[codex] fix quota refresh probe model

[tursom]

修复 OAuth codex 无法刷新额度的问题

Summary by CodeRabbit

• Chores
  • Updated quota verification model configuration for improved compatibility.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 940bdc41-cb1d-47ca-970b-fada90f8e17a

📥 Commits

Reviewing files that changed from the base of the PR and between a2c2ae6 and 3bdc3af.

📒 Files selected for processing (1)

• src/server/services/oauth/quota.ts

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📝 Walkthrough

Walkthrough

Updated the Codex quota probing model configuration in the OAuth service from 'gpt-5.1-codex' to 'gpt-5.4'. This single-line change modifies the model identifier used for quota probe requests without altering any logic or API behavior.

Changes

Cohort / File(s)	Summary
Quota Configuration src/server/services/oauth/quota.ts	Updated CODEX_QUOTA_PROBE_MODEL model value from 'gpt-5.1-codex' to 'gpt-5.4'.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A model swap, so swift and neat,
From 5.1 to 5.4, the upgrade's complete!
One tiny line, but oh so keen,
The finest Codex probe we've seen!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: updating the quota probe model for codex OAuth, which directly addresses the stated objective of fixing quota refresh issues.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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