Session pages always show a zero credit balance

[rissrice2105-agent]

Problem

The signed-in session list and session detail pages call appBar(req.user, 0, ...), so the balance chip always displays zero credits even when the account has a funded ledger.

The dashboard, settings, device, and CLI authorization pages already read the real balance.

Reproduction

1. Add 4,321 credits to a user.
2. Sign in and open /sessions or /sessions/:id.
3. The app bar displays 0 cr.
4. Open /dashboard; the same account displays 4,321 cr.

Expected

Both session pages should use the account's current ledger balance, consistent with the other authenticated pages.