refactor: restructure project configuration and utility modules

- Move configuration and utility files to more organized locations
- Update import paths across the project to reflect new file structure
- Simplify content and internationalization utilities
- Remove redundant configuration files and consolidate logic
- Add prefetch configuration to Astro config for improved performance

src/pages/[lang]/about.astro

@@ -1,11 +1,9 @@
 ---
-import { themeConfig } from '@/config'
 import Layout from '@/layouts/Layout.astro'
+import { generateLanguagePaths } from '@/utils/i18n'
 
 export function getStaticPaths() {
-  return themeConfig.global.moreLocale.map(lang => ({
-    params: { lang },
-  }))
+  return generateLanguagePaths()
 }
 ---
 

src/pages/[lang]/index.astro

@@ -1,12 +1,10 @@
 ---
-import { themeConfig } from '@/config'
 import Layout from '@/layouts/Layout.astro'
-import { getPinnedPosts, getPosts } from '@/utils/content.config'
+import { getPinnedPosts, getPosts } from '@/utils/content'
+import { generateLanguagePaths } from '@/utils/i18n'
 
 export function getStaticPaths() {
-  return themeConfig.global.moreLocale.map(lang => ({
-    params: { lang },
-  }))
+  return generateLanguagePaths()
 }
 
 const { lang } = Astro.params

src/pages/[lang]/posts/[slug].astro

@@ -1,26 +1,18 @@
 ---
-import { themeConfig } from '@/config'
 import Layout from '@/layouts/Layout.astro'
-import { checkSlugDuplication } from '@/utils/content.config'
+import { checkSlugDuplication } from '@/utils/content'
+import { generateMultiLangPostPaths } from '@/utils/i18n'
 import { getCollection } from 'astro:content'
 
 export async function getStaticPaths() {
   const posts = await getCollection('posts')
-  
+
   const duplicates = await checkSlugDuplication(posts)
   if (duplicates.length > 0) {
     throw new Error(`Slug conflicts found:\n${duplicates.join('\n')}`)
   }
 
-  return themeConfig.global.moreLocale.flatMap(lang =>
-    posts.map(post => ({
-      params: {
-        lang,
-        slug: post.data.slug || post.slug,
-      },
-      props: { post },
-    })),
-  )
+  return generateMultiLangPostPaths(posts)
 }
 
 const { post } = Astro.props

src/pages/[lang]/rss.xml.ts

@@ -1,38 +1,8 @@
 import type { APIContext } from 'astro'
-import type { CollectionEntry } from 'astro:content'
 import themeConfig from '@/config'
-import rss from '@astrojs/rss'
-import { getCollection } from 'astro:content'
-import MarkdownIt from 'markdown-it'
-import sanitizeHtml from 'sanitize-html'
+import { generateRSS } from '@/utils/rss'
 
-const parser = new MarkdownIt()
-const { title, description, url } = themeConfig.site
 const { moreLocale } = themeConfig.global
-const followConfig = themeConfig.seo?.follow
-
-// Returns first 200 chars with proper truncation
-function getExcerpt(content: string): string {
-  if (!content)
-    return ''
-
-  // Convert markdown to plain text by removing all HTML tags
-  const plainText = sanitizeHtml(parser.render(content), {
-    allowedTags: [],
-    allowedAttributes: {},
-  })
-
-  const excerpt = plainText.slice(0, 200).trim()
-  return excerpt.length === 200 ? `${excerpt}...` : excerpt
-}
-
-// Return 404 for invalid language paths
-function return404() {
-  return new Response(null, {
-    status: 404,
-    statusText: 'Not found',
-  })
-}
 
 // Type for supported non-default languages
 type SupportedLanguage = typeof moreLocale[number]
@@ -46,43 +16,12 @@ export async function GET({ params }: APIContext) {
   const lang = params.lang as SupportedLanguage
 
   // Return 404 if language is not supported
-  if (!moreLocale.includes(lang))
-    return return404()
+  if (!moreLocale.includes(lang)) {
+    return new Response(null, {
+      status: 404,
+      statusText: 'Not found',
+    })
+  }
 
-  // Get posts for specific language (including universal posts)
-  const posts = await getCollection(
-    'posts',
-    ({ data }: { data: CollectionEntry<'posts'>['data'] }) =>
-      (!data.draft && (data.lang === lang || data.lang === '')),
-  )
-
-  return rss({
-    title: `${title} (${lang})`,
-    description,
-    site: url,
-    items: posts.map((post: CollectionEntry<'posts'>) => ({
-      title: post.data.title,
-      pubDate: post.data.published,
-      description: post.data.description || getExcerpt(post.body),
-      // Generate absolute URL with language prefix
-      link: new URL(`${lang}/posts/${post.data.slug || post.slug}/`, url).toString(),
-      // Convert markdown content to HTML, allowing img tags
-      content: post.body
-        ? sanitizeHtml(parser.render(post.body), {
-            allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
-          })
-        : '',
-    })),
-    // Add XML namespaces for language and follow challenge
-    customData: `
-      <language>${lang}</language>
-      ${followConfig?.feedID && followConfig?.userID
-          ? `<follow_challenge>
-            <feedId>${followConfig.feedID}</feedId>
-            <userId>${followConfig.userID}</userId>
-          </follow_challenge>`
-          : ''
-      }
-    `.trim(),
-  })
+  return generateRSS({ lang })
 }

src/pages/[lang]/tags/[tags].astro

@@ -1,16 +1,11 @@
 ---
-import { themeConfig } from '@/config'
 import Layout from '@/layouts/Layout.astro'
-import { getAllTags, getPostsByTag } from '@/utils/content.config'
+import { getAllTags, getPostsByTag } from '@/utils/content'
+import { generateMultiLangTagPaths } from '@/utils/i18n'
 
 export async function getStaticPaths() {
   const tags = await getAllTags()
-  return themeConfig.global.moreLocale.flatMap(lang =>
-    tags.map(tag => ({
-      params: { lang, tags: tag },
-      props: { tags: tag },
-    })),
-  )
+  return generateMultiLangTagPaths(tags)
 }
 
 const { lang } = Astro.params

src/pages/[lang]/tags/index.astro

@@ -1,12 +1,10 @@
 ---
-import { themeConfig } from '@/config'
 import Layout from '@/layouts/Layout.astro'
-import { getAllTags } from '@/utils/content.config'
+import { getAllTags } from '@/utils/content'
+import { generateLanguagePaths } from '@/utils/i18n'
 
 export function getStaticPaths() {
-  return themeConfig.global.moreLocale.map(lang => ({
-    params: { lang },
-  }))
+  return generateLanguagePaths()
 }
 
 const { lang } = Astro.params
@@ -21,3 +19,4 @@ const allTags = await getAllTags()
       </a>
     ))}
   </div>
+</Layout>