CUB-57: [Control Center] Dashboard Summary Component

2026-04-26 09:15:38 +00:00
parent 230c3b295d
commit d116f3178b
29 changed files with 9867 additions and 0 deletions
--- a/frontend/.editorconfig
+++ b/frontend/.editorconfig
@@ -0,0 +1,17 @@
+# Editor configuration, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.ts]
+quote_type = single
+ij_typescript_use_double_quotes = false
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false
--- a/frontend/.gitignore
+++ b/frontend/.gitignore
@@ -0,0 +1,44 @@
+# See https://docs.github.com/get-started/getting-started-with-git/ignoring-files for more about ignoring files.
+
+# Compiled output
+/dist
+/tmp
+/out-tsc
+/bazel-out
+
+# Node
+/node_modules
+npm-debug.log
+yarn-error.log
+
+# IDEs and editors
+.idea/
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# Visual Studio Code
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/mcp.json
+.history/*
+
+# Miscellaneous
+/.angular/cache
+.sass-cache/
+/connect.lock
+/coverage
+/libpeerconnection.log
+testem.log
+/typings
+__screenshots__/
+
+# System files
+.DS_Store
+Thumbs.db
--- a/frontend/.prettierrc
+++ b/frontend/.prettierrc
@@ -0,0 +1,12 @@
+{
+  "printWidth": 100,
+  "singleQuote": true,
+  "overrides": [
+    {
+      "files": "*.html",
+      "options": {
+        "parser": "angular"
+      }
+    }
+  ]
+}
--- a/frontend/.vscode/extensions.json
+++ b/frontend/.vscode/extensions.json
@@ -0,0 +1,4 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=827846
+  "recommendations": ["angular.ng-template"]
+}
--- a/frontend/.vscode/launch.json
+++ b/frontend/.vscode/launch.json
@@ -0,0 +1,20 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "ng serve",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: start",
+      "url": "http://localhost:4200/"
+    },
+    {
+      "name": "ng test",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: test",
+      "url": "http://localhost:9876/debug.html"
+    }
+  ]
+}
--- a/frontend/.vscode/mcp.json
+++ b/frontend/.vscode/mcp.json
@@ -0,0 +1,9 @@
+{
+  // For more information, visit: https://angular.dev/ai/mcp
+  "servers": {
+    "angular-cli": {
+      "command": "npx",
+      "args": ["-y", "@angular/cli", "mcp"]
+    }
+  }
+}
--- a/frontend/.vscode/tasks.json
+++ b/frontend/.vscode/tasks.json
@@ -0,0 +1,42 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?LinkId=733558
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "type": "npm",
+      "script": "start",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "Changes detected"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation (complete|failed)"
+          }
+        }
+      }
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "Changes detected"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation (complete|failed)"
+          }
+        }
+      }
+    }
+  ]
+}
--- a/frontend/README.md
+++ b/frontend/README.md
@@ -0,0 +1,59 @@
+# Frontend
+
+This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 21.2.8.
+
+## Development server
+
+To start a local development server, run:
+
+```bash
+ng serve
+```
+
+Once the server is running, open your browser and navigate to `http://localhost:4200/`. The application will automatically reload whenever you modify any of the source files.
+
+## Code scaffolding
+
+Angular CLI includes powerful code scaffolding tools. To generate a new component, run:
+
+```bash
+ng generate component component-name
+```
+
+For a complete list of available schematics (such as `components`, `directives`, or `pipes`), run:
+
+```bash
+ng generate --help
+```
+
+## Building
+
+To build the project run:
+
+```bash
+ng build
+```
+
+This will compile your project and store the build artifacts in the `dist/` directory. By default, the production build optimizes your application for performance and speed.
+
+## Running unit tests
+
+To execute unit tests with the [Vitest](https://vitest.dev/) test runner, use the following command:
+
+```bash
+ng test
+```
+
+## Running end-to-end tests
+
+For end-to-end (e2e) testing, run:
+
+```bash
+ng e2e
+```
+
+Angular CLI does not come with an end-to-end testing framework by default. You can choose one that suits your needs.
+
+## Additional Resources
+
+For more information on using the Angular CLI, including detailed command references, visit the [Angular CLI Overview and Command Reference](https://angular.dev/tools/cli) page.
