fix(gateway): rate limit Gastown free models by user (#3648)

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

Author: evanjacobson

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

@@ -25,6 +25,7 @@ describe('isUserRateLimitedFeature', () => {
     expect(isUserRateLimitedFeature('cloud-agent')).toBe(true);
     expect(isUserRateLimitedFeature('code-review')).toBe(true);
     expect(isUserRateLimitedFeature('app-builder')).toBe(true);
+    expect(isUserRateLimitedFeature('gastown')).toBe(true);
   });
 
   test('returns false for client-side products', () => {

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

@@ -57,6 +57,7 @@ const USER_RATE_LIMITED_FEATURES: ReadonlySet<FeatureValue> = new Set([
   'cloud-agent',
   'code-review',
   'app-builder',
+  'gastown',
 ]);
 
 export function isUserRateLimitedFeature(feature: FeatureValue | null): boolean {