathPattern.test(href) ||
+    windowsUncPathPattern.test(href)
+  ) {
+    return result("local", href);
+  }
+
+  if (href.startsWith("//")) {
+    return result("network", href, `https:${href}`, "https");
+  }
+
+  const schemeMatch = schemePattern.exec(href);
+  if (!schemeMatch) {
+    return result("local", href);
+  }
+
+  const scheme = schemeMatch[1]?.toLowerCase() ?? "";
+  if (unsafeSchemePattern.test(scheme)) {
+    return result("unsafe", href, href, scheme);
+  }
+
+  if (scheme === "http" || scheme === "https") {
+    try {
+      const url = new URL(href);
+      if (!url.hostname) {
+        return result("invalid", href, href, scheme);
+      }
+      return result("network", href, href, scheme);
+    } catch {
+      return result("invalid", href, href, scheme);
+    }
+  }
+
+  if (scheme === "file") {
+    return result("local", href, href, scheme);
+  }
+
+  return result("protocol", href, href, scheme);
+}
+
+export function isSafeDocumentLink(rawHref: string) {
+  const { kind } = classifyDocumentLink(rawHref);
+  return kind !== "unsafe" && kind !== "invalid";
+}
+
+export function encodeLocalDocumentLinkForPdf(rawHref: string) {
+  const link = classifyDocumentLink(rawHref);
+  if (link.kind !== "local") {
+    return undefined;
+  }
+  const encoded = new URL(pdfLocalLinkPath, pdfLocalLinkOrigin);
+  encoded.searchParams.set("href", link.href);
+  return encoded.href;
+}
+
+export function decodeLocalDocumentLinkFromPdf(rawHref: string) {
+  let encoded: URL;
+  try {
+    encoded = new URL(rawHref);
+  } catch {
+    return undefined;
+  }
+  if (
+    encoded.origin !== pdfLocalLinkOrigin ||
+    encoded.pathname !== pdfLocalLinkPath
+  ) {
+    return undefined;
+  }
+  const href = encoded.searchParams.get("href");
+  if (!href || classifyDocumentLink(href).kind !== "local") {
+    return undefined;
+  }
+  return href;
+}
@@ -0,0 +1,99 @@
+import { z } from "zod";
+
+const scalarTextSchema = (maximumLength: number) =>
+  z.preprocess(
+    (value) => {
+      if (
+        typeof value === "string" ||
+        typeof value === "number" ||
+        typeof value === "boolean"
+      ) {
+        return String(value).trim();
+      }
+      return value;
+    },
+    z.string().min(1).max(maximumLength)
+  );
+
+const shortTextSchema = scalarTextSchema(120);
+const longTextSchema = scalarTextSchema(500);
+const textListSchema = z.preprocess(
+  (value) =>
+    typeof value === "string"
+      ? value
+          .split(/[，,]/u)
+          .map((item) => item.trim())
+          .filter(Boolean)
+      : value,
+  z.array(shortTextSchema).max(30)
+);
+
+export const documentProfileNameSchema = z.enum([
+  "official",
+  "briefing",
+  "project-report",
+  "tender"
+]);
+
+const officialDocumentProfileSchema = z
+  .object({
+    profile: z.literal("official"),
+    issuer: shortTextSchema.optional(),
+    number: shortTextSchema.optional(),
+    secrecy: shortTextSchema.optional(),
+    urgency: shortTextSchema.optional(),
+    signatory: shortTextSchema.optional(),
+    date: shortTextSchema.optional(),
+    copyTo: textListSchema.optional(),
+    printingOffice: shortTextSchema.optional()
+  })
+  .strict();
+
+const briefingDocumentProfileSchema = z
+  .object({
+    profile: z.literal("briefing"),
+    masthead: shortTextSchema.optional(),
+    issue: shortTextSchema.optional(),
+    publisher: shortTextSchema.optional(),
+    signatory: shortTextSchema.optional(),
+    date: shortTextSchema.optional(),
+    contact: longTextSchema.optional()
+  })
+  .strict();
+
+const projectReportDocumentProfileSchema = z
+  .object({
+    profile: z.literal("project-report"),
+    projectName: longTextSchema.optional(),
+    documentType: shortTextSchema.optional(),
+    owner: longTextSchema.optional(),
+    preparedBy: longTextSchema.optional(),
+    version: shortTextSchema.optional(),
+    date: shortTextSchema.optional()
+  })
+  .strict();
+
+const tenderDocumentProfileSchema = z
+  .object({
+    profile: z.literal("tender"),
+    copyMark: shortTextSchema.optional(),
+    projectName: longTextSchema.optional(),
+    projectNumber: shortTextSchema.optional(),
+    volume: shortTextSchema.optional(),
+    bidder: longTextSchema.optional(),
+    representative: shortTextSchema.optional(),
+    date: shortTextSchema.optional()
+  })
+  .strict();
+
+export const documentProfileSchema = z.discriminatedUnion("profile", [
+  officialDocumentProfileSchema,
+  briefingDocumentProfileSchema,
+  projectReportDocumentProfileSchema,
+  tenderDocumentProfileSchema
+]);
+
+export type DocumentProfileName = z.infer<
+  typeof documentProfileNameSchema
+>;
+export type DocumentProfile = z.infer<typeof documentProfileSchema>;
@@ -1,4 +1,5 @@
 import type { ExportConfig } from "./export-config.js";
+import type { DocumentProfile } from "./document-profile.js";
 import type { ThemeFeature } from "./theme.js";

 export interface MarkdownDocumentMetadata {
@@ -7,6 +8,7 @@ export interface MarkdownDocumentMetadata {
  subject: string;
  keywords: string[];
  language: string;
+  document?: DocumentProfile;
 }

 export interface RenderedMarkdownDocument {
@@ -1,6 +1,6 @@
 import { z } from "zod";

-export const EXPORT_CONFIG_VERSION = 3;
+export const EXPORT_CONFIG_VERSION = 4;
 export const CSS_PIXELS_PER_INCH = 96;
 export const PDF_POINTS_PER_INCH = 72;
 export const MILLIMETERS_PER_INCH = 25.4;
@@ -86,23 +86,39 @@ export function millimetersToPdfPoints(value: number) {
  return (value * PDF_POINTS_PER_INCH) / MILLIMETERS_PER_INCH;
 }

-const marginSchema = z.object({
+export const pageMarginsSchema = z.object({
  top: lengthSchema,
  right: lengthSchema,
  bottom: lengthSchema,
  left: lengthSchema
 });

-const headerSlotSchema = z.object({
+export const marginModeSchema = z.enum(["theme", "custom"]);
+export const pageDecorationsModeSchema = z.enum(["theme", "custom"]);
+
+export const headerSlotSchema = z.object({
  enabled: z.boolean(),
  content: z.string().max(500)
 });

-const headerSchema = z.object({
+const pageDecorationFontFamilySchema = z
+  .string()
+  .trim()
+  .min(1)
+  .max(300)
+  .regex(
+    /^[\p{L}\p{N}\s,"'-]+$/u,
+    "页眉页码字体只能包含字体名称、引号和逗号"
+  );
+
+export const headerSchema = z.object({
  enabled: z.boolean(),
  height: lengthSchema,
  showDivider: z.boolean(),
  fontSize: lengthSchema,
+  fontFamily: pageDecorationFontFamilySchema.default(
+    '"Segoe UI", "Microsoft YaHei", sans-serif'
+  ),
  color: z.string(),
  left: headerSlotSchema,
  center: headerSlotSchema,
@@ -114,26 +130,39 @@ export const pageNumberFormatSchema = z.enum([
  "page-total",
  "chinese-page-total",
  "dash-page",
+  "official-page",
  "custom"
 ]);

-const footerSchema = z.object({
+export const footerAlignmentSchema = z.enum([
+  "left",
+  "center",
+  "right",
+  "outer"
+]);
+
+export const footerSchema = z.object({
  enabled: z.boolean(),
  height: lengthSchema,
  showDivider: z.boolean(),
  fontSize: lengthSchema,
+  fontFamily: pageDecorationFontFamilySchema.default(
+    '"Segoe UI", "Microsoft YaHei", sans-serif'
+  ),
  color: z.string(),
-  alignment: z.enum(["left", "center", "right"]),
+  alignment: footerAlignmentSchema,
  format: pageNumberFormatSchema,
  template: z.string().max(500).optional(),
-  startFrom: z.number().int().positive()
+  startFrom: z.number().int().positive(),
+  showOnFirstPage: z.boolean().default(true)
 });

 const paperSchema = z
  .object({
    format: z.enum(supportedPaperFormats),
    orientation: z.enum(["portrait", "landscape"]),
-    margins: marginSchema
+    marginMode: marginModeSchema,
+    margins: pageMarginsSchema
  })
  .superRefine((paper, context) => {
    const sourceDimensions = paperDimensionsMm[paper.format];
@@ -178,6 +207,7 @@ export const exportConfigSchema = z.object({
  version: z.literal(EXPORT_CONFIG_VERSION),
  name: z.string().min(1).max(100),
  themeId: z.string().min(1),
+  pageDecorationsMode: pageDecorationsModeSchema.default("theme"),
  mermaid: mermaidConfigSchema,
  paper: paperSchema,
  header: headerSchema,
@@ -200,9 +230,30 @@ export type ExportConfig = z.infer<typeof exportConfigSchema>;
 export type MermaidExportConfig = ExportConfig["mermaid"];
 export type PaperFormat = ExportConfig["paper"]["format"];
 export type PaperOrientation = ExportConfig["paper"]["orientation"];
+export type PageMargins = ExportConfig["paper"]["margins"];
+export type MarginMode = ExportConfig["paper"]["marginMode"];
+export type PageDecorationsMode = ExportConfig["pageDecorationsMode"];
 export type HeaderConfig = ExportConfig["header"];
 export type FooterConfig = ExportConfig["footer"];

