fix: config bar layout — override section's flex-direction to row

The .section base class sets flex-direction: column, which caused the
config bar items (App Log Level, Agent Log Level, etc.) to stack
vertically instead of displaying in a horizontal row.

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

ui/src/pages/AgentHealth/AgentHealth.module.css

@@ -34,6 +34,8 @@
 /* Application config bar — card styling via sectionStyles.section */
 .configBar {
   display: flex;
+  flex-direction: row;
+  flex-wrap: wrap;
   align-items: flex-end;
   gap: 20px;
   padding: 12px 16px;