--- a/frontend/angular.json
+++ b/frontend/angular.json
@@ -0,0 +1,78 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "cli": {
+    "packageManager": "npm"
+  },
+  "newProjectRoot": "projects",
+  "projects": {
+    "frontend": {
+      "projectType": "application",
+      "schematics": {
+        "@schematics/angular:component": {
+          "style": "scss"
+        }
+      },
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular/build:application",
+          "options": {
+            "browser": "src/main.ts",
+            "tsConfig": "tsconfig.app.json",
+            "inlineStyleLanguage": "scss",
+            "assets": [
+              {
+                "glob": "**/*",
+                "input": "public"
+              }
+            ],
+            "styles": [
+              "src/styles.scss"
+            ]
+          },
+          "configurations": {
+            "production": {
+              "budgets": [
+                {
+                  "type": "initial",
+                  "maximumWarning": "500kB",
+                  "maximumError": "1MB"
+                },
+                {
+                  "type": "anyComponentStyle",
+                  "maximumWarning": "4kB",
+                  "maximumError": "8kB"
+                }
+              ],
+              "outputHashing": "all"
+            },
+            "development": {
+              "optimization": false,
+              "extractLicenses": false,
+              "sourceMap": true
+            }
+          },
+          "defaultConfiguration": "production"
+        },
+        "serve": {
+          "builder": "@angular/build:dev-server",
+          "configurations": {
+            "production": {
+              "buildTarget": "frontend:build:production"
+            },
+            "development": {
+              "buildTarget": "frontend:build:development"
+            }
+          },
+          "defaultConfiguration": "development"
+        },
+        "test": {
+          "builder": "@angular/build:unit-test"
+        }
+      }
+    }
+  }
+}
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "frontend",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
+  },
+  "private": true,
+  "packageManager": "npm@11.11.0",
+  "dependencies": {
+    "@angular/cdk": "^21.2.8",
+    "@angular/common": "^21.2.0",
+    "@angular/compiler": "^21.2.0",
+    "@angular/core": "^21.2.0",
+    "@angular/forms": "^21.2.0",
+    "@angular/material": "^21.2.8",
+    "@angular/platform-browser": "^21.2.0",
+    "@angular/router": "^21.2.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^21.2.8",
+    "@angular/cli": "^21.2.8",
+    "@angular/compiler-cli": "^21.2.0",
+    "@vitest/browser-playwright": "^4.1.5",
+    "jsdom": "^28.0.0",
+    "prettier": "^3.8.1",
+    "typescript": "~5.9.2",
+    "vitest": "^4.0.8"
+  }
+}
--- a/frontend/public/favicon.ico
+++ b/frontend/public/favicon.ico
--- a/frontend/src/app/app.config.ts
+++ b/frontend/src/app/app.config.ts
@@ -0,0 +1,11 @@
+import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+import { routes } from './app.routes';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideRouter(routes)
+  ]
+};
--- a/frontend/src/app/app.html
+++ b/frontend/src/app/app.html
@@ -0,0 +1,10 @@
+<!-- Extrudex — Homepage (Main Hub) -->
+<main class="main-content">
+  <h1 class="sr-only">Extrudex Dashboard</h1>
+
+  <!-- Status Summary Bar — fleet-wide health at a glance -->
+  <app-dashboard-summary></app-dashboard-summary>
+
+  <!-- Placeholder for future sections: Printer Fleet Grid, Filament Stock, Recent Activity -->
+  <router-outlet />
+</main>
--- a/frontend/src/app/app.routes.ts
+++ b/frontend/src/app/app.routes.ts
@@ -0,0 +1,3 @@
+import { Routes } from '@angular/router';
+
+export const routes: Routes = [];
--- a/frontend/src/app/app.scss
+++ b/frontend/src/app/app.scss
@@ -0,0 +1,27 @@
+:host {
+  display: block;
+  min-height: 100vh;
+  background: #1a1a2e;
+  color: #e0e0e0;
+  font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
+}
+
+.main-content {
+  padding: 16px;
+
+  @media (min-width: 800px) {
+    padding: 24px;
+  }
+}
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
--- a/frontend/src/app/app.spec.ts
+++ b/frontend/src/app/app.spec.ts
