diff --git a/CHANGELOG.md b/CHANGELOG.md
index ded6dd5..d66f6bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,24 @@
 
 All notable changes to MetonaEditor will be documented in this file.
 
+## [0.4.1] - 2026-08-11
+
+### Added
+- **`zenMaxWidth` 配置项**: Zen 专注模式内容区宽度可配置（`number` 为 px / `string` 原样作为 CSS 值 / `false` 不限制），默认由硬编码 820px 提升至 960px，经 CSS 变量 `--md-zen-max-width` 实现实例级隔离。
+- **运行时 API**: `editor.setZenMaxWidth(width)` / `editor.getZenMaxWidth()` 随时调整专注模式宽度。
+
+### Fixed
+- **`wordWrap: false` 配置不生效**: 构造函数此前将 `_wordWrap` 硬编码为 `true`，忽略配置项，导致初始仍自动换行；现读取配置并在构建时应用 `white-space: pre`。
+- **`outline: true` 启动时不显示大纲面板**: 构造函数此前只注册滚动跟踪、未构建面板，须等首次输入才出现；现构造后自动构建，且 `setMode()` 切换回预览类模式时同步重建。
+- **edit 模式初始行号不渲染**: `_render()` 在 edit 模式直接返回导致 gutter 为空；现 edit 模式也维护行号装订线。
+- **exportTool 卸载泄漏**: `unuse('exportTool')` / `destroy()` 此前不清理挂载在实例上的 `exportMarkdown` / `exportHTML` / `exportPDF` 方法；现卸载时一并删除。
+- **searchReplace 替换后字数统计过期**: `replaceOne` / `replaceAll` 直接改值后未刷新状态栏统计；现调用 `_updateWordCount()`。
+
+### Added
+- 回归测试 15 个（zenMaxWidth 默认/数字/字符串/false/运行时更新/启动应用、wordWrap: false 生效、outline 构造自动构建与模式切换重建、edit/preview 模式初始行号、exportTool 卸载清理），总数 826 → 841。
+
+---
+
 ## [0.4.0] - 2026-08-11
 
 ### Added
diff --git a/README.md b/README.md
index 530a55f..08cd68e 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,9 @@
 
 > TypeScript 重构 · 零运行时依赖 · 轻量级桌面端 Markdown Editor 库
 
-[![version](https://img.shields.io/badge/version-0.4.0-blue)](https://git.metona.cn/MetonaTeam/-/packages/npm/@metona-team%2Fmetona-editor)
+[![version](https://img.shields.io/badge/version-0.4.1-blue)](https://git.metona.cn/MetonaTeam/-/packages/npm/@metona-team%2Fmetona-editor)
 [![license](https://img.shields.io/badge/license-MIT-green)](./LICENSE)
-[![tests](https://img.shields.io/badge/tests-826%20passed-brightgreen)](./tests)
+[![tests](https://img.shields.io/badge/tests-841%20passed-brightgreen)](./tests)
 [![coverage](https://img.shields.io/badge/coverage-parser%2099%25-brightgreen)](./tests)
 [![types](https://img.shields.io/badge/types-TypeScript%20strict-blue)](./tsconfig.json)
 