+export const defaultPageMargins: PageMargins = {
+  top: "16mm",
+  right: "16mm",
+  bottom: "16mm",
+  left: "16mm"
+};
+
+export function resolvePageMargins(
+  paper: Pick<ExportConfig["paper"], "marginMode" | "margins">,
+  themeMargins?: PageMargins
+): PageMargins {
+  const source =
+    paper.marginMode === "theme"
+      ? themeMargins ?? defaultPageMargins
+      : paper.margins;
+  return { ...source };
+}
+
 export function getPaperDimensionsMm(
  format: PaperFormat,
  orientation: PaperOrientation
@@ -222,6 +273,7 @@ export const defaultExportConfig: ExportConfig = {
  version: EXPORT_CONFIG_VERSION,
  name: "默认 A4 文档",
  themeId: "typora-github",
+  pageDecorationsMode: "theme",
  mermaid: {
    layout: "dagre",
    theme: "default",
@@ -231,18 +283,15 @@ export const defaultExportConfig: ExportConfig = {
  paper: {
    format: "A4",
    orientation: "portrait",
-    margins: {
-      top: "16mm",
-      right: "16mm",
-      bottom: "16mm",
-      left: "16mm"
-    }
+    marginMode: "theme",
+    margins: { ...defaultPageMargins }
  },
  header: {
    enabled: false,
    height: "8mm",
    showDivider: false,
    fontSize: "3mm",
+    fontFamily: '"Segoe UI", "Microsoft YaHei", sans-serif',
    color: "#6b7280",
    left: disabledHeaderSlot,
    center: disabledHeaderSlot,
@@ -253,10 +302,12 @@ export const defaultExportConfig: ExportConfig = {
    height: "8mm",
    showDivider: false,
    fontSize: "3mm",
+    fontFamily: '"Segoe UI", "Microsoft YaHei", sans-serif',
    color: "#6b7280",
    alignment: "center",
    format: "page-total",
-    startFrom: 1
+    startFrom: 1,
+    showOnFirstPage: true
  },
  metadata: {
    title: "",
@@ -1,3 +1,5 @@
 export * from "./document.js";
+export * from "./document-profile.js";
+export * from "./document-link.js";
 export * from "./export-config.js";
 export * from "./theme.js";
@@ -1,4 +1,10 @@
 import { z } from "zod";
+import { documentProfileNameSchema } from "./document-profile.js";
+import {
+  footerSchema,
+  headerSchema,
+  pageMarginsSchema
+} from "./export-config.js";

 export const THEME_MANIFEST_VERSION = 1;

@@ -12,6 +18,13 @@ export const themeFeatureSchema = z.enum([
  "echarts"
 ]);

+export const themeCategorySchema = z.enum([
+  "general",
+  "red-letter",
+  "formal",
+  "tender"
+]);
+
 export const themeManifestSchema = z.object({
  manifestVersion: z.literal(THEME_MANIFEST_VERSION),
  id: z.string().regex(/^[a-z0-9]+(?:-[a-z0-9]+)*$/),
@@ -26,8 +39,20 @@ export const themeManifestSchema = z.object({
  domPreset: z.enum(["typora", "github", "generic"]),
  defaultFontSize: z.string(),
  supportedFeatures: z.array(themeFeatureSchema),
+  category: themeCategorySchema.default("general"),
+  compatibleProfiles: z
+    .array(documentProfileNameSchema)
+    .default([]),
+  pageDefaults: z
+    .object({
+      margins: pageMarginsSchema,
+      header: headerSchema.optional(),
+      footer: footerSchema.optional()
+    })
+    .optional(),
  bundled: z.boolean()
 });

 export type ThemeManifest = z.infer<typeof themeManifestSchema>;
 export type ThemeFeature = z.infer<typeof themeFeatureSchema>;
+export type ThemeCategory = z.infer<typeof themeCategorySchema>;
@@ -0,0 +1,94 @@
+import { describe, expect, it } from "vitest";
+import {
+  classifyDocumentLink,
+  decodeLocalDocumentLinkFromPdf,
+  encodeLocalDocumentLinkForPdf,
+  isSafeDocumentLink
+} from "../src/document-link.js";
+
+describe("文档链接分类", () => {
+  it("识别文档锚点和网络链接", () => {
+    expect(classifyDocumentLink("#章节一").kind).toBe("anchor");
+    expect(
+      classifyDocumentLink("https://example.com/a").kind
+    ).toBe("network");
+    expect(
+      classifyDocumentLink("//example.com/a").normalizedHref
+    ).toBe("https://example.com/a");
+  });
+
+  it("识别浏览器协议处理器和未知协议", () => {
+    expect(classifyDocumentLink("mailto:a@example.com")).toMatchObject({
+      kind: "protocol",
+      scheme: "mailto"
+    });
+    expect(classifyDocumentLink("tel:+8612345")).toMatchObject({
+      kind: "protocol",
+      scheme: "tel"
+    });
+    expect(classifyDocumentLink("obsidian://open?vault=x")).toMatchObject({
+      kind: "protocol",
+      scheme: "obsidian"
+    });
+  });
+
+  it("识别跨目录、绝对路径、UNC 和 file URI", () => {
+    for (const href of [
+      "../docs/a.md",
+      "/opt/docs/a.md",
+      "C:/docs/a.md",
+      "D:\\docs\\a.md",
+      "\\\\server\\share\\a.md",
+      "file:///C:/docs/a.md"
+    ]) {
+      expect(classifyDocumentLink(href).kind).toBe("local");
+    }
+  });
+
+  it("拒绝危险协议、控制字符和无效网络地址", () => {
+    for (const href of [
+      "javascript:alert(1)",
+      "vbscript:msgbox(1)",
+      "data:text/html;base64,WA=="
+    ]) {
+      expect(classifyDocumentLink(href).kind).toBe("unsafe");
+      expect(isSafeDocumentLink(href)).toBe(false);
+    }
+    expect(classifyDocumentLink("https://[invalid").kind).toBe(
+      "invalid"
+    );
+    expect(classifyDocumentLink("a\u0000b").kind).toBe("invalid");
+  });
+
+  it("为 PDF 注释编码并还原本地链接", () => {
+    for (const href of [
+      "../docs/说明.md#章节",
+      "C:/docs/a.md",
+      "file:///D:/docs/a.md"
+    ]) {
+      const encoded = encodeLocalDocumentLinkForPdf(href);
+      expect(encoded).toMatch(
+        /^https:\/\/mdpdf\.local\.invalid\/document-link\?/u
+      );
+      expect(decodeLocalDocumentLinkFromPdf(encoded ?? "")).toBe(
+        href
+      );
+    }
+  });
+
+  it("不编码网络链接且拒绝伪造的 PDF 本地链接", () => {
+    expect(
+      encodeLocalDocumentLinkForPdf("https://example.com")
+    ).toBeUndefined();
+    expect(
+      decodeLocalDocumentLinkFromPdf(
+        "https://mdpdf.local.invalid/document-link?href=https%3A%2F%2Fexample.com"
+      )
+    ).toBeUndefined();
+    expect(
+      decodeLocalDocumentLinkFromPdf(
+        "https://example.com/document-link?href=..%2Fa.md"
+      )
+    ).toBeUndefined();
+  });
+});
@@ -7,6 +7,7 @@ import {
  millimetersToCssPixels,
  millimetersToPdfPoints,
  paperDimensionsMm,
+  resolvePageMargins,
  supportedMermaidLayouts,
  supportedMermaidLooks,
  supportedMermaidThemes,
@@ -32,9 +33,12 @@ describe("导出配置", () => {
  });

  it("使用 A4 和 16mm 作为默认纸张配置", () => {
+    expect(defaultExportConfig.themeId).toBe("typora-github");
+    expect(defaultExportConfig.pageDecorationsMode).toBe("theme");
    expect(defaultExportConfig.paper).toEqual({
      format: "A4",
      orientation: "portrait",
+      marginMode: "theme",
      margins: {
        top: "16mm",
        right: "16mm",
@@ -45,6 +49,103 @@ describe("导出配置", () => {
    expect(exportConfigSchema.safeParse(defaultExportConfig).success).toBe(true);
  });

