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。

.gitignore

@@ -9,6 +9,7 @@ coverage/
 Thumbs.db
 .idea/
 .vscode/
+.serena/
 tmp/
 playwright-report/
 test-results/

AGENTS.md

@@ -80,6 +80,7 @@ flowchart LR
 - 应用服务：`packages/application`。
 - 共享模型：`packages/core`。
 - Markdown 渲染：`packages/renderer`。
+- 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。
@@ -102,6 +103,7 @@ 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
 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

README.md

@@ -4,23 +4,27 @@
 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。
 
-当前版本：`v0.4.5`。
+当前版本：`v0.5.0`。
 
-## v0.4.5 主要能力
+## v0.5.0 主要能力
 
-- 新建、打开和保存 Markdown；新文档可直接导出 PDF；
+- 新增“连续”预览模式：不分页、低测量开销，适合编辑时快速刷新；快速
-- Windows 注册 `.md`、`.markdown` 文件关联，系统打开文件时自动加载；
+  预览继续提供分页近似，精确预览和导出 PDF 保持权威分页；
-- 桌面窗口位置、尺寸和最大化状态延迟持久化，并在多显示器变化后自动
+- 分页引擎从 Web 应用抽取为 `@md-to-pdf/preview-engine`，Web、
-  修正到可见工作区；
+  Playwright PDF 与 Electron PDF 直接复用同一运行时；
-- “打开 Markdown”保留为独立主按钮，新建、保存和主题目录收纳在“更多”
+- 快速预览支持按修改位置复用稳定前缀，只重新分页受影响的后缀；
-  菜单；
+- Web 链接只处理当前文档锚点和 HTTP/HTTPS 外链；外链在新浏览器窗口
-- 桌面端提供可直接放置自定义主题的本地目录；
+  打开，本地路径及不支持协议不执行导航；
-- 图片、Mermaid 和 ECharts 采用串行媒体分页：每个媒体块至多重排一次，
+- Desktop 支持 HTTP/HTTPS、系统协议、本地相对或绝对路径和 `file:`
-  严格保持文档顺序；
+  URI；Markdown 链接可选择在当前窗口或新窗口打开；
-- 媒体先按内容限宽计算基准高度。当上一页空白接近媒体所需空间时，允许
+- Desktop 支持多窗口和同一文件单例。窗口聚焦时检查磁盘文件变化，并
-  将媒体内容等比例缩小回填；图片标题或图表标题保持原字号且与媒体成块；
+  提示是否重新加载；
-- 示例文档覆盖横图、竖图、Base64 图片、Mermaid、ECharts 以及不同尺寸
+- 四个内置主题统一命名为 Typora Github、Typora Pixyll、
-  的分页边界。
+  Typora whitey 和 Typora Clean，默认使用 Typora Github；
+- 围栏代码块输出 Typora 兼容的 `.md-fences` DOM，并避免内部
+  `<code>` 重复套用行内代码样式；
+- 桌面发行链会在每次打包前完整重建内嵌 Web 依赖，避免安装包携带陈旧
+  前端资源。
 
 ## Web 与桌面端
 
@@ -30,6 +34,11 @@
 | 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 Markdown | 浏览器下载 | 原生另存为 |
 | 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 |
@@ -44,16 +53,18 @@ 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["共享分页运行时"]
+    C --> E["共享 Preview Engine"]
-    E --> F["Web 快速预览"]
+    E --> F["连续预览"]
-    E --> G["Playwright Chromium"]
+    E --> G["快速分页预览"]
-    E --> H["Electron Chromium"]
+    E --> H["Playwright Chromium"]
-    G --> I["Web PDF"]
+    E --> I["Electron Chromium"]
-    H --> J["Desktop PDF"]
+    H --> J["Web PDF"]
+    I --> K["Desktop PDF"]
 ```
 
-快速预览适合编辑反馈；精确预览直接展示服务端生成的 PDF，是 Web 最终
+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
-分页的权威结果。桌面 PDF 复用相同分页载荷和运行时。
+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
 
@@ -67,6 +78,7 @@ packages/
   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
@@ -75,9 +87,10 @@ 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；`markdown-echarts` 提供独立图表
+包依赖保持单向：`core` 提供基础协议和链接分类；`markdown-echarts`
-能力；`renderer` 消费两者生成安全 HTML；`application` 组合渲染器、主题
+提供独立图表能力；`renderer` 消费两者生成安全 HTML；`application`
-和资源用例；三个 `apps/*` 只负责各自平台的界面、传输与 PDF 适配。
+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：
 
@@ -85,6 +98,7 @@ logos/                  应用图标源文件
 - [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
 
@@ -114,8 +128,9 @@ npm run desktop:package
 npm run make -w @md-to-pdf/desktop
 ```
 
-产物位于 `apps/desktop/out/v0.4.5/`。正式安装包命名为
+桌面 `package` 和 `make` 会先完整重建内嵌 Web 及全部共享依赖，不能
-`md-to-pdf-0.4.5-x86_64-Setup.exe`，同时生成免安装 ZIP；当前发行包
+复用陈旧的 `apps/web/dist`。产物位于 `apps/desktop/out/v0.5.0/`。
+正式安装包命名为 `md-to-pdf-0.5.0-x86_64-Setup.exe`，同时生成免安装 ZIP；当前发行包
 未配置代码签名。
 
 ## 文档与媒体
@@ -134,8 +149,9 @@ ECharts 围栏语法、支持系列和安全边界详见
 
 ## 主题
 
-仓库内置 Typora 风格、GitHub、Pixyll 和 Whitey 四套主题。主题由
+仓库内置 Typora Github、Typora Pixyll、Typora whitey 和
-版本化 `theme.json` 清单、主体 CSS、可选基础 CSS、打印 CSS 和资源组成。
+Typora Clean 四套主题，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；

apps/desktop/README.md

@@ -8,7 +8,11 @@ preload、进程内应用服务、原生 Markdown 打开与保存、同目录图
 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”会复用已有应用窗口并加载文档。
+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；新建文档、保存 Markdown 和打开
 自定义主题目录收纳在“更多”菜单中。新建文档未保存时显示“未命名文档”，
@@ -36,9 +40,13 @@ 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/v0.4.5/`。该目录被 Git 忽略。公司内部分发以
+`apps/desktop/out/v0.5.0/`。该目录被 Git 忽略。公司内部分发以
-`md-to-pdf-0.4.5-x86_64-Setup.exe` 为正式安装包，ZIP 作为免安装
+`md-to-pdf-0.5.0-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。
 
@@ -57,6 +65,16 @@ 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。
 

apps/desktop/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@md-to-pdf/desktop",
-  "version": "0.4.5",
+  "version": "0.5.0",
   "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",
+    "package": "npm run build:embedded-web && 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",
+    "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"
   },

apps/desktop/src/app-preload.ts

@@ -9,10 +9,12 @@ import {
   DESKTOP_LIST_THEMES,
   DESKTOP_MARKDOWN_OPENED,
   DESKTOP_OPEN_MARKDOWN,
+  DESKTOP_OPEN_DOCUMENT_LINK,
   DESKTOP_OPEN_THEME_DIRECTORY,
   DESKTOP_REFRESH_THEMES,
   DESKTOP_RENDER_MARKDOWN,
   DESKTOP_SAVE_MARKDOWN,
+  DESKTOP_SET_DOCUMENT_DIRTY,
   DESKTOP_START_NEW_MARKDOWN,
   DESKTOP_SAVE_PDF
 } from "./channels.js";
@@ -23,14 +25,23 @@ contextBridge.exposeInMainWorld("mdToPdfDesktop", {
     ipcRenderer.invoke(DESKTOP_CONSUME_PENDING_MARKDOWN),
   discardPendingMarkdown: () =>
     ipcRenderer.invoke(DESKTOP_DISCARD_PENDING_MARKDOWN),
-  onMarkdownOpened: (listener: () => void) => {
+  onMarkdownOpened: (
-    const handleOpened = () => listener();
+    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),
+  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),
   openThemeDirectory: () =>

apps/desktop/src/channels.ts

@@ -8,6 +8,10 @@ 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_SAVE_MARKDOWN =