@@ -17,11 +17,11 @@
 - **三模式视图** — edit / split / preview，拖拽分隔条调整比例，双向滚动同步
 - **主题系统** — light / dark / warm / auto，CSS 变量可定制，实例级隔离，主题继承，外部跟随
 - **国际化** — zh-CN / en-US / ja / ko / fr / de 六种语言完整翻译，实例级语言隔离，远程加载翻译包
-- **编辑体验** — 行号装订线、智能 Enter、括号自动闭合、拖放文件、大纲面板、Zen 专注模式、右键上下文菜单
+- **编辑体验** — 行号装订线、智能 Enter、括号自动闭合、拖放文件、大纲面板、Zen 专注模式（宽度可配置，默认 960px）、右键上下文菜单
 - **内置语法高亮** — 零依赖轻量高亮器，js/ts/python/bash/css/html 等 16 个语言标识，规则缓存零重建开销，`MeEditor.highlight` 即插即用
 - **性能** — 字数 / 词数 / 行数差异增量统计，击键零全量扫描；大纲 O(n) 线性构建，长文档即时响应
 - **安全** — HTML 转义，XSS 协议过滤（javascript / vbscript / file / data），属性级注入防护（含脚注 id），白名单裸标签透传，sanitize 钩子
-- **工程化** — 826 个单元测试 + Playwright 真实浏览器冒烟测试，CI 并行 4 job，`sideEffects: false` 便于 tree-shaking
+- **工程化** — 841 个单元测试 + Playwright 真实浏览器冒烟测试，CI 并行 4 job，`sideEffects: false` 便于 tree-shaking
 - **桌面端优先** — 纯电脑端设计，无移动端冗余代码
 - **引用链接** — 支持 `[text][ref]` / `![alt][ref]` 引用式链接和图片，含 title 属性
 - **RTL 支持** — 完整的从右到左布局适配（阿拉伯语、希伯来语等）
@@ -79,10 +79,10 @@ const editor = MeEditor.create('#editor', { mode: 'split' });
 
 ```html
 <!-- jsDelivr CDN (推荐) -->
-<script src="https://cdn.jsdelivr.net/npm/@metona-team/metona-editor@0.4.0/dist/metona-editor.min.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/@metona-team/metona-editor@0.4.1/dist/metona-editor.min.js"></script>
 
 <!-- unpkg CDN -->
-<script src="https://unpkg.com/@metona-team/metona-editor@0.4.0/dist/metona-editor.min.js"></script>
+<script src="https://unpkg.com/@metona-team/metona-editor@0.4.1/dist/metona-editor.min.js"></script>
 
 <!-- Gitea 源 -->
 <script src="https://git.metona.cn/MetonaTeam/MetonaEditor/raw/branch/master/dist/metona-editor.js"></script>
@@ -144,6 +144,7 @@ MeEditor.create(container, {
   syncScroll: true,     // 分屏同步滚动
   autoBrackets: true,   // 括号自动闭合
   zenMode: false,       // 启动即进入 Zen 专注模式
+  zenMaxWidth: 960,     // Zen 内容区最大宽度：数字为 px / 字符串原样作为 CSS 值 / false 不限制
   wordWrap: true,       // 自动换行
   maxLength: 0,         // 最大字符数（0=不限）
   floatingToolbar: true, // 选中文本浮动格式栏
@@ -346,6 +347,8 @@ editor.removeToolbarButton(action: string): this
 ```typescript
 editor.toggleZen(): this
 editor.isZen(): boolean
+editor.setZenMaxWidth(width: number | string | false): this  // 运行时调整专注模式宽度
+editor.getZenMaxWidth(): number | string | false
 editor.toggleWordWrap(): this
 editor.setWordWrap(on: boolean): this
 editor.isWordWrap(): boolean
@@ -809,7 +812,7 @@ src/
 |------|------|
 | 语言 | TypeScript 5 (strict) |
 | 构建 | Rollup 3 |
-| 测试 | Jest 29 + jsdom（826 用例） |
+| 测试 | Jest 29 + jsdom（841 用例） |
 | 浏览器冒烟 | Playwright + Chromium（22 项断言） |
 | 类型生成 | rollup-plugin-dts |
 | 零运行时依赖 | ✅ |
diff --git a/package.json b/package.json
index 512d446..d2bdcb3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@metona-team/metona-editor",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Type-safe, lightweight, zero-dependency Markdown Editor. Desktop-first. React-free. Single-file bundle.",
   "type": "module",
   "main": "dist/metona-editor.cjs",
diff --git a/site/demo.html b/site/demo.html
index c454678..0bc9b5a 100644
--- a/site/demo.html
+++ b/site/demo.html
@@ -4,7 +4,7 @@
 <meta charset="utf-8"/>
 <meta name="viewport" content="width=device-width, initial-scale=1"/>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>📝</text></svg>"/>
-<title>MetonaEditor v0.4.0 — 全功能演示</title>
+<title>MetonaEditor v0.4.1 — 全功能演示</title>
 <style>
 *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
 :root{--app-bg:#f5f6f8;--app-text:#1a1a2e;--app-card:#fff;--app-border:#e5e7eb;--app-accent:#3b82f6;--app-accent2:#8b5cf6;--header-bg:linear-gradient(135deg,#1e293b 0%,#0f172a 100%);--header-text:#f1f5f9;--badge-bg:rgba(255,255,255,.12);--badge-text:#e2e8f0}
@@ -45,11 +45,11 @@ body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Micr
 <body>
 
 <header class="header">
-  <h1><span class="grad">Metona</span>Editor v0.4.0</h1>
+  <h1><span class="grad">Metona</span>Editor v0.4.1</h1>
   <div class="badges">
     <span class="badge">TypeScript</span>
     <span class="badge">零运行时依赖</span>
-    <span class="badge">826 tests</span>
+    <span class="badge">841 tests</span>
     <span class="badge">6 个插件</span>
     <span class="badge">桌面端优先</span>
   </div>
@@ -85,7 +85,7 @@ body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Micr
   <div class="info-card"><div class="icon">🎨</div><h4>内置语法高亮</h4><p>零依赖 tokenizer，js / ts / python / bash 等 16 个语言标识</p></div>
   <div class="info-card"><div class="icon">📂</div><h4>磁盘文件读写</h4><p>File System Access API 打开 / 保存真实 .md 文件</p></div>
   <div class="info-card"><div class="icon">🔢</div><h4>行号装订线</h4><p>当前行高亮，与编辑区滚动同步</p></div>
-  <div class="info-card"><div class="icon">🧘</div><h4>Zen 专注模式</h4><p>工具栏自动隐藏，鼠标移到顶部滑入</p></div>
+  <div class="info-card"><div class="icon">🧘</div><h4>Zen 专注模式</h4><p>工具栏自动隐藏，宽度可配置（zenMaxWidth，默认 960px）</p></div>
   <div class="info-card"><div class="icon">⌨️</div><h4>快捷键面板</h4><p>按 ? 查看全部快捷键，Ctrl+F/H 搜索替换</p></div>
   <div class="info-card"><div class="icon">📊</div><h4>Mermaid 图表</h4><p>```mermaid 代码块，加载 Mermaid.js 即可渲染</p></div>
   <div class="info-card"><div class="icon">🔌</div><h4>6 个预设插件</h4><p>autoSave / exportTool / searchReplace / imagePaste / shortcutHelp / fileSystem</p></div>
@@ -93,7 +93,7 @@ body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Micr
 </div>
 