+  it("提供可由主题推荐的页眉和页码配置", () => {
+    expect(defaultExportConfig.header).toMatchObject({
+      fontFamily: '"Segoe UI", "Microsoft YaHei", sans-serif'
+    });
+    expect(defaultExportConfig.footer).toMatchObject({
+      fontFamily: '"Segoe UI", "Microsoft YaHei", sans-serif',
+      alignment: "center",
+      format: "page-total",
+      showOnFirstPage: true
+    });
+
+    const parsedLegacyV4 = exportConfigSchema.parse({
+      ...defaultExportConfig,
+      pageDecorationsMode: undefined,
+      header: {
+        ...defaultExportConfig.header,
+        fontFamily: undefined
+      },
+      footer: {
+        ...defaultExportConfig.footer,
+        fontFamily: undefined,
+        showOnFirstPage: undefined
+      }
+    });
+
+    expect(parsedLegacyV4.pageDecorationsMode).toBe("theme");
+    expect(parsedLegacyV4.header.fontFamily).toContain("Microsoft YaHei");
+    expect(parsedLegacyV4.footer.fontFamily).toContain("Microsoft YaHei");
+    expect(parsedLegacyV4.footer.showOnFirstPage).toBe(true);
+  });
+
+  it("支持公文页码格式和奇偶页外侧对齐", () => {
+    expect(
+      exportConfigSchema.safeParse({
+        ...defaultExportConfig,
+        footer: {
+          ...defaultExportConfig.footer,
+          fontFamily: '"Mdpdf Fandol Song", SimSun, serif',
+          fontSize: "4.94mm",
+          color: "#000000",
+          alignment: "outer",
+          format: "official-page",
+          showOnFirstPage: false
+        }
+      }).success
+    ).toBe(true);
+  });
+
+  it("拒绝可能逃逸 CSS 字体声明的页眉页码字体", () => {
+    expect(
+      exportConfigSchema.safeParse({
+        ...defaultExportConfig,
+        footer: {
+          ...defaultExportConfig.footer,
+          fontFamily: 'serif; color: red'
+        }
+      }).success
+    ).toBe(false);
+  });
+
+  it("按主题、自定义和全局默认顺序解析页边距", () => {
+    const themeMargins = {
+      top: "37mm",
+      right: "26mm",
+      bottom: "35mm",
+      left: "28mm"
+    };
+    expect(resolvePageMargins(defaultExportConfig.paper, themeMargins)).toEqual(
+      themeMargins
+    );
+    expect(resolvePageMargins(defaultExportConfig.paper)).toEqual({
+      top: "16mm",
+      right: "16mm",
+      bottom: "16mm",
+      left: "16mm"
+    });
+    expect(
+      resolvePageMargins(
+        {
+          marginMode: "custom",
+          margins: {
+            top: "10mm",
+            right: "11mm",
+            bottom: "12mm",
+            left: "13mm"
+          }
+        },
+        themeMargins
+      )
+    ).toEqual({
+      top: "10mm",
+      right: "11mm",
+      bottom: "12mm",
+      left: "13mm"
+    });
+  });
+
  it("提供 Mermaid 官方布局、主题、外观和字体默认值", () => {
    expect(supportedMermaidLayouts).toEqual(["dagre", "elk"]);
    expect(supportedMermaidLooks).toEqual([
@@ -0,0 +1,60 @@
+import { describe, expect, it } from "vitest";
+import { themeManifestSchema } from "../src/theme.js";
+
+describe("主题清单", () => {
+  it("允许主题推荐页边距、页眉和页码配置", () => {
+    const parsed = themeManifestSchema.parse({
+      manifestVersion: 1,
+      id: "official-test",
+      name: "公文测试主题",
+      version: "0.5.1",
+      description: "测试主题推荐页面配置。",
+      author: "md-to-pdf contributors",
+      license: "项目自有",
+      entry: "theme.css",
+      domPreset: "generic",
+      defaultFontSize: "21.333px",
+      supportedFeatures: ["table"],
+      category: "red-letter",
+      compatibleProfiles: ["official"],
+      pageDefaults: {
+        margins: {
+          top: "37mm",
+          right: "26mm",
+          bottom: "35mm",
+          left: "28mm"
+        },
+        header: {
+          enabled: false,
+          height: "8mm",
+          showDivider: false,
+          fontSize: "4.94mm",
+          fontFamily: '"Mdpdf Fandol Song", SimSun, serif',
+          color: "#000000",
+          left: { enabled: false, content: "" },
+          center: { enabled: false, content: "" },
+          right: { enabled: false, content: "" }
+        },
+        footer: {
+          enabled: true,
+          height: "7mm",
+          showDivider: false,
+          fontSize: "4.94mm",
+          fontFamily: '"Mdpdf Fandol Song", SimSun, serif',
+          color: "#000000",
+          alignment: "outer",
+          format: "official-page",
+          startFrom: 1,
+          showOnFirstPage: false
+        }
+      },
+      bundled: true
+    });
+
+    expect(parsed.pageDefaults?.footer).toMatchObject({
+      alignment: "outer",
+      format: "official-page",
+      showOnFirstPage: false
+    });
+  });
+});
@@ -5,6 +5,26 @@

 该包不依赖 React、Paged.js 或特定 PDF 引擎。宿主可以将生成的
 HTML 用于网页预览，也可以在图表完成渲染后交给 Chromium 输出 PDF。
+本项目由 `@md-to-pdf/renderer` 接入围栏插件，再由
+`@md-to-pdf/preview-engine` 统一完成连续预览、分页适配和 SVG 冻结。
+
+## 目录结构
+
+```text
+src/
+  markdown-it-plugin.ts  ECharts YAML 围栏与错误占位
+  parse-yaml.ts          受限 YAML 解析
+  protocol.ts            围栏协议与基础校验
+  security-policy.ts     URL、函数、原型和规模安全策略
+  semantic-validator.ts  系列数据与坐标系语义校验
+  dom-contract.ts        宿主与浏览器运行时共用的 DOM 协议
+  browser.ts             浏览器入口
+  browser/               ECharts 按需加载、渲染和 SVG 冻结
+  index.ts               Markdown 侧公共导出
+styles/
+  echarts.css            图表、标题和错误占位样式
+tests/                   解析、安全、语义、插件和真实 SVG 测试
+```

 ## 基本语法

@@ -263,6 +283,8 @@ Chromium `page.pdf()`。

 浏览器引擎会强制关闭全局及各系列动画，Markdown 中的动画参数不会改变
 静态 SVG、快速预览、精确预览或 PDF，避免输出停留在动画中间帧。
+ECharts 围栏使用专用 `figure.md-echarts` DOM，不会套用普通代码围栏的
+`pre.md-fences` 样式。

 ## 安全边界

@@ -289,6 +311,15 @@ Chromium `page.pdf()`。
 3. 注册该系列的语义验证器；
 4. 增加有效、缺少数据、错误数据结构和真实 SVG 渲染测试。

+## 开发与验证
+
+```powershell
+npm run dev -w @md-to-pdf/markdown-echarts
+npm run test -w @md-to-pdf/markdown-echarts
+npm run typecheck -w @md-to-pdf/markdown-echarts
+npm run build -w @md-to-pdf/markdown-echarts
+```
+
 参考：

