fix: deduplicate React keys in CopilotChatMessageView#4
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…aming During streaming, agent.messages can contain entries with duplicate IDs, causing React key warnings and UI jank. This deduplicates messages in CopilotChat (keeping the last occurrence) and adds index-based keys in CopilotChatMessageView as a defensive guard. Closes CopilotKit#3258 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
agent.messagesinCopilotChat.tsxbefore passing to the view, keeping the last occurrence of each message ID (most up-to-date during streaming)CopilotChatMessageView.tsxas a defensive guard against duplicate IDs from external consumersTest plan
nx run @copilotkitnext/react:testpassesnx run @copilotkitnext/react:buildsucceedskey={message.id}remains in CopilotChatMessageViewCloses CopilotKit#3258
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