CUB-122: Scaffold Control Center React frontend

frontend-legacy/src/app/components/adaptive-navigation/adaptive-navigation.component.ts

@@ -0,0 +1,84 @@
+import { ChangeDetectionStrategy, Component, signal, HostListener, OnDestroy, OnInit } from '@angular/core';
+import { RouterLink, RouterLinkActive } from '@angular/router';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { MatChipsModule } from '@angular/material/chips';
+import { MatBadgeModule } from '@angular/material/badge';
+import { NAV_DESTINATIONS } from '../../models/nav.model';
+
+/**
+ * Adaptive Navigation Component — switches between desktop sidebar
+ * and mobile header layouts using CSS media queries + JS breakpoint sync.
+ *
+ * Per CUB-27 spec breakpoints:
+ *   Compact  (0–599px):  Mobile header + hamburger + bottom nav
+ *   Medium   (600–1023px): Collapsed sidebar (icon-only)
+ *   Expanded (≥1024px):  Expandable sidebar (hover/click)
+ *
+ * The LIVE status indicator is visible in all layouts.
+ */
+@Component({
+  selector: 'app-adaptive-navigation',
+  standalone: true,
+  imports: [
+    RouterLink,
+    RouterLinkActive,
+    MatIconModule,
+    MatButtonModule,
+    MatChipsModule,
+    MatBadgeModule,
+  ],
+  templateUrl: './adaptive-navigation.component.html',
+  styleUrl: './adaptive-navigation.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AdaptiveNavigationComponent implements OnInit, OnDestroy {
+  /** Navigation destinations shared with other nav components */
+  protected readonly destinations = NAV_DESTINATIONS;
+
+  /** Whether the mobile drawer is open */
+  protected readonly mobileMenuOpen = signal(false);
+
+  /** Live connection status */
+  protected readonly isConnected = signal(true);
+
+  /** Responsive breakpoint state */
+  protected readonly isMedium = signal(false);
+  protected readonly isExpanded = signal(false);
+
+  private readonly COMPACT_MAX = 599;
+  private readonly MEDIUM_MAX = 1023;
+
+  ngOnInit(): void {
+    this.updateBreakpoint();
+  }
+
+  @HostListener('window:resize')
+  onResize(): void {
+    this.updateBreakpoint();
+  }
+
+  /** Toggle mobile menu */
+  toggleMobileMenu(): void {
+    this.mobileMenuOpen.update((v) => !v);
+  }
+
+  /** Close mobile menu (e.g. on nav) */
+  closeMobileMenu(): void {
+    this.mobileMenuOpen.set(false);
+  }
+
+  private updateBreakpoint(): void {
+    const w = window.innerWidth;
+    this.isMedium.set(w >= this.COMPACT_MAX + 1 && w <= this.MEDIUM_MAX);
+    this.isExpanded.set(w > this.MEDIUM_MAX);
+    // Close mobile menu when switching to desktop
+    if (w > this.COMPACT_MAX) {
+      this.mobileMenuOpen.set(false);
+    }
+  }
+
+  ngOnDestroy(): void {
+    // HostListener auto-unsubscribes
+  }
+}