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/src/components/TapConfigModal.module.css

@@ -26,7 +26,7 @@
 .typeOption {
   padding: 4px 12px;
   border-radius: var(--radius-sm);
-  font-size: 11px;
+  font-size: 12px;
   cursor: pointer;
   border: 1px solid var(--border-subtle);
   background: transparent;
@@ -72,7 +72,7 @@
 .testTabBtn {
   padding: 4px 12px;
   border-radius: 6px;
-  font-size: 11px;
+  font-size: 12px;
   cursor: pointer;
   border: 1px solid transparent;
   background: transparent;