- room-context: dedup by id not seq (streaming seq=0); single atomic
setStreamingContent with delta detection; preserve reactions from WS
- MessageBubble: fix avatar lookup (members before IIFE); handleReaction
deps (no message.reactions); add reactions to wsMessageToUiMessage
- MessageInput: memoize mentionItems; fix upload path with VITE_API_BASE_URL
- IMEditor: warn on upload failure instead of silent swallow
- RoomSettingsPanel: sync form on room switch; loadModels before useEffect
- DiscordChatPanel: extract inline callbacks to useCallback stable refs
