- add Saved Messages system chat with dedicated API
- add public group/channel metadata and discover/join endpoints
- add chat delete flow with for_all option and channel-wide delete
- switch message actions to context menu and improve reply/forward visuals
- improve microphone permission handling for voice recording
- add reply_to/forwarded_from message fields and chat pinned_message field
- add forward and pin APIs plus reply support in message create
- wire web actions: Reply, Fwd, Pin and reply composer state
- fix spam policy bug: allow repeated identical messages, keep rate limiting
- optimistic sending state with pending clock icon
- transition statuses sent -> delivered -> read via realtime events
- render checkmarks next to outgoing message timestamps
- make minio bucket downloadable for direct media links
- switch object keys to random uuid-based names
- add client-side image compression before upload
- add media preview and upload confirmation for image/video
- add upload progress tracking for presigned uploads
- keep voice recording/upload flow with better UI states
- include related realtime/chat updates currently in working tree