 - [ECharts 配置参考](https://echarts.apache.org/en/option.html)
@@ -0,0 +1,92 @@
+# @md-to-pdf/preview-engine
+
+Markdown PDF 导出器的共享预览与分页引擎。Web 连续/快速预览、服务端
+Playwright PDF 和 Electron PDF 均通过同一套运行时完成媒体渲染、尺寸
+适配与 Paged.js 分页。
+
+## 目录结构
+
+```text
+src/
+├── index.ts                    公共导出入口
+├── paged-document-runtime.ts   连续与分页渲染主流程
+├── paged-preview.ts            分页载荷、消息协议与页面 CSS
+├── continuous-preview.ts       无分页 DOM 更新与稳定节点复用
+├── incremental-pagination.ts   修改边界、稳定前缀与后缀分页缓存
+├── paged-table-handler.ts      跨页表格表头处理
+├── media-page-backfill.ts      图片与图表按文档顺序回填
+├── document-image-fit.ts       Markdown 图片单页适配
+├── mermaid-*.ts                Mermaid 配置、渲染与尺寸适配
+├── echarts-page-fit.ts         ECharts 单页适配
+├── diagram-page-fit.ts         图像类元素的共享几何计算
+├── pdf-document-links.ts       PDF 本地链接暂存编码
+├── preview-styles.ts           预览/打印媒体样式转换
+└── paged-render-target.ts      Preview 与 PDF 运行目标
+tests/                          引擎单元测试
+```
+
+## 使用方式
+
+宿主负责提供渲染根节点和三份第三方样式，公共引擎不依赖 Vite 的
+`?inline` 导入语法：
+
+```ts
+import { PagedDocumentRuntime } from "@md-to-pdf/preview-engine";
+
+const runtime = new PagedDocumentRuntime(root, {
+  highlightCss,
+  katexCss,
+  echartsCss
+});
+
+const result = await runtime.render(payload, {
+  target: "preview",
+  mermaidOutput: "svg-image"
+});
+
+const continuous = await runtime.renderContinuous(payload);
+```
+
+`payload` 使用 `@md-to-pdf/core` 中的 `PagedDocumentPayload`。主题 CSS、
+纸张尺寸、页边距、页眉页脚及 Markdown 功能标识都随载荷传入。
+
+## 连续预览与增量分页
+
+- `renderContinuous()` 不创建纸张和分页节点，只更新统一 `#write` DOM；
+- 连续模式仍等待并渲染 Mermaid、ECharts、图片和字体；
+- 快速分页为源块生成稳定身份，编辑后保留修改点之前的分页结果；
+- 重新计算从最早受影响位置开始，后续页面串行生成；
+- 缓存不参与 Playwright/Electron 的最终 PDF 权威输出。
+
+围栏代码块遵循 Typora DOM 约定：外层 `pre.md-fences` 负责主题样式，
+内部语义 `<code>` 会清除重复的行内代码背景、边框、内边距和字号缩放，
+不使用 `!important`，自定义主题仍可用更具体规则覆盖。
+
+## 媒体分页
+
+图片、Mermaid 和 ECharts 必须与紧邻标题作为同一媒体块。引擎按 DOM
+文档顺序串行处理，每个媒体元素至多回填或缩放一次。图片先按内容限宽
+得到基准高度；上一页空白与媒体需求接近时，才尝试只缩放媒体主体回填，
+标题始终保持自然尺寸。
+
+## PDF 链接
+
+`preparePdfDocumentLinks()` 仅在 PDF 目标中将本地链接编码为
+`https://mdpdf.local.invalid/...`。PDF.js 注释层通过 core 解码后交给
+Web/Desktop 平台处理，HTTP/HTTPS 和文档内锚点保持原始 PDF 行为。
+
+## 设计边界
+
+- 本包不解析 Markdown；语义 HTML 由 `@md-to-pdf/renderer` 生成。
+- 本包不读取文件、不发 HTTP 请求，也不决定 Web 或 Electron 平台行为。
+- 第三方展示样式由宿主注入，便于浏览器、Playwright 和 Electron 复用。
+- 媒体块按文档顺序串行判断回填，每个媒体元素至多触发一次重排。
+- 连续与分页模式共享媒体渲染、链接和样式契约，不维护两套引擎。
+
+## 验证
+
+```powershell
+npm run test -w @md-to-pdf/preview-engine
+npm run typecheck -w @md-to-pdf/preview-engine
+npm run build -w @md-to-pdf/preview-engine
+```
@@ -0,0 +1,35 @@
+{
+  "name": "@md-to-pdf/preview-engine",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "dev": "tsc -p tsconfig.json --watch --preserveWatchOutput",
+    "build": "tsc -p tsconfig.json",
+    "test": "vitest run",
+    "typecheck": "tsc -p tsconfig.json --noEmit --pretty false"
+  },
+  "dependencies": {
+    "@md-to-pdf/core": "0.1.0",
+    "@md-to-pdf/markdown-echarts": "0.1.0",
+    "@mermaid-js/layout-elk": "0.2.2",
+    "echarts": "6.1.0",
+    "mermaid": "11.16.0",
+    "pagedjs": "^0.4.3"
+  },
+  "devDependencies": {
+    "happy-dom": "^20.11.1",
+    "vitest": "^4.1.10"
+  }
+}
@@ -0,0 +1,134 @@
+const PREPARED_ATTRIBUTE = "data-code-pagination-prepared";
+const CHUNK_CLASS = "md-code-pagination-chunk";
+const CHUNK_POSITION_ATTRIBUTE = "data-code-pagination-position";
+const LINE_GROUP_CLASS = "md-code-line-group";
+const LINE_CLASS = "md-code-line";
+
+function splitNodeIntoLines(node: Node): Node[][] {
+  const documentRef = node.ownerDocument;
+  if (!documentRef) {
+    throw new Error("代码块分页节点缺少 ownerDocument");
+  }
+  if (node.nodeType === node.TEXT_NODE) {
+    return (node.textContent ?? "").split("\n").map((text) => [
+      documentRef.createTextNode(text)
+    ]);
+  }
+
+  if (node.nodeType !== node.ELEMENT_NODE) {
+    return [[node.cloneNode(true)]];
+  }
+
+  const lineChildren = splitNodesIntoLines(
+    Array.from(node.childNodes)
+  );
+  return lineChildren.map((children) => {
+    const clone = node.cloneNode(false) as Element;
+    clone.append(...children);
+    return [clone];
+  });
+}
+
+function splitNodesIntoLines(nodes: Node[]): Node[][] {
+  const lines: Node[][] = [[]];
+
+  for (const node of nodes) {
+    const nodeLines = splitNodeIntoLines(node);
+    lines.at(-1)?.push(...(nodeLines[0] ?? []));
+    for (const line of nodeLines.slice(1)) {
+      lines.push([...line]);
+    }
+  }
+
+  return lines;
+}
+
+function lineHasContent(nodes: Node[]) {
+  return nodes.some((node) => (node.textContent ?? "").length > 0);
+}
+
+function createLineGroups(
+  documentRef: Document,
+  lines: Node[][]
+) {
+  const groups: HTMLElement[] = [];
+  let lineIndex = 0;
+
+  while (lineIndex < lines.length) {
+    const remaining = lines.length - lineIndex;
+    const groupSize =
+      remaining === 1 ? 1 : remaining === 3 ? 3 : 2;
+    const group = documentRef.createElement("span");
+    group.className = LINE_GROUP_CLASS;
+
+    for (
+      let offset = 0;
+      offset < groupSize && lineIndex < lines.length;
+      offset += 1, lineIndex += 1
+    ) {
+      const line = documentRef.createElement("span");
+      line.className = LINE_CLASS;
+      line.append(...(lines[lineIndex] ?? []));
+      group.append(line);
+    }
+
+    groups.push(group);
+  }
+
+  return groups;
+}
+
+export function prepareCodeBlockPagination(root: ParentNode) {
+  const codeBlocks = Array.from(
+    root.querySelectorAll<HTMLElement>(
+      `pre.md-fences:not([${PREPARED_ATTRIBUTE}])`
+    )
+  );
+
+  for (const codeBlock of codeBlocks) {
+    const code = codeBlock.querySelector<HTMLElement>(
+      ":scope > code"
+    );
+    if (!code) {
+      continue;
+    }
+
+    const sourceEndsWithNewline =
+      code.textContent?.endsWith("\n") ?? false;
+    const lines = splitNodesIntoLines(Array.from(code.childNodes));
+    if (
+      sourceEndsWithNewline &&
+      lines.length > 1 &&
+      !lineHasContent(lines.at(-1) ?? [])
+    ) {
+      lines.pop();
+    }
+
+    const groups = createLineGroups(code.ownerDocument, lines);
+    const chunks = groups.map((group, index) => {
+      const chunk = code.ownerDocument.createElement("div");
+      for (const attribute of Array.from(codeBlock.attributes)) {
+        chunk.setAttribute(attribute.name, attribute.value);
+      }
+      chunk.classList.add(CHUNK_CLASS);
+      chunk.setAttribute(PREPARED_ATTRIBUTE, "true");
+      chunk.setAttribute(
+        CHUNK_POSITION_ATTRIBUTE,
+        groups.length === 1
+          ? "only"
+          : index === 0
+            ? "first"
+            : index === groups.length - 1
+              ? "last"
+              : "middle"
+      );
+
+      const chunkCode = code.cloneNode(false) as HTMLElement;
+      chunkCode.append(group);
+      chunk.append(chunkCode);
+      return chunk;
+    });
+
+    codeBlock.replaceWith(...chunks);
+  }
+}
@@ -0,0 +1,41 @@
+export function findCommonPrefixLength(
+  previous: readonly string[],
+  next: readonly string[]
+) {
+  const maximum = Math.min(previous.length, next.length);
+  let index = 0;
+  while (index < maximum && previous[index] === next[index]) {
+    index += 1;
+  }
+  return index;
+}
+
+export function createNodeSignature(node: Node) {
+  if (node instanceof Element) {
+    return `element:${node.outerHTML}`;
+  }
+  return `node:${node.nodeType}:${node.textContent ?? ""}`;
+}
+
+export function mountContinuousRenderStage(
+  root: HTMLElement,
+  articleTemplate: HTMLElement,
+  content: DocumentFragment
+) {
+  const article = articleTemplate.cloneNode(false) as HTMLElement;
+  article.dataset.continuousRenderStage = "true";
+  article.append(content);
+  root.append(article);
+
+  return {
+    article,
+    takeContent() {
+      const rendered = article.ownerDocument.createDocumentFragment();
+      rendered.append(...Array.from(article.childNodes));
+      return rendered;
+    },
+    dispose() {
+      article.remove();
+    }
+  };
+}
@@ -30,6 +30,58 @@ export interface SvgDiagramFitOptions {

 const PAGE_FIT_EPSILON_PX = 1;

+function parsePixelValue(value: string) {
+  const parsed = Number.parseFloat(value);
+  return Number.isFinite(parsed) ? parsed : 0;
+}
+
+export function getPrecedingMediaTitleHeight(
+  element: HTMLElement
+) {
+  const title = element.previousElementSibling;
+  if (
+    !(title instanceof HTMLElement) ||
+    !/^H[1-6]$/.test(title.tagName)
+  ) {
+    return 0;
+  }
+
+  const style = getComputedStyle(title);
+  title.style.setProperty("break-after", "avoid-page", "important");
+  title.style.setProperty(
+    "page-break-after",
+    "avoid",
+    "important"
+  );
+  return (
+    title.getBoundingClientRect().height +
+    parsePixelValue(style.marginTop) +
+    parsePixelValue(style.marginBottom)
+  );
+}
+
+export function ensurePageBreakAfter(element: HTMLElement) {
+  const existingMarker = element.nextElementSibling;
+  if (
+    existingMarker instanceof HTMLElement &&
+    existingMarker.dataset.mediaPageBreak === "true"
+  ) {
+    return existingMarker;
+  }
+  const marker = element.ownerDocument.createElement("div");
+  marker.dataset.mediaPageBreak = "true";
+  marker.setAttribute("aria-hidden", "true");
+  marker.style.setProperty("height", "0", "important");
+  marker.style.setProperty("break-before", "page", "important");
+  marker.style.setProperty(
+    "page-break-before",
+    "always",
+    "important"
+  );
+  element.after(marker);
+  return marker;
+}
+
 export function parseSvgViewBox(
  value: string | null
 ): DiagramDimensions | undefined {
@@ -144,9 +196,17 @@ export function fitSvgDiagramsToPage(
      continue;
    }

-    const availablePageContent =
+    const resolvedPageContent =
      options.resolvePageContent?.(container, pageContent) ??
      pageContent;
+    const availablePageContent = {
+      width: resolvedPageContent.width,
+      height: Math.max(
+        0,
+        resolvedPageContent.height -
+          getPrecedingMediaTitleHeight(container)
+      )
+    };
    const fit = calculateDiagramPageFit(
      intrinsic,
      availablePageContent
@@ -157,6 +217,13 @@ export function fitSvgDiagramsToPage(

    container.dataset.pageHeightFitted = "true";
    container.style.setProperty("margin-block", "0", "important");
+    container.style.setProperty("break-after", "page", "important");
+    container.style.setProperty(
+      "page-break-after",
+      "always",
+      "important"
+    );
+    ensurePageBreakAfter(container);
    if (!svg.getAttribute("viewBox")) {
      svg.setAttribute(
        "viewBox",
@@ -1,8 +1,10 @@
 import type { ExportConfig } from "@md-to-pdf/core";
 import {
  calculateDiagramPageFit,
-  getPageContentDimensions
-} from "./diagram-page-fit";
+  ensurePageBreakAfter,
+  getPageContentDimensions,
+  getPrecedingMediaTitleHeight
+} from "./diagram-page-fit.js";

 function getImageBlock(image: HTMLImageElement) {
  const parent = image.parentElement;
@@ -23,11 +25,30 @@ function getImageBlock(image: HTMLImageElement) {
  return undefined;
 }