apps/desktop/src/desktop-application-controller.ts

@@ -0,0 +1,925 @@
+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_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_SAVE_MARKDOWN,
+  DESKTOP_SAVE_PDF,
+  DESKTOP_SET_DOCUMENT_DIRTY,
+  DESKTOP_START_NEW_MARKDOWN
+} 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";
+
+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;
+  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) {
+    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,
+      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();
+    });
+    await window.loadURL(this.#applicationUrl);
+    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) => {
+      if (!session.dirty || session.allowClose) {
+        return;
+      }
+      event.preventDefault();
+      void this.#confirmDirtyWindowClose(session);
+    });
+    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 #confirmDirtyWindowClose(session: WindowSession) {
+    if (session.window.isDestroyed()) {
+      return;
+    }
+    const result = await dialog.showMessageBox(session.window, {
+      type: "warning",
+      title: "关闭未保存文档",
+      message: "当前文档有未保存修改，确定要关闭窗口吗？",
+      detail: "关闭后，尚未保存的修改将会丢失。",
+      buttons: ["取消", "仍然关闭"],
+      defaultId: 0,
+      cancelId: 0,
+      noLink: true
+    });
+    session.suppressFocusCheckUntil =
+      Date.now() + FOCUS_CHECK_SUPPRESSION_MS;
+    if (result.response === 1 && !session.window.isDestroyed()) {
+      session.allowClose = true;
+      session.window.close();
+    }
+  }
+
+  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_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;
+      }
+    );
+
+    ipcMain.handle(
+      DESKTOP_SAVE_MARKDOWN,
+      async (
+        event,
+        unsafeFileName: unknown,
+        unsafeMarkdown: unknown
+      ) => {
+        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 (!targetPath) {
+          const suggestedName = /\.(?:md|markdown)$/iu.test(
+            path.basename(unsafeFileName)
+          )
+            ? path.basename(unsafeFileName)
+            : `${path.basename(unsafeFileName)}.md`;
+          const selection = await dialog.showSaveDialog(session.window, {
+            title: "保存 Markdown",
+            defaultPath: path.join(
+              app.getPath("documents"),
+              suggestedName
+            ),
+            filters: [
+              {
+                name: "Markdown 文件",
+                extensions: ["md", "markdown"]
+              }
+            ]
+          });
+          if (selection.canceled || !selection.filePath) {
+            return undefined;
+          }
+          targetPath = /\.(?:md|markdown)$/iu.test(selection.filePath)
+            ? selection.filePath
+            : `${selection.filePath}.md`;
+        }
+
+        let targetKey = createMarkdownDocumentKey(
+          path.resolve(targetPath)
+        );
+        try {
+          targetKey = createMarkdownDocumentKey(
+            await realpath(targetPath)
+          );
+        } catch (error) {
+          if (
+            !(
+              error instanceof Error &&
+              "code" in error &&
+              error.code === "ENOENT"
+            )
+          ) {
+            throw error;
+          }
+        }
+        const existing = this.#findDocumentSession(targetKey);
+        if (existing && existing !== session) {
+          focusWindow(existing.window);
+          throw new Error("该 Markdown 已在另一个窗口中打开");
+        }
+
+        await writeFile(targetPath, unsafeMarkdown, "utf8");
+        const snapshot = await readMarkdownFileSnapshot(
+          targetPath,
+          MAXIMUM_MARKDOWN_LENGTH
+        );
+        const canonicalExisting = this.#findDocumentSession(
+          snapshot.documentKey
+        );
+        if (canonicalExisting && canonicalExisting !== session) {
+          focusWindow(canonicalExisting.window);
+          throw new Error("该 Markdown 已在另一个窗口中打开");
+        }
+        this.#commitSnapshot(session, snapshot);
+        return { fileName: snapshot.document.fileName };
+      }
+    );
+
+    ipcMain.handle(DESKTOP_OPEN_THEME_DIRECTORY, async (event) => {
+      this.#getSession(event);
+      await mkdir(this.#themeDirectory, { recursive: true });
+      const errorMessage = await shell.openPath(this.#themeDirectory);
+      if (errorMessage) {
+        throw new Error(
+          `无法打开自定义主题目录：${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}`);
+    }
+  }
+}

apps/desktop/src/desktop-document-link.ts

@@ -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)
+  };
+}

apps/desktop/src/main.ts

@@ -1,79 +1,32 @@
 import {
   app,
-  BrowserWindow,
-  dialog,
-  ipcMain,
   Menu,
   net,
   protocol,
-  screen,
+  session
-  session,
-  shell,
-  type IpcMainInvokeEvent
 } from "electron";
-import {
+import { access, mkdir } from "node:fs/promises";
-  access,
-  mkdir,
-  writeFile
-} from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
 import {
   createApplicationService,
-  MAXIMUM_MARKDOWN_LENGTH,
   type ApplicationService
 } from "@md-to-pdf/application";
+import { parseThemeResourceUrl } from "./application-contract.js";
 import {
-  DESKTOP_CONSUME_PENDING_MARKDOWN,
+  DesktopApplicationController
-  DESKTOP_DISCARD_PENDING_MARKDOWN,
+} from "./desktop-application-controller.js";
-  DESKTOP_GET_THEME_CSS,
+import { DESKTOP_PDF_PARTITION } from "./electron-pdf-generator.js";
-  DESKTOP_GENERATE_PDF,
-  DESKTOP_LIST_THEMES,
-  DESKTOP_MARKDOWN_OPENED,
-  DESKTOP_OPEN_MARKDOWN,
-  DESKTOP_OPEN_THEME_DIRECTORY,
-  DESKTOP_REFRESH_THEMES,
-  DESKTOP_RENDER_MARKDOWN,
-  DESKTOP_SAVE_MARKDOWN,
-  DESKTOP_SAVE_PDF,
-  DESKTOP_START_NEW_MARKDOWN
-} from "./channels.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";
 import {
   findMarkdownFileArgument,
-  isMarkdownFilePath,
+  isMarkdownFilePath
-  readMarkdownDocument,
-  type OpenedMarkdownDocument
 } from "./markdown-file.js";
-import {
-  loadWindowState,
-  resolveWindowBounds,
-  saveWindowState,
-  type WindowState
-} from "./window-state.js";
 
 const APP_SCHEME = "mdpdf";
 const APP_HOST = "bundle";
 const THEME_HOST = "theme";
 const currentDirectory = path.dirname(fileURLToPath(import.meta.url));
-const DEFAULT_WINDOW_SIZE = { width: 1440, height: 960 };
+let applicationController: DesktopApplicationController | undefined;
-const MINIMUM_WINDOW_SIZE = { width: 1024, height: 720 };
-let applicationController:
-  | {
-      window: BrowserWindow;
-      openMarkdownFile(filePath: string): Promise<void>;
-      flushWindowState(): Promise<void>;
-    }
-  | undefined;
 let pendingExternalMarkdownPath = findMarkdownFileArgument(
   process.argv,
   process.cwd()
@@ -130,29 +83,16 @@ function encodeThemeAssetPath(assetPath: string) {
     .join("/");
 }
 
-function focusApplicationWindow() {
-  const window = applicationController?.window;
-  if (!window || window.isDestroyed()) {
-    return;
-  }
-  if (window.isMinimized()) {
-    window.restore();
-  }
-  window.show();
-  window.focus();
-}
-
 function dispatchExternalMarkdown(filePath: string) {
   if (!applicationController) {
     pendingExternalMarkdownPath = filePath;
     return;
   }
-  void applicationController.openMarkdownFile(filePath).catch(
+  void applicationController.openExternalMarkdown(filePath).catch(
     (error: unknown) => {
       console.warn("无法打开系统传入的 Markdown 文件", error);
     }
   );
-  focusApplicationWindow();
 }
 
