trunk
Reader Social: filter chips, date dividers, and stacking on Notifications tab (#110675)
Reader Mastodon: image attachments composer (CM-676) (#110508)
Reader: Add /reader/atmosphere (Bluesky) and /reader/mastodon panes (slice 1) (#110081)
Reader Mastodon: handle hide_collections + partial-followers notice (CM-723) (#110681)