CUB-48: Agent Status Badge component with pulse animations

frontend/src/app/components/agent-status-badge/agent-status-badge.component.html

@@ -0,0 +1,8 @@
+<span class="badge"
+      [class]="statusClass"
+      [class.badge--pulse]="hasPulse"
+      [attr.aria-label]="'Agent status: ' + displayLabel"
+      role="status">
+  <span class="badge__dot"></span>
+  <span class="badge__label">{{ displayLabel }}</span>
+</span>

frontend/src/app/components/agent-status-badge/agent-status-badge.component.scss

@@ -0,0 +1,146 @@
+// ============================================================================
+// Agent Status Badge — per spec Section 7.3
+// Colored pill with dot indicator and optional pulse animation.
+// ============================================================================
+
+$badge-height: 24px;
+$dot-size: 8px;
+$border-radius: 12px;
+$font-size: 12px;
+$font-weight: 500;
+$padding-x: 8px;
+$gap: 6px;
+
+@use 'sass:color';
+
+// Status color palette
+$color-active: #22c55e;   // green-500
+$color-idle: #9ca3af;     // gray-400
+$color-thinking: #3b82f6; // blue-500
+$color-error: #ef4444;    // red-500
+$color-offline: #9ca3af;  // gray-400
+
+// Background tints (12% opacity for soft pill background)
+$bg-active: rgba($color-active, 0.12);
+$bg-idle: rgba($color-idle, 0.12);
+$bg-thinking: rgba($color-thinking, 0.12);
+$bg-error: rgba($color-error, 0.12);
+$bg-offline: rgba($color-offline, 0.12);
+
+// ---------------------------------------------------------------------------
+// Base pill
+// ---------------------------------------------------------------------------
+.badge {
+  display: inline-flex;
+  align-items: center;
+  height: $badge-height;
+  padding: 0 $padding-x;
+  border-radius: $border-radius;
+  gap: $gap;
+  font-size: $font-size;
+  font-weight: $font-weight;
+  line-height: 1;
+  white-space: nowrap;
+  user-select: none;
+}
+
+// ---------------------------------------------------------------------------
+// Dot indicator
+// ---------------------------------------------------------------------------
+.badge__dot {
+  width: $dot-size;
+  height: $dot-size;
+  border-radius: 50%;
+  flex-shrink: 0;
+}
+
+// ---------------------------------------------------------------------------
+// Label text
+// ---------------------------------------------------------------------------
+.badge__label {
+  line-height: 1;
+}
+
+// ---------------------------------------------------------------------------
+// Status color variants
+// ---------------------------------------------------------------------------
+.badge--active {
+  background: $bg-active;
+  color: color.adjust($color-active, $lightness: -10%);
+
+  .badge__dot {
+    background: $color-active;
+  }
+}
+
+.badge--idle {
+  background: $bg-idle;
+  color: color.adjust($color-idle, $lightness: -15%);
+
+  .badge__dot {
+    background: $color-idle;
+  }
+}
+
+.badge--thinking {
+  background: $bg-thinking;
+  color: color.adjust($color-thinking, $lightness: -10%);
+
+  .badge__dot {
+    background: $color-thinking;
+  }
+}
+
+.badge--error {
+  background: $bg-error;
+  color: color.adjust($color-error, $lightness: -10%);
+
+  .badge__dot {
+    background: $color-error;
+  }
+}
+
+.badge--offline {
+  background: $bg-offline;
+  color: color.adjust($color-offline, $lightness: -15%);
+
+  .badge__dot {
+    background: $color-offline;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Pulse animation — applied when status is active, thinking, or error
+// ---------------------------------------------------------------------------
+.badge--pulse {
+  .badge__dot {
+    animation: pulse-dot 2s ease-in-out infinite;
+  }
+}
+
+// Active: 2s pulse
+.badge--active.badge--pulse .badge__dot {
+  animation-duration: 2s;
+}
+
+// Thinking: 3s pulse
+.badge--thinking.badge--pulse .badge__dot {
+  animation-duration: 3s;
+}
+
+// Error: 0.8s pulse (fast, urgent)
+.badge--error.badge--pulse .badge__dot {
+  animation-duration: 0.8s;
+}
+
+@keyframes pulse-dot {
+  0%,
+  100% {
+    opacity: 1;
+    transform: scale(1);
+  }
+  50% {
+    opacity: 0.4;
+    transform: scale(1.5);
+  }
+}

frontend/src/app/components/agent-status-badge/agent-status-badge.component.ts

@@ -0,0 +1,54 @@
+import { ChangeDetectionStrategy, Component, input } from '@angular/core';
+import { AgentStatus } from '../../models/agent.model';
+
+/**
+ * Agent Status Badge component.
+ * Displays a colored pill with a pulse animation indicating the agent's current status.
+ * Per spec Section 7.3: Agent Card Component Interface — status indicator.
+ *
+ * Color mapping:
+ * - Active → green
+ * - Idle → gray
+ * - Thinking → blue
+ * - Error → red
+ * - Offline → gray (no pulse)
+ *
+ * Pulse animations:
+ * - Active → 2s
+ * - Error → 0.8s
+ * - Thinking → 3s
+ * - Idle / Offline → no pulse
+ */
+@Component({
+  selector: 'app-agent-status-badge',
+  standalone: true,
+  imports: [],
+  templateUrl: './agent-status-badge.component.html',
+  styleUrl: './agent-status-badge.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AgentStatusBadgeComponent {
+  /** Current agent status — binds to the AgentStatus type from the model. */
+  readonly status = input.required<AgentStatus>();
+
+  /** Label text shown inside the badge. Defaults to title-cased status. */
+  readonly label = input<string>();
+
+  get displayLabel(): string {
+    return this.label() ?? this.titleCase(this.status());
+  }
+
+  /** CSS class driven by the current status value. */
+  get statusClass(): string {
+    return `badge--${this.status()}`;
+  }
+
+  /** Whether the pulse animation should be active for the current status. */
+  get hasPulse(): boolean {
+    return this.status() === 'active' || this.status() === 'thinking' || this.status() === 'error';
+  }
+
+  private titleCase(value: string): string {
+    return value.charAt(0).toUpperCase() + value.slice(1);
+  }
+}

frontend/src/app/components/agent-status-badge/index.ts

@@ -0,0 +1 @@
+export { AgentStatusBadgeComponent } from './agent-status-badge.component';

frontend/src/app/components/index.ts

@@ -1 +1 @@
-export * from './quick-jump-button/quick-jump-button.component';
+export { AgentStatusBadgeComponent } from './agent-status-badge/agent-status-badge.component';

frontend/src/app/components/quick-jump-button/quick-jump-button.component.html

@@ -1,8 +0,0 @@
-<button
-  mat-icon-button
-  class="quick-jump-button"
-  [attr.aria-label]="'Jump to agent session'"
-  (click)="onJumpClick()"
->
-  <mat-icon>arrow_forward</mat-icon>
-</button>

frontend/src/app/components/quick-jump-button/quick-jump-button.component.scss

@@ -1,68 +0,0 @@
-// ============================================================================
-// Quick-Jump Button — M3 FilledTonalIconButton
-// Per spec Section 7.3: Agent Card Quick-Jump action
-// M3 spec: FilledTonalIconButton uses secondary container color
-// with 8% state layer overlay for hover/focus.
-// ============================================================================
-
-.quick-jump-button {
-  // M3 FilledTonalIconButton: secondary-container background
-  // Angular Material mat-icon-button sets up the base shape (40x40, round).
-  // We override the color tokens to match FilledTonal style.
-  --mdc-icon-button-icon-color: var(--mat-sys-on-secondary-container);
-  background-color: var(--mat-sys-secondary-container);
-  border-radius: 50%;
-  transition: background-color 150ms cubic-bezier(0.4, 0, 0.2, 1);
-
-  // M3 State Layer: 8% overlay on hover
-  &:hover {
-    background-color: var(--mat-sys-secondary-container);
-    // State layer overlay using a pseudo-element for precise 8% opacity
-    &::after {
-      content: '';
-      position: absolute;
-      inset: 0;
-      border-radius: 50%;
-      background-color: var(--mat-sys-on-secondary-container);
-      opacity: 0.08;
-      pointer-events: none;
-    }
-  }
-
-  // M3 State Layer: 12% overlay on focus-visible (slightly stronger for accessibility)
-  &:focus-visible {
-    background-color: var(--mat-sys-secondary-container);
-    outline: 3px solid var(--status-active);
-    outline-offset: 2px;
-
-    &::after {
-      content: '';
-      position: absolute;
-      inset: 0;
-      border-radius: 50%;
-      background-color: var(--mat-sys-on-secondary-container);
-      opacity: 0.12;
-      pointer-events: none;
-    }
-  }
-
-  // M3 State Layer: 12% overlay on active/pressed
-  &:active {
-    background-color: var(--mat-sys-secondary-container);
-
-    &::after {
-      content: '';
-      position: absolute;
-      inset: 0;
-      border-radius: 50%;
-      background-color: var(--mat-sys-on-secondary-container);
-      opacity: 0.12;
-      pointer-events: none;
-    }
-  }
-
-  // Icon color stays on-secondary-container across all states
-  .mat-icon {
-    color: var(--mat-sys-on-secondary-container);
-  }
-}

frontend/src/app/components/quick-jump-button/quick-jump-button.component.ts

@@ -1,32 +0,0 @@
-import { ChangeDetectionStrategy, Component, EventEmitter, Output } from '@angular/core';
-import { MatIconButton } from '@angular/material/button';
-import { MatIcon } from '@angular/material/icon';
-
-/**
- * Quick-Jump Button — M3 FilledTonalIconButton
- *
- * An icon button that emits a navigation event for jumping to an agent session.
- * Uses the Material Design 3 FilledTonalIconButton style with 8% state layer
- * overlay on hover and focus.
- *
- * Per spec Section 7.3: Agent Card Component Interface
- */
-@Component({
-  selector: 'app-quick-jump-button',
-  standalone: true,
-  imports: [MatIconButton, MatIcon],
-  templateUrl: './quick-jump-button.component.html',
-  styleUrl: './quick-jump-button.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush,
-})
-export class QuickJumpButtonComponent {
-  /** Emitted when the button is clicked, carrying the session key for navigation. */
-  @Output() jumpClick = new EventEmitter<string>();
-
-  /** The session key to navigate to. Set by the parent agent card. */
-  sessionKey = '';
-
-  onJumpClick(): void {
-    this.jumpClick.emit(this.sessionKey);
-  }
-}