 function getDesktopThemeDirectory() {
@@ -226,12 +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 {
@@ -248,376 +186,6 @@ 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 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 windowStatePath = path.join(
-    app.getPath("userData"),
-    "window-state.json"
-  );
-  const savedWindowState = await loadWindowState(windowStatePath);
-  const primaryWorkArea = screen.getPrimaryDisplay().workArea;
-  const initialBounds = resolveWindowBounds(
-    savedWindowState?.bounds,
-    screen.getAllDisplays().map((display) => display.workArea),
-    primaryWorkArea,
-    DEFAULT_WINDOW_SIZE,
-    MINIMUM_WINDOW_SIZE
-  );
-
-  const window = new BrowserWindow({
-    title: `Markdown PDF 导出器 v${app.getVersion()}`,
-    icon: getApplicationIcon(),
-    ...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: path.join(currentDirectory, "app-preload.cjs")
-    }
-  });
-  let saveWindowStateTimer: NodeJS.Timeout | undefined;
-  let pendingWindowStateWrite = Promise.resolve();
-  let latestWindowState: WindowState = {
-    version: 1,
-    bounds: window.getNormalBounds(),
-    maximized: window.isMaximized()
-  };
-  const captureWindowState = () => {
-    if (window.isDestroyed()) {
-      return;
-    }
-    latestWindowState = {
-      version: 1,
-      bounds: window.getNormalBounds(),
-      maximized: window.isMaximized()
-    };
-  };
-  const persistWindowState = () => {
-    const state = structuredClone(latestWindowState);
-    pendingWindowStateWrite = pendingWindowStateWrite
-      .catch(() => undefined)
-      .then(() => saveWindowState(windowStatePath, state))
-      .catch((error: unknown) => {
-        console.warn("无法保存窗口状态", error);
-      });
-    return pendingWindowStateWrite;
-  };
-  const scheduleWindowStateSave = () => {
-    captureWindowState();
-    if (saveWindowStateTimer) {
-      clearTimeout(saveWindowStateTimer);
-    }
-    saveWindowStateTimer = setTimeout(() => {
-      saveWindowStateTimer = undefined;
-      void persistWindowState();
-    }, 2_000);
-  };
-  const flushWindowState = async () => {
-    if (saveWindowStateTimer) {
-      clearTimeout(saveWindowStateTimer);
-      saveWindowStateTimer = undefined;
-    }
-    captureWindowState();
-    await persistWindowState();
-  };
-  window.on("move", scheduleWindowStateSave);
-  window.on("resize", scheduleWindowStateSave);
-  window.on("maximize", scheduleWindowStateSave);
-  window.on("unmaximize", scheduleWindowStateSave);
-  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;
-  let currentMarkdownPath: string | undefined;
-  let pendingOpenedMarkdown:
-    | {
-        document: OpenedMarkdownDocument;
-        filePath: string;
-      }
-    | undefined;
-  const queueOpenedMarkdown = async (filePath: string) => {
-    const opened = await readMarkdownDocument(
-      filePath,
-      MAXIMUM_MARKDOWN_LENGTH
-    );
-    pendingOpenedMarkdown = {
-      document: opened,
-      filePath
-    };
-    window.webContents.send(DESKTOP_MARKDOWN_OPENED);
-  };
-
-  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");
-    }
-    const selection = await dialog.showOpenDialog(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 opened = await readMarkdownDocument(
-      filePath,
-      MAXIMUM_MARKDOWN_LENGTH
-    );
-    documentRoot = path.dirname(filePath);
-    currentMarkdownPath = filePath;
-    return opened;
-  });
-  ipcMain.handle(DESKTOP_CONSUME_PENDING_MARKDOWN, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面文件请求");
-    }
-    const pending = pendingOpenedMarkdown;
-    pendingOpenedMarkdown = undefined;
-    if (!pending) {
-      return undefined;
-    }
-    currentMarkdownPath = pending.filePath;
-    documentRoot = path.dirname(pending.filePath);
-    return pending.document;
-  });
-  ipcMain.handle(DESKTOP_DISCARD_PENDING_MARKDOWN, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面文件请求");
-    }
-    pendingOpenedMarkdown = undefined;
-  });
-  ipcMain.handle(DESKTOP_START_NEW_MARKDOWN, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面文件请求");
-    }
-    currentMarkdownPath = undefined;
-    documentRoot = undefined;
-    pendingOpenedMarkdown = undefined;
-  });
-  ipcMain.handle(
-    DESKTOP_SAVE_MARKDOWN,
-    async (
-      event,
-      unsafeFileName: unknown,
-      unsafeMarkdown: unknown
-    ) => {
-      if (!validateSender(event)) {
-        throw new Error("拒绝未授权的桌面文件请求");
-      }
-      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 = currentMarkdownPath;
-      if (!targetPath) {
-        const suggestedName = /\.(?:md|markdown)$/iu.test(
-          path.basename(unsafeFileName)
-        )
-          ? path.basename(unsafeFileName)
-          : `${path.basename(unsafeFileName)}.md`;
-        const selection = await dialog.showSaveDialog(window, {
-          title: "保存 Markdown",
-          defaultPath: path.join(
-            app.getPath("documents"),
-            suggestedName
-          ),
-          filters: [
-            { name: "Markdown 文件", extensions: ["md", "markdown"] }
-          ]
-        });
-        if (selection.canceled || !selection.filePath) {
-          return undefined;
-        }
-        targetPath = /\.(?:md|markdown)$/iu.test(selection.filePath)
-          ? selection.filePath
-          : `${selection.filePath}.md`;
-      }
-
-      await writeFile(targetPath, unsafeMarkdown, "utf8");
-      currentMarkdownPath = targetPath;
-      documentRoot = path.dirname(targetPath);
-      return { fileName: path.basename(targetPath) };
-    }
-  );
-  ipcMain.handle(DESKTOP_OPEN_THEME_DIRECTORY, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面主题请求");
-    }
-    const themeDirectory = getDesktopThemeDirectory();
-    await mkdir(themeDirectory, { recursive: true });
-    const errorMessage = await shell.openPath(themeDirectory);
-    if (errorMessage) {
-      throw new Error(`无法打开自定义主题目录：${errorMessage}`);
-    }
-    return themeDirectory;
-  });
-  ipcMain.handle(DESKTOP_REFRESH_THEMES, async (event) => {
-    if (!validateSender(event)) {
-      throw new Error("拒绝未授权的桌面主题请求");
-    }
-    applicationService.invalidateThemes();
-  });
-  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();
-  });
-  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");
-      }
-
-      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"] }]
-      });
-      if (selection.canceled || !selection.filePath) {
-        return false;
-      }
-      await writeFile(selection.filePath, unsafePdf);
-      return true;
-    }
-  );
-
-  window.once("ready-to-show", () => {
-    if (savedWindowState?.maximized) {
-      window.maximize();
-    }
-    window.show();
-  });
-  window.on("close", () => {
-    void flushWindowState();
-  });
-  window.on("closed", () => {
-    ipcMain.removeHandler(DESKTOP_OPEN_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_CONSUME_PENDING_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_DISCARD_PENDING_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_START_NEW_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_SAVE_MARKDOWN);
-    ipcMain.removeHandler(DESKTOP_OPEN_THEME_DIRECTORY);
-    ipcMain.removeHandler(DESKTOP_REFRESH_THEMES);
-    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);
-  return {
-    window,
-    openMarkdownFile: queueOpenedMarkdown,
-    flushWindowState
-  };
-}
-
 const hasSingleInstanceLock = app.requestSingleInstanceLock();
 let windowStateReadyToQuit = false;
 
@@ -631,8 +199,8 @@ if (!hasSingleInstanceLock) {
     );
     if (filePath) {
       dispatchExternalMarkdown(filePath);
-    } else {
+    } else if (!applicationController?.focusMostRecentWindow()) {
-      focusApplicationWindow();
+      void applicationController?.createWindow();
     }
   });
   app.on("open-file", (event, filePath) => {
@@ -641,6 +209,11 @@ if (!hasSingleInstanceLock) {
       dispatchExternalMarkdown(filePath);
     }
   });
+  app.on("activate", () => {
+    if (!applicationController?.focusMostRecentWindow()) {
+      void applicationController?.createWindow();
+    }
+  });
   app.on("before-quit", (event) => {
     if (windowStateReadyToQuit || !applicationController) {
       return;
@@ -649,8 +222,14 @@ if (!hasSingleInstanceLock) {
     void applicationController.flushWindowState().finally(() => {
       windowStateReadyToQuit = true;
       app.quit();
+      setTimeout(() => {
+        windowStateReadyToQuit = false;
+      }, 1_000);
     });
   });
+  app.on("will-quit", () => {
+    void applicationController?.closeResources();
+  });
   app
     .whenReady()
     .then(async () => {
@@ -658,18 +237,41 @@ if (!hasSingleInstanceLock) {
       if (process.platform === "win32") {
         app.setAppUserModelId("com.md-to-pdf.desktop");
       }
-      await mkdir(getDesktopThemeDirectory(), { recursive: true });
+      const themeDirectory = getDesktopThemeDirectory();
+      await mkdir(themeDirectory, { recursive: true });
       const applicationService = createDesktopApplicationService();
       await registerApplicationProtocol(applicationService);
-      applicationController =
+
-        await createApplication(applicationService);
+      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"
+        )
+      });
+      await applicationController.initialize();
+
       const startupMarkdownPath = pendingExternalMarkdownPath;
       pendingExternalMarkdownPath = undefined;
-      if (startupMarkdownPath) {
+      await applicationController.createWindow(startupMarkdownPath);
-        await applicationController.openMarkdownFile(
-          startupMarkdownPath
-        );
-      }
     })
     .catch((error: unknown) => {
       console.error("桌面应用启动失败", error);

apps/desktop/src/markdown-file.ts

@@ -1,4 +1,5 @@
-import { readFile, stat } from "node:fs/promises";
+import { createHash } from "node:crypto";
+import { readFile, realpath, stat } from "node:fs/promises";
 import path from "node:path";
 
 const markdownExtensions = new Set([".md", ".markdown"]);
@@ -8,6 +9,24 @@ export interface OpenedMarkdownDocument {
   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());
 }
@@ -58,3 +77,20 @@ export async function readMarkdownDocument(
     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)
+  };
+}

apps/desktop/tests/desktop-document-link.test.ts

@@ -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");
+  });
+});

apps/desktop/tests/markdown-file.test.ts

@@ -3,9 +3,12 @@ import os from "node:os";
 import path from "node:path";
 import { describe, expect, it } from "vitest";
 import {
+  createMarkdownContentHash,
+  createMarkdownDocumentKey,
   findMarkdownFileArgument,
   isMarkdownFilePath,
-  readMarkdownDocument
+  readMarkdownDocument,
+  readMarkdownFileSnapshot
 } from "../src/markdown-file.js";
 
 describe("桌面 Markdown 文件参数", () => {
@@ -72,4 +75,33 @@ describe("桌面 Markdown 文件参数", () => {
       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 });
+    }
+  });
 });

apps/desktop/tests/release-build.test.ts

@@ -0,0 +1,50 @@
+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"
+    );
+  });
+});

apps/web/package.json

@@ -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"

apps/web/src/App.tsx

@@ -27,7 +27,7 @@ import {
   createPagedPreviewRenderRequest,
   isPagedPreviewFrameMessage,
   type PagedPreviewPayload
-} from "./paged-preview";
+} from "@md-to-pdf/preview-engine";
 import {
   getNearestPageNumber,
   getPreviewPageScrollTop
@@ -53,6 +53,7 @@ import {
   downloadMarkdown,
   ensureMarkdownFileName
 } from "./document-file";
+import { resolveWebDocumentLinkAction } from "./document-link";
 import {
   type ThemeSummary,
   useThemeResources
@@ -64,7 +65,7 @@ const PrecisePdfPreview = lazy(async () => {
   return { default: module.PrecisePdfPreview };
 });
 
-type PreviewMode = "quick" | "precise";
+type PreviewMode = "quick" | "precise" | "continuous";
 type DocumentKind = "sample" | "new" | "file";
 const noImageResources: never[] = [];
 
@@ -121,8 +122,11 @@ export function App() {
       return;
     }
     let active = true;
-    const consumeOpenedMarkdown = async () => {
+    const consumeOpenedMarkdown = async (
+      reason: "open" | "reload" | "replace" = "open"
+    ) => {
       if (
+        reason === "open" &&
         documentDirtyRef.current &&
         !window.confirm("当前文档有未保存修改，是否放弃并打开其他文件？")
       ) {
@@ -160,8 +164,8 @@ export function App() {
         }
       }
     };
-    const removeListener = bridge.onMarkdownOpened(() => {
+    const removeListener = bridge.onMarkdownOpened((reason) => {
-      void consumeOpenedMarkdown();
+      void consumeOpenedMarkdown(reason);
     });
     void consumeOpenedMarkdown();
     return () => {
@@ -170,6 +174,18 @@ export function App() {
     };
   }, []);
 
