Fix duplicate breadcrumb and Export Center delete confirmation

BC1 — Fix "Operations > Operations > ..." duplicate breadcrumb:
- Set breadcrumb to empty string on /ops/operations parent route
  and /ops/operations (overview) route, so only the top-level
  "Operations" breadcrumb from /ops renders. Affects 7 pages:
  Feeds, Signals, Jobs, Diagnostics, Notifications, Watchlist, overview.

EC1 — Export Center delete confirmation:
- Replace window.confirm() with app-confirm-dialog variant="danger"
- Names the export profile being deleted in confirmation message
- Follows the destructive action convention from AGENTS.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Web/StