Leaving the feed keeps it in Services/FeedMemory.cs (posts, waiting posts, cursors and scroll; ten minutes, for the same feed of the same persona), so coming back from a thread or a profile shows it again at once, older pages included, instead of reading it anew; newer posts come behind the "new" button and through the stream as before. tests/e2e FeedMemoryTests goes to a thread and back without a new read of the home timeline; the whole suite passes (123, 5 skipped). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw