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

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

@@ -2,15 +2,18 @@
 // AgentCard — M3 tactical dark styling
 // Per spec Section 7.3: left‑border accent, status‑aware coloring,
 // responsive card layout with 320px min‑width.
+// Enhanced: data-status selectors, elapsed time, design token imports.
 // ============================================================================
 
+@use 'tokens' as tokens;
+
 .agent-card {
   display: flex;
   flex-direction: column;
-  min-width: var(--cc-card-min-width);
-  padding: var(--cc-card-padding);
+  min-width: tokens.$cc-card-min-width;
+  padding: tokens.$cc-card-padding;
   background-color: var(--cc-surface-container);
-  border-radius: var(--cc-card-border-radius);
+  border-radius: tokens.$cc-card-border-radius;
   border-left: 4px solid var(--status-offline); // default; overridden by [style]
   border-top: 1px solid var(--cc-outline);
   border-right: 1px solid var(--cc-outline);
@@ -48,11 +51,6 @@
   letter-spacing: 0.02em;
   text-transform: uppercase;
   color: var(--cc-on-surface);
-
-  // Per‑status background tints
-  .status-dot--active + & {
-    background-color: var(--status-active-bg);
-  }
 }
 
 .agent-card__status-label {
@@ -94,8 +92,7 @@
   color: var(--cc-on-surface);
   line-height: 1.4;
 
-  // Error messages get distinct styling
-  .agent-card--error & {
+  &--error {
     color: var(--status-error);
   }
 }
@@ -109,6 +106,7 @@
 }
 
 .agent-card__progress-label {
+  font-family: var(--cc-font-mono);
   font-size: 12px;
   font-weight: 500;
   color: var(--cc-on-surface-variant);
@@ -130,6 +128,23 @@
   }
 }
 
+// ── Elapsed Time ──
+.agent-card__elapsed {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  font-size: 12px;
+  color: var(--cc-on-surface-variant);
+  padding: 2px 0;
+}
+
+.agent-card__elapsed-icon {
+  font-size: 14px;
+  width: 14px;
+  height: 14px;
+  color: var(--status-thinking);
+}
+
 // ── Footer ──
 .agent-card__footer {
   display: flex;
@@ -153,7 +168,6 @@
   color: var(--cc-on-surface-variant);
 }
 
-.agent-card__channel-icon,
 .agent-card__channel .mat-icon {
   font-size: 14px;
   width: 14px;
@@ -169,7 +183,6 @@
 .agent-card__jump {
   flex-shrink: 0;
 
-  // Match M3 text button sizing
   .mat-mdc-button {
     min-width: 36px;
     padding: 0 8px;
@@ -184,11 +197,9 @@
 }
 
 // ── Status‑specific background tints for badge ──
-// We use the global status-dot classes from styles.scss and pair them
-// with contextual background-color overrides here.
+// Using data-status attribute selectors for clean styling.
 
-.agent-card[data-status="active"] .agent-card__badge,
-.agent-card .status-dot--active ~ .agent-card__badge {
+.agent-card[data-status="active"] .agent-card__badge {
   background-color: var(--status-active-bg);
 }
 
@@ -204,8 +215,22 @@
   background-color: var(--status-error-bg);
 }
 
+.agent-card[data-status="offline"] .agent-card__badge {
+  background-color: var(--cc-surface-container-high);
+}
+
+// ── Active‑like pulse on card border ──
+.agent-card[data-status="active"],
+.agent-card[data-status="thinking"] {
+  border-left-width: 4px;
+}
+
+.agent-card[data-status="error"] {
+  border-left-color: var(--status-error);
+}
+
 // ── Responsive ──
-@media (max-width: 599px) {
+@media (max-width: tokens.$cc-breakpoint-mobile) {
   .agent-card {
     min-width: unset;
     padding: 16px;