refactor: remove synthetic added_at field, use created_at from bookmark list event

src/utils/bookmarkUtils.tsx

@@ -87,7 +87,7 @@ export const renderParsedContent = (parsedContent: ParsedContent) => {
 export const sortIndividualBookmarks = (items: IndividualBookmark[]) => {
   return items
     .slice()
-    .sort((a, b) => ((b.added_at || 0) - (a.added_at || 0)) || ((b.created_at || 0) - (a.created_at || 0)))
+    .sort((a, b) => (b.created_at || 0) - (a.created_at || 0))
 }
 
 export function groupIndividualBookmarks(items: IndividualBookmark[]) {

src/utils/linksFromBookmarks.ts

@@ -51,7 +51,7 @@ export function deriveLinksFromBookmarks(bookmarks: Bookmark[]): ReadItem[] {
           summary,
           image,
           readingProgress: 0,
-          readingTimestamp: bookmark.added_at || bookmark.created_at
+          readingTimestamp: bookmark.created_at
         }
         
         linksMap.set(url, item)

src/utils/readsFromBookmarks.ts

@@ -49,7 +49,7 @@ export function deriveReadsFromBookmarks(bookmarks: Bookmark[]): ReadItem[] {
         source: 'bookmark',
         type: 'article',
         readingProgress: 0,
-        readingTimestamp: bookmark.added_at || bookmark.created_at,
+        readingTimestamp: bookmark.created_at,
         title,
         summary,
         image,