@@ -0,0 +1,23 @@
+import { TestBed } from '@angular/core/testing';
+import { App } from './app';
+
+describe('App', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [App],
+    }).compileComponents();
+  });
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(App);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it('should render title', async () => {
+    const fixture = TestBed.createComponent(App);
+    await fixture.whenStable();
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.querySelector('h1')?.textContent).toContain('Extrudex Dashboard');
+  });
+});
--- a/frontend/src/app/app.ts
+++ b/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',
+  };
+}
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.html
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.html
@@ -0,0 +1,63 @@
+<!-- Dashboard Summary Bar — Fleet-wide health at a glance -->
+<section class="dashboard-summary" role="status" aria-label="Dashboard summary">
+
+  <!-- System Health Indicator -->
+  <div class="summary-item health-indicator"
+       [class.healthy]="health().status === 'healthy'"
+       [class.degraded]="isDegraded()"
+       [class.down]="isDown()"
+       [matTooltip]="statusLabel()"
+       matTooltipPosition="below">
+    <span class="connection-dot" [class.connected]="health().connected"></span>
+    <span class="health-label">{{ statusLabel() }}</span>
+  </div>
+
+  <!-- Total Active Agents -->
+  <div class="summary-item" matTooltip="Total active agents" matTooltipPosition="below">
+    <mat-icon aria-hidden="true">smart_toy</mat-icon>
+    <span class="metric-value">{{ summary().active }} / {{ summary().total }}</span>
+    <span class="metric-label">Active</span>
+  </div>
+
+  <!-- Status Breakdown -->
+  <div class="summary-item status-breakdown">
+    <mat-chip-set aria-label="Agent status breakdown">
+      <mat-chip
+        class="status-chip chip-active"
+        [class.has-count]="summary().active > 0"
+        matTooltip="Active agents">
+        <mat-icon matChipStart>check_circle</mat-icon>
+        <span class="chip-count">{{ summary().active }}</span>
+        <span class="chip-label">Active</span>
+      </mat-chip>
+
+      <mat-chip
+        class="status-chip chip-idle"
+        [class.has-count]="summary().idle > 0"
+        matTooltip="Idle agents">
+        <mat-icon matChipStart>pause_circle</mat-icon>
+        <span class="chip-count">{{ summary().idle }}</span>
+        <span class="chip-label">Idle</span>
+      </mat-chip>
+
+      <mat-chip
+        class="status-chip chip-thinking"
+        [class.has-count]="summary().thinking > 0"
+        matTooltip="Thinking agents">
+        <mat-icon matChipStart>psychology</mat-icon>
+        <span class="chip-count">{{ summary().thinking }}</span>
+        <span class="chip-label">Thinking</span>
+      </mat-chip>
+
+      <mat-chip
+        class="status-chip chip-error"
+        [class.has-count]="hasErrors()"
+        matTooltip="Agents in error">
+        <mat-icon matChipStart>error</mat-icon>
+        <span class="chip-count">{{ summary().error }}</span>
+        <span class="chip-label">Error</span>
+      </mat-chip>
+    </mat-chip-set>
+  </div>
+
+</section>
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.scss
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.scss
@@ -0,0 +1,174 @@
+/**
+ * Dashboard Summary Component Styles
+ * Touch-optimized for kiosk (Raspberry Pi 5) and mobile PWA
+ * Uses Angular Material utility classes where possible
+ */
+
+// Touch-optimized sizing
+$touch-target-min: 48px;
+$kiosk-font-primary: 20px;
+$mobile-font-primary: 16px;
+$spacing-unit: 8px;
+
+// Status colors — high contrast for workshop/bright environments
+$color-active: #4ade70;    // Green — printing/active
+$color-idle: #94a3b8;      // Gray — idle/offline
+$color-thinking: #60a5fa;  // Blue — thinking/processing
+$color-error: #f87171;     // Red — error/failed
+$color-connected: #4ade70; // Green — SignalR connected
+$color-disconnected: #f87171; // Red — disconnected
+
+.dashboard-summary {
+  display: flex;
+  align-items: center;
+  gap: $spacing-unit * 2;
+  padding: $spacing-unit * 2;
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+
