Chat timeline/history to jump to specific messages

[Basit-Balogun10]

Description

Add a way to quickly navigate to specific messages in a long chat conversation, similar to a table of contents or timeline view.

Behavior

• A timeline/history view that lists all messages (or key moments) in the conversation
• Clicking an entry scrolls/jumps to that message in the chat
• Useful for long conversations where scrolling to find a specific exchange is tedious
• Could be a sidebar panel, dropdown, or minimap-style overlay

Acceptance Criteria

• A way to view an overview/index of all messages in the conversation
• Clicking an entry navigates to that message
• Works efficiently even with long conversations