+export function prepareDocumentImageBlocks(root: ParentNode) {
+  const images = Array.from(
+    root.querySelectorAll<HTMLImageElement>("img.md-document-image")
+  );
+  let prepared = 0;
+
+  for (const image of images) {
+    if (getImageBlock(image)) {
+      prepared += 1;
+    }
+  }
+
+  return prepared;
+}
+
 export function fitDocumentImagesToPage(
  root: ParentNode,
-  config: ExportConfig
+  config: ExportConfig,
+  options: { prepareBlocks?: boolean } = {}
 ) {
  const pageContent = getPageContentDimensions(config);
+  if (options.prepareBlocks !== false) {
+    prepareDocumentImageBlocks(root);
+  }
  const images = Array.from(
    root.querySelectorAll<HTMLImageElement>("img.md-document-image")
  );
@@ -42,11 +63,17 @@ export function fitDocumentImagesToPage(
    const imageHeight = image.getBoundingClientRect().height;
    const blockHeight = block?.getBoundingClientRect().height ?? imageHeight;
    const nonImageHeight = Math.max(0, blockHeight - imageHeight);
+    const titleHeight = block
+      ? getPrecedingMediaTitleHeight(block)
+      : 0;
    const fit = calculateDiagramPageFit(
      { width, height },
      {
        width: pageContent.width,
-        height: Math.max(0, pageContent.height - nonImageHeight)
+        height: Math.max(
+          0,
+          pageContent.height - nonImageHeight - titleHeight
+        )
      }
    );
    if (!fit.scaled) {
@@ -55,6 +82,13 @@ export function fitDocumentImagesToPage(
    if (block?.classList.contains("md-document-image-block")) {
      block.dataset.pageHeightFitted = "true";
      block.style.setProperty("margin-block", "0", "important");
+      block.style.setProperty("break-after", "page", "important");
+      block.style.setProperty(
+        "page-break-after",
+        "always",
+        "important"
+      );
+      ensurePageBreakAfter(block);
    }
    image.dataset.pageHeightFitted = "true";
    image.style.setProperty("display", "block");
@@ -1,5 +1,5 @@
 import type { ExportConfig } from "@md-to-pdf/core";
-import { fitSvgDiagramsToPage } from "./diagram-page-fit";
+import { fitSvgDiagramsToPage } from "./diagram-page-fit.js";

 export function fitOversizedEChartsToPage(
  container: ParentNode,
@@ -0,0 +1,109 @@
+export interface PagedBreakTokenLike {
+  node?: Node;
+  offset?: number;
+}
+
+export interface PagedPageLike {
+  element: HTMLElement;
+  startToken?: PagedBreakTokenLike;
+}
+
+export interface IncrementalPaginationPlan {
+  prefixLength: number;
+  invalidationPageIndex: number;
+  startToken: PagedBreakTokenLike | undefined;
+}
+
+function getNodeReference(node: Node | undefined) {
+  if (!node) {
+    return undefined;
+  }
+  if (node instanceof HTMLElement && node.dataset.ref) {
+    return node.dataset.ref;
+  }
+  return node.parentElement?.dataset.ref;
+}
+
+function pageContainsReference(
+  page: PagedPageLike,
+  reference: string
+) {
+  return Array.from(
+    page.element.querySelectorAll<HTMLElement>("[data-ref]")
+  ).some((element) => element.dataset.ref === reference);
+}
+
+export function findSourceNodePageIndex(
+  pages: readonly PagedPageLike[],
+  sourceNode: Node | undefined
+) {
+  const reference = getNodeReference(sourceNode);
+  if (!reference) {
+    return undefined;
+  }
+  const pageIndex = pages.findIndex((page) =>
+    pageContainsReference(page, reference)
+  );
+  return pageIndex >= 0 ? pageIndex : undefined;
+}
+
+export function createIncrementalPaginationPlan(
+  prefixLength: number,
+  previousNodeCount: number,
+  sourceNodes: readonly Node[],
+  pages: readonly PagedPageLike[]
+): IncrementalPaginationPlan | undefined {
+  if (
+    prefixLength <= 0 ||
+    pages.length === 0 ||
+    prefixLength > sourceNodes.length ||
+    prefixLength > previousNodeCount
+  ) {
+    return undefined;
+  }
+
+  const boundaryNode =
+    sourceNodes[prefixLength] ??
+    sourceNodes[prefixLength - 1];
+  const boundaryPageIndex =
+    findSourceNodePageIndex(pages, boundaryNode);
+  if (boundaryPageIndex === undefined) {
+    return undefined;
+  }
+
+  // 媒体块允许回填到上一页，因此变化边界必须额外向前回退一页。
+  const invalidationPageIndex = Math.max(
+    0,
+    boundaryPageIndex - 1
+  );
+  return {
+    prefixLength,
+    invalidationPageIndex,
+    startToken: pages[invalidationPageIndex]?.startToken
+  };
+}
+
+export function assignPagedSourceReferences(
+  root: Node,
+  createReference: () => string
+) {
+  const elements: Element[] = [];
+  if (root instanceof Element) {
+    elements.push(root);
+  }
+  const queryRoot = root as Node & {
+    querySelectorAll?: ParentNode["querySelectorAll"];
+  };
+  if (typeof queryRoot.querySelectorAll === "function") {
+    elements.push(...Array.from(queryRoot.querySelectorAll("*")));
+  }
+
+  for (const element of elements) {
+    if (!element.hasAttribute("data-ref")) {
+      element.setAttribute("data-ref", createReference());
+    }
+    if (element.id) {
+      element.setAttribute("data-id", element.id);
+    }
+  }
+}
@@ -0,0 +1,16 @@
+export * from "./diagram-page-fit.js";
+export * from "./continuous-preview.js";
+export * from "./document-image-fit.js";
+export * from "./echarts-page-fit.js";
+export * from "./incremental-pagination.js";
+export * from "./media-page-backfill.js";
+export * from "./mermaid-config.js";
+export * from "./mermaid-page-fit.js";
+export * from "./mermaid-renderer.js";
+export * from "./mermaid-static-image.js";
+export * from "./paged-break-token.js";
+export * from "./paged-document-runtime.js";
+export * from "./paged-preview.js";
+export * from "./paged-render-target.js";
+export * from "./pdf-document-links.js";
+export * from "./preview-styles.js";
@@ -0,0 +1,397 @@
+export type MediaBackfillKind = "image" | "mermaid" | "echarts";
+
+export interface MediaBackfillGeometry {
+  remainingHeight: number;
+  fixedHeight: number;
+  baselineVisualHeight: number;
+}
+
+export interface MediaBackfillCandidate {
+  id: string;
+  scale: number;
+}
+
+export interface MediaBackfillOptions {
+  minimumScale?: number;
+  safetyGapPx?: number;
+}
+
+const MEDIA_BLOCK_SELECTOR = [
+  ".md-document-image-block",
+  ".mermaid:not(.mermaid-error)",
+  ".md-echarts:not(.md-echarts-error)"
+].join(", ");
+const DEFAULT_MINIMUM_SCALE = 0.88;
+const DEFAULT_SAFETY_GAP_PX = 2;
+const SCALE_EPSILON = 0.001;
+
+function finitePositive(value: string | undefined) {
+  const parsed = Number.parseFloat(value ?? "");
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : undefined;
+}
+
+function getMediaKind(block: Element): MediaBackfillKind | undefined {
+  if (block.classList.contains("md-document-image-block")) {
+    return "image";
+  }
+  if (block.classList.contains("mermaid")) {
+    return "mermaid";
+  }
+  if (block.classList.contains("md-echarts")) {
+    return "echarts";
+  }
+  return undefined;
+}
+
+function getMediaVisual(
+  block: Element,
+  kind: MediaBackfillKind
+): HTMLElement | SVGSVGElement | undefined {
+  if (kind === "image") {
+    return (
+      block.querySelector<HTMLImageElement>("img.md-document-image") ??
+      undefined
+    );
+  }
+  if (kind === "echarts") {
+    return (
+      block.querySelector<HTMLElement>(".md-echarts-host") ??
+      undefined
+    );
+  }
+  return (
+    block.querySelector<SVGSVGElement>("svg") ??
+    block.querySelector<HTMLImageElement>("img") ??
+    undefined
+  );
+}
+
+function parsePixelValue(value: string) {
+  const parsed = Number.parseFloat(value);
+  return Number.isFinite(parsed) ? parsed : 0;
+}
+
+function getOuterBottom(element: HTMLElement) {
+  const rect = element.getBoundingClientRect();
+  return (
+    rect.bottom +
+    parsePixelValue(getComputedStyle(element).marginBottom)
+  );
+}
+
+function getOuterTop(element: HTMLElement) {
+  const rect = element.getBoundingClientRect();
+  return (
+    rect.top -
+    parsePixelValue(getComputedStyle(element).marginTop)
+  );
+}
+
+function getMediaGroupTop(
+  block: HTMLElement,
+  pageContentTop: number
+) {
+  const title = block.previousElementSibling;
+  if (
+    title instanceof HTMLElement &&
+    /^H[1-6]$/.test(title.tagName)
+  ) {
+    return Math.max(
+      pageContentTop,
+      getOuterTop(title)
+    );
+  }
+  return Math.max(
+    pageContentTop,
+    getOuterTop(block)
+  );
+}
+
+function getLastContentBottom(pageContent: HTMLElement) {
+  const contentRect = pageContent.getBoundingClientRect();
+  const leafElements = Array.from(
+    pageContent.querySelectorAll<HTMLElement>("[data-ref]")
+  ).filter(
+    (element) => !element.querySelector("[data-ref]")
+  );
+  let bottom = contentRect.top;
+
+  for (const element of leafElements) {
+    const rect = element.getBoundingClientRect();
+    if (
+      rect.width <= 0 ||
+      rect.height <= 0 ||
+      rect.bottom <= contentRect.top ||
+      rect.top >= contentRect.bottom
+    ) {
+      continue;
+    }
+    bottom = Math.max(
+      bottom,
+      Math.min(getOuterBottom(element), contentRect.bottom)
+    );
+  }
+  return bottom;
+}
+
+function hasForcedBreakBefore(block: HTMLElement) {
+  const title = block.previousElementSibling;
+  const elements = [
+    block,
+    title instanceof HTMLElement && /^H[1-6]$/.test(title.tagName)
+      ? title
+      : undefined
+  ].filter((element): element is HTMLElement => Boolean(element));
+  return elements.some((element) => {
+    const style = getComputedStyle(element);
+    return (
+      style.breakBefore === "page" ||
+      style.pageBreakBefore === "always"
+    );
+  });
+}
+
+export function calculateMediaBackfillScale(
+  geometry: MediaBackfillGeometry,
+  options: MediaBackfillOptions = {}
+) {
+  const minimumScale =
+    options.minimumScale ?? DEFAULT_MINIMUM_SCALE;
+  const safetyGapPx =
+    options.safetyGapPx ?? DEFAULT_SAFETY_GAP_PX;
+  if (
+    !Number.isFinite(geometry.remainingHeight) ||
+    !Number.isFinite(geometry.fixedHeight) ||
+    !Number.isFinite(geometry.baselineVisualHeight) ||
+    geometry.remainingHeight <= 0 ||
+    geometry.fixedHeight < 0 ||
+    geometry.baselineVisualHeight <= 0 ||
+    !Number.isFinite(minimumScale) ||
+    minimumScale <= 0 ||
+    minimumScale >= 1 ||
+    !Number.isFinite(safetyGapPx) ||
+    safetyGapPx < 0
+  ) {
+    return undefined;
+  }
+
+  const availableVisualHeight =
+    geometry.remainingHeight -
+    geometry.fixedHeight -
+    safetyGapPx;
+  const scale =
+    availableVisualHeight / geometry.baselineVisualHeight;
+  if (
+    scale < minimumScale ||
+    scale >= 1 - SCALE_EPSILON
+  ) {
+    return undefined;
+  }
+  return scale;
+}
+
+export function prepareMediaBackfillBlocks(root: ParentNode) {
+  const blocks = Array.from(
+    root.querySelectorAll<HTMLElement>(MEDIA_BLOCK_SELECTOR)
+  );
+  let prepared = 0;
+
+  for (const [index, block] of blocks.entries()) {
+    const kind = getMediaKind(block);
+    const visual = kind ? getMediaVisual(block, kind) : undefined;
+    const rect = visual?.getBoundingClientRect();
+    if (
+      !kind ||
+      !visual ||
+      !rect ||
+      rect.width <= 0 ||
+      rect.height <= 0
+    ) {
+      continue;
+    }
+
+    block.dataset.mediaBackfillId = `media-${index + 1}`;
+    block.dataset.mediaBackfillKind = kind;
+    block.dataset.mediaBaselineWidth = String(rect.width);
+    block.dataset.mediaBaselineHeight = String(rect.height);
+    prepared += 1;
+  }
+
+  return prepared;
+}
+
+export function getMediaBackfillIdsInDocumentOrder(
+  root: ParentNode
+) {
+  return Array.from(
+    root.querySelectorAll<HTMLElement>(
+      "[data-media-backfill-id]"
+    )
+  ).flatMap((block) =>
+    block.dataset.mediaBackfillId
+      ? [block.dataset.mediaBackfillId]
+      : []
+  );
+}
+
+export function findMediaBackfillCandidates(
+  root: ParentNode,
+  options: MediaBackfillOptions = {}
+) {
+  const pages = Array.from(
+    root.querySelectorAll<HTMLElement>(".pagedjs_page")
+  );
+  const candidates: MediaBackfillCandidate[] = [];
+  const candidateIds = new Set<string>();
+
+  for (let pageIndex = 1; pageIndex < pages.length; pageIndex += 1) {
+    const previousPage = pages[pageIndex - 1];
+    const currentPage = pages[pageIndex];
+    const previousContent =
+      previousPage?.querySelector<HTMLElement>(
+        ".pagedjs_page_content"
+      );
+    const currentContent =
+      currentPage?.querySelector<HTMLElement>(
+        ".pagedjs_page_content"
+      );
+    if (!previousContent || !currentContent) {
+      continue;
+    }
+
+    const mediaBlocks = Array.from(
+      currentContent.querySelectorAll<HTMLElement>(
+        "[data-media-backfill-id]"
+      )
+    ).sort(
+      (left, right) =>
+        left.getBoundingClientRect().top -
+        right.getBoundingClientRect().top
+    );
+    const block = mediaBlocks[0];
+    if (!block) {
+      continue;
+    }
+
+    const kind = getMediaKind(block);
+    const visual = kind ? getMediaVisual(block, kind) : undefined;
+    const id = block.dataset.mediaBackfillId;
+    const baselineVisualHeight = finitePositive(
+      block.dataset.mediaBaselineHeight
+    );
+    if (!kind || !visual || !id || !baselineVisualHeight) {
+      continue;
+    }
+
+    if (hasForcedBreakBefore(block)) {
+      continue;
+    }
+    const currentContentRect = currentContent.getBoundingClientRect();
+    const visualHeight = visual.getBoundingClientRect().height;
+    const mediaGroupTop = getMediaGroupTop(
+      block,
+      currentContentRect.top
+    );
+    const fixedHeight = Math.max(
+      0,
+      getOuterBottom(block) -
+        mediaGroupTop -
+        visualHeight
+    );
+
+    const previousContentRect =
+      previousContent.getBoundingClientRect();
+    const previousFlowBottom =
+      getLastContentBottom(previousContent);
+    const remainingHeight = Math.max(
+      0,
+      previousContentRect.bottom - previousFlowBottom
+    );
+    const scale = calculateMediaBackfillScale(
+      {
+        remainingHeight,
+        fixedHeight,
+        baselineVisualHeight
+      },
+      options
+    );
+    if (scale === undefined || candidateIds.has(id)) {
+      continue;
+    }
+    candidateIds.add(id);
+    candidates.push({ id, scale });
+  }
+
+  return candidates;
+}
+
+function setVisualSize(
+  visual: HTMLElement | SVGSVGElement,
+  width: number,
+  height: number
+) {
+  visual.style.setProperty("display", "block");
+  visual.style.setProperty("width", `${width}px`, "important");
+  visual.style.setProperty("height", `${height}px`, "important");
+  visual.style.setProperty("max-width", "100%", "important");
+  visual.style.setProperty("max-height", `${height}px`, "important");
+  visual.style.setProperty("margin-inline", "auto", "important");
+}
+
+export function applyMediaBackfillCandidates(
+  source: ParentNode,
+  candidates: MediaBackfillCandidate[]
+) {
+  let applied = 0;
+  for (const candidate of candidates) {
+    const block = Array.from(
+      source.querySelectorAll<HTMLElement>(
+        "[data-media-backfill-id]"
+      )
+    ).find(
+      (element) =>
+        element.dataset.mediaBackfillId === candidate.id
+    );
+    const kind = block ? getMediaKind(block) : undefined;
+    const baselineWidth = finitePositive(
+      block?.dataset.mediaBaselineWidth
+    );
+    const baselineHeight = finitePositive(
+      block?.dataset.mediaBaselineHeight
+    );
+    const visual =
+      block && kind ? getMediaVisual(block, kind) : undefined;
+    if (
+      !block ||
+      !kind ||
+      !visual ||
+      !baselineWidth ||
+      !baselineHeight ||
+      !Number.isFinite(candidate.scale) ||
+      candidate.scale <= 0 ||
+      candidate.scale >= 1
+    ) {
+      continue;
+    }
+
+    const width = baselineWidth * candidate.scale;
+    const height = baselineHeight * candidate.scale;
+    block.dataset.mediaBackfilled = "true";
+    block.dataset.mediaBackfillScale = String(candidate.scale);
+    setVisualSize(visual, width, height);
+
+    if (kind === "image") {
+      visual.style.setProperty("object-fit", "contain");
+    } else if (kind === "echarts") {
+      const svg = block.querySelector<SVGSVGElement>(
+        ".md-echarts-host svg"
+      );
+      if (svg) {
+        setVisualSize(svg, width, height);
+      }
+      visual.style.removeProperty("aspect-ratio");
+    }
+    applied += 1;
+  }
+  return applied;
+}
@@ -6,7 +6,7 @@ import {
  parseSvgViewBox,
  type DiagramDimensions,
  type DiagramPageFit
-} from "./diagram-page-fit";
+} from "./diagram-page-fit.js";