 <footer class="footer">
-  MetonaEditor v0.4.0 · TypeScript · <a href="index.html">首页</a> · <a href="docs.html">API 文档</a> · <a href="https://git.metona.cn/MetonaTeam/MetonaEditor" target="_blank" rel="noopener">源码仓库</a> · MIT
+  MetonaEditor v0.4.1 · TypeScript · <a href="index.html">首页</a> · <a href="docs.html">API 文档</a> · <a href="https://git.metona.cn/MetonaTeam/MetonaEditor" target="_blank" rel="noopener">源码仓库</a> · MIT
 </footer>
 
 <script src="https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.min.js"></script>
@@ -101,13 +101,15 @@ body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Micr
 <script>
 (function(){
 var demoMd=[
-  '# 🚀 MetonaEditor v0.4.0 全功能演示',
+  '# 🚀 MetonaEditor v0.4.1 全功能演示',
   '',
   '> TypeScript 重构 · 零运行时依赖 · **桌面端** Markdown Editor 库。',
-  '> 全模块 TypeScript 严格模式，17 个源文件，826 个测试全部通过。',
+  '> 全模块 TypeScript 严格模式，17 个源文件，841 个测试全部通过。',
   '',
-  '## ✨ v0.4.0 新特性',
+  '## ✨ v0.4.1 新特性',
   '',
+  '- **Zen 专注模式宽度可配置**：`zenMaxWidth` 默认 960px，支持数字 / CSS 字符串 / `false` 不限宽',
+  '- **修复 5 处问题**：`wordWrap: false` 生效 · outline 启动即构建 · edit 模式初始行号 · exportTool 卸载清理 · 替换后统计刷新',
   '- **Playwright 浏览器冒烟测试**：22 项断言真实 Chromium 验证',
   '- **实例级 i18n**：状态栏 / 工具栏 / 右键菜单 / 大纲全部跟随实例语言',
   '- `sideEffects: false` 优化打包 · `MeEditor.destroy()` 全面复位',
@@ -139,6 +141,7 @@ var demoMd=[
   '',
   '| 版本 | 日期 | 测试 | 主题 |',
   '| :--- | :---: | ---: | --- |',
+  '| v0.4.1 | 2026-08 | 841 | Zen宽度可配置+5项修复 |',
   '| v0.4.0 | 2026-08 | 826 | E2E冒烟+实例i18n |',
   '| v0.3.1 | 2026-08 | 821 | 增量统计+高亮缓存 |',
   '| v0.3.0 | 2026-08 | 801 | 安全修复+缓存指纹 |',
diff --git a/site/docs.html b/site/docs.html
index 60d01b8..a57a41a 100644
--- a/site/docs.html
+++ b/site/docs.html
@@ -4,7 +4,7 @@
 <meta charset="UTF-8"/>
 <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>📖</text></svg>"/>
-<title>MetonaEditor v0.4.0 · 文档</title>
+<title>MetonaEditor v0.4.1 · 文档</title>
 <style>
 *{box-sizing:border-box;margin:0;padding:0}
 :root{--bg:#0f1117;--bg-soft:#161922;--card:#1c2029;--card-hover:#232834;--text:#e6e8eb;--muted:#9ca3af;--accent:#3b82f6;--accent-2:#8b5cf6;--accent-soft:rgba(59,130,246,.12);--border:rgba(255,255,255,.08);--gradient:linear-gradient(135deg,#3b82f6 0%,#8b5cf6 50%,#ec4899 100%)}
@@ -65,7 +65,7 @@ footer a{color:var(--accent);text-decoration:none}
 
 <header class="docs-header">
   <h1><span class="grad">API 文档</span></h1>
-  <p class="sub">MetonaEditor v0.4.0 · TypeScript · 完整配置、API 与使用指南</p>
+  <p class="sub">MetonaEditor v0.4.1 · TypeScript · 完整配置、API 与使用指南</p>
 </header>
 
 <div class="container">
@@ -146,6 +146,8 @@ footer a{color:var(--accent);text-decoration:none}
   historyLimit<span class="c-punc">:</span> <span class="c-num">100</span><span class="c-punc">,</span>      historyDebounce<span class="c-punc">:</span> <span class="c-num">400</span><span class="c-punc">,</span>
   syncScroll<span class="c-punc">:</span> <span class="c-kw">true</span><span class="c-punc">,</span>       autoBrackets<span class="c-punc">:</span> <span class="c-kw">true</span><span class="c-punc">,</span>
   zenMode<span class="c-punc">:</span> <span class="c-kw">false</span><span class="c-punc">,</span>         wordWrap<span class="c-punc">:</span> <span class="c-kw">true</span><span class="c-punc">,</span>
+  <span class="c-com">// Zen 内容区最大宽度（数字为 px / 字符串为 CSS 值 / false 不限宽）</span>
+  zenMaxWidth<span class="c-punc">:</span> <span class="c-num">960</span><span class="c-punc">,</span>
   maxLength<span class="c-punc">:</span> <span class="c-num">0</span><span class="c-punc">,</span>          <span class="c-com">// 最大字符数（0=不限）</span>
   floatingToolbar<span class="c-punc">:</span> <span class="c-kw">true</span><span class="c-punc">,</span> <span class="c-com">// 选中文本浮动格式栏</span>
 
