feat(byok): add Xiaomi Token Plan AMS and SGP direct BYOK providers

[kilo-code-bot]

Summary

• Add two new direct BYOK providers: xiaomi-token-plan-ams (Europe) and xiaomi-token-plan-sgp (Singapore), both pointing at Xiaomi's token-plan-*.xiaomimimo.com/v1 OpenAI-compatible endpoints.
• Share the MiMo model catalog between both regions in xiaomi-token-plan-models.ts. Metadata downloaded from https://models.dev/api.json. The TTS model is intentionally omitted because its output modality is audio and it is not usable through chat completions.
• Register the new IDs in DirectUserByokInferenceProviderIdSchema, UserByokTestModels, and DIRECT_BYOK_PROVIDERS_META so the BYOK key manager UI surfaces them.

Verification

• N/A — pre-push checks skipped per request; please run the standard pnpm checks before merge.

Visual Changes

N/A — no UI surface changes beyond two extra entries in the existing BYOK provider dropdown sourced from DIRECT_BYOK_PROVIDERS_META.

Reviewer Notes

• transformRequest is a no-op for these providers; we did not add a vendor-specific thinking flag (unlike byteplus-coding/kimi-coding) because Xiaomi's docs were not consulted to confirm that field. Reasoning is exposed via REASONING_VARIANTS_BINARY so users can toggle on/off through the standard variant mechanism.
• Models with image input modality (mimo-v2.5, mimo-v2-omni) are flagged vision. mimo-v2.5 and mimo-v2.5-pro are flagged recommended.
• Test model for both providers is mimo-v2-flash.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

All three commits reviewed: initial provider registration, models.dev sync refactor, and a cosmetic label update ('Xiaomi' → 'Xiaomi (pay as you go)') to distinguish the existing BYOK provider from the new Token Plan entries. No bugs, security issues, or logic errors found across any commit.

Files Reviewed (7 files)

• apps/web/src/lib/ai-gateway/providers/direct-byok/xiaomi-token-plan-ams.ts — refactored to cachedEnhancedDirectByokModelList
• apps/web/src/lib/ai-gateway/providers/direct-byok/xiaomi-token-plan-sgp.ts — refactored to cachedEnhancedDirectByokModelList
• apps/web/src/lib/ai-gateway/providers/direct-byok/xiaomi-token-plan-models.ts — deleted (replaced by dynamic fetch)
• apps/web/src/lib/ai-gateway/providers/direct-byok/sync-direct-byok.ts — added modelsDevFetcher entries for both providers
• apps/web/src/lib/ai-gateway/providers/direct-byok/direct-byok-definitions.ts — registration (unchanged from first commit)
• apps/web/src/lib/ai-gateway/providers/openrouter/inference-provider-id.ts — schema + test models (unchanged from first commit)
• apps/web/src/components/organizations/byok/BYOKKeysManager.tsx — label updated to 'Xiaomi (pay as you go)'

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_{Reviewed by claude-4.6-sonnet-20260217 · 187,277 tokens}

_{Review guidance: REVIEW.md from base branch main}