CUB-20: Develop agent card component with dynamic status/progress

frontend/src/app/command-hub/components/agent-card/agent-card.component.html

@@ -2,11 +2,13 @@
 <!-- AgentCard — per spec Section 7.3                                            -->
 <!-- Integrates: Status Badge · Task Progress Bar · Quick‑Jump Button           -->
 <!-- Left‑border accent matches status color. role="article" + aria‑labels.     -->
+<!-- Enhanced: data-status attribute, elapsed time, design tokens.              -->
 <!-- ========================================================================== -->
 <article
   class="agent-card"
   role="article"
-  [attr.aria-label]="displayName + ' — ' + statusLabel()"
+  [attr.data-status]="status"
+  [attr.aria-label]="(displayName || agentId) + ' — ' + statusLabel()"
   [style.border-left-color]="statusBorderColor()"
 >
 
@@ -27,19 +29,20 @@
   </div>
 
   <!-- ── Body: current task ── -->
-  <div class="agent-card__body" *ngIf="task || status === 'error'">
+  <div class="agent-card__body" *ngIf="task || isError()">
     <p
       class="agent-card__task"
-      [attr.aria-label]="'Current task: ' + (status === 'error' ? errorMessage : task)"
+      [class.agent-card__task--error]="isError()"
+      [attr.aria-label]="'Current task: ' + (isError() ? errorMessage || task : task)"
     >
-      {{ status === 'error' ? errorMessage || task : task }}
+      {{ isError() ? errorMessage || task : task }}
     </p>
   </div>
 
   <!-- ── Task Progress Bar ── -->
   <div
     class="agent-card__progress"
-    *ngIf="progress > 0 && status !== 'error'"
+    *ngIf="showProgress()"
     [attr.aria-label]="'Task progress: ' + progress + '%'"
   >
     <mat-progress-bar
@@ -50,6 +53,16 @@
     <span class="agent-card__progress-label text-mono">{{ progress }}%</span>
   </div>
 
+  <!-- ── Elapsed Time ── -->
+  <div
+    class="agent-card__elapsed"
+    *ngIf="taskElapsed && isActiveLike()"
+    [attr.aria-label]="'Elapsed: ' + taskElapsed"
+  >
+    <mat-icon aria-hidden="true" class="agent-card__elapsed-icon">schedule</mat-icon>
+    <span class="text-mono">{{ taskElapsed }}</span>
+  </div>
+
   <!-- ── Footer: channel + last activity + quick‑jump ── -->
   <div class="agent-card__footer">
     <div class="agent-card__meta">