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/rss.xml.ts

@@ -1,65 +1,5 @@
-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'
-
-const parser = new MarkdownIt()
-const { title, description, url } = themeConfig.site
-const { locale } = 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
-}
+import { generateRSS } from '@/utils/rss'
 
 export async function GET() {
-  // Get all posts for default language (including universal posts)
-  const posts = await getCollection(
-    'posts',
-    ({ data }: { data: CollectionEntry<'posts'>['data'] }) =>
-      (!data.draft && (data.lang === locale || data.lang === '')),
-  )
-
-  return rss({
-    title,
-    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 for post
-      link: new URL(`posts/${post.data.slug || post.slug}/`, url).toString(),
-      // Convert markdown content to HTML, allowing img tags
-      content: post.body
-        ? sanitizeHtml(parser.render(post.body), {
-            allowedTags: sanitizeHtml.defaults.allowedTags.concat(['img']),
-          })
-        : '',
-    })),
-    // Add XML namespaces for language and follow challenge
-    customData: `
-      <language>${locale}</language>
-      ${followConfig?.feedID && followConfig?.userID
-          ? `<follow_challenge>
-            <feedId>${followConfig.feedID}</feedId>
-            <userId>${followConfig.userID}</userId>
-          </follow_challenge>`
-          : ''
-      }
-    `.trim(),
-  })
+  return generateRSS()
 }