[FEATURE]: Conversation outline / prompt navigation for long chats

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Describe the enhancement you want to request

Feature request: Conversation outline / prompt navigation for long chats

Summary

When working with an AI coding agent for a long session (debugging, refactoring, architecture discussion, documentation, etc.), it becomes increasingly difficult to navigate back to previous questions or topics.

I would love to have a Conversation Outline (or Prompt Navigation) panel similar to ChatGPT’s conversation outline.

Problem

In long conversations, I often ask dozens of questions such as:

• API design
• debugging
• architecture decisions
• Git operations
• deployment
• performance optimization

Scrolling through hundreds of messages to find a previous question is inefficient.

Proposed solution

Add a collapsible sidebar that automatically generates a list of user prompts/topics and allows one-click navigation to that point in the conversation.

For example:

• API design
• Fix build error
• Git rebase question
• Performance optimization
• Database migration
• Deployment issue

Clicking an item should immediately jump to the corresponding message.

Why this matters

For coding agents, conversations are often much longer than normal chat sessions. This feature would provide:

• faster navigation
• better context management
• easier revisiting of previous decisions
• improved productivity during long debugging sessions

I believe this would significantly improve the usability of long-running coding sessions and agent workflows.