fix(frontend): show fault/comm locked state in runtime badge

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

web/js/units.js

@@ -76,6 +76,8 @@ async function selectUnit(unitId) {
 
 function runtimeBadge(runtime) {
   if (!runtime) return '<span class="badge offline">OFFLINE</span>';
+  if (runtime.comm_locked) return '<span class="badge offline">COMM ERR</span>';
+  if (runtime.fault_locked) return '<span class="badge danger">FAULT</span>';
   const stateLabels = {
     stopped: 'STOPPED',
     running: 'RUNNING',