Merge pull request 'CUB-55: Add SendStatusUpdate method to AgentStatusHub' (#25) from agent/dex/CUB-55-signalr-broadcast into dev

Reviewed-on: #25

backend/ControlCenter/Hubs/AgentStatusHub.cs

@@ -37,6 +37,33 @@ public class AgentStatusHub : Hub<IAgentStatusClient>
         _logger = logger;
     }
 
+    /// <summary>
+    /// Broadcasts an agent status update to all connected clients.
+    ///
+    /// <para>
+    /// Any connected client (or server-side caller) can invoke this method
+    /// to push a status update to every subscriber. The DTO is converted to
+    /// an <see cref="AgentStatusUpdate"/> record and relayed through the
+    /// <see cref="IAgentStatusClient.AgentStatusChanged"/> callback.
+    /// </para>
+    /// </summary>
+    /// <param name="update">The agent status update DTO to broadcast.</param>
+    public async Task SendStatusUpdate(AgentStatusUpdateDto update)
+    {
+        _logger.LogInformation(
+            "Broadcasting status update for agent {AgentId}: {Status}",
+            update.AgentId, update.Status);
+
+        var agentUpdate = update.ToUpdate();
+
+        // Broadcast to all connected clients
+        await Clients.All.AgentStatusChanged(agentUpdate);
+
+        // Also push to the specific agent's group
+        var agentGroup = AgentGroupName(update.AgentId);
+        await Clients.Group(agentGroup).AgentStatusChanged(agentUpdate);
+    }
+
     /// <summary>
     /// Adds the calling connection to the fleet group.
     /// Once joined, the client will receive all agent status changes

backend/ControlCenter/Hubs/Models/AgentStatusModels.cs

@@ -72,6 +72,80 @@ public record TaskProgressUpdate(
     string? Elapsed
 );
 
+/// <summary>
+/// Data transfer object for broadcasting agent status updates
+/// to all connected SignalR clients via the hub's SendStatusUpdate method.
+///
+/// <para>This DTO provides a mutable, serialization-friendly alternative to
+/// <see cref="AgentStatusUpdate"/> for callers that construct updates
+/// from external data sources (e.g., HTTP API payloads).</para>
+/// </summary>
+public class AgentStatusUpdateDto
+{
+    /// <summary>
+    /// Agent identifier, e.g. "otto", "dex", "rex".
+    /// </summary>
+    public string AgentId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Human-readable display name, e.g. "Otto", "Dex".
+    /// </summary>
+    public string DisplayName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Role description, e.g. "Orchestrator Agent", "Backend Specialist".
+    /// </summary>
+    public string Role { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Current operational status of the agent as lowercase string:
+    /// "active", "idle", "thinking", "error".
+    /// </summary>
+    public string Status { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Description of the agent's current task, if any.
+    /// </summary>
+    public string? CurrentTask { get; set; }
+
+    /// <summary>
+    /// Full session key, e.g. "agent:otto:telegram:direct:8787451565".
+    /// </summary>
+    public string SessionKey { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Communication channel, e.g. "telegram", "discord", "slack".
+    /// </summary>
+    public string Channel { get; set; } = string.Empty;
+
+    /// <summary>
+    /// ISO 8601 timestamp of the agent's last activity.
+    /// </summary>
+    public string LastActivity { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Error message when the agent status is "error".
+    /// </summary>
+    public string? ErrorMessage { get; set; }
+
+    /// <summary>
+    /// Converts this DTO to an immutable <see cref="AgentStatusUpdate"/> record
+    /// for use with the typed SignalR client interface.
+    /// </summary>
+    /// <returns>An <see cref="AgentStatusUpdate"/> with equivalent field values.</returns>
+    public AgentStatusUpdate ToUpdate() => new(
+        AgentId,
+        DisplayName,
+        Role,
+        Status,
+        CurrentTask,
+        SessionKey,
+        Channel,
+        LastActivity,
+        ErrorMessage
+    );
+}
+
 /// <summary>
 /// Snapshot of an agent's full card data, sent on initial connection
 /// or when the fleet state is requested.

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

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