[Bug] API cost metrics displayed without extra-usage enabled

Bug Description
/usage says:

Session
   Total cost:            $2.43
   Total duration (API):  3m 32s

Even though I don't have extra usage enabled:

Extra usage
   Extra usage not enabled · /extra-usage to enable

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.126
• Feedback ID: 1f432297-c481-4b6b-8493-19189db24ee4

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/azolotov/.local/share/claude/versions/2.1.126 (expected in multi-process scenarios)\n    at r86 (/$bunfs/root/src/entrypoints/cli.js:2768:2177)\n    at HD8 (/$bunfs/root/src/entrypoints/cli.js:2768:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-03T19:08:39.979Z"}]