feat(bf-3t8): worker card shows beadsCompleted + currentBead, removes eventCount

Phase 9 UI change 2. Updated WorkerGrid component to display bead progress
instead of raw event count. Shows current bead when WORKING state.

- Added beadsCompleted and currentBead fields to frontend WorkerInfo type
- Worker card now shows "bead: bf-5r22 / 31 completed" when WORKING
- Shows "31 completed" when not WORKING or no current bead
- Removed eventCount display from worker card UI
- Updated tests to cover new display format

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/web/frontend/src/components/WorkerGrid.tsx

@@ -153,7 +153,11 @@ const WorkerGrid: React.FC<WorkerGridProps> = ({
                 </div>
               </div>
               <div className="worker-stats">
-                <span>{worker.eventCount} events</span>
+                <span>
+                  {worker.needleState === 'WORKING' && worker.currentBead
+                    ? `bead: ${worker.currentBead} / ${worker.beadsCompleted} completed`
+                    : `${worker.beadsCompleted} completed`}
+                </span>
                 <span>{formatLastSeen(worker.lastSeen)}</span>
               </div>
               {worker.hasCollision && worker.activeFiles && worker.activeFiles.length > 0 && (

src/web/frontend/src/types.ts

@@ -49,6 +49,8 @@ export interface WorkerInfo {
   id: string;
   lastSeen: string;
   eventCount: number;
+  beadsCompleted: number;
+  currentBead: string | null;
   status: 'active' | 'idle' | 'error';
   needleState?: NeedleState;
   currentTool?: string;

src/web/frontend/test/WorkerGrid.test.tsx

@@ -13,6 +13,8 @@ describe('WorkerGrid', () => {
     id: 'worker-alpha',
     lastSeen: new Date().toISOString(),
     eventCount: 10,
+    beadsCompleted: 5,
+    currentBead: null,
     status: 'active',
     recentEvents: [],
     ...overrides,
@@ -133,10 +135,10 @@ describe('WorkerGrid', () => {
     });
   });
 
-  describe('event count display', () => {
-    it('should display event count', () => {
+  describe('beads completed display', () => {
+    it('should display beads completed count', () => {
       const workers = [
-        createMockWorker({ id: 'worker-1', eventCount: 42 }),
+        createMockWorker({ id: 'worker-1', beadsCompleted: 31 }),
       ];
 
       render(
@@ -147,12 +149,12 @@ describe('WorkerGrid', () => {
         />
       );
 
-      expect(screen.getByText(/42 events/)).toBeInTheDocument();
+      expect(screen.getByText(/31 completed/)).toBeInTheDocument();
     });
 
-    it('should display zero events', () => {
+    it('should display zero beads completed', () => {
       const workers = [
-        createMockWorker({ id: 'worker-1', eventCount: 0 }),
+        createMockWorker({ id: 'worker-1', beadsCompleted: 0 }),
       ];
 
       render(
@@ -163,7 +165,72 @@ describe('WorkerGrid', () => {
         />
       );
 
-      expect(screen.getByText(/0 events/)).toBeInTheDocument();
+      expect(screen.getByText(/0 completed/)).toBeInTheDocument();
+    });
+
+    it('should display current bead when WORKING', () => {
+      const workers = [
+        createMockWorker({
+          id: 'worker-1',
+          beadsCompleted: 31,
+          currentBead: 'bf-5r22',
+          needleState: 'WORKING',
+        }),
+      ];
+
+      render(
+        <WorkerGrid
+          workers={workers}
+          selectedWorker={null}
+          onSelectWorker={mockOnSelectWorker}
+        />
+      );
+
+      expect(screen.getByText(/bead: bf-5r22 \/ 31 completed/)).toBeInTheDocument();
+    });
+
+    it('should not display current bead when not WORKING', () => {
+      const workers = [
+        createMockWorker({
+          id: 'worker-1',
+          beadsCompleted: 31,
+          currentBead: 'bf-5r22',
+          needleState: 'STOPPED',
+        }),
+      ];
+
+      render(
+        <WorkerGrid
+          workers={workers}
+          selectedWorker={null}
+          onSelectWorker={mockOnSelectWorker}
+        />
+      );
+
+      expect(screen.getByText(/31 completed/)).toBeInTheDocument();
+      expect(screen.queryByText(/bead: bf-5r22/)).not.toBeInTheDocument();
+    });
+
+    it('should not display bead prefix when WORKING but no currentBead', () => {
+      const workers = [
+        createMockWorker({
+          id: 'worker-1',
+          beadsCompleted: 15,
+          currentBead: null,
+          needleState: 'WORKING',
+        }),
+      ];
+
+      render(
+        <WorkerGrid
+          workers={workers}
+          selectedWorker={null}
+          onSelectWorker={mockOnSelectWorker}
+        />
+      );
+
+      expect(screen.getByText(/15 completed/)).toBeInTheDocument();
+      expect(screen.queryByText(/bead:/)).not.toBeInTheDocument();
     });
   });