feat(tests): add comprehensive tests for TokenRouter and related components

- Implement tests for TokenRouter downstream policy, covering allowedRouteIds and site weight multipliers.
- Add tests for TokenRouter patterns and model mapping, including regex pattern matching and model mapping precedence.
- Create tests for BrandIcon component to verify brand detection logic.
- Develop tests for Accounts page, focusing on rebind panel behavior and refresh action on error.
- Introduce fuzzy search utility tests to validate substring and subsequence matching.
- Implement navigation focus helpers tests for building and parsing focus paths.
- Add progressive render tests to ensure correct initial and next visible counts.
- Create route model candidates index tests to validate route candidate indexing and matching logic.

src/web/pages/Models.tsx

@@ -68,14 +68,17 @@ interface ModelsMarketplaceResponse {
   };
 }
 function getMetricColor(latency: number) {
-  if (latency > 3000) return 'var(--color-danger)';
-  if (latency > 1200) return 'var(--color-warning)';
+  if (latency >= 3000) return 'var(--color-danger)';
+  if (latency >= 2000) return 'color-mix(in srgb, var(--color-warning) 30%, var(--color-danger))';
+  if (latency >= 1500) return 'color-mix(in srgb, var(--color-warning) 60%, var(--color-danger))';
+  if (latency >= 1000) return 'var(--color-warning)';
+  if (latency > 500) return 'color-mix(in srgb, var(--color-success) 60%, var(--color-warning))';
   return 'var(--color-success)';
 }
 
 function getLatencyBadgeClass(latency: number) {
-  if (latency > 3000) return 'badge-error';
-  if (latency > 1200) return 'badge-warning';
+  if (latency >= 3000) return 'badge-error';
+  if (latency >= 1000) return 'badge-warning';
   return 'badge-success';
 }