+  // Responsive: on mobile, allow horizontal scroll
+  @media (max-width: 480px) {
+    padding: $spacing-unit;
+    gap: $spacing-unit;
+  }
+}
+
+.summary-item {
+  display: flex;
+  align-items: center;
+  gap: $spacing-unit;
+  min-height: $touch-target-min;
+  white-space: nowrap;
+
+  .metric-value {
+    font-size: $kiosk-font-primary;
+    font-weight: 600;
+    line-height: 1.2;
+
+    @media (max-width: 480px) {
+      font-size: $mobile-font-primary;
+    }
+  }
+
+  .metric-label {
+    font-size: 12px;
+    color: rgba(255, 255, 255, 0.7);
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+
+    @media (max-width: 480px) {
+      font-size: 10px;
+    }
+  }
+}
+
+// Health indicator
+.health-indicator {
+  padding: $spacing-unit $spacing-unit * 2;
+  border-radius: 24px;
+  transition: background-color 0.3s ease;
+
+  &.healthy {
+    background-color: rgba($color-active, 0.15);
+  }
+
+  &.degraded {
+    background-color: rgba($color-thinking, 0.15);
+  }
+
+  &.down {
+    background-color: rgba($color-error, 0.15);
+  }
+
+  .connection-dot {
+    width: 12px;
+    height: 12px;
+    border-radius: 50%;
+    display: inline-block;
+    transition: background-color 0.3s ease;
+
+    &.connected {
+      background-color: $color-connected;
+      box-shadow: 0 0 6px $color-connected;
+    }
+
+    &:not(.connected) {
+      background-color: $color-disconnected;
+      box-shadow: 0 0 6px $color-disconnected;
+    }
+  }
+
+  .health-label {
+    font-size: 14px;
+    font-weight: 500;
+
+    @media (max-width: 480px) {
+      font-size: 12px;
+    }
+  }
+}
+
+// Status breakdown chips
+.status-breakdown {
+  flex-shrink: 0;
+}
+
+.status-chip {
+  min-height: $touch-target-min !important;
+  font-size: 14px !important;
+
+  @media (max-width: 480px) {
+    min-height: 40px !important;
+    font-size: 12px !important;
+    padding: 0 8px !important;
+  }
+
+  .chip-count {
+    font-weight: 700;
+    margin: 0 4px;
+  }
+
+  .chip-label {
+    font-size: 12px;
+    opacity: 0.8;
+  }
+
+  mat-icon {
+    font-size: 18px !important;
+    width: 18px !important;
+    height: 18px !important;
+  }
+}
+
+// Status chip color variants
+.chip-active {
+  --mdc-chip-outline-color: #{$color-active};
+
+  &.has-count {
+    background-color: rgba($color-active, 0.15) !important;
+  }
+}
+
+.chip-idle {
+  --mdc-chip-outline-color: #{$color-idle};
+
+  &.has-count {
+    background-color: rgba($color-idle, 0.15) !important;
+  }
+}
+
+.chip-thinking {
+  --mdc-chip-outline-color: #{$color-thinking};
+
+  &.has-count {
+    background-color: rgba($color-thinking, 0.15) !important;
+  }
+}
+
+.chip-error {
+  --mdc-chip-outline-color: #{$color-error};
+
+  &.has-count {
+    background-color: rgba($color-error, 0.2) !important;
+  }
+}
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.spec.ts
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.spec.ts
@@ -0,0 +1,103 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+import { DashboardSummaryComponent } from './dashboard-summary.component';
+import { AgentSummary, SystemHealth } from '../../models/agent.model';
+
+describe('DashboardSummaryComponent', () => {
+  let component: DashboardSummaryComponent;
+  let fixture: ComponentFixture<DashboardSummaryComponent>;
+
+  const mockSummary: AgentSummary = {
+    total: 7,
+    active: 4,
+    idle: 1,
+    thinking: 1,
+    error: 1,
+  };
+
+  const mockHealthy: SystemHealth = {
+    connected: true,
+    status: 'healthy',
+  };
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [DashboardSummaryComponent],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(DashboardSummaryComponent);
+    component = fixture.componentInstance;
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  it('should default to zeroed summary', () => {
+    const summary = component.summary();
+    expect(summary.total).toBe(0);
+    expect(summary.active).toBe(0);
+    expect(summary.idle).toBe(0);
+    expect(summary.thinking).toBe(0);
+    expect(summary.error).toBe(0);
+  });
+
+  it('should default to disconnected/down health', () => {
+    const health = component.health();
+    expect(health.connected).toBe(false);
+    expect(health.status).toBe('down');
+  });
+
+  it('should update summary data', () => {
