chore: update DS to v0.1.38, enforce 12px font size floor

Update @cameleer/design-system to v0.1.38 (12px minimum font size).
Replace all 10px and 11px font sizes with 12px across 25 CSS modules
and 5 TSX inline styles to match the new DS floor.

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

ui/package.json

@@ -15,7 +15,7 @@
     "postinstall": "node -e \"const fs=require('fs');fs.mkdirSync('public',{recursive:true});fs.copyFileSync('node_modules/@cameleer/design-system/assets/cameleer3-logo.svg','public/favicon.svg')\""
   },
   "dependencies": {
-    "@cameleer/design-system": "^0.1.37",
+    "@cameleer/design-system": "^0.1.38",
     "@tanstack/react-query": "^5.90.21",
     "lucide-react": "^1.7.0",
     "openapi-fetch": "^0.17.0",