CUB-41: Add low stock indicators to filament UI

frontend/src/app/app.ts

@@ -0,0 +1,28 @@
+import { Component, ViewChild } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+import { DashboardSummaryComponent } from './components/dashboard-summary/dashboard-summary.component';
+import { AgentSummary, SystemHealth } from './models/agent.model';
+
+@Component({
+  selector: 'app-root',
+  imports: [RouterOutlet, DashboardSummaryComponent],
+  templateUrl: './app.html',
+  styleUrl: './app.scss'
+})
+export class App {
+  @ViewChild(DashboardSummaryComponent) summaryComponent!: DashboardSummaryComponent;
+
+  /** Sample data for development — will be replaced by real service data */
+  readonly sampleSummary: AgentSummary = {
+    total: 7,
+    active: 4,
+    idle: 1,
+    thinking: 1,
+    error: 1,
+  };
+
+  readonly sampleHealth: SystemHealth = {
+    connected: true,
+    status: 'healthy',
+  };
+}