feat: add md-emfont component and format code

- Add `md-emfont` custom element for dynamic font loading
- Register `md-emfont` in component index
- Reformat `Article.tsx` and `index.ts` using double quotes and
  consistent spacing
- Fix indentation in `index.html`

src/components/Article.tsx

@@ -1,10 +1,17 @@
-import { Component, createEffect, onCleanup, Show, createResource, createMemo } from 'solid-js';
-import { parseMarkdown } from '../markdown';
-import { extractSection } from '../data-loader';
-import mermaid from 'mermaid';
+import {
+  Component,
+  createEffect,
+  onCleanup,
+  Show,
+  createResource,
+  createMemo,
+} from "solid-js";
+import { parseMarkdown } from "../markdown";
+import { extractSection } from "../data-loader";
+import mermaid from "mermaid";
 import { getIndexedData } from "../data-loader/file-index";
-import { resolvePath } from './utils/path';
-import { useLocation } from '@solidjs/router';
+import { resolvePath } from "./utils/path";
+import { useLocation } from "@solidjs/router";
 
 export interface ArticleProps {
   src: string;
@@ -16,7 +23,10 @@ export interface ArticleProps {
   scrollToHash?: boolean; // 是否自动滚动到 hash
 }
 
-async function fetchArticleContent(params: { src: string; section?: string }): Promise<string> {
+async function fetchArticleContent(params: {
+  src: string;
+  section?: string;
+}): Promise<string> {
   const text = await getIndexedData(params.src);
   // 如果指定了 section，提取对应内容
   return params.section ? extractSection(text, params.section) : text;
@@ -28,7 +38,7 @@ async function fetchArticleContent(params: { src: string; section?: string }): P
 function scrollToHash(hash: string) {
   if (!hash) return;
   // 移除 # 前缀
-  const id = hash.startsWith('#') ? hash.slice(1) : hash;
+  const id = hash.startsWith("#") ? hash.slice(1) : hash;
   if (!id) return;
 
   // 使用 decodeURIComponent 解码 ID（处理中文等特殊字符）
@@ -38,7 +48,7 @@ function scrollToHash(hash: string) {
   const element = document.getElementById(decodedId);
   if (element) {
     // 使用 scrollIntoView 滚动到元素
-    element.scrollIntoView({ behavior: 'instant', block: 'start' });
+    element.scrollIntoView({ behavior: "instant", block: "start" });
     return true;
   }
   return false;
@@ -52,12 +62,12 @@ export const Article: Component<ArticleProps> = (props) => {
   const location = useLocation();
   const [content, { refetch }] = createResource(
     () => ({ src: props.src, section: props.section }),
-    fetchArticleContent
+    fetchArticleContent,
   );
 
   // 解析 iconPath，默认为 "./assets"，空字符串表示禁用
   const iconPrefix = createMemo(() => {
-    if (props.iconPath === '') return undefined;  // 空字符串禁用图标前缀
+    if (props.iconPath === "") return undefined; // 空字符串禁用图标前缀
     return resolvePath(props.src, props.iconPath ?? "./assets");
   });
 
@@ -78,7 +88,7 @@ export const Article: Component<ArticleProps> = (props) => {
   });
 
   return (
-    <article class={`prose ${props.class || ''}`} data-src={props.src}>
+    <article class={`prose ${props.class || ""}`} data-src={props.src}>
       <Show when={content.loading}>
         <div class="text-gray-500">加载中...</div>
       </Show>
@@ -86,7 +96,10 @@ export const Article: Component<ArticleProps> = (props) => {
         <div class="text-red-500">加载失败：{content.error?.message}</div>
       </Show>
       <Show when={!content.loading && !content.error && content()}>
-        <div class="relative" innerHTML={parseMarkdown(content()!, iconPrefix())} />
+        <div
+          class="relative"
+          innerHTML={parseMarkdown(content()!, iconPrefix())}
+        />
       </Show>
     </article>
   );

src/components/index.ts

@@ -1,28 +1,30 @@
 // 导入自定义元素以注册
-import './md-dice';
-import './md-table';
-import './md-link';
-import './md-pins';
-import './md-bg';
-import './md-deck';
-import './md-commander/index';
-import './md-yarn-spinner';
-import './md-token';
-import './md-token-viewer';
+import "./md-dice";
+import "./md-table";
+import "./md-link";
+import "./md-pins";
+import "./md-bg";
+import "./md-emfont";
+import "./md-deck";
+import "./md-commander/index";
+import "./md-yarn-spinner";
+import "./md-token";
+import "./md-token-viewer";
 
