feat: native TRACE log level with design system 0.1.16

Map TRACE to its own 'trace' level instead of grouping with DEBUG,
now that the design system LogViewer supports it natively.
Bump @cameleer/design-system to 0.1.16.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/package.json

@@ -14,7 +14,7 @@
     "generate-api:live": "curl -s http://localhost:8081/api/v1/api-docs -o src/api/openapi.json && openapi-typescript src/api/openapi.json -o src/api/schema.d.ts"
   },
   "dependencies": {
-    "@cameleer/design-system": "^0.1.15",
+    "@cameleer/design-system": "^0.1.16",
     "@tanstack/react-query": "^5.90.21",
     "openapi-fetch": "^0.17.0",
     "react": "^19.2.4",