feat: add TRACE log level support across UI

Add TRACE option to log forwarding level dropdowns (AppConfig,
AgentHealth), badge color mapping, and log filter ButtonGroups
on all pages that display application logs.

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

ui/src/pages/Admin/AppConfigDetailPage.tsx

@@ -38,6 +38,7 @@ function logLevelColor(level?: string): BadgeColor {
     case 'ERROR': return 'error';
     case 'WARN': return 'warning';
     case 'DEBUG': return 'running';
+    case 'TRACE': return 'auto';
     default: return 'success';
   }
 }
@@ -334,6 +335,7 @@ export default function AppConfigDetailPage() {
                 <option value="WARN">WARN</option>
                 <option value="INFO">INFO</option>
                 <option value="DEBUG">DEBUG</option>
+                <option value="TRACE">TRACE</option>
               </select>
             ) : (
               <Badge label={String(form.logForwardingLevel)} color={logLevelColor(form.logForwardingLevel as string)} variant="filled" />