 // 导出组件
-export { Article } from './Article';
-export type { ArticleProps } from './Article';
-export { MobileSidebar, DesktopSidebar } from './Sidebar';
-export type { SidebarProps } from './Sidebar';
-export { FileTreeNode, HeadingNode } from './FileTree';
+export { Article } from "./Article";
+export type { ArticleProps } from "./Article";
+export { MobileSidebar, DesktopSidebar } from "./Sidebar";
+export type { SidebarProps } from "./Sidebar";
+export { FileTreeNode, HeadingNode } from "./FileTree";
 
 // 导出数据类型
-export type { DiceProps } from './md-dice';
-export type { TableProps } from './md-table';
-export type { BgProps } from './md-bg';
-export type { YarnSpinnerProps } from './md-yarn-spinner';
-export type { TokenProps } from './md-token';
+export type { DiceProps } from "./md-dice";
+export type { TableProps } from "./md-table";
+export type { BgProps } from "./md-bg";
+export type { EmfontProps } from "./md-emfont";
+export type { YarnSpinnerProps } from "./md-yarn-spinner";
+export type { TokenProps } from "./md-token";
 
 // 导出 md-commander 相关
 export type {
@@ -39,10 +41,13 @@ export type {
   TrackerAttributeType,
   TrackerCommand,
   TrackerViewMode,
-} from './md-commander/types';
-export { TabBar } from './md-commander/TabBar';
-export { TrackerView } from './md-commander/TrackerView';
-export { CommanderEntries } from './md-commander/CommanderEntries';
-export { CommanderInput } from './md-commander/CommanderInput';
-export { useCommander } from './md-commander/hooks';
-export { initializeCommands, getCommands } from './md-commander/stores/commandsStore';
+} from "./md-commander/types";
+export { TabBar } from "./md-commander/TabBar";
+export { TrackerView } from "./md-commander/TrackerView";
+export { CommanderEntries } from "./md-commander/CommanderEntries";
+export { CommanderInput } from "./md-commander/CommanderInput";
+export { useCommander } from "./md-commander/hooks";
+export {
+  initializeCommands,
+  getCommands,
+} from "./md-commander/stores/commandsStore";

src/components/md-emfont.tsx

@@ -0,0 +1,59 @@
+import { customElement, noShadowDOM } from "solid-element";
+import { createEffect, onCleanup } from "solid-js";
+
+export interface EmfontProps {
+  weight?: string;
+  words?: string;
+}
+
+customElement(
+  "md-emfont",
+  { weight: "400", words: "" },
+  (props, { element }) => {
+    noShadowDOM();
+
+    // 从 element 的 textContent 获取字体名称
+    const font = element?.textContent?.trim() || "";
+
+    // 隐藏原始文本内容
+    if (element) {
+      element.textContent = "";
+    }
+
+    // 从父节点 article 获取当前 article 元素
+    const articleEl = element?.closest("article") as HTMLElement;
+
+    // 构建 emfont CSS URL
+    const weight = props.weight || "400";
+    // 从 article 文本内容中提取唯一字符作为 words，用于字体子集化
+    const words =
+      props.words || [...new Set(articleEl?.textContent || "")].join("");
+    const linkHref = `https://font.emtech.cc/css/${font}?weight=${weight}&words=${encodeURIComponent(words)}`;
+
+    // 创建 <link> 元素并注入 <head>
+    const linkEl = document.createElement("link");
+    linkEl.rel = "stylesheet";
+    linkEl.href = linkHref;
+    linkEl.dataset.mdEmfont = font;
+    document.head.appendChild(linkEl);
+
+    createEffect(() => {
+      if (!articleEl) return;
+      articleEl.dataset.mdEmfont = font;
+      articleEl.style.fontFamily = font;
+    });
+
+    onCleanup(() => {
+      // 清理 article 上的样式
+      if (articleEl?.dataset?.mdEmfont === font) {
+        articleEl.style.fontFamily = "";
+      }
+      // 移除注入的 <link>
+      if (linkEl.parentNode) {
+        linkEl.parentNode.removeChild(linkEl);
+      }
+    });
+
+    return null;
+  },
+);

src/index.html

@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="zh-CN">
     <head>
         <meta charset="UTF-8" />