fix(acp): match toggleable models case-insensitively

[tt-a1i]

Summary

• normalize model names before checking the ACP toggleable-thinking allow-list
• add a regression test for mixed-case Kimi-Code / Kimi-For-Coding

Related Issue

Addresses #837 finding 7.

Tests

• pnpm --filter @moonshot-ai/acp-adapter exec vitest run test/model-catalog.test.ts
• pnpm --filter @moonshot-ai/acp-adapter run test
• pnpm --filter @moonshot-ai/acp-adapter run typecheck
• pnpm --filter @moonshot-ai/acp-adapter run build
• pnpm --filter @moonshot-ai/kimi-code run typecheck
• pnpm exec oxlint --type-aware packages/acp-adapter/src/model-catalog.ts packages/acp-adapter/test/model-catalog.test.ts --quiet
• git diff --check

AI Assistance Disclosure

I used Codex to review the changes, sanity-check the implementation against existing patterns, and help spot potential edge cases.

[changeset-bot]

🦋 Changeset detected

Latest commit: 682e0f5

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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