+    component.updateSummary(mockSummary);
+    expect(component.summary()).toEqual(mockSummary);
+  });
+
+  it('should update health data', () => {
+    component.updateHealth(mockHealthy);
+    expect(component.health()).toEqual(mockHealthy);
+  });
+
+  it('should compute hasErrors correctly', () => {
+    expect(component.hasErrors()).toBe(false);
+    component.updateSummary({ ...mockSummary, error: 2 });
+    expect(component.hasErrors()).toBe(true);
+  });
+
+  it('should compute connectionColor correctly', () => {
+    expect(component.connectionColor()).toBe('disconnected');
+    component.updateHealth({ connected: true, status: 'healthy' });
+    expect(component.connectionColor()).toBe('connected');
+  });
+
+  it('should compute statusLabel for each state', () => {
+    component.updateHealth({ connected: true, status: 'healthy' });
+    expect(component.statusLabel()).toBe('All Systems Go');
+
+    component.updateHealth({ connected: true, status: 'degraded' });
+    expect(component.statusLabel()).toBe('Degraded');
+
+    component.updateHealth({ connected: false, status: 'down' });
+    expect(component.statusLabel()).toBe('Offline');
+  });
+
+  it('should render summary values in template', () => {
+    component.updateSummary(mockSummary);
+    component.updateHealth(mockHealthy);
+    fixture.detectChanges();
+
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.textContent).toContain('4 / 7');
+    expect(compiled.textContent).toContain('Active');
+    expect(compiled.textContent).toContain('All Systems Go');
+  });
+
+  it('should render status breakdown chips', () => {
+    component.updateSummary(mockSummary);
+    fixture.detectChanges();
+
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.textContent).toContain('4');  // active count
+    expect(compiled.textContent).toContain('1');   // idle count (multiple)
+    expect(compiled.textContent).toContain('Error');
+  });
+});
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.ts
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.ts
@@ -0,0 +1,80 @@
+import { ChangeDetectionStrategy, Component, Input, OnDestroy, signal, computed } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { MatButtonModule } from '@angular/material/button';
+import { MatIconModule } from '@angular/material/icon';
+import { MatChipsModule } from '@angular/material/chips';
+import { MatTooltipModule } from '@angular/material/tooltip';
+import { AgentSummary, SystemHealth } from '../../models/agent.model';
+
+@Component({
+  selector: 'app-dashboard-summary',
+  standalone: true,
+  imports: [
+    CommonModule,
+    MatButtonModule,
+    MatIconModule,
+    MatChipsModule,
+    MatTooltipModule,
+  ],
+  templateUrl: './dashboard-summary.component.html',
+  styleUrls: ['./dashboard-summary.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class DashboardSummaryComponent implements OnDestroy {
+  /** Agent summary data — reactive signal, updatable via updateSummary() */
+  readonly summary = signal<AgentSummary>({
+    total: 0,
+    active: 0,
+    idle: 0,
+    thinking: 0,
+    error: 0,
+  });
+
+  /** System health data — reactive signal, updatable via updateHealth() */
+  readonly health = signal<SystemHealth>({
+    connected: false,
+    status: 'down',
+  });
+
+  /** Computed signal: whether there are errors to highlight */
+  readonly hasErrors = computed(() => this.summary().error > 0);
+
+  /** Computed signal: whether system is degraded */
+  readonly isDegraded = computed(() => this.health().status === 'degraded');
+
+  /** Computed signal: whether system is down */
+  readonly isDown = computed(() => this.health().status === 'down');
+
+  /** Computed signal: connection indicator color */
+  readonly connectionColor = computed(() =>
+    this.health().connected ? 'connected' : 'disconnected'
+  );
+
+  /** Computed signal: overall status label */
+  readonly statusLabel = computed(() => {
+    const h = this.health();
+    if (h.status === 'healthy') return 'All Systems Go';
+    if (h.status === 'degraded') return 'Degraded';
+    return 'Offline';
+  });
+
+  /**
+   * Update the agent summary. Called by the parent or a service
+   * when new data arrives (e.g., via SignalR).