+  useEffect(() => {
+    const bridge = window.mdToPdfDesktop;
+    if (!bridge) {
+      return;
+    }
+    void bridge.setDocumentDirty(documentDirty).catch(
+      (reason: unknown) => {
+        console.warn("无法同步桌面文档修改状态", reason);
+      }
+    );
+  }, [documentDirty]);
+
   useEffect(() => {
     if (!moreMenuOpen) {
       return;
@@ -359,6 +375,11 @@ export function App() {
         return;
       }
 
+      if (event.data.type === "link") {
+        handlePagedPreviewLink(event.data.href);
+        return;
+      }
+
       if (event.data.requestId !== previewRequestIdRef.current) {
         return;
       }
@@ -369,7 +390,11 @@ export function App() {
         setMermaidError("");
         setQuickPreviewContentHeight(undefined);
         setPreviewPagination({ current: 0, total: 0 });
-        setStatus("正在分页…");
+        setStatus(
+          event.data.layout === "continuous"
+            ? "正在更新连续预览…"
+            : "正在分页…"
+        );
         return;
       }
 
@@ -389,12 +414,20 @@ export function App() {
           ? `Mermaid：${event.data.mermaidErrors.join("；")}`
           : ""
       );
-      setStatus(`预览已分页（${event.data.pageCount} 页）`);
+      setStatus(
+        event.data.layout === "continuous"
+          ? "连续预览已更新"
+          : `预览已分页（${event.data.pageCount} 页）`
+      );
       setQuickPreviewContentHeight(event.data.contentHeight);
-      setPreviewPagination({
+      setPreviewPagination(
+        event.data.layout === "continuous"
+          ? { current: 0, total: 0 }
+          : {
               current: event.data.pageCount > 0 ? 1 : 0,
               total: event.data.pageCount
-      });
+            }
+      );
       window.requestAnimationFrame(() => {
         synchronizeScroll("editor");
         window.requestAnimationFrame(updatePreviewCurrentPage);
@@ -435,11 +468,14 @@ export function App() {
     frameWindow.postMessage(
       createPagedPreviewRenderRequest(
         previewRequestIdRef.current,
-        previewPayload
+        previewPayload,
+        previewMode === "continuous"
+          ? "continuous"
+          : "paged"
       ),
       window.location.origin
     );
-  }, [previewFrameReady, previewPayload]);
+  }, [previewFrameReady, previewMode, previewPayload]);
 
   function getOuterPreviewScroller() {
     const previewScroller = previewScrollRef.current;
@@ -456,6 +492,79 @@ export function App() {
     return getOuterPreviewScroller();
   }
 
+  function handlePagedPreviewLink(href: string) {
+    const action = resolveWebDocumentLinkAction(href);
+    if (action.type !== "anchor" && window.mdToPdfDesktop) {
+      void window.mdToPdfDesktop.openDocumentLink(href).catch(
+        (reason: unknown) => {
+          setAppError(
+            reason instanceof Error
+              ? reason.message
+              : "无法打开文档链接"
+          );
+        }
+      );
+      return;
+    }
+    if (action.type === "open") {
+      window.open(
+        action.href,
+        "_blank",
+        "noopener,noreferrer"
+      );
+      return;
+    }
+    if (action.type !== "anchor") {
+      return;
+    }
+
+    const frame = previewFrameRef.current;
+    const frameDocument = frame?.contentDocument;
+    const scrollElement = getPreviewScroller();
+    if (!frame || !frameDocument || !scrollElement) {
+      return;
+    }
+
+    const rawAnchorId = action.href.slice(1);
+    const anchorIds = [rawAnchorId];
+    try {
+      const decodedAnchorId = decodeURIComponent(rawAnchorId);
+      if (decodedAnchorId !== rawAnchorId) {
+        anchorIds.push(decodedAnchorId);
+      }
+    } catch {
+      // 保留原始片段继续查找，兼容不完整的百分号编码。
+    }
+    const target = anchorIds
+      .map(
+        (anchorId) =>
+          frameDocument.getElementById(anchorId) ??
+          frameDocument.getElementsByName(anchorId).item(0)
+      )
+      .find((element) => Boolean(element));
+    if (!target) {
+      return;
+    }
+
+    const scrollerViewportTop =
+      scrollElement === document.scrollingElement
+        ? 0
+        : scrollElement.getBoundingClientRect().top;
+    const frameRect = frame.getBoundingClientRect();
+    const frameScale =
+      frame.offsetWidth > 0
+        ? frameRect.width / frame.offsetWidth
+        : 1;
+    const targetTop = getPreviewPageScrollTop(
+      scrollElement.scrollTop,
+      frameRect.top +
+        target.getBoundingClientRect().top * frameScale,
+      scrollerViewportTop
+    );
+    scrollElement.scrollTo({ top: Math.max(0, targetTop) });
+    window.requestAnimationFrame(updatePreviewCurrentPage);
+  }
+
   function synchronizeScroll(origin: "editor" | "preview") {
     const source =
       origin === "editor" ? editorRef.current : getPreviewScroller();
@@ -487,6 +596,9 @@ export function App() {
       updatePrecisePreviewCurrentPage();
       return;
     }
+    if (previewModeRef.current === "continuous") {
+      return;
+    }
     const frame = previewFrameRef.current;
     const frameDocument = frame?.contentDocument;
     const scrollElement = getPreviewScroller();
@@ -840,8 +952,12 @@ export function App() {
     if (mode === previewMode) {
       return;
     }
+    const keepsFrame =
+      previewMode !== "precise" && mode !== "precise";
     setPreviewMode(mode);
+    if (!keepsFrame) {
       setPreviewFrameReady(false);
+    }
     setQuickPreviewContentHeight(undefined);
     setPreviewPagination({ current: 0, total: 0 });
     previewScrollRef.current?.scrollTo({ top: 0 });
@@ -1041,6 +1157,18 @@ export function App() {
                 >
                   精确
                 </button>
+                <button
+                  type="button"
+                  className={
+                    previewMode === "continuous" ? "is-active" : ""
+                  }
+                  aria-pressed={previewMode === "continuous"}
+                  onClick={() =>
+                    handlePreviewModeChange("continuous")
+                  }
+                >
+                  连续
+                </button>
               </span>
               <label className="theme-control">
                 <span className="sr-only">预览主题</span>
@@ -1090,12 +1218,20 @@ export function App() {
             className="preview-scroll"
             onScroll={handlePreviewScroll}
           >
-            {previewMode === "quick" ? (
+            {previewMode !== "precise" ? (
-              <div className="paper" style={paperStyle}>
+              <div
+                className={`paper${
+                  previewMode === "continuous"
+                    ? " continuous-paper"
+                    : ""
+                }`}
+                style={paperStyle}
+              >
                 {previewPayload ? (
                   <iframe
                     ref={previewFrameRef}
                     className="preview-frame"
+                    scrolling="no"
                     style={previewFrameStyle}
                     title="文档内容预览"
                     sandbox="allow-same-origin allow-scripts"
@@ -1122,6 +1258,8 @@ export function App() {
                 <PrecisePdfPreview
                   blob={cachedPdf.blob}
                   zoomPercent={previewZoom}
+                  onExternalLink={handlePagedPreviewLink}
+                  onNavigateToPage={handlePreviewPageChange}
                   onPageCount={handlePrecisePageCount}
                 />
               </Suspense>

apps/web/src/PrecisePdfPreview.tsx

@@ -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}
         />

apps/web/src/document-link.ts

@@ -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" };
+}

apps/web/src/paged-document-runtime.ts

@@ -1,537 +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,
-  prepareDocumentImageBlocks
-} from "./document-image-fit";
-import {
-  applyMediaBackfillCandidates,
-  findMediaBackfillCandidates,
-  getMediaBackfillIdsInDocumentOrder,
-  prepareMediaBackfillBlocks
-} from "./media-page-backfill";
-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 replaceEChartsSvgWithImages(container: ParentNode) {
-    const { freezeEChartsSvg } = await this.loadECharts();
-    const figures = Array.from(
-      container.querySelectorAll<HTMLElement>(
-        ".md-echarts:not(.md-echarts-error)"
-      )
-    );
-    for (const figure of figures) {
-      const host = figure.querySelector<HTMLElement>(
-        ".md-echarts-host"
-      );
-      const svg = host?.querySelector<SVGSVGElement>("svg");
-      if (!host || !svg) {
-        continue;
-      }
-      const label =
-        host.getAttribute("aria-label") || "ECharts 图表";
-      host.replaceChildren(
-        freezeEChartsSvg(host, svg, "svg-image", label)
-      );
-      figure.dataset.echartsRendered = "svg-image";
-    }
-    await waitForImages(container);
-  }
-
-  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);
-        prepareDocumentImageBlocks(measurement.host);
-        prepareMediaBackfillBlocks(measurement.host);
-        fitDocumentImagesToPage(
-          measurement.host,
-          payload.exportConfig,
-          { prepareBlocks: false }
-        );
-
-        const echartsFitStartedAt = performance.now();
-        fitOversizedEChartsToPage(
-          measurement.host,
-          payload.exportConfig
-        );
-        await this.replaceEChartsSvgWithImages(measurement.host);
-        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 repaginationSource = content.cloneNode(
-      true
-    ) as DocumentFragment;
-    const stylesheets = [
-      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"
-      )
-    ];
-    let previewer = new Previewer();
-    this.activePreviewer = previewer;
-    let flow = await previewer.preview(
-      content,
-      stylesheets,
-      this.root
-    );
-    const mediaIds = getMediaBackfillIdsInDocumentOrder(
-      repaginationSource
-    );
-    let mediaCandidates = new Map(
-      findMediaBackfillCandidates(this.root).map((candidate) => [
-        candidate.id,
-        candidate
-      ])
-    );
-    for (const mediaId of mediaIds) {
-      if (!shouldContinue()) {
-        break;
-      }
-      const candidate = mediaCandidates.get(mediaId);
-      if (
-        !candidate ||
-        applyMediaBackfillCandidates(repaginationSource, [
-          candidate
-        ]) === 0
-      ) {
-        continue;
-      }
-
-      previewer.chunker.destroy();
-      previewer.polisher.destroy();
-      previewer = new Previewer();
-      this.activePreviewer = previewer;
-      flow = await previewer.preview(
-        repaginationSource.cloneNode(true) as DocumentFragment,
-        stylesheets,
-        this.root
-      );
-      mediaCandidates = new Map(
-        findMediaBackfillCandidates(this.root).map(
-          (nextCandidate) => [
-            nextCandidate.id,
-            nextCandidate
-          ]
-        )
-      );
-    }
-    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>;
-  }
-}

