Update scheduling algorithm

frontend/src/components/FailedBanner.jsx

@@ -5,7 +5,17 @@ export default function FailedBanner({ rerunTests, onDecision }) {
   const hours = Math.floor(totalMinutes / 60)
   const mins = totalMinutes % 60
   const timeStr = hours > 0 ? `${hours}h ${mins}m` : `${mins}m`
-  const testIds = rerunTests.map(t => t.test_id).join(', ')
+
+  // Group test IDs by device
+  const byDevice = rerunTests.reduce((acc, t) => {
+    const device = t.device ?? 'Unknown'
+    if (!acc[device]) acc[device] = []
+    acc[device].push(t.test_id)
+    return acc
+  }, {})
+  const deviceSummaries = Object.entries(byDevice)
+    .sort(([a], [b]) => a.localeCompare(b))
+    .map(([device, ids]) => `${device}: ${ids.join(', ')}`)
 
   return (
     <div className="flex items-start gap-4 px-6 py-3 bg-red-900/70 border-b border-red-700 text-red-100">
@@ -26,9 +36,13 @@ export default function FailedBanner({ rerunTests, onDecision }) {
       <div className="flex-1 min-w-0">
         <p className="text-sm font-medium">
           <span className="font-semibold">{rerunTests.length} test{rerunTests.length !== 1 ? 's' : ''}</span>
-          {' '}require a rerun — not completed in last overnight window:{' '}
-          <span className="font-mono text-red-200">{testIds}</span>
+          {' '}require a rerun — not completed in last overnight window:
         </p>
+        {deviceSummaries.map((summary) => (
+          <p key={summary} className="text-sm font-mono text-red-200 mt-0.5 truncate">
+            {summary}
+          </p>
+        ))}
         <p className="text-sm text-red-300 mt-0.5">
           Estimated rerun time: <span className="font-semibold text-red-100">{timeStr}</span>
           {' '}— Schedule rerun during daytime today?