Feature Request: Show input/output token breakdown in session cost display

Current Behavior

The session cost display at the bottom of the chat shows the total cost for the current session, but does not provide a breakdown of token usage.

Requested Enhancement

Add a breakdown of token usage showing:

• Input tokens used
• Output tokens used
• Total tokens (existing)

Use Case

This would provide better visibility into token consumption patterns and help users understand:

• How much of their usage comes from input (context/prompts) vs output (responses)
• Which types of interactions are more token-intensive
• How to optimize their usage patterns

Example Display

Current: Session cost: $0.45

Proposed: Session cost: $0.45 (Input: 35,000 tokens, Output: 5,000 tokens)

or

Session cost: $0.45
├─ Input tokens: 35,000
└─ Output tokens: 5,000

Additional Context

This information would be particularly helpful for:

• Users trying to optimize their token usage
• Understanding the cost breakdown between different types of operations
• Debugging unexpectedly high costs

Thank you for considering this enhancement!