apps/web/src/paged-preview-frame.ts

@@ -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";
+} from "@md-to-pdf/preview-engine";
-import { resolvePagedRenderTarget } from "./paged-render-target";
+import highlightCss from "highlight.js/styles/github.css?inline";
-import { resolveMermaidOutputMode } from "./mermaid-static-image";
+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;
@@ -45,11 +90,17 @@ async function renderPagedPreview(
   post({
     scope: PAGED_PREVIEW_MESSAGE_SCOPE,
     type: "rendering",
-    requestId
+    requestId,
+    layout
   });
 
   try {
-    const result = await runtime.render(payload, {
+    const result =
+      layout === "continuous"
+        ? await runtime.renderContinuous(payload, {
+            shouldContinue: () => requestId === latestRequestId
+          })
+        : await runtime.render(payload, {
             target: renderTarget,
             mermaidOutput,
             shouldContinue: () => requestId === latestRequestId
@@ -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;

apps/web/src/pagedjs.d.ts

@@ -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;
-}

apps/web/src/pdf-annotation-links.ts

@@ -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;
+    }
+  };
+}

apps/web/src/styles.css

@@ -583,7 +583,8 @@ textarea:focus {
 }
 
 .precise-pdf-page canvas,
-.precise-pdf-page .textLayer {
+.precise-pdf-page .textLayer,
+.precise-pdf-page .annotationLayer {
   position: absolute;
   inset: 0;
 }
@@ -617,6 +618,45 @@ 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;

apps/web/src/vite-env.d.ts

@@ -32,8 +32,12 @@ declare global {
       | undefined
     >;
     discardPendingMarkdown(): Promise<void>;
-    onMarkdownOpened(listener: () => void): () => void;
+    onMarkdownOpened(
+      listener: (reason: "open" | "reload" | "replace") => void
+    ): () => void;
     startNewMarkdown(): Promise<void>;
+    setDocumentDirty(dirty: boolean): Promise<void>;
+    openDocumentLink(href: string): Promise<void>;
     saveMarkdown(
       fileName: string,
       markdown: string

apps/web/tests/app-version.test.ts

@@ -6,7 +6,7 @@ import {
 
 describe("应用版本", () => {
   it("从统一构建版本生成标题徽标", () => {
-    expect(APP_VERSION).toBe("0.4.5");
+    expect(APP_VERSION).toBe("0.5.0");
-    expect(APP_VERSION_LABEL).toBe("v0.4.5");
+    expect(APP_VERSION_LABEL).toBe("v0.5.0");
   });
 });

apps/web/tests/document-link.test.ts

@@ -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"
+      });
+    }
+  });
+});

apps/web/tests/pdf-annotation-links.test.ts

@@ -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();
+  });
+});

deploy/Dockerfile

@@ -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
 
@@ -24,6 +25,7 @@ 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 +40,7 @@ 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 +70,7 @@ 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
@@ -83,6 +87,7 @@ 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 themes ./themes
 COPY deploy/nginx.conf /etc/nginx/nginx.conf

deploy/README.md

@@ -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
-$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.4.5'
+$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.5.0'
 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
-$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.4.5'
+$env:MD_TO_PDF_IMAGE = 'yixiong/md-to-pdf:v0.5.0'
-$env:MD_TO_PDF_RUNTIME_BASE_IMAGE = 'yixiong/md-to-pdf:v0.3.1'
+$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 v0.4.5 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 v0.5.0 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
+当前内置 Typora Github、Typora Pixyll、Typora whitey 和
-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
+Typora Clean 四套主题；挂载目录只用于额外的本机扩展主题，无需重复
-重复时以内置版本为准。
+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
 

docs/PROGRESS.md

@@ -49,6 +49,12 @@ Web/Compose 发布仍保持 `v0.4.1`。
 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。
+
 ## 2. 已完成
 
 ### 2.1 项目骨架
@@ -470,6 +476,37 @@ Web/Compose 发布仍保持 `v0.4.1`。
 - 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`。
+
 ## 4. 已执行验证
 
 2026-07-28 在当前完整工作区成功执行：
@@ -484,17 +521,44 @@ git diff --check
 结果：
 
 - ECharts 围栏测试：36 项通过；
-- 共享配置测试：9 项通过；
+- Core 共享协议测试：15 项通过；
-- 渲染器测试：12 项通过；
+- 渲染器测试：14 项通过；
-- 应用服务测试：9 项通过；
+- 应用服务测试：11 项通过；
-- 前端测试：87 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：20 项通过；
+- 桌面端测试：26 项通过；
-- 全项目共 202 项测试通过；
+- 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
@@ -740,21 +804,22 @@ ECharts 第二阶段浏览器与 PDF 验证结果：
 ## 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。
-- 已确认分页预览 iframe 内点击超链接会在 iframe 内执行导航，可能将当前
-  预览替换为空白页。该问题不阻塞 `v0.4.5`，计划在 `v0.4.6` 统一处理：
-  区分文档内锚点与外部链接、阻止危险协议，并为外部链接使用受控的新窗口
-  或系统浏览器打开策略。
 - `apps/web/src/App.tsx` 负责分页 iframe 生命周期和父页面消息处理。
 - `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。
+- `packages/preview-engine/src/paged-document-runtime.ts` 是连续预览、
-- `apps/web/src/mermaid-page-fit.ts` 负责超高 Mermaid 的单页等比例适配。
+  快速预览和 PDF 共用的媒体渲染、资源等待和 Paged.js 运行时。
-- `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。
+- `packages/preview-engine/src/continuous-preview.ts` 与
-- `apps/web/src/paged-table-handler.ts` 负责跨页表格表头处理。
+  `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。
@@ -769,15 +834,17 @@ 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、
+- `apps/desktop/src/desktop-application-controller.ts` 负责 Electron
-  应用窗口、IPC 校验和原生 PDF 保存。
+  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
+- `.local/themes/` 只用于外挂自定义主题；四套发布主题已经内置，无需
-  已复制到 `themes/` 并标记为内置主题。
+  重复挂载。历史副本保存在 `.local/theme-backups`，均被 Git 忽略。
-- `.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。
 - 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；
@@ -786,20 +853,19 @@ 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。
-- `v0.4.5` AIO 正式镜像已经通过 Docker Desktop 构建、PDF 冒烟和
+- `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：v0.4.6 超链接导航
+### 阶段一：v0.5.x 稳定性与性能观测
 
-- 在快速预览 iframe 中统一拦截链接点击，避免外部页面替换分页预览；
+- 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；
-- 文档内 `#anchor` 保持在当前预览中定位，并兼容分页后的标题锚点；
+- 覆盖 Windows 100%、125% 和 150% 显示缩放的快速/精确分页差异；
-- `http:`、`https:`、`mailto:` 等允许协议通过受控新窗口或桌面系统
+- 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；
-  浏览器打开；
+- 持续检查连续预览中媒体宽高、单滚动容器和资源释放。
-- 拒绝 `javascript:`、`file:`、未知协议及未授权本地资源；
-- Web 与 Desktop 共用链接分类规则，各平台只实现打开动作适配；
-- 增加快速预览、精确预览和 Desktop 的链接行为测试。
 