@@ -252,6 +254,8 @@ editor<span class="c-punc">.</span><span class="c-fn">canUndo</span><span class=
 <pre>editor<span class="c-punc">.</span><span class="c-fn">setMode</span><span class="c-punc">(</span><span class="c-str">'split'</span><span class="c-punc">);</span>  editor<span class="c-punc">.</span><span class="c-fn">getMode</span><span class="c-punc">();</span>
 editor<span class="c-punc">.</span><span class="c-fn">toggleFullscreen</span><span class="c-punc">();</span>  <span class="c-fn">isFullscreen</span><span class="c-punc">();</span>  <span class="c-fn">exitFullscreen</span><span class="c-punc">();</span>
 editor<span class="c-punc">.</span><span class="c-fn">toggleZen</span><span class="c-punc">();</span>  <span class="c-fn">isZen</span><span class="c-punc">();</span>  <span class="c-com">// 或配置 zenMode: true 启动即进入</span>
+editor<span class="c-punc">.</span><span class="c-fn">setZenMaxWidth</span><span class="c-punc">(</span><span class="c-num">1200</span><span class="c-punc">);</span> <span class="c-com">// 运行时调整专注模式宽度（数字 / CSS 字符串 / false）</span>
+editor<span class="c-punc">.</span><span class="c-fn">getZenMaxWidth</span><span class="c-punc">();</span> <span class="c-com">// => number | string | false</span>
 editor<span class="c-punc">.</span><span class="c-fn">toggleWordWrap</span><span class="c-punc">();</span>  <span class="c-fn">setWordWrap</span><span class="c-punc">(</span><span class="c-kw">true</span><span class="c-punc">);</span>  <span class="c-fn">isWordWrap</span><span class="c-punc">();</span>
 editor<span class="c-punc">.</span><span class="c-fn">toggleFloatingToolbar</span><span class="c-punc">();</span>  <span class="c-fn">isFloatingToolbar</span><span class="c-punc">();</span> <span class="c-com">// 选中文本格式栏</span></pre>
 </section>
@@ -487,7 +491,7 @@ i18nUtils<span class="c-punc">.</span><span class="c-fn">formatDate</span><span
 
 <footer>
   <div class="container">
-    MetonaEditor v0.4.0 · TypeScript · <a href="https://git.metona.cn/MetonaTeam/MetonaEditor" target="_blank" rel="noopener">源码仓库</a> · MIT License
+    MetonaEditor v0.4.1 · TypeScript · <a href="https://git.metona.cn/MetonaTeam/MetonaEditor" target="_blank" rel="noopener">源码仓库</a> · MIT License
   </div>
 </footer>
 
