[FEATURE] Add some visual distinction between human and agent messages

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Often in a terminal with long session, it is very hard to sometimes distinguish human prompt and agent response as they both have same font/size/color/weight. Some way to distinguish, maybe a different color or font weight or better yet different side aligned like a chat when two users chat, one is left and one is right aligned. This will make it easier to distinguish.

Bonus feature: Some keymap to quickly navigate up/down between human prompts. Will be useful in a long session.

Proposed Solution

1. Make human prompt and agent response aligned on different side, one on left and another on right.
2. Or, some font color or weight distinction

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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