- replace modal message search with header inline search controls
- add global top audio bar linked to active inline audio player
- improve chat info header variants and light theme readability
- add chat_updated realtime event and dynamic chat subscriptions
- auto-join invite links in web app
- implement Telegram-like settings panel (general/notifications/privacy)
- add browser notification preferences and keyboard send mode
- improve chat list with last message preview/time and online badge
- rework chat members UI with context actions and role crowns
- add user last_seen_at with alembic migration and persist on realtime disconnect
- extend chat serialization with private online/last_seen, group members/online, channel subscribers
- add Redis batch presence lookup helper
- update web chat list/header to display status counters and last-seen labels
- improve delivery receipt handling using last_delivered/last_read boundaries
- include chat info panel and related API/type updates
- 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
