- Track when others read messages via messages_read WS event - Show Check (single) for sent, CheckCheck (double) only when read - Send push to all recipients, SW suppresses if app is focused Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Profile modal: upload/remove user avatar, edit name/bio/phone, change password - Chat info panel: upload/remove chat photo (owner/admin only) - Avatar component: render photo when available, fallback to initials - Session fix: initialize Zustand store from localStorage to prevent redirect on refresh - Backend: avatar upload endpoints for users and chats, migration adds avatar columns Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