 export type MermaidDimensions = DiagramDimensions;
 export type MermaidPageFit = DiagramPageFit;
@@ -13,6 +13,7 @@ export interface PagedPreviewRenderRequest {
  scope: typeof PAGED_PREVIEW_MESSAGE_SCOPE;
  type: "render";
  requestId: number;
+  layout: "paged" | "continuous";
  payload: PagedPreviewPayload;
 }

@@ -21,15 +22,22 @@ export type PagedPreviewFrameMessage =
      scope: typeof PAGED_PREVIEW_MESSAGE_SCOPE;
      type: "ready";
    }
+  | {
+      scope: typeof PAGED_PREVIEW_MESSAGE_SCOPE;
+      type: "link";
+      href: string;
+    }
  | {
      scope: typeof PAGED_PREVIEW_MESSAGE_SCOPE;
      type: "rendering";
      requestId: number;
+      layout: "paged" | "continuous";
    }
  | {
      scope: typeof PAGED_PREVIEW_MESSAGE_SCOPE;
      type: "rendered";
      requestId: number;
+      layout: "paged" | "continuous";
      pageCount: number;
      contentHeight: number;
      echartsErrors: string[];
@@ -67,6 +75,35 @@ svg {
  max-width: 100%;
 }

+#write pre.md-fences,
+#write .md-code-pagination-chunk {
+  min-width: 0;
+  max-width: 100%;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+  word-break: break-word;
+}
+
+#write pre.md-fences > code,
+#write .md-code-pagination-chunk > code {
+  display: block;
+  min-width: 0;
+  max-width: 100%;
+  padding: 0;
+  padding-left: 8px;
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+  font-family: inherit;
+  font-size: inherit;
+  font-weight: inherit;
+  line-height: inherit;
+  white-space: inherit;
+  overflow-wrap: inherit;
+  word-break: inherit;
+}
+
 .md-document-image-block {
  break-inside: avoid;
  page-break-inside: avoid;
@@ -133,6 +170,60 @@ body,
 }
 `;

