fix: suggest lower reasoning effort on gateway timeouts

[chrarnoldus]

Summary

• Add API-specific reasoning effort extraction for Chat Completions, Responses, and Messages.
• Suggest lowering xhigh/max effort to high or lower on gateway-generated timeout errors, including interrupted responses that already mention possible timeouts.
• Preserve error envelopes, status codes, request IDs, and non-timeout fetch failures; add regression coverage for extraction and JSON/SSE errors.

Validation

• Changed-file formatting, oxlint, and git diff --check passed.
• Local web typecheck exceeded the 120-second environment limit (local Node is 22; repository requires 24); CI will verify types.
• Tests intentionally left to CI as requested.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (7 files)

• apps/web/src/lib/ai-gateway/providers/openrouter/request-helpers.ts
• apps/web/src/lib/ai-gateway/providers/upstream-attempt.ts
• apps/web/src/lib/ai-gateway/providers/upstream-request.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.ts
• apps/web/src/tests/openrouter-request-helpers.test.ts
• apps/web/src/tests/openrouterApi.timeout.test.ts

Previous Review Summary (commit 0a98fd7)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 0a98fd7)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (7 files)

• apps/web/src/lib/ai-gateway/providers/openrouter/request-helpers.ts
• apps/web/src/lib/ai-gateway/providers/upstream-attempt.ts
• apps/web/src/lib/ai-gateway/providers/upstream-request.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.ts
• apps/web/src/tests/openrouter-request-helpers.test.ts
• apps/web/src/tests/openrouterApi.timeout.test.ts

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_{Reviewed by grok-4.6 · Input: 108K · Output: 7.1K · Cached: 187.9K}

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