- discord-gateway: add redis command handlers for guilds:list, guilds:text-channels, voice:channels - backend: replace postgres synthetic names with redis commands to gateway (with fallback) - frontend: remove guild/channel dropdowns from messages and analytics tabs - frontend: auto-load all channels from monitor guild via guildId query param - frontend: show guild name in messages/analytics headers instead of selector - live tab: keeps guild/channel selectors with real discord names Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>