Title: Show exact dates for sessions in Code tab sidebar, not just Today/Yesterday/Older Body:

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

When grouping sessions by date in the Code tab sidebar, sessions are bucketed into "Today," "Yesterday," and "Older" only. There's no way to see the exact date a session was last worked on without opening it.

Proposed Solution

Request: For sessions in the "Older" bucket (or as an alternative grouping/sort option), show the actual date (e.g., "Sep 3" or "2026-09-03") instead of lumping everything into "Older." Alternatively, a hover tooltip on each session row showing the exact last-activity timestamp would also solve this.

Alternative Solutions

I asked Claude to show the dates, and it suggested this action

Priority

Medium - Would be very helpful

Feature Category

Interactive mode (TUI)

Use Case Example

I want work on a recent session, and it helps to locate it if I can see the last date/time each session was accessed

Additional Context

_No response_