Add dsh-md-export to the file-viewer plugin catalog

src/client/locales.ts

@@ -364,6 +364,7 @@ export const zh = {
   addPluginsEmpty: '暂未收录插件，欢迎在 GitHub topic 下发布你的插件',
   openPlugin: '跳转',
   copyInstall: '复制安装命令',
+  pluginMdExportDesc: '在 better-sidebar 的 Markdown 工具栏上新增「导出」按钮：一键把当前 .md 渲染为独立 HTML（表格/代码块/Mermaid 图表内联，布局跟随预览主题）直接保存到同目录，或通过打印对话框导出为 PDF',
   pluginOfficeDesc: '为 better-sidebar 编辑器提供 Office 三件套预览（.docx / .xlsx / .pptx），把重型 Office 渲染库拆出主包、按需安装',
   pluginFlowglassDesc: '实时会话流程图：三列泳道展示用户、助手与工具调用，支持并行分组、子代理支线、逐层钻取和实时状态；安装 better-sidebar 后注册原生「流镜」Tab，未安装时保留独立抽屉',
   pluginGitForgeDesc: 'better-sidebar「Git 凭据」Tab：GitHub/Gitea 等 Forge 账号库 + 按项目授权 + push 策略硬拦；token 仅存本地 secrets，不进模型上下文；提供只读 GitForge 工具与 agent HTTPS credential helper',
@@ -724,6 +725,7 @@ export const en: Record<keyof typeof zh, string> = {
   addPluginsEmpty: 'No plugins curated yet — publish yours under the GitHub topic',
   openPlugin: 'Open',
   copyInstall: 'Copy install command',
+  pluginMdExportDesc: 'Adds an "Export" button to the Markdown toolbar in better-sidebar: one click renders the current .md into standalone HTML (tables / code blocks / Mermaid diagrams inlined, layout follows the preview theme) and saves it next to the .md, or exports to PDF via the print dialog',
   pluginOfficeDesc: 'Office-suite preview (.docx / .xlsx / .pptx) for the better-sidebar editor, keeping the heavy Office render libraries out of the core bundle',
   pluginFlowglassDesc: 'Live session flowgraph with three lanes for user, assistant, and tool calls, plus parallel groups, sub-agent branches, drill-down, and live status; registers a native Flowglass tab when better-sidebar is installed and keeps its standalone drawer as a fallback',
   pluginGitForgeDesc: 'Git Forge tab: GitHub/Gitea (and other forge) account library + per-project grants + hard push policy; tokens stay in local secrets (never in model context); read-only GitForge tool and agent HTTPS credential helper',