+export const documentInteractionCss = `
+:where(#write a[href]) {
+  color: var(--md-link-color, var(--md-accent, #0969da));
+  text-decoration-line: underline;
+  text-decoration-thickness: 0.08em;
+  text-underline-offset: 0.16em;
+  cursor: pointer;
+}
+
+:where(#write a[href]:hover) {
+  color: var(--md-link-hover-color, #0550ae);
+}
+
+:where(#write a[href]:focus-visible) {
+  border-radius: 2px;
+  outline: 2px solid currentColor;
+  outline-offset: 2px;
+}
+`;
+
+export const continuousDocumentGeometryCss = `
+html,
+body,
+#preview-root {
+  height: auto !important;
+  min-height: 0 !important;
+  overflow: hidden !important;
+  background: transparent !important;
+}
+
+#preview-root {
+  padding: 34px 0;
+}
+
+#write {
+  width: 100% !important;
+  max-width: none !important;
+  height: auto !important;
+  min-height: 0 !important;
+  margin: 0 !important;
+  padding: 16mm !important;
+  background: #fff;
+  box-shadow: 0 3px 16px rgb(34 43 38 / 16%);
+}
+
+#write[data-continuous-render-stage="true"] {
+  position: fixed !important;
+  inset: 0 auto auto 0 !important;
+  z-index: -1 !important;
+  visibility: hidden !important;
+  pointer-events: none !important;
+}
+`;
+
 function cssString(value: string) {
  return JSON.stringify(value)
    .replace(/\u2028/g, "\\2028 ")
@@ -174,6 +265,9 @@ export function formatPageNumber(
  if (config.format === "dash-page") {
    return `- ${page} -`;
  }
+  if (config.format === "official-page") {
+    return `— ${page} —`;
+  }

  return (config.template || "${page} / ${pages}")
    .replace(/\$\{page\}/g, String(page))
@@ -186,6 +280,7 @@ function marginBox(
  content: string,
  options: {
    color: string;
+    fontFamily: string;
    fontSize: string;
    height: string;
    showDivider: boolean;
@@ -204,7 +299,7 @@ function marginBox(
    content: ${content};
    height: ${options.height};
    color: ${options.color};
-    font-family: inherit;
+    font-family: ${options.fontFamily};
    font-size: ${options.fontSize};
    font-weight: 400;
    line-height: 1.25;
@@ -224,6 +319,7 @@ function buildHeaderCss(

  const options = {
    color: config.header.color,
+    fontFamily: config.header.fontFamily,
    fontSize: config.header.fontSize,
    height: config.header.height,
    showDivider: config.header.showDivider
@@ -252,6 +348,7 @@ function buildFooterCss(config: ExportConfig) {

  const options = {
    color: config.footer.color,
+    fontFamily: config.footer.fontFamily,
    fontSize: config.footer.fontSize,
    height: config.footer.height,
    showDivider: config.footer.showDivider
@@ -271,6 +368,23 @@ function buildFooterCss(config: ExportConfig) {
    .join("\n");
 }

+export function resolvePageNumberAlignment(
+  config: ExportConfig["footer"],
+  pageIndex: number
+): "left" | "center" | "right" {
+  if (config.alignment !== "outer") {
+    return config.alignment;
+  }
+  return pageIndex % 2 === 0 ? "right" : "left";
+}
+
+export function shouldRenderPageNumber(
+  config: ExportConfig["footer"],
+  pageIndex: number
+) {
+  return config.showOnFirstPage || pageIndex !== 0;
+}
+
 export function buildPagedMediaCss(
  config: ExportConfig,
  payload: Pick<PagedPreviewPayload, "fileName" | "metadata">
@@ -322,6 +436,47 @@ ${buildFooterCss(config)}
  break-inside: avoid;
 }

+#write .md-code-pagination-chunk {
+  break-inside: avoid;
+  page-break-inside: avoid;
+}
+
+#write .md-code-pagination-chunk > code {
+  display: block;
+}
+
+#write .md-code-pagination-chunk:not(
+  [data-code-pagination-position="first"]
+):not([data-code-pagination-position="only"]) {
+  margin-top: 0 !important;
+  padding-top: 0 !important;
+  border-top: 0 !important;
+  border-top-left-radius: 0 !important;
+  border-top-right-radius: 0 !important;
+}
+
+#write .md-code-pagination-chunk:not(
+  [data-code-pagination-position="last"]
+):not([data-code-pagination-position="only"]) {
+  margin-bottom: 0 !important;
+  padding-bottom: 0 !important;
+  border-bottom: 0 !important;
+  border-bottom-left-radius: 0 !important;
+  border-bottom-right-radius: 0 !important;
+}
+
+#write .md-code-line-group {
+  display: block;
+}
+
+#write .md-code-line {
+  display: block;
+  min-height: 1lh;
+  white-space: inherit;
+  overflow-wrap: inherit;
+  word-break: inherit;
+}
+
 #write table[data-empty-split-table="true"] {
  display: none;
 }
@@ -398,12 +553,14 @@ html[data-render-target="pdf"] .pagedjs_page {

 export function createPagedPreviewRenderRequest(
  requestId: number,
-  payload: PagedPreviewPayload
+  payload: PagedPreviewPayload,
+  layout: "paged" | "continuous" = "paged"
 ): PagedPreviewRenderRequest {
  return {
    scope: PAGED_PREVIEW_MESSAGE_SCOPE,
    type: "render",
    requestId,
+    layout,
    payload
  };
 }
@@ -420,6 +577,8 @@ export function isPagedPreviewRenderRequest(
    candidate.scope === PAGED_PREVIEW_MESSAGE_SCOPE &&
    candidate.type === "render" &&
    Number.isInteger(candidate.requestId) &&
+    (candidate.layout === "paged" ||
+      candidate.layout === "continuous") &&
    Boolean(candidate.payload) &&
    typeof candidate.payload?.articleHtml === "string" &&
    typeof candidate.payload?.themeCss === "string"
@@ -436,24 +595,54 @@ export function isPagedPreviewFrameMessage(
  const candidate = value as Partial<PagedPreviewFrameMessage>;
  if (
    candidate.scope !== PAGED_PREVIEW_MESSAGE_SCOPE ||
-    !["ready", "rendering", "rendered", "error"].includes(
+    !["ready", "link", "rendering", "rendered", "error"].includes(
      candidate.type ?? ""
    )
  ) {
    return false;
  }

-  if (candidate.type !== "rendered") {
+  if (candidate.type === "ready") {
    return true;
  }

+  if (candidate.type === "link") {
+    return (
+      typeof candidate.href === "string" &&
+      candidate.href.trim().length > 0
+    );
+  }
+
+  if (candidate.type === "rendering") {
+    return (
+      Number.isInteger(candidate.requestId) &&
+      (candidate.layout === "paged" ||
+        candidate.layout === "continuous")
+    );
+  }
+
+  if (candidate.type === "error") {
+    return (
+      Number.isInteger(candidate.requestId) &&
+      typeof candidate.message === "string"
+    );
+  }
+
+  if (candidate.type !== "rendered") {
+    return false;
+  }
+  const rendered = candidate as Partial<
+    Extract<PagedPreviewFrameMessage, { type: "rendered" }>
+  >;
  return (
-    Number.isInteger(candidate.requestId) &&
-    Number.isInteger(candidate.pageCount) &&
-    typeof candidate.contentHeight === "number" &&
-    Number.isFinite(candidate.contentHeight) &&
-    candidate.contentHeight > 0 &&
-    Array.isArray(candidate.echartsErrors) &&
-    Array.isArray(candidate.mermaidErrors)
+    Number.isInteger(rendered.requestId) &&
+    (rendered.layout === "paged" ||
+      rendered.layout === "continuous") &&
+    Number.isInteger(rendered.pageCount) &&
+    typeof rendered.contentHeight === "number" &&
+    Number.isFinite(rendered.contentHeight) &&
+    rendered.contentHeight > 0 &&
+    Array.isArray(rendered.echartsErrors) &&
+    Array.isArray(rendered.mermaidErrors)
  );
 }
@@ -1,5 +1,5 @@
 import { Handler, registerHandlers } from "pagedjs";
-import { resolveBreakTokenElement } from "./paged-break-token";
+import { resolveBreakTokenElement } from "./paged-break-token.js";

