Status bar shows wrong model after /compact (shows Opus when session is Sonnet)

Bug Description

After running /compact, the status bar in the header displays the wrong model — showing Opus 4.6 — even though the active session model is Sonnet 4.6.

Steps to Reproduce

1. Start a Claude Code session (default model: Opus 4.6)
2. Run /model sonnet to switch to Sonnet 4.6
3. Run /compact to compact the conversation
4. Observe the status bar after compaction

Expected Behavior

Status bar should show Sonnet 4.6 (the model set via /model before compaction).

Actual Behavior

Status bar shows Opus 4.6 after compaction completes.

However, running /model in the prompt correctly shows currently Sonnet 4.6, confirming the active model is correct.

Screenshots / Evidence

• Header after compact: Opus 4.6 (1M context) with medium effort · Claude Max
• /model command output: Set the AI model for Claude Code (currently Sonnet 4.6)

Additional Context

• Claude Code version: v2.1.85
• Subscription: Claude Max
• The discrepancy suggests /compact may internally use Opus 4.6 to generate the summary (regardless of the current session model), and the status bar reflects the model used for compaction rather than the current session model.
• This is confusing and may also explain unexpectedly high token consumption for Max users, since the compact operation itself may run on Opus even when the user has switched to Sonnet to conserve quota.

Possible Issues

1. /compact uses Opus internally even when session model is Sonnet
2. Status bar doesn't update to reflect current session model after compaction
3. Or both of the above