- Add dedicated TitlesChannel (0xFFF9) following the VersionChannel pattern
- Server encodes name→title map via EncodeTitlesData/DecodeTitlesData
- Metadata wire format unchanged for backward compatibility with old clients
- All three fetchers (public Telegram, MTProto, X/Nitter) extract and store display names
- Client fetches TitlesChannel with a 10s deadline; falls back to channel handles gracefully on old servers
- Old clients are unaffected — they never query 0xFFF9
- Add DisplayName field to ChannelInfo in the wire protocol
- Add displayNames map to Feed; SetChannelDisplayName no longer mutates
f.channels, keeping handles stable for cache keys and management
- Public fetcher: extract title via extractChannelTitle, pass to feed
- Telegram fetcher: capture ch.Title / user.FirstName from MTProto API
- Frontend: render DisplayName as sidebar label, keep Name as identifier
Sarto