fix: extract description from web bookmark content field

- Web bookmarks (kind:39701) store description in content field, not summary tag
- Update linksFromBookmarks.ts to check content field for web bookmarks
- Maintain backward compatibility with regular bookmarks using summary tag
- Fixes description display for web bookmarks in Links tab

src/utils/linksFromBookmarks.ts

@@ -40,6 +40,11 @@ export async function deriveLinksFromBookmarks(bookmarks: Bookmark[]): Promise<R
     const summary = bookmark.tags.find(t => t[0] === 'summary')?.[1]
     const image = bookmark.tags.find(t => t[0] === 'image')?.[1]
     
+    // For web bookmarks (kind:39701), description is stored in content field, not summary tag
+    const description = bookmark.kind === KINDS.WebBookmark && bookmark.content 
+      ? bookmark.content.trim() 
+      : summary
+    
     // Create ReadItem for each unique URL
     for (const url of [...new Set(urls)]) {
       if (!linksMap.has(url)) {
@@ -49,7 +54,7 @@ export async function deriveLinksFromBookmarks(bookmarks: Bookmark[]): Promise<R
           type: 'external',
           url,
           title: title || fallbackTitleFromUrl(url),
-          summary,
+          summary: description,
           image,
           readingProgress: 0,
           readingTimestamp: bookmark.created_at ?? undefined