- fix scope bug for refresh agy token

[sarff]

📝 Description

When using antigravity, primary auth succeeds, but the token refresh failed (the scope was passed incorrectly), leading to the error: Error processing message: LLM call failed after retries: antigravity API error (PERMISSION_DENIED): Request had insufficient authentication scopes.

🗣️ Type of Change

• [+] 🐞 Bug fix (non-breaking change which fixes an issue)

🤖 AI Code Generation

• [+] 👨‍💻 Mostly Human-written (Human lead, AI assisted or none)

🔗 Related Issue

None

📚 Technical Context (Skip for Docs)

• Reference URL:
• Reasoning:

🧪 Test Environment

• OS: Docker
• Model/Provider: Antigravity

☑️ Checklist

• [+] My code/docs follow the style of this project.
• [+] I have performed a self-review of my own changes.

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