diff --git a/site/index.html b/site/index.html
index 59e96d8..e5a77e7 100644
--- a/site/index.html
+++ b/site/index.html
@@ -4,7 +4,7 @@
 <meta charset="UTF-8"/>
 <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>🚀</text></svg>"/>
-<title>MetonaEditor v0.4.0 · TypeScript · 桌面端 Markdown 编辑器</title>
+<title>MetonaEditor v0.4.1 · TypeScript · 桌面端 Markdown 编辑器</title>
 <style>
 *{box-sizing:border-box;margin:0;padding:0}
 :root{--bg:#0f1117;--bg-soft:#161922;--card:#1c2029;--card-hover:#232834;--text:#e6e8eb;--muted:#9ca3af;--accent:#3b82f6;--accent-2:#8b5cf6;--accent-3:#ec4899;--accent-soft:rgba(59,130,246,.12);--border:rgba(255,255,255,.08);--gradient:linear-gradient(135deg,#3b82f6 0%,#8b5cf6 50%,#ec4899 100%);--shadow:0 20px 50px -20px rgba(0,0,0,.5)}
@@ -106,10 +106,10 @@ footer a:hover{text-decoration:underline}
   <h1>TypeScript 重构 · 零依赖<br/><span class="grad">桌面端 Markdown 编辑器</span></h1>
   <p class="tagline">全模块 TypeScript 严格模式，内置自研解析器（99% 行覆盖率），6 个预设插件，中文优先。为桌面端现代 Web 应用而生。</p>
   <div class="badges">
-    <span class="badge accent">v0.4.0</span>
+    <span class="badge accent">v0.4.1</span>
     <span class="badge">TypeScript</span>
     <span class="badge">零运行时依赖</span>
-    <span class="badge">826 tests</span>
+    <span class="badge">841 tests</span>
     <span class="badge">桌面端优先</span>
     <span class="badge">MIT</span>
   </div>
@@ -120,7 +120,7 @@ footer a:hover{text-decoration:underline}
   <div class="stats">
     <div class="stat"><div class="stat-num">0</div><div class="stat-label">运行时依赖</div></div>
     <div class="stat"><div class="stat-num">99%</div><div class="stat-label">解析器行覆盖</div></div>
-    <div class="stat"><div class="stat-num">826</div><div class="stat-label">单元测试</div></div>
+    <div class="stat"><div class="stat-num">841</div><div class="stat-label">单元测试</div></div>
     <div class="stat"><div class="stat-num">~42KB</div><div class="stat-label">gzip 体积</div></div>
   </div>
 </header>
@@ -147,7 +147,7 @@ footer a:hover{text-decoration:underline}
       <div class="feature"><div class="feature-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/></svg></div><h3>主题 & i18n</h3><p>4 套预设主题 + CSS 变量定制 + 实例级隔离。六种语言开箱即用（中 / 英 / 日 / 韩 / 法 / 德），支持远程加载翻译包。</p></div>
       <div class="feature"><div class="feature-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="16 18 22 12 16 6"/><polyline points="8 6 2 12 8 18"/></svg></div><h3>内置语法高亮</h3><p>零依赖轻量高亮器，js / ts / python / bash / css 等 16 个语言标识，代码块一行配置即自动着色。</p></div>
       <div class="feature"><div class="feature-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/></svg></div><h3>XSS 安全防护</h3><p>HTML 转义、危险协议过滤、属性级注入防护、sanitize 钩子、highlight 异常回退。多层防护，安全可靠。</p></div>
-      <div class="feature"><div class="feature-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="13 2 3 14 12 14 11 22 21 10 12 10 13 2"/></svg></div><h3>性能与工程</h3><p>字数/词数/行数差异增量统计、高亮规则缓存、大纲 O(n) 构建；826 单测 + Playwright 真实浏览器冒烟，CI 并行 4 job。</p></div>
+      <div class="feature"><div class="feature-icon"><svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="13 2 3 14 12 14 11 22 21 10 12 10 13 2"/></svg></div><h3>性能与工程</h3><p>字数/词数/行数差异增量统计、高亮规则缓存、大纲 O(n) 构建；841 单测 + Playwright 真实浏览器冒烟，CI 并行 4 job。</p></div>
     </div>
   </div>
 </section>
@@ -167,7 +167,7 @@ footer a:hover{text-decoration:underline}
 <span class="c-kw">const</span> MeEditor <span class="c-punc">=</span> <span class="c-fn">require</span><span class="c-punc">(</span><span class="c-str">'@metona-team/metona-editor'</span><span class="c-punc">);</span>
 
 <span class="c-com">// 方式二：CDN 引入</span>
-<span class="c-com">&lt;script src="https://cdn.jsdelivr.net/npm/@metona-team/metona-editor@0.4.0/dist/metona-editor.min.js"&gt;&lt;/script&gt;</span>
+<span class="c-com">&lt;script src="https://cdn.jsdelivr.net/npm/@metona-team/metona-editor@0.4.1/dist/metona-editor.min.js"&gt;&lt;/script&gt;</span>
 
 <span class="c-com">// 方式三：本地文件</span>
 <span class="c-com">&lt;script src="./dist/metona-editor.min.js"&gt;&lt;/script&gt;</span>
@@ -230,7 +230,7 @@ editor<span class="c-punc">.</span><span class="c-fn">exec</span><span class="c-
       <a href="https://git.metona.cn/MetonaTeam/MetonaEditor" target="_blank" rel="noopener">源码仓库</a>
       <a href="https://git.metona.cn/MetonaTeam/MetonaEditor/issues" target="_blank" rel="noopener">问题反馈</a>
     </div>
-    <div>MetonaEditor v0.4.0 · TypeScript · MIT License · MetonaTeam</div>
+    <div>MetonaEditor v0.4.1 · TypeScript · MIT License · MetonaTeam</div>
   </div>
 </footer>
 
@@ -240,7 +240,7 @@ MeEditor.themes.switchTheme('dark');
 MeEditor.create('#editor', {
   mode: 'split', height: 480, theme: 'dark',
   value: [
-    '# 欢迎使用 MetonaEditor v0.4.0',
+    '# 欢迎使用 MetonaEditor v0.4.1',
     '',
     '一个 **TypeScript 重构 · 零运行时依赖** 的桌面端 Markdown 编辑器。',
     '',
diff --git a/src/constants.ts b/src/constants.ts
index 63cdd10..3fcaeb5 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -41,6 +41,7 @@ export interface EditorOptions {
   outline?: boolean;
   autoBrackets?: boolean;
   zenMode?: boolean;
+  zenMaxWidth?: number | string | false;
   wordWrap?: boolean;
   maxLength?: number;
   theme?: ThemeName;
@@ -119,6 +120,7 @@ export const DEFAULTS: Readonly<EditorOptions> = Object.freeze({
   outline: false,
   autoBrackets: true,
   zenMode: false,
+  zenMaxWidth: 960,
   wordWrap: true,
   maxLength: 0,
   theme: 'auto',
diff --git a/src/core.ts b/src/core.ts
index 34777be..f643ada 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -135,7 +135,7 @@ export class MarkdownEditor {
     this._listeners = {}; this._renderRaf = null; this._historyTimer = null;
     this._fullscreen = false; this._destroyed = false; this._lastRenderedValue = null;
     this._shortcuts = []; this._contextMenuItems = []; this._customActions = {};
-    this._outlineTimer = null; this._zenMode = this.config.zenMode === true; this._wordWrap = true; this._syncing = false;
+    this._outlineTimer = null; this._zenMode = this.config.zenMode === true; this._wordWrap = this.config.wordWrap !== false; this._syncing = false;
     this._zenMouseHandler = null;
     this._floatingToolbar = null;
     this._floatingEnabled = this.config.floatingToolbar !== false;
@@ -148,6 +148,7 @@ export class MarkdownEditor {
     // 实例 i18n 需在 _buildDOM 之前创建：DOM 构建与工具栏渲染会读取实例语言
     this._i18nCtx = createInstanceI18n(this);
     this._buildDOM();
+    this._applyZenWidth();
     this._themeCtx = createInstanceTheme(this);
 