 ### 阶段二：导出配置扩展
 

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "md-to-pdf",
-  "version": "0.4.5",
+  "version": "0.5.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "md-to-pdf",
-      "version": "0.4.5",
+      "version": "0.5.0",
       "workspaces": [
         "apps/*",
         "packages/*"
@@ -21,7 +21,7 @@
     },
     "apps/desktop": {
       "name": "@md-to-pdf/desktop",
-      "version": "0.4.5",
+      "version": "0.5.0",
       "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
@@ -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",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "md-to-pdf",
-  "version": "0.4.5",
+  "version": "0.5.0",
   "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",
+    "build": "npm run build:web-runtime && 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: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: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 build -w @md-to-pdf/web && npm run package -w @md-to-pdf/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",
+    "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/web && npm run typecheck -w @md-to-pdf/server && npm run typecheck -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"

packages/application/README.md

@@ -15,6 +15,7 @@ src/
   index.ts                公共导出入口
 tests/
   application-service.test.ts
+  bundled-themes.test.ts
   image-resources.test.ts
 ```
 
@@ -36,6 +37,10 @@ Web 端通过 `apps/server` 的 HTTP API 调用；桌面端在主进程中创建
 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

packages/application/src/image-resources.ts

@@ -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);
+          let normalized: string | undefined;
-          const uploadedImage = uploaded.get(normalized);
+          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");
           }

packages/application/tests/bundled-themes.test.ts

@@ -0,0 +1,30 @@
+import { readFile } 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"
+} as const;
+
+describe("内置主题清单", () => {
+  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);
+    }
+  });
+});

packages/application/tests/image-resources.test.ts

@@ -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 });
+    }
+  });
 });

packages/core/README.md

@@ -8,11 +8,13 @@
 ```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
 ```
 
@@ -20,11 +22,13 @@ tests/
 
