feat(workers): Add platform badge (D/J/T) to active tasks display

- Add PlatformBadge component showing D=Dutchie, J=Jane, T=Treez
- Include platform field in worker-registry API response
- Fix null running_seconds displaying as "nulls"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/routes/worker-registry.ts

@@ -436,6 +436,7 @@ router.get('/workers', async (req: Request, res: Response) => {
         t.worker_id,
         t.id as task_id,
         t.role,
+        t.platform,
         t.status as task_status,
         t.started_at,
         EXTRACT(EPOCH FROM (NOW() - t.started_at))::int as running_seconds,
@@ -458,6 +459,7 @@ router.get('/workers', async (req: Request, res: Response) => {
       tasksByWorker[task.worker_id].push({
         task_id: task.task_id,
         role: task.role,
+        platform: task.platform,
         status: task.task_status,
         started_at: task.started_at,
         running_seconds: task.running_seconds,

cannaiq/src/pages/WorkersDashboard.tsx

@@ -128,6 +128,7 @@ interface ActiveTask {
   status: string;
   started_at: string;
   running_seconds: number;
+  platform?: string;
   dispensary?: {
     id: number;
     name: string;
@@ -136,6 +137,25 @@ interface ActiveTask {
   } | null;
 }
 
+// Platform badge component
+function PlatformBadge({ platform }: { platform?: string }) {
+  const config: Record<string, { letter: string; bg: string; text: string; title: string }> = {
+    dutchie: { letter: 'D', bg: 'bg-green-100', text: 'text-green-700', title: 'Dutchie' },
+    jane: { letter: 'J', bg: 'bg-purple-100', text: 'text-purple-700', title: 'Jane' },
+    treez: { letter: 'T', bg: 'bg-orange-100', text: 'text-orange-700', title: 'Treez' },
+  };
+  const p = platform?.toLowerCase() || 'dutchie';
+  const c = config[p] || { letter: '?', bg: 'bg-gray-100', text: 'text-gray-600', title: platform || 'Unknown' };
+  return (
+    <span
+      className={`inline-flex items-center justify-center w-4 h-4 rounded text-[10px] font-bold ${c.bg} ${c.text}`}
+      title={c.title}
+    >
+      {c.letter}
+    </span>
+  );
+}
+
 // Current task info
 interface Task {
   id: number;
@@ -632,9 +652,9 @@ function TaskCountBadge({ worker, tasks }: { worker: Worker; tasks: Task[] }) {
             <div
               key={task.task_id}
               className="flex items-center gap-1.5 text-xs bg-blue-50 rounded px-1.5 py-0.5"
-              title={`Task #${task.task_id}: ${task.role}\n${task.dispensary?.name || 'Unknown'}\nRunning: ${formatSecondsToTime(task.running_seconds)}`}
+              title={`Task #${task.task_id}: ${task.role}\nPlatform: ${task.platform || 'dutchie'}\n${task.dispensary?.name || 'Unknown'}\nRunning: ${formatSecondsToTime(task.running_seconds)}`}
             >
-              <div className="w-1.5 h-1.5 rounded-full bg-blue-500 animate-pulse" />
+              <PlatformBadge platform={task.platform} />
               <span className="text-gray-600 truncate max-w-[140px]">
                 {task.dispensary?.name?.split(' ').slice(0, 2).join(' ') || task.role.replace(/_/g, ' ')}
               </span>