align stat card numbers by fixing label min-height

Labels with different line counts (1 vs 2 lines) caused numbers to
sit at different vertical positions. Fixed by setting min-height: 32px
on .stat-label so all cards have consistent content height.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: x-zheng16

index.html

@@ -636,6 +636,7 @@
       text-transform: uppercase;
       letter-spacing: 1.5px;
       margin-top: 4px;
+      min-height: 32px;
       font-family: 'JetBrains Mono', monospace;
     }