+   */
+  updateSummary(data: AgentSummary): void {
+    this.summary.set(data);
+  }
+
+  /**
+   * Update the system health. Called by the parent or a service
+   * when the connection state changes.
+   */
+  updateHealth(data: SystemHealth): void {
+    this.health.set(data);
+  }
+
+  ngOnDestroy(): void {
+    // Cleanup handled by signals — no manual subscription teardown needed
+  }
+}
--- a/frontend/src/app/models/agent.model.ts
+++ b/frontend/src/app/models/agent.model.ts
@@ -0,0 +1,24 @@
+/**
+ * Represents the status of a single agent/printer in the system.
+ */
+export type AgentStatus = 'active' | 'idle' | 'thinking' | 'error';
+
+export interface AgentSummary {
+  /** Total number of agents in the system */
+  total: number;
+  /** Number of currently active agents */
+  active: number;
+  /** Number of currently idle agents */
+  idle: number;
+  /** Number of currently thinking/processing agents */
+  thinking: number;
+  /** Number of agents in error state */
+  error: number;
+}
+
+export interface SystemHealth {
+  /** Whether the SignalR connection is live */
+  connected: boolean;
+  /** Overall system health: healthy, degraded, or down */
+  status: 'healthy' | 'degraded' | 'down';
+}
--- a/frontend/src/index.html
+++ b/frontend/src/index.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>Frontend</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link
+      href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap"
+      rel="stylesheet"
+    />
+    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -0,0 +1,6 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { App } from './app/app';
+
+bootstrapApplication(App, appConfig)
+  .catch((err) => console.error(err));
--- a/frontend/src/styles.scss
+++ b/frontend/src/styles.scss
@@ -0,0 +1,39 @@
+// Include theming for Angular Material with `mat.theme()`.
+// This Sass mixin will define CSS variables that are used for styling Angular Material
+// components according to the Material 3 design spec.
+// Learn more about theming and how to use it for your application's
+// custom components at https://material.angular.dev/guide/theming
+@use '@angular/material' as mat;
+
+html {
+  height: 100%;
+  @include mat.theme(
+    (
+      color: (
+        primary: mat.$azure-palette,
+        tertiary: mat.$blue-palette,
+      ),
+      typography: Roboto,
+      density: 0,
+    )
+  );
+}
+
+body {
+  // Default the application to a light color theme. This can be changed to
+  // `dark` to enable the dark color theme, or to `light dark` to defer to the
+  // user's system settings.
+  color-scheme: light;
+
+  // Set a default background, font and text colors for the application using
+  // Angular Material's system-level CSS variables. Learn more about these
+  // variables at https://material.angular.dev/guide/system-variables
+  background-color: var(--mat-sys-surface);
+  color: var(--mat-sys-on-surface);
+  font: var(--mat-sys-body-medium);
+
+  // Reset the user agent margin.
+  margin: 0;
+  height: 100%;
+}
+/* You can add global styles to this file, and also import other style files */
--- a/frontend/tsconfig.app.json
+++ b/frontend/tsconfig.app.json
@@ -0,0 +1,15 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/app",
+    "types": []
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "exclude": [
+    "src/**/*.spec.ts"
+  ]
+}
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -0,0 +1,33 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "isolatedModules": true,
+    "experimentalDecorators": true,
+    "importHelpers": true,
+    "target": "ES2022",
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}
--- a/frontend/tsconfig.spec.json
+++ b/frontend/tsconfig.spec.json
@@ -0,0 +1,15 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/spec",
+    "types": [
+      "vitest/globals"
+    ]
+  },
+  "include": [
+    "src/**/*.d.ts",
+    "src/**/*.spec.ts"
+  ]
+}