fix(gateway): rate limit Gastown free models by user

[evanjacobson]

Summary

Gastown free-model usage should not be throttled by a shared infrastructure IP, because one active user can otherwise exhaust the bucket for unrelated users. This change adds Gastown to the existing set of server-side features that use per-user free-model rate limiting, following the same pattern as cloud-agent, code-review, and app-builder.

Verification

No manual UI verification; this is a non-visual gateway attribution change.

Visual Changes

N/A

Reviewer Notes

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The PR adds 'gastown' to the USER_RATE_LIMITED_FEATURES set and the corresponding test assertion, correctly following the established pattern used by cloud-agent, code-review, and app-builder.

Files Reviewed (2 files)

• apps/web/src/lib/feature-detection.ts
• apps/web/src/lib/feature-detection.test.ts

---

Fix these issues in Kilo Cloud

---

_{Reviewed by claude-sonnet-4.6 · 451,726 tokens}

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