fix(copilot): fix copilot chat title

[Sg312]

Summary

Fix copilot not showing chat title during stream

Type of Change

• Bug fix

Testing

How has this been tested? What should reviewers focus on?

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
docs	Skipped		Jan 24, 2026 10:23am

[greptile-apps]

Greptile Summary

Added a new SSE handler title_updated to the copilot store that properly handles chat title updates during streaming. When the server sends a title_updated event, the handler now updates both the currentChat.title and the corresponding entry in the chats array, ensuring UI consistency throughout the streaming process.

• Fixed missing handler for title_updated SSE event in sseHandlers record
• Updates both currentChat and chats array to maintain state consistency
• Follows existing pattern used for optimistic title updates (lines 2790-2795)
• Uses underscore prefix convention for unused parameters (_data, _context)

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change is a straightforward bug fix that adds a missing SSE handler. The implementation follows existing patterns in the codebase (consistent with optimistic title update logic), uses proper immutable state updates, and includes appropriate null checks. No breaking changes, side effects, or edge cases identified.
• No files require special attention

Important Files Changed

Filename	Overview
apps/sim/stores/panel/copilot/store.ts	Added title_updated SSE handler to update chat title during streaming, consistent with existing patterns

Sequence Diagram

sequenceDiagram
    participant Server
    participant SSEHandler
    participant CopilotStore
    participant UI
    
    Note over Server,UI: Chat Title Update Flow
    
    Server->>SSEHandler: title_updated event (with title data)
    SSEHandler->>SSEHandler: Extract title from data
    SSEHandler->>CopilotStore: get() - retrieve currentChat and chats
    
    alt currentChat exists
        SSEHandler->>CopilotStore: set({ currentChat: {...currentChat, title}, chats: updated array })
        CopilotStore->>UI: Re-render with updated title
    else no currentChat
        SSEHandler->>SSEHandler: Early return (no update needed)
    end

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