 ```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,
@@ -34,6 +38,11 @@ const payload = createPagedDocumentPayload({
 });
 ```
 
+`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。
 

packages/core/src/document-link.ts

@@ -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;
+}

packages/core/src/index.ts

@@ -1,3 +1,4 @@
 export * from "./document.js";
+export * from "./document-link.js";
 export * from "./export-config.js";
 export * from "./theme.js";

packages/core/tests/document-link.test.ts

@@ -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();
+  });
+});

packages/core/tests/export-config.test.ts

@@ -32,6 +32,7 @@ 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.paper).toEqual({
       format: "A4",
       orientation: "portrait",

packages/markdown-echarts/README.md

@@ -5,6 +5,8 @@
 
 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
 
@@ -281,6 +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
 

packages/preview-engine/README.md

@@ -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
+```

packages/preview-engine/package.json

@@ -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"
+  }
+}

packages/preview-engine/src/continuous-preview.ts

@@ -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();
+    }
+  };
+}

packages/preview-engine/src/document-image-fit.ts

@@ -4,7 +4,7 @@ import {
   ensurePageBreakAfter,
   getPageContentDimensions,
   getPrecedingMediaTitleHeight
-} from "./diagram-page-fit";
+} from "./diagram-page-fit.js";
 
 function getImageBlock(image: HTMLImageElement) {
   const parent = image.parentElement;

packages/preview-engine/src/echarts-page-fit.ts

@@ -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,

packages/preview-engine/src/incremental-pagination.ts

@@ -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);
+    }
+  }
+}

packages/preview-engine/src/index.ts

@@ -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";

packages/preview-engine/src/mermaid-page-fit.ts

@@ -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;

packages/preview-engine/src/paged-preview.ts

@@ -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 +75,20 @@ svg {
   max-width: 100%;
 }
 
+#write pre.md-fences > code {
+  display: block;
+  min-width: 0;
+  padding: 0;
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+  font-family: inherit;
+  font-size: inherit;
+  font-weight: inherit;
+  line-height: inherit;
+}
+
 .md-document-image-block {
   break-inside: avoid;
   page-break-inside: avoid;
@@ -133,6 +155,60 @@ 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 ")
@@ -398,12 +474,14 @@ 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 +498,8 @@ 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 +516,54 @@ 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) &&
-    Number.isInteger(candidate.pageCount) &&
+      (candidate.layout === "paged" ||
-    typeof candidate.contentHeight === "number" &&
+        candidate.layout === "continuous")
-    Number.isFinite(candidate.contentHeight) &&
+    );
-    candidate.contentHeight > 0 &&
+  }
-    Array.isArray(candidate.echartsErrors) &&
+
-    Array.isArray(candidate.mermaidErrors)
+  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(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)
   );
 }

packages/preview-engine/src/paged-table-handler.ts

@@ -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;

packages/preview-engine/src/pagedjs.d.ts

@@ -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;
+}

packages/preview-engine/src/pdf-document-links.ts

@@ -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;
+}

packages/preview-engine/tests/continuous-preview.test.ts

@@ -0,0 +1,63 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+import {
+  findCommonPrefixLength,
+  mountContinuousRenderStage
+} from "../src/continuous-preview.js";
+
+describe("连续预览增量边界", () => {
+  it("从首个变化块开始替换后缀", () => {
+    expect(
+      findCommonPrefixLength(
+        ["标题", "段落 A", "图表", "结尾"],
+        ["标题", "段落 A", "新图表", "新结尾"]
+      )
+    ).toBe(2);
+  });
+
+  it("处理新增、删除和完全相同的文档", () => {
+    expect(findCommonPrefixLength(["A"], ["A", "B"])).toBe(1);
+    expect(findCommonPrefixLength(["A", "B"], ["A"])).toBe(1);
+    expect(findCommonPrefixLength(["A", "B"], ["A", "B"])).toBe(2);
+    expect(findCommonPrefixLength(["A"], ["B"])).toBe(0);
+  });
+
+  it("将变化后缀挂载到真实 DOM 测量且提交时不保留包装层", () => {
+    const root = document.createElement("div");
+    const article = document.createElement("article");
+    article.id = "write";
+    article.className = "theme-document";
+    const suffix = document.createDocumentFragment();
+    const heading = document.createElement("h2");
+    heading.textContent = "图表";
+    const chart = document.createElement("figure");
+    chart.className = "md-echarts";
+    suffix.append(heading, chart);
+    document.body.append(root);
+
+    const stage = mountContinuousRenderStage(
+      root,
+      article,
+      suffix
+    );
+
+    expect(stage.article.isConnected).toBe(true);
+    expect(stage.article.parentElement).toBe(root);
+    expect(stage.article.id).toBe("write");
+    expect(stage.article.className).toBe("theme-document");
+    expect(stage.article.dataset.continuousRenderStage).toBe("true");
+    expect(Array.from(stage.article.children)).toEqual([
+      heading,
+      chart
+    ]);
+
+    const rendered = stage.takeContent();
+    expect(Array.from(rendered.children)).toEqual([heading, chart]);
+    expect(stage.article.childNodes).toHaveLength(0);
+
+    stage.dispose();
+    expect(stage.article.isConnected).toBe(false);
+    expect(root.childNodes).toHaveLength(0);
+  });
+});

packages/preview-engine/tests/document-image-fit.test.ts

@@ -2,7 +2,7 @@
 
 import { defaultExportConfig } from "@md-to-pdf/core";
 import { describe, expect, it } from "vitest";
-import { fitDocumentImagesToPage } from "../src/document-image-fit";
+import { fitDocumentImagesToPage } from "../src/document-image-fit.js";
 
 describe("Markdown 图片单页适配", () => {
   it("标记独立图片段落并将超高图片缩放到单页", () => {

packages/preview-engine/tests/echarts-page-fit.test.ts

@@ -2,7 +2,7 @@
 
 import { defaultExportConfig } from "@md-to-pdf/core";
 import { describe, expect, it } from "vitest";
-import { fitOversizedEChartsToPage } from "../src/echarts-page-fit";
+import { fitOversizedEChartsToPage } from "../src/echarts-page-fit.js";
 
 describe("ECharts 单页高度适配", () => {
   it("将超高 SVG 和宿主同步缩放到单页内容区", () => {

packages/preview-engine/tests/incremental-pagination.test.ts

@@ -0,0 +1,135 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+import {
+  assignPagedSourceReferences,
+  createIncrementalPaginationPlan,
+  findSourceNodePageIndex
+} from "../src/incremental-pagination.js";
+
+function createSourceNode(reference: string) {
+  const node = document.createElement("section");
+  node.dataset.ref = reference;
+  return node;
+}
+
+function createPage(
+  references: string[],
+  startReference?: string
+) {
+  const element = document.createElement("article");
+  for (const reference of references) {
+    element.append(createSourceNode(reference));
+  }
+  return {
+    element,
+    startToken: startReference
+      ? {
+          node: createSourceNode(startReference),
+          offset: 0
+        }
+      : undefined
+  };
+}
+
+describe("快速预览增量分页计划", () => {
+  it("从变化块所在页的前一页开始续排", () => {
+    const sourceNodes = [
+      createSourceNode("a"),
+      createSourceNode("b"),
+      createSourceNode("c"),
+      createSourceNode("d")
+    ];
+    const pages = [
+      createPage(["a"]),
+      createPage(["b"], "b"),
+      createPage(["c"], "c"),
+      createPage(["d"], "d")
+    ];
+
+    expect(
+      createIncrementalPaginationPlan(
+        2,
+        sourceNodes.length,
+        sourceNodes,
+        pages
+      )
+    ).toEqual({
+      prefixLength: 2,
+      invalidationPageIndex: 1,
+      startToken: pages[1]?.startToken
+    });
+  });
+
+  it("尾部新增时以旧文档最后一个块定位并回退一页", () => {
+    const sourceNodes = [
+      createSourceNode("a"),
+      createSourceNode("b")
+    ];
+    const pages = [
+      createPage(["a"]),
+      createPage(["b"], "b")
+    ];
+
+    expect(
+      createIncrementalPaginationPlan(
+        2,
+        sourceNodes.length,
+        sourceNodes,
+        pages
+      )?.invalidationPageIndex
+    ).toBe(0);
+  });
+
+  it("无法验证边界时拒绝使用旧分页缓存", () => {
+    const sourceNodes = [createSourceNode("a")];
+    const pages = [createPage(["other"])];
+
+    expect(
+      createIncrementalPaginationPlan(
+        1,
+        sourceNodes.length,
+        sourceNodes,
+        pages
+      )
+    ).toBeUndefined();
+    expect(
+      createIncrementalPaginationPlan(
+        0,
+        sourceNodes.length,
+        sourceNodes,
+        pages
+      )
+    ).toBeUndefined();
+  });
+
+  it("通过 data-ref 在分页结果中反查源节点页码", () => {
+    const pages = [
+      createPage(["a"]),
+      createPage(["b", "c"])
+    ];
+    expect(
+      findSourceNodePageIndex(pages, createSourceNode("c"))
+    ).toBe(1);
+  });
+
+  it("只为新节点补充分页引用并保留既有引用", () => {
+    const root = document.createElement("article");
+    root.dataset.ref = "existing-root";
+    root.id = "write";
+    const child = document.createElement("p");
+    child.id = "paragraph";
+    root.append(child);
+    let sequence = 0;
+
+    assignPagedSourceReferences(root, () => {
+      sequence += 1;
+      return `generated-${sequence}`;
+    });
+
+    expect(root.dataset.ref).toBe("existing-root");
+    expect(root.dataset.id).toBe("write");
+    expect(child.dataset.ref).toBe("generated-1");
+    expect(child.dataset.id).toBe("paragraph");
+  });
+});

packages/preview-engine/tests/media-page-backfill.test.ts

@@ -7,8 +7,8 @@ import {
   findMediaBackfillCandidates,
   getMediaBackfillIdsInDocumentOrder,
   prepareMediaBackfillBlocks
-} from "../src/media-page-backfill";
+} from "../src/media-page-backfill.js";
-import { getPrecedingMediaTitleHeight } from "../src/diagram-page-fit";
+import { getPrecedingMediaTitleHeight } from "../src/diagram-page-fit.js";
 
 function rect(width: number, height: number) {
   return {

packages/preview-engine/tests/mermaid-config.test.ts

@@ -3,7 +3,7 @@ import { defaultExportConfig } from "@md-to-pdf/core";
 import {
   createMermaidSiteConfig,
   MERMAID_SECURE_CONFIG_KEYS
-} from "../src/mermaid-config";
+} from "../src/mermaid-config.js";
 
 describe("Mermaid 站点配置", () => {
   it("默认使用 default 主题和 classic 外观", () => {

packages/preview-engine/tests/mermaid-page-fit.test.ts

@@ -4,7 +4,7 @@ import {
   calculateMermaidPageFit,
   getPageContentDimensions,
   parseSvgViewBox
-} from "../src/mermaid-page-fit";
+} from "../src/mermaid-page-fit.js";
 
 describe("Mermaid 单页高度适配", () => {
   it("解析 SVG viewBox 尺寸", () => {

packages/preview-engine/tests/mermaid-renderer.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it, vi } from "vitest";
-import { renderMermaidDefinitions } from "../src/mermaid-renderer";
+import { renderMermaidDefinitions } from "../src/mermaid-renderer.js";
 
 describe("Mermaid 独立图表渲染", () => {
   it("单个图表失败后继续渲染后续图表", async () => {

packages/preview-engine/tests/mermaid-static-image.test.ts

@@ -4,7 +4,7 @@ import {
   getLockedMermaidBoxSize,
   getMermaidImageAlt,
   resolveMermaidOutputMode
-} from "../src/mermaid-static-image";
+} from "../src/mermaid-static-image.js";
 
 describe("Mermaid 静态 SVG 图片", () => {
   it("生成无需外部请求的 UTF-8 Data URL", () => {

packages/preview-engine/tests/paged-break-token.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { resolveBreakTokenElement } from "../src/paged-break-token";
+import { resolveBreakTokenElement } from "../src/paged-break-token.js";
 
 describe("Paged.js 分页断点", () => {
   it("直接返回元素断点", () => {

packages/preview-engine/tests/paged-preview.test.ts

@@ -2,14 +2,17 @@ import { defaultExportConfig } from "@md-to-pdf/core";
 import { describe, expect, it } from "vitest";
 import {
   buildPagedMediaCss,
+  continuousDocumentGeometryCss,
   createPagedPreviewRenderRequest,
+  documentBaseCss,
   documentGeometryCss,
+  documentInteractionCss,
   formatPageNumber,
   isPagedPreviewFrameMessage,
   isPagedPreviewRenderRequest,
   PAGED_PREVIEW_MESSAGE_SCOPE,
   type PagedPreviewPayload
-} from "../src/paged-preview";
+} from "../src/paged-preview.js";
 
 const payload: PagedPreviewPayload = {
   articleHtml: '<article id="write"><h1>分页测试</h1></article>',
@@ -154,6 +157,43 @@ describe("分页预览协议", () => {
     );
   });
 
+  it("避免 Typora 围栏容器重复应用行内代码盒模型", () => {
+    expect(documentBaseCss).toContain(
+      "#write pre.md-fences > code"
+    );
+    expect(documentBaseCss).toContain("background: transparent;");
+    expect(documentBaseCss).toContain("font-size: inherit;");
+    expect(documentBaseCss).not.toMatch(
+      /#write pre\.md-fences > code\s*\{[^}]*!important/su
+    );
+  });
+
+  it("以低优先级兜底样式保留链接识别和焦点反馈", () => {
+    expect(documentInteractionCss).toContain(":where(#write a[href])");
+    expect(documentInteractionCss).toContain(
+      "text-decoration-line: underline;"
+    );
+    expect(documentInteractionCss).toContain(":focus-visible");
+    expect(documentInteractionCss).toContain("--md-accent");
+    expect(documentInteractionCss).not.toContain("!important");
+  });
+
+  it("连续预览由内容高度驱动且不创建内部滚动容器", () => {
+    expect(continuousDocumentGeometryCss).toContain(
+      "overflow: hidden !important"
+    );
+    expect(continuousDocumentGeometryCss).toContain(
+      "min-height: 0 !important"
+    );
+    expect(continuousDocumentGeometryCss).toContain(
+      '[data-continuous-render-stage="true"]'
+    );
+    expect(continuousDocumentGeometryCss).toContain(
+      "position: fixed !important"
+    );
+    expect(continuousDocumentGeometryCss).not.toContain("100vh");
+  });
+
   it("生成并识别分页渲染请求", () => {
     const request = createPagedPreviewRenderRequest(7, payload);
 
@@ -161,9 +201,17 @@ describe("分页预览协议", () => {
       scope: PAGED_PREVIEW_MESSAGE_SCOPE,
       type: "render",
       requestId: 7,
+      layout: "paged",
       payload
     });
     expect(isPagedPreviewRenderRequest(request)).toBe(true);
+    expect(
+      createPagedPreviewRenderRequest(
+        8,
+        payload,
+        "continuous"
+      ).layout
+    ).toBe("continuous");
     expect(
       isPagedPreviewRenderRequest({
         ...request,
@@ -173,11 +221,26 @@ describe("分页预览协议", () => {
   });
 
   it("只接受分页 iframe 协议消息", () => {
+    expect(
+      isPagedPreviewFrameMessage({
+        scope: PAGED_PREVIEW_MESSAGE_SCOPE,
+        type: "link",
+        href: "https://example.com"
+      })
+    ).toBe(true);
+    expect(
+      isPagedPreviewFrameMessage({
+        scope: PAGED_PREVIEW_MESSAGE_SCOPE,
+        type: "link",
+        href: ""
+      })
+    ).toBe(false);
     expect(
       isPagedPreviewFrameMessage({
         scope: PAGED_PREVIEW_MESSAGE_SCOPE,
         type: "rendered",
         requestId: 3,
+        layout: "paged",
         pageCount: 2,
         contentHeight: 2400,
         echartsErrors: [],
@@ -189,6 +252,7 @@ describe("分页预览协议", () => {
         scope: PAGED_PREVIEW_MESSAGE_SCOPE,
         type: "rendered",
         requestId: 3,
+        layout: "paged",
         pageCount: 2,
         echartsErrors: [],
         mermaidErrors: []

packages/preview-engine/tests/paged-render-target.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { resolvePagedRenderTarget } from "../src/paged-render-target";
+import { resolvePagedRenderTarget } from "../src/paged-render-target.js";
 
 describe("分页文档渲染目标", () => {
   it("默认使用网页预览目标", () => {

packages/preview-engine/tests/pdf-document-links.test.ts

@@ -0,0 +1,33 @@
+// @vitest-environment happy-dom
+
+import { describe, expect, it } from "vitest";
+import { preparePdfDocumentLinks } from "../src/pdf-document-links.js";
+
+describe("PDF 本地链接准备", () => {
+  it("只改写本地链接并保留网络、协议和锚点", () => {
+    const root = document.createElement("article");
+    root.innerHTML = [
+      '<a href="../README.md">本地</a>',
+      '<a href="file:///C:/docs/a.md">文件</a>',
+      '<a href="https://example.com">网络</a>',
+      '<a href="mailto:a@example.com">邮件</a>',
+      '<a href="#chapter">锚点</a>'
+    ].join("");
+
+    expect(preparePdfDocumentLinks(root)).toBe(2);
+    const hrefs = Array.from(root.querySelectorAll("a")).map(
+      (link) => link.getAttribute("href")
+    );
+    expect(hrefs[0]).toContain(
+      "https://mdpdf.local.invalid/document-link?"
+    );
+    expect(hrefs[1]).toContain(
+      "https://mdpdf.local.invalid/document-link?"
+    );
+    expect(hrefs.slice(2)).toEqual([
+      "https://example.com",
+      "mailto:a@example.com",
+      "#chapter"
+    ]);
+  });
+});

packages/preview-engine/tests/preview-styles.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { enablePrintMediaForPreview } from "../src/preview-styles";
+import { enablePrintMediaForPreview } from "../src/preview-styles.js";
 
 describe("打印媒体预览", () => {
   it("将打印媒体规则转换为屏幕预览规则", () => {

packages/preview-engine/tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "rootDir": "src",
+    "outDir": "dist",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "lib": [
+      "ES2022",
+      "DOM",
+      "DOM.Iterable"
+    ]
+  },
+  "include": [
+    "src"
+  ]
+}

packages/renderer/README.md

@@ -17,10 +17,12 @@ tests/
 ## 支持能力
 
 - 标题锚点、表格、任务列表、脚注和代码高亮；
+- markdown-it 原生围栏代码块及 Typora `.md-fences` DOM 兼容；
 - KaTeX 数学公式；
 - Mermaid 安全占位；
 - `@md-to-pdf/markdown-echarts` ECharts YAML 围栏；
 - 图片标题 DOM 与资源引用收集；
+- 保留由 Web/Desktop 平台适配器处理的安全文档链接；
 - `sanitize-html` 白名单过滤和统一 `<article id="write">` 输出。
 
 ## 使用
@@ -33,6 +35,16 @@ const result = renderMarkdown("# 示例", {
 });
 ```
 