     if (options.theme && typeof document !== 'undefined') {
@@ -166,9 +167,11 @@ export class MarkdownEditor {
     if (this.config.floatingToolbar !== false) this._initFloatingToolbar();
 
     this.textarea.value = this._value;
+    if (!this._wordWrap) this.textarea.style.whiteSpace = 'pre';
     this._pushHistory();
     this._render();
     this._updateWordCount();
+    this._buildOutline();
     if (this._zenMode) this._setZen(true);
 
     if (Array.isArray(this.config.plugins)) {
@@ -421,7 +424,7 @@ export class MarkdownEditor {
   _scheduleRender(): void { if (this._renderRaf) return; this._renderRaf = requestAnimationFrame(() => { this._renderRaf = null; this._render(); }); }
 
   _render(): void {
-    if (this._mode === 'edit') return;
+    if (this._mode === 'edit') { this._renderGutter(); return; }
     if (this._lastRenderedValue === this._value) return;
     this._lastRenderedValue = this._value;
     MarkdownEditor.trigger('beforeRender', this); this._emit('beforeRender', this);
@@ -603,7 +606,7 @@ export class MarkdownEditor {
     return this;
   }
 
-  setMode(mode: EditMode): this { if (!MODES.includes(mode) || mode === this._mode) return this; const taS = this.textarea.scrollTop; const pvS = this.previewPane.scrollTop; this._mode = mode; this.bodyEl.className = `me-body me-mode-${mode}`; this._updateModeButtons(); if (mode !== 'edit') this._render(); this.textarea.scrollTop = taS; this.previewPane.scrollTop = pvS; this._emit('modeChange', mode); this._announce(`${this.t(mode) || mode} mode`); if (typeof this.config.onModeChange === 'function') { try { this.config.onModeChange(mode, this); } catch (e) { console.error(e); } } return this; }
+  setMode(mode: EditMode): this { if (!MODES.includes(mode) || mode === this._mode) return this; const taS = this.textarea.scrollTop; const pvS = this.previewPane.scrollTop; this._mode = mode; this.bodyEl.className = `me-body me-mode-${mode}`; this._updateModeButtons(); if (mode !== 'edit') { this._render(); this._buildOutline(); } this.textarea.scrollTop = taS; this.previewPane.scrollTop = pvS; this._emit('modeChange', mode); this._announce(`${this.t(mode) || mode} mode`); if (typeof this.config.onModeChange === 'function') { try { this.config.onModeChange(mode, this); } catch (e) { console.error(e); } } return this; }
   getMode(): EditMode { return this._mode; }
 
   _updateModeButtons(): void {
@@ -627,6 +630,7 @@ export class MarkdownEditor {
   _setZen(on: boolean): void {
     this._zenMode = !!on; if (!this.el) return;
     this.el.classList.toggle('me-zen', this._zenMode);
+    this._applyZenWidth();
     if (this._zenMode && this.toolbarEl) {
       if (!this._zenMouseHandler) {
         this._zenMouseHandler = (e: MouseEvent) => { this.toolbarEl.style.opacity = e.clientY < 40 ? '1' : '0'; this.toolbarEl.style.pointerEvents = e.clientY < 40 ? 'auto' : 'none'; };
@@ -643,6 +647,24 @@ export class MarkdownEditor {
   }
   isZen(): boolean { return this._zenMode; }
 
