refactor(markdown): improve type safety and update comments

Author: SSShooter

src/dev.ts

@@ -10,6 +10,7 @@ import style from '../index.css?raw'
 import katex from '../katex.css?raw'
 import { layoutSSR, renderSSRHTML } from './utils/layout-ssr'
 import { snapdom } from '@zumer/snapdom'
+import type { Tokens } from 'marked'
 import { marked } from 'marked'
 
 interface Window {
@@ -48,7 +49,7 @@ const options: Options = {
   markdown: (text: string) => {
     // Configure marked renderer to add target="_blank" to links
     const renderer = {
-      link(token: any) {
+      link(token: Tokens.Link) {
         const href = token.href || ''
         const title = token.title ? ` title="${token.title}"` : ''
         const text = token.text || ''

src/utils/layout-ssr.ts

@@ -190,10 +190,10 @@ export const renderSSRHTML = function (
         const tagsHtml = node.tags
           .map(tag => {
             if (typeof tag === 'string') {
-              // 兼容原来的字符串配置
+              // Compatible with legacy string configuration
               return `<span class="me-tag">${escapeHtml(tag)}</span>`
             } else {
-              // 支持对象配置
+              // Support object configuration
               let classAttr = 'me-tag'
               if (tag.className) {
                 classAttr += ` ${tag.className}`
@@ -204,7 +204,7 @@ export const renderSSRHTML = function (
                 const styles = Object.entries(tag.style)
                   .filter(([_, value]) => value !== undefined && value !== null && value !== '')
                   .map(([key, value]) => {
-                    // 将驼峰命名转换为CSS属性名
+                    // Convert camelCase to CSS property name
                     const cssKey = key.replace(/([A-Z])/g, '-$1').toLowerCase()
                     return `${cssKey}: ${value}`
                   })