+普通围栏代码块输出为：
+
+```html
+<pre class="md-fences" lang="ts"><code class="language-ts">...</code></pre>
+```
+
+`.md-fences` 让 Typora 主题负责完整代码块外观；共享预览引擎会移除内部
+`code` 重复套用的行内代码盒模型，同时保留 highlight.js 的高亮 span。
+Mermaid 和 ECharts 围栏继续使用各自的专用 DOM，不经过该分支。
+
 实际应用优先通过 `@md-to-pdf/application` 调用，以便同时完成主题和图片
 资源处理。
 

packages/renderer/src/render-markdown.ts

@@ -7,6 +7,10 @@ import type {
   RenderedMarkdownDocument,
   ThemeFeature
 } from "@md-to-pdf/core";
+import {
+  classifyDocumentLink,
+  isSafeDocumentLink
+} from "@md-to-pdf/core";
 import {
   markdownItECharts,
   type MarkdownItEChartsErrorContext
@@ -85,6 +89,11 @@ const markdown = new MarkdownIt(markdownOptions)
     trust: false
   });
 
+const defaultValidateLink = markdown.validateLink.bind(markdown);
+markdown.validateLink = (href) =>
+  defaultValidateLink(href) ||
+  classifyDocumentLink(href).scheme === "file";
+
 const defaultFenceRenderer = markdown.renderer.rules.fence;
 const defaultImageRenderer = markdown.renderer.rules.image;
 const defaultParagraphOpenRenderer =
@@ -178,13 +187,21 @@ markdown.renderer.rules.fence = (
   }
 
   if (defaultFenceRenderer) {
-    return defaultFenceRenderer(
+    const renderedFence = defaultFenceRenderer(
       tokens,
       index,
       options,
       environment,
       renderer
     );
+    const languageAttribute = language
+      ? ` lang="${escapeAttribute(language)}"`
+      : "";
+
+    return renderedFence.replace(
+      /^<pre>/u,
+      `<pre class="md-fences"${languageAttribute}>`
+    );
   }
 
   return renderFallbackFence(tokens, index, renderer);
@@ -270,7 +287,7 @@ const safeHtmlOptions: sanitizeHtml.IOptions = {
     input: ["type", "checked", "disabled", "class"],
     li: ["class", "value"],
     ol: ["class", "start"],
-    pre: ["class", "hidden"],
+    pre: ["class", "hidden", "lang"],
     span: ["class", "style"],
     td: ["colspan", "rowspan", "style"],
     th: ["colspan", "rowspan", "scope", "style"]
@@ -279,6 +296,7 @@ const safeHtmlOptions: sanitizeHtml.IOptions = {
   allowedSchemesByTag: {
     img: ["http", "https", "data"]
   },
+  allowedSchemesAppliedToAttributes: ["src", "cite"],
   allowedStyles: {
     span: {
       height: [lengthStylePattern],
@@ -299,9 +317,19 @@ const safeHtmlOptions: sanitizeHtml.IOptions = {
     }
   },
   transformTags: {
-    a: sanitizeHtml.simpleTransform("a", {
+    a(tagName, attributes) {
+      const href = attributes.href;
+      if (href && !isSafeDocumentLink(href)) {
+        delete attributes.href;
+      }
+      return {
+        tagName,
+        attribs: {
+          ...attributes,
           rel: "noopener noreferrer"
-    })
+        }
+      };
+    }
   }
 };
 

packages/renderer/tests/render-markdown.test.ts

@@ -37,6 +37,26 @@ const answer = 42;
     );
   });
 
+  it("为围栏代码块输出 Typora 主题兼容容器", () => {
+    const result = renderMarkdown(`
+\`\`\`
+无语言代码块
+\`\`\`
+
+\`\`\`ts
+const answer = 42;
+\`\`\`
+`);
+
+    expect(result.bodyHtml).toContain(
+      '<pre class="md-fences"><code>无语言代码块\n</code></pre>'
+    );
+    expect(result.bodyHtml).toContain(
+      '<pre class="md-fences" lang="ts"><code class="language-ts">'
+    );
+    expect(result.bodyHtml).toContain("hljs-keyword");
+  });
+
   it("保留 Markdown 表格的列对齐语义", () => {
     const result = renderMarkdown(`
 | 左对齐 | 居中 | 右对齐 |
@@ -211,6 +231,38 @@ option:
     expect(result.bodyHtml).toContain("&lt;script&gt;");
   });
 
+  it("保留平台适配器可处理的文档链接", () => {
+    const result = renderMarkdown(`
+[锚点](#章节一)
+[网络](https://example.com/a)
+[协议相对](//example.com/a)
+[邮件](mailto:a@example.com)
+[电话](tel:+8612345)
+[上级目录](../docs/a.md)
+[绝对路径](C:/docs/a.md)
+[本地 URI](<file:///C:/docs/a.md>)
+[自定义协议](obsidian://open?vault=x)
+`);
+
+    expect(result.bodyHtml).toContain('href="#%E7%AB%A0%E8%8A%82%E4%B8%80"');
+    expect(result.bodyHtml).toContain(
+      'href="https://example.com/a"'
+    );
+    expect(result.bodyHtml).toContain('href="//example.com/a"');
+    expect(result.bodyHtml).toContain(
+      'href="mailto:a@example.com"'
+    );
+    expect(result.bodyHtml).toContain('href="tel:+8612345"');
+    expect(result.bodyHtml).toContain('href="../docs/a.md"');
+    expect(result.bodyHtml).toContain('href="C:/docs/a.md"');
+    expect(result.bodyHtml).toContain(
+      'href="file:///C:/docs/a.md"'
+    );
+    expect(result.bodyHtml).toContain(
+      'href="obsidian://open?vault=x"'
+    );
+  });
+
   it("提取图片引用并使用受控资源地址替换", () => {
     const source =
       "![本地](./文档.assets/a%20b.png)\n\n![远程](https://example.com/a.png)";

tests/README.md

@@ -1,9 +1,21 @@
 # 测试
 
-后续测试分为：
+项目测试分为：
 
 - 导出配置与主题清单单元测试；
-- Markdown 渲染快照测试；
+- Markdown、代码围栏和链接分类测试；
 - HTML 预览接口测试；
-- PDF 生成端到端测试；
+- 连续预览、增量分页、媒体回填和 PDF 链接测试；
-- 临时文件和路径安全测试。
+- Desktop 多窗口、同文件单例、文件变化和发行构建链测试；
+- PDF 生成、临时文件和路径安全测试。
+
+完整验证：
+
+```powershell
+npm test
+npm run typecheck
+npm run build
+git diff --check
+```
+
+浏览器与 Electron 端到端验收结果记录在 `docs/PROGRESS.md`。

themes/typora-github/theme.json

@@ -1,7 +1,7 @@
 {
   "manifestVersion": 1,
   "id": "typora-github",
-  "name": "Typora 默认（GitHub）",
+  "name": "Typora Github",
   "version": "1.14.7",
   "description": "从 Typora 1.14.7 导入，供公司内部私有部署使用。",
   "author": "Typora",

themes/typora-like/theme.json

@@ -1,7 +1,7 @@
 {
   "manifestVersion": 1,
   "id": "typora-like",
-  "name": "Typora 风格",
+  "name": "Typora Clean",
   "version": "0.1.0",
   "description": "项目自有的简洁技术文档主题，不复制 Typora 官方主题代码。",
   "author": "md-to-pdf contributors",

themes/typora-pixyll/theme.json

@@ -1,7 +1,7 @@
 {
   "manifestVersion": 1,
   "id": "typora-pixyll",
-  "name": "Typora 默认（Pixyll）",
+  "name": "Typora Pixyll",
   "version": "1.14.7",
   "description": "从 Typora 1.14.7 导入，供公司内部私有部署使用。",
   "author": "Typora",

themes/typora-whitey/theme.json

@@ -1,7 +1,7 @@
 {
   "manifestVersion": 1,
   "id": "typora-whitey",
-  "name": "Typora 默认（Whitey）",
+  "name": "Typora whitey",
   "version": "1.14.7",
   "description": "从 Typora 1.14.7 导入，供公司内部私有部署使用。",
   "author": "Typora",