Filter out notifications for detached quote posts

When a user detaches a quote from their post, the corresponding quote
notification is now filtered out of the notifications feed. This checks
the subject post's embed for a detached record view (both plain record
embeds and record-with-media embeds).

https://claude.ai/code/session_01PmDHPopw2eEkzznxHuDu3N

src/state/queries/notifications/feed.ts

@@ -18,6 +18,8 @@
 
 import {useCallback, useEffect, useMemo, useRef} from 'react'
 import {
+  AppBskyEmbedRecord,
+  AppBskyEmbedRecordWithMedia,
   AppBskyFeedDefs,
   AppBskyFeedPost,
   AtUri,
@@ -188,6 +190,12 @@ export function useNotificationFeedQuery(opts: {
                       hiddenReplyUris.has(item.subjectUri)
                     return !isHiddenReply
                   })
+                  .filter(item => {
+                    if (item.type === 'quote' && item.subject) {
+                      return !hasDetachedQuoteEmbed(item.subject)
+                    }
+                    return true
+                  })
                   .filter(item => {
                     if (
                       item.type === 'reply' ||
@@ -273,6 +281,16 @@ export function useNotificationFeedQuery(opts: {
   return query
 }
 
+function hasDetachedQuoteEmbed(subject: AppBskyFeedDefs.PostView): boolean {
+  if (AppBskyEmbedRecord.isView(subject.embed)) {
+    return AppBskyEmbedRecord.isViewDetached(subject.embed.record)
+  }
+  if (AppBskyEmbedRecordWithMedia.isView(subject.embed)) {
+    return AppBskyEmbedRecord.isViewDetached(subject.embed.record.record)
+  }
+  return false
+}
+
 export function* findAllPostsInQueryData(
   queryClient: QueryClient,
   uri: string,