 interface PagedBreakToken {
  node?: Node;
@@ -0,0 +1,78 @@
+declare module "pagedjs" {
+  export interface PagedBreakToken {
+    node?: Node;
+    offset?: number;
+  }
+
+  export interface PagedPage {
+    element: HTMLElement;
+    startToken?: PagedBreakToken;
+    endToken?: PagedBreakToken;
+    destroy(): void;
+  }
+
+  export interface PagedFlow {
+    total: number;
+    pages: PagedPage[];
+    performance: number;
+    size: {
+      width: { value: number; unit: string };
+      height: { value: number; unit: string };
+      format?: string;
+      orientation?: string;
+    };
+  }
+
+  export type PagedStylesheet = string | Record<string, string>;
+
+  export class Previewer {
+    chunker: {
+      source: DocumentFragment;
+      pages: PagedPage[];
+      total: number;
+      rendered: boolean;
+      pagesArea: HTMLElement;
+      hooks: {
+        afterParsed: {
+          trigger(
+            parsed: DocumentFragment,
+            chunker: unknown
+          ): Promise<void>;
+        };
+        afterRendered: {
+          trigger(
+            pages: PagedPage[],
+            chunker: unknown
+          ): Promise<void>;
+        };
+      };
+      loadFonts(): Promise<void>;
+      removePages(fromIndex?: number): void;
+      render(
+        parsed: DocumentFragment,
+        startAt?: PagedBreakToken
+      ): Promise<{ done: boolean; canceled?: boolean }>;
+      destroy(): void;
+    };
+    polisher: {
+      destroy(): void;
+    };
+    preview(
+      content?: HTMLElement | DocumentFragment | string,
+      stylesheets?: PagedStylesheet[],
+      renderTo?: HTMLElement | string
+    ): Promise<PagedFlow>;
+  }
+
+  export class Handler {
+    constructor(
+      chunker: unknown,
+      polisher: unknown,
+      caller: unknown
+    );
+  }
+
+  export function registerHandlers(
+    ...handlers: Array<typeof Handler>
+  ): void;
+}
@@ -0,0 +1,20 @@
+import { encodeLocalDocumentLinkForPdf } from "@md-to-pdf/core";
+
+export function preparePdfDocumentLinks(root: ParentNode) {
+  let rewritten = 0;
+  for (const link of root.querySelectorAll<HTMLAnchorElement>(
+    "a[href]"
+  )) {
+    const href = link.getAttribute("href");
+    if (!href) {
+      continue;
+    }
+    const encoded = encodeLocalDocumentLinkForPdf(href);
+    if (!encoded) {
+      continue;
+    }
+    link.setAttribute("href", encoded);
+    rewritten += 1;
+  }
+  return rewritten;
+}
@@ -0,0 +1,141 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+import { prepareCodeBlockPagination } from "../src/code-block-pagination.js";
+
+function createRoot(codeHtml: string) {
+  const root = document.createElement("article");
+  root.innerHTML = `<pre class="md-fences"><code>${codeHtml}</code></pre>`;
+  return root;
+}
+
+function getGroups(root: ParentNode) {
+  return Array.from(
+    root.querySelectorAll<HTMLElement>(".md-code-line-group")
+  );
+}
+
+function getLines(root: ParentNode) {
+  return Array.from(
+    root.querySelectorAll<HTMLElement>(".md-code-line")
+  );
+}
+
+function getChunks(root: ParentNode) {
+  return Array.from(
+    root.querySelectorAll<HTMLElement>(".md-code-pagination-chunk")
+  );
+}
+
+describe("代码块分页预处理", () => {
+  it("偶数行按两行分组", () => {
+    const root = createRoot("line-1\nline-2\nline-3\nline-4\n");
+
+    prepareCodeBlockPagination(root);
+
+    expect(getGroups(root).map((group) => group.children.length)).toEqual([
+      2,
+      2
+    ]);
+    expect(getLines(root).map((line) => line.textContent)).toEqual([
+      "line-1",
+      "line-2",
+      "line-3",
+      "line-4"
+    ]);
+    expect(
+      getChunks(root).map((chunk) =>
+        chunk.getAttribute("data-code-pagination-position")
+      )
+    ).toEqual(["first", "last"]);
+  });
+
+  it("奇数行将最后三行合组并保留单行代码块", () => {
+    const oddRoot = createRoot(
+      "line-1\nline-2\nline-3\nline-4\nline-5\n"
+    );
+    const singleRoot = createRoot("only-line\n");
+
+    prepareCodeBlockPagination(oddRoot);
+    prepareCodeBlockPagination(singleRoot);
+
+    expect(
+      getGroups(oddRoot).map((group) => group.children.length)
+    ).toEqual([2, 3]);
+    expect(
+      getGroups(singleRoot).map((group) => group.children.length)
+    ).toEqual([1]);
+    expect(
+      getChunks(singleRoot)[0]?.getAttribute(
+        "data-code-pagination-position"
+      )
+    ).toBe("only");
+  });
+
+  it("跨行克隆语法高亮结构并保留空行", () => {
+    const root = createRoot(
+      '<span class="hljs-string">first\nsecond</span>\n\n' +
+        '<span class="hljs-keyword">return</span> value;\n'
+    );
+
+    prepareCodeBlockPagination(root);
+
+    const lines = getLines(root);
+    expect(lines.map((line) => line.textContent)).toEqual([
+      "first",
+      "second",
+      "",
+      "return value;"
+    ]);
+    expect(
+      lines[0]?.querySelector(".hljs-string")?.textContent
+    ).toBe("first");
+    expect(
+      lines[1]?.querySelector(".hljs-string")?.textContent
+    ).toBe("second");
+    expect(
+      lines[3]?.querySelector(".hljs-keyword")?.textContent
+    ).toBe("return");
+  });
+
+  it("重复调用不会再次包装已经准备的代码块", () => {
+    const root = createRoot("line-1\nline-2\n");
+
+    prepareCodeBlockPagination(root);
+    const firstHtml = root.innerHTML;
+    prepareCodeBlockPagination(root);
+
+    expect(root.innerHTML).toBe(firstHtml);
+    expect(root.querySelector("pre.md-fences")).toBeNull();
+    const paginationChunks = getChunks(root);
+    expect(paginationChunks).toHaveLength(1);
+    expect(
+      paginationChunks[0]?.classList.contains("md-fences")
+    ).toBe(true);
+    expect(
+      paginationChunks[0]?.getAttribute(
+        "data-code-pagination-prepared"
+      )
+    ).toBe("true");
+  });
+
+  it("复制代码元素属性并把每个双行组拆成同级分页片段", () => {
+    const root = document.createElement("article");
+    root.innerHTML =
+      '<pre class="md-fences custom" data-source="demo">' +
+      '<code class="hljs language-js" data-language="js">' +
+      "line-1\nline-2\nline-3\nline-4\n" +
+      "</code></pre>";
+
+    prepareCodeBlockPagination(root);
+
+    const chunks = getChunks(root);
+    expect(chunks).toHaveLength(2);
+    expect(Array.from(root.children)).toEqual(chunks);
+    expect(chunks[0]?.classList.contains("custom")).toBe(true);
+    expect(chunks[1]?.getAttribute("data-source")).toBe("demo");
+    expect(
+      chunks[1]?.querySelector("code")?.getAttribute("data-language")
+    ).toBe("js");
+  });
+});
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
SkyJourney	83e6559c2c	release: 发布 v0.5.1 新增能力：内置 4 套红头、3 套正式文档和 3 套标书主题，支持主题推荐页边距、页面装饰、页眉页脚和页码；增加结构化公文、项目报告及标书 Front Matter，内置 Fandol 中文字体、两份教程和 14 份主题示例。桌面工作流：重组更多菜单，增加新建、保存、另存为快捷键和未保存确认；另存为后跟随新路径，主题示例自动切换主题，Desktop 发行包完整携带教程、示例与字体。问题修复：修正红头标题居中与正式文档字体；围栏代码按正文宽度自动换行，长内容安全断行，至少两行即可在当前页分页，并统一保留 8px 左侧内容留白；Docker Web 镜像正确打包 samples。兼容与部署：未声明主题推荐设置时继续使用 16mm 默认页边距；Web 隐藏不适用的另存为。正式镜像 yixiong/md-to-pdf:v0.5.1 内容 ID 为 sha256:72f519a69bfd6cb2f6df30c2be938e58ceb6f20e4748a32551874de3d436b276，Compose 健康运行。验证结果：最终修复前 65 个测试文件、286 项测试通过，最终代码块与主题定向测试 27 项通过；全项目类型检查、生产构建和 git diff --check 通过。容器检出 14 套主题、17 份 Markdown，代码块回归 PDF 为 2 页且无越界。NSIS SHA-256 为 676CCE73D782B0B15AC6BC68F253CFBC4740383583E4DAA98F746EDF9999C5CC，ZIP SHA-256 为 82BF6ADF1200604F145CC86FA3ED193955CF6741EBEE3DF8953483515CFF621F。	2026-07-29 16:58:17 +08:00
SkyJourney	58087d0c7e	release: 发布 v0.5.0 新增共享 Preview Engine，统一 Web 连续预览、快速分页、Playwright PDF 与 Electron PDF；实现稳定前缀复用和修改位置后的增量分页，保留媒体块按文档顺序串行回填与单次重排。完善跨端链接与桌面文档工作流：Web 受控处理锚点和 HTTP/HTTPS 外链；Desktop 支持本地路径、file URI、系统协议、多窗口、同文件单例、Markdown 当前或新窗口打开，以及聚焦时外部文件变化提示。统一四套内置主题名称并默认使用 Typora Github；修复连续预览双滚动条、ECharts 尺寸、PDF 本地链接、围栏代码块 Typora DOM 与重复行内样式；桌面发行链强制完整重建内嵌 Web，避免安装包携带陈旧资源。发布 Web/Compose 与 Windows NSIS/ZIP：镜像 yixiong/md-to-pdf:v0.5.0 已健康部署；NSIS SHA-256 为 60992D1FDCA513F46346C78478537EB4159D8C0E76B41ECF3CDC25BE77707D92，ZIP SHA-256 为 D74F82293FB67126E583546CBA894569EFC9A0B1B6343FAC648CCC95F1D188D8，本机安装版已升级至 v0.5.0。验证：全项目 238 项测试通过，类型检查、生产构建和 git diff --check 通过；Web 快速/连续/精确预览、Compose、Desktop 多窗口、窗口状态、文件关联、链接与代码块均完成真实环境验收。	2026-07-28 18:01:22 +08:00
SkyJourney	925b0d1485	release: 发布 v0.4.5 新增能力：Web 与 Desktop 支持新建和保存 Markdown；桌面端注册 .md/.markdown 打开程序，支持单实例文件转交、自定义主题目录以及窗口位置、尺寸和最大化状态的延迟原子持久化与屏幕越界修正。界面与兼容性：保留打开 Markdown 为独立主操作，将新建、保存和主题目录收纳到更多菜单；Web 移除本地素材目录入口并明确默认不支持本地素材；新文档默认使用一级标题或首行合法化生成文件名，可不保存直接导出 PDF。渲染修复：图片、Mermaid 和 ECharts 按文档顺序串行执行媒体分页回填，每个媒体元素至多重排一次；图片以限宽后的高度作为缩放基准，只缩放媒体主体并保持标题尺寸；ECharts 冻结为 SVG 图片后参与统一分页。示例与文档：默认示例仅保留一张网络图片，增加有效 Base64 横图、竖图、边界图片及多尺寸 Mermaid/ECharts；更新根 README、Desktop README、部署文档、四个 packages README、PROGRESS 和 AGENTS 发布规范；登记 v0.4.6 超链接导航问题。部署与验证：构建并运行 yixiong/md-to-pdf:v0.4.5 正式镜像，Compose 健康且 PDF 冒烟无 Mermaid/ECharts 错误；生成 NSIS 安装包和免安装 ZIP，本机已升级到 NSIS v0.4.5 并清理旧 Squirrel 安装；202 项测试、类型检查、生产构建和 git diff --check 全部通过。发布产物：Setup.exe SHA-256 9CBD6362E15AA745185805E753D5A7749434E0E142E6CE0F66463E6A19468F1D；ZIP SHA-256 97B2D44E72F626A3396E5AB5B330FFB7F9BECAF945A1707808C876940A82E850；当前 Windows 产物未配置代码签名。	2026-07-28 13:31:42 +08:00
SkyJourney	ac54ce46be	chore: 精简桌面端语言包	2026-07-27 23:16:47 +08:00