+  _applyZenWidth(): void {
+    if (!this.el) return;
+    const width = this.config.zenMaxWidth;
+    if (width == null || width === false || width === '') {
+      this.el.style.removeProperty('--md-zen-max-width');
+    } else {
+      this.el.style.setProperty('--md-zen-max-width', typeof width === 'number' ? `${width}px` : String(width));
+    }
+  }
+
+  setZenMaxWidth(width: number | string | false): this {
+    this.config.zenMaxWidth = width;
+    this._applyZenWidth();
+    return this;
+  }
+
+  getZenMaxWidth(): number | string | false { return this.config.zenMaxWidth ?? 960; }
+
   toggleWordWrap(): this { this._wordWrap = !this._wordWrap; if (this.textarea) this.textarea.style.whiteSpace = this._wordWrap ? 'pre-wrap' : 'pre'; return this; }
   setWordWrap(on: boolean): this { this._wordWrap = !!on; if (this.textarea) this.textarea.style.whiteSpace = this._wordWrap ? 'pre-wrap' : 'pre'; return this; }
   isWordWrap(): boolean { return this._wordWrap; }
diff --git a/src/index.ts b/src/index.ts
index 748f7f0..b7515a6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,7 @@
 /**
  * MetonaEditor — Type-safe, lightweight Markdown Editor
  * @module metona-editor
- * @version 0.4.0
+ * @version 0.4.1
  */
 
 import { MarkdownEditor } from './core';
@@ -14,7 +14,7 @@ import { highlight, normalizeLanguage, registerLanguage, getSupportedLanguages }
 import { DEFAULTS, ICONS, THEMES, EDIT_MODES, DEFAULT_TOOLBAR, TOOLBAR_ACTIONS } from './constants';
 import type { EditMode, ThemeName, ToolbarItem, EditorOptions } from './constants';
 
-const VERSION = '0.4.0';
+const VERSION = '0.4.1';
 
 const globalPlugins: any[] = [];
 
diff --git a/src/plugins.ts b/src/plugins.ts
index d00545f..23f0b7a 100644
--- a/src/plugins.ts
+++ b/src/plugins.ts
@@ -261,7 +261,9 @@ dl{margin:.8em 0}dt{font-weight:650;margin:.6em 0 .2em}dd{margin:0 0 .3em 1.6em;
       return editor;
     };
   },
-  destroy() {},
+  destroy(editor: EditorLike) {
+    if (editor) { delete (editor as any).exportMarkdown; delete (editor as any).exportHTML; delete (editor as any).exportPDF; }
+  },
 };
 
 const searchReplacePlugin: Plugin = {
@@ -413,6 +415,7 @@ const searchReplacePlugin: Plugin = {
         }
         editor._value = ta.value; if (typeof editor._pushHistory === 'function') editor._pushHistory();
         if (typeof editor._render === 'function') editor._render();
+        if (typeof editor._updateWordCount === 'function') editor._updateWordCount();
         if (typeof editor._emit === 'function') editor._emit('change', editor._value);
         findNext();
       };
@@ -425,6 +428,7 @@ const searchReplacePlugin: Plugin = {
         ta.setSelectionRange(0,0); editor._value = ta.value;
         if (typeof editor._pushHistory === 'function') editor._pushHistory();
         if (typeof editor._render === 'function') editor._render();
+        if (typeof editor._updateWordCount === 'function') editor._updateWordCount();
         if (typeof editor._emit === 'function') editor._emit('change', editor._value);
         findAll();
       };
diff --git a/src/styles.ts b/src/styles.ts
index 40af613..c5970c4 100644
--- a/src/styles.ts
+++ b/src/styles.ts
@@ -139,7 +139,7 @@ const generateCSS = (): string => {
 .me-outline-l2 a{padding-left:12px}
 .me-outline-l3 a{padding-left:20px;font-size:12px}
 .me-outline-l4 a{padding-left:28px;font-size:12px}
-.me-wrapper.me-zen .me-body{max-width:820px;margin:0 auto}
+.me-wrapper.me-zen .me-body{max-width:var(--md-zen-max-width,960px);margin:0 auto}
 .me-wrapper.me-zen .me-textarea{font-size:15px;line-height:1.8}
 .me-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
 @media print{.me-wrapper{border:0!important;box-shadow:none!important}
diff --git a/tests/core.test.ts b/tests/core.test.ts
index ea24d4d..376e269 100644
--- a/tests/core.test.ts
+++ b/tests/core.test.ts
@@ -1768,6 +1768,59 @@ describe('MarkdownEditor - v0.2.0 outline 构建', () => {
   });
 });
 
+describe('MarkdownEditor - v0.4.1 outline 启动初始化', () => {
+  test('outline: true 构造后自动构建面板（无需手动调用）', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: '# H1\n## H2', outline: true, mode: 'split' });
+    const panel = ed.el.querySelector('.me-outline');
+    expect(panel).not.toBeNull();
+    expect(panel!.querySelectorAll('a').length).toBe(2);
+    ed.destroy();
+  });
+
+  test('outline: true + edit 模式构造后切换 split 自动构建面板', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: '# H1', outline: true, mode: 'edit' });
+    expect(ed.el.querySelector('.me-outline')).toBeNull();
+    ed.setMode('split');
+    expect(ed.el.querySelector('.me-outline')).not.toBeNull();
+    ed.destroy();
+  });
+
+  test('outline: false 构造后不创建面板', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: '# H1', outline: false, mode: 'split' });
+    expect(ed.el.querySelector('.me-outline')).toBeNull();
+    ed.destroy();
+  });
+});
+
+describe('MarkdownEditor - v0.4.1 edit 模式初始行号', () => {
+  test('edit 模式构造后 gutter 已渲染行号', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: 'a\nb\nc', mode: 'edit' });
+    expect(ed.gutter.children.length).toBe(3);
+    ed.destroy();
+  });
+
+  test('preview 模式构造后 gutter 也渲染行号', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: 'a\nb\nc\nd', mode: 'preview' });
+    expect(ed.gutter.children.length).toBe(4);
+    ed.destroy();
+  });
+});
+
 describe('MarkdownEditor - v0.2.0 gutter 更新', () => {
   test('gutter 行数不变时跳过 DOM 更新', () => {
     document.body.innerHTML = '';
@@ -2723,6 +2776,94 @@ describe('MarkdownEditor - v0.2.5 zenMode 初始状态', () => {
   });
 });
 
