feat(kimi-code): refresh OAuth provider models before opening model picker

[sailist]

Summary

This PR makes the /model slash command refresh OAuth-backed provider models right before opening the model picker, so newly-available or changed OAuth models show up without forcing a full provider refresh. It introduces a scoped refresh mode so the picker can refresh only OAuth providers, and adds a short timeout so the UI stays responsive even if the refresh hangs.

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1. Refresh OAuth models before opening the model picker

Problem: The /model picker could display stale model lists for OAuth providers because it did not refresh provider models before rendering.

What was done:

• Changed handleModelCommand to async and call refreshOAuthProviderModels() before showing the picker.
• Added a MODEL_PICKER_REFRESH_TIMEOUT_MS (2 s) helper so the picker still opens promptly even if the refresh is slow or fails.
• Surfaced non-fatal refresh failures as warning status messages instead of throwing.

2. Scoped provider model refresh

Problem: refreshAllProviderModels always refreshed every provider, which is unnecessary when the picker only needs OAuth provider data.

What was done:

• Added RefreshProviderScope = 'all' | 'oauth' and RefreshProviderOptions to refresh-providers.ts.
• Updated AuthFlowController with refreshOAuthProviderModels() (scope 'oauth') and kept refreshProviderModels() as 'all'.
• Preserved existing behavior for non-OAuth providers by defaulting the scope to 'all'.

3. Tests

What was done:

• Added tests in test/tui/utils/refresh-providers.test.ts for OAuth-only refresh behavior.
• Updated test/tui/kimi-tui-message-flow.test.ts to cover async model picker rendering after the refresh call.

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Checklist

• I have read the CONTRIBUTING document.
• I have linked the related issue, if any.
• I have added tests that prove my fix is effective or that my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs a doc update.
• I have run make gen-changelog to update the changelog.

[changeset-bot]

🦋 Changeset detected

Latest commit: b0c0e02

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@moonshot-ai/kimi-code	Patch

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commit: b0c0e02