feat: enhance Links type bookmarks with OpenGraph data

- Add opengraphEnhancer service using fetch-opengraph library
- Enhance ReadItems with proper titles, descriptions, and cover images
- Update deriveLinksFromBookmarks to use async OpenGraph enhancement
- Add caching and batching to avoid overwhelming external services
- Improve bookmark card display with rich metadata from OpenGraph tags

src/components/Me.tsx

@@ -280,8 +280,8 @@ const Me: React.FC<MeProps> = ({
     try {
       if (!hasBeenLoaded) setLoading(true)
       
-      // Derive links from bookmarks immediately (bookmarks come from centralized loading in App.tsx)
-      const initialLinks = deriveLinksFromBookmarks(bookmarks)
+      // Derive links from bookmarks with OpenGraph enhancement
+      const initialLinks = await deriveLinksFromBookmarks(bookmarks)
       const initialMap = new Map(initialLinks.map(item => [item.id, item]))
       setLinksMap(initialMap)
       setLinks(initialLinks)

src/services/opengraphEnhancer.ts

@@ -0,0 +1,117 @@
+import { fetch } from 'fetch-opengraph'
+import { ReadItem } from './readsService'
+
+// Cache for OpenGraph data to avoid repeated requests
+const ogCache = new Map<string, any>()
+const CACHE_TTL = 7 * 24 * 60 * 60 * 1000 // 7 days
+
+interface CachedOgData {
+  data: any
+  timestamp: number
+}
+
+function getCachedOgData(url: string): any | null {
+  const cached = ogCache.get(url)
+  if (!cached) return null
+  
+  const age = Date.now() - cached.timestamp
+  if (age > CACHE_TTL) {
+    ogCache.delete(url)
+    return null
+  }
+  
+  return cached.data
+}
+
+function setCachedOgData(url: string, data: any): void {
+  ogCache.set(url, {
+    data,
+    timestamp: Date.now()
+  })
+}
+
+/**
+ * Enhances a ReadItem with OpenGraph data
+ * Only fetches if the item doesn't already have good metadata
+ */
+export async function enhanceReadItemWithOpenGraph(item: ReadItem): Promise<ReadItem> {
+  // Skip if we already have good metadata
+  if (item.title && item.title !== fallbackTitleFromUrl(item.url || '') && item.image) {
+    return item
+  }
+  
+  if (!item.url) return item
+  
+  try {
+    // Check cache first
+    let ogData = getCachedOgData(item.url)
+    
+    if (!ogData) {
+      // Fetch OpenGraph data
+      ogData = await fetch(item.url)
+      setCachedOgData(item.url, ogData)
+    }
+    
+    if (!ogData) return item
+    
+    // Enhance the item with OpenGraph data
+    const enhanced: ReadItem = { ...item }
+    
+    // Use OpenGraph title if we don't have a good title
+    if (!enhanced.title || enhanced.title === fallbackTitleFromUrl(item.url)) {
+      enhanced.title = ogData['og:title'] || ogData['twitter:title'] || ogData.title || enhanced.title
+    }
+    
+    // Use OpenGraph description if we don't have a summary
+    if (!enhanced.summary) {
+      enhanced.summary = ogData['og:description'] || ogData['twitter:description'] || ogData.description
+    }
+    
+    // Use OpenGraph image if we don't have an image
+    if (!enhanced.image) {
+      enhanced.image = ogData['og:image'] || ogData['twitter:image'] || ogData.image
+    }
+    
+    return enhanced
+  } catch (error) {
+    console.warn('Failed to enhance ReadItem with OpenGraph data:', error)
+    return item
+  }
+}
+
+/**
+ * Enhances multiple ReadItems with OpenGraph data in parallel
+ * Uses batching to avoid overwhelming the service
+ */
+export async function enhanceReadItemsWithOpenGraph(items: ReadItem[]): Promise<ReadItem[]> {
+  const BATCH_SIZE = 5
+  const BATCH_DELAY = 1000 // 1 second between batches
+  
+  const enhancedItems: ReadItem[] = []
+  
+  for (let i = 0; i < items.length; i += BATCH_SIZE) {
+    const batch = items.slice(i, i + BATCH_SIZE)
+    
+    // Process batch in parallel
+    const batchPromises = batch.map(item => enhanceReadItemWithOpenGraph(item))
+    const batchResults = await Promise.all(batchPromises)
+    enhancedItems.push(...batchResults)
+    
+    // Add delay between batches to be respectful to the service
+    if (i + BATCH_SIZE < items.length) {
+      await new Promise(resolve => setTimeout(resolve, BATCH_DELAY))
+    }
+  }
+  
+  return enhancedItems
+}
+
+// Helper function to generate fallback title from URL
+function fallbackTitleFromUrl(url: string): string {
+  try {
+    const urlObj = new URL(url)
+    return urlObj.hostname.replace('www.', '')
+  } catch {
+    return url
+  }
+}

src/utils/linksFromBookmarks.ts

@@ -2,13 +2,14 @@ import { Bookmark } from '../types/bookmarks'
 import { ReadItem } from '../services/readsService'
 import { KINDS } from '../config/kinds'
 import { fallbackTitleFromUrl } from './readItemMerge'
+import { enhanceReadItemsWithOpenGraph } from '../services/opengraphEnhancer'
 
 /**
  * Derives ReadItems from bookmarks for external URLs:
  * - Web bookmarks (kind:39701)
  * - Any bookmark with http(s) URLs in content or urlReferences
  */
-export function deriveLinksFromBookmarks(bookmarks: Bookmark[]): ReadItem[] {
+export async function deriveLinksFromBookmarks(bookmarks: Bookmark[]): Promise<ReadItem[]> {
   const linksMap = new Map<string, ReadItem>()
   
   const allBookmarks = bookmarks.flatMap(b => b.individualBookmarks || [])
@@ -59,11 +60,14 @@ export function deriveLinksFromBookmarks(bookmarks: Bookmark[]): ReadItem[] {
     }
   }
   
-  // Sort by most recent bookmark activity
-  return Array.from(linksMap.values()).sort((a, b) => {
+  // Get initial items sorted by most recent bookmark activity
+  const initialItems = Array.from(linksMap.values()).sort((a, b) => {
     const timeA = a.readingTimestamp || 0
     const timeB = b.readingTimestamp || 0
     return timeB - timeA
   })
+  
+  // Enhance with OpenGraph data
+  return await enhanceReadItemsWithOpenGraph(initialItems)
 }