+describe('MarkdownEditor - v0.4.1 zenMaxWidth 专注模式宽度', () => {
+  test('默认 zenMaxWidth 为 960', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, {});
+    expect(ed.getZenMaxWidth()).toBe(960);
+    ed.destroy();
+  });
+
+  test('配置 zenMaxWidth 数字转为 px 并写入 CSS 变量', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { zenMaxWidth: 1200 });
+    expect(ed.getZenMaxWidth()).toBe(1200);
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('1200px');
+    ed.destroy();
+  });
+
+  test('配置 zenMaxWidth 字符串原样写入 CSS 变量', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { zenMaxWidth: 'min(1200px, 90%)' });
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('min(1200px, 90%)');
+    ed.destroy();
+  });
+
+  test('配置 zenMaxWidth: false 清除 CSS 变量（不限制宽度）', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { zenMaxWidth: false });
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('');
+    ed.destroy();
+  });
+
+  test('setZenMaxWidth 运行时更新宽度且仅在 zen 时生效类', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, {});
+    ed.setZenMaxWidth(1080);
+    expect(ed.getZenMaxWidth()).toBe(1080);
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('1080px');
+    ed.setZenMaxWidth(false);
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('');
+    ed.setZenMaxWidth('60vw');
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('60vw');
+    ed.destroy();
+  });
+
+  test('zenMode: true 启动时应用 zenMaxWidth 变量', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { zenMode: true, zenMaxWidth: 1000 });
+    expect(ed.isZen()).toBe(true);
+    expect(ed.el.style.getPropertyValue('--md-zen-max-width')).toBe('1000px');
+    ed.destroy();
+  });
+});
+
+describe('MarkdownEditor - v0.4.1 wordWrap: false 配置生效', () => {
+  test('wordWrap: false 初始 whiteSpace 为 pre', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { wordWrap: false });
+    expect(ed.isWordWrap()).toBe(false);
+    expect(ed.textarea.style.whiteSpace).toBe('pre');
+    ed.toggleWordWrap();
+    expect(ed.isWordWrap()).toBe(true);
+    expect(ed.textarea.style.whiteSpace).toBe('pre-wrap');
+    ed.destroy();
+  });
+
+  test('默认 wordWrap 为 true', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, {});
+    expect(ed.isWordWrap()).toBe(true);
+    ed.destroy();
+  });
+});
+
 describe('MarkdownEditor - v0.2.5 分隔条实例隔离', () => {
   test('分隔条位置按实例 id 保存', () => {
     localStorage.clear();
diff --git a/tests/index.test.ts b/tests/index.test.ts
index 9a58d98..6bd601f 100644
--- a/tests/index.test.ts
+++ b/tests/index.test.ts
@@ -29,7 +29,7 @@ describe('index.ts - 全局 API', () => {
 
   test('VERSION 是字符串', () => {
     expect(typeof VERSION).toBe('string');
-    expect(VERSION).toBe('0.4.0');
+    expect(VERSION).toBe('0.4.1');
   });
 
   test('api.default 是 api 本身', () => {
diff --git a/tests/plugins.test.ts b/tests/plugins.test.ts
index bd79033..4500dc0 100644
--- a/tests/plugins.test.ts
+++ b/tests/plugins.test.ts
@@ -1239,6 +1239,32 @@ describe('v0.2.5 exportTool exportPDF', () => {
   });
 });
 
+describe('v0.4.1 exportTool 卸载清理', () => {
+  test('unuse 后实例上的导出方法被删除', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: '# hi' });
+    ed.use('exportTool');
+    expect(typeof (ed as any).exportMarkdown).toBe('function');
+    ed.unuse('exportTool');
+    expect((ed as any).exportMarkdown).toBeUndefined();
+    expect((ed as any).exportHTML).toBeUndefined();
+    expect((ed as any).exportPDF).toBeUndefined();
+    ed.destroy();
+  });
+
+  test('destroy 时实例上的导出方法被删除', () => {
+    document.body.innerHTML = '';
+    const c = document.createElement('div');
+    document.body.appendChild(c);
+    const ed = new MarkdownEditor(c, { value: '# hi', plugins: ['exportTool'] });
+    expect(typeof (ed as any).exportMarkdown).toBe('function');
+    ed.destroy();
+    expect((ed as any).exportMarkdown).toBeUndefined();
+  });
+});
+
 describe('v0.2.5 imagePaste 尺寸限制', () => {
   test('超出 maxSizeKB 时 toast 警告且不插入', () => {
     document.body.innerHTML = '';