fix(ci): clear the two TS2677 errors from the API Route Typecheck baseline

[HouMinXi]

Summary

Two TS2677 errors made API Route Typecheck red on release/v3.8.51 (tracked in #13866).

RerankProviderNodeRow was an interface without an index signature, so it could not be assigned to Record<string, unknown> in the type predicate. Converted to a type alias in src/app/api/v1/_shared/rerankProviderNodes.ts.

The catalog .map() return in src/mitm/handlers/antigravity.ts was inferred as { id, displayName, description?: string } | null. Annotated as DynamicCatalogModel | null and spread description only when present.

config/quality/eslint-suppressions.json is not in this PR. #14255 types the Gemini turn-pairing assertions instead of raising the frozen any-count from 74 to 87.

#14164 also edits the two TypeScript files (a NonNullable<typeof c> narrow). Whichever lands first, the other rebases.

Verification

• node scripts/check/check-api-typecheck.mjs: OK, 283 pre-existing, 0 new
• antigravity + rerank unit tests: 29/29

Related to #13866. #13866 stays open.

[diegosouzapw]

Thanks for tracking down both TS2677 root causes precisely — the interface vs Record<string, unknown> incompatibility explanation is spot on. Two things before this can merge: (1) #14255 is also fixing the same translator-openai-to-gemini.test.ts suppression entry, but at the root (bringing the file's violations back under the frozen 74 cap) rather than raising the cap to 87 — could you drop the eslint-suppressions.json hunk here and let that one own it, so we don't end up with a stale over-suppressed entry (cap 87, real 73) once both land? (2) #14244... sorry, #14164 is also independently fixing antigravity.ts and rerankProviderNodes.ts (differently — a NonNullable<typeof c> narrow instead of the type-alias change). Whichever of the two lands first, the other will need a quick rebase to drop the now-redundant hunk. Once the suppressions.json piece is dropped this is a clean, welcome fix for the base-red.

[HouMinXi]

Dropped config/quality/eslint-suppressions.json from this PR. #14255 owns the translator-openai-to-gemini any-count (type the assertions, keep the frozen 74). What's left is the two TS2677 edits plus a changelog fragment.

#14164 is still open and also touches antigravity.ts / rerankProviderNodes.ts. I kept those hunks here. If that PR merges first I will rebase and drop the overlap.

Local: node scripts/check/check-api-typecheck.mjs OK (283 frozen, 0 new). antigravity 16/16, rerank 13/13.

[HouMinXi]

The two TS2677 errors targeted here were resolved in upstream commit d610c24c62 (#14164) using the NonNullable<typeof ...> narrowing approach in both files.

Verified on the latest release/v3.8.51 tip: node scripts/check/check-api-typecheck.mjs passes cleanly with 0 new errors (283 baseline).

Since #14164 already landed the resolution, this PR is superseded.

[diegosouzapw]

Thanks @HouMinXi — the two TS2677 errors this PR cleared from the API Route Typecheck baseline were already resolved on release/v3.8.51 by #14164 (merged 2026-09-21), so this change no longer has anything to fix on the tip. Closing as superseded; your diagnosis matched the fix that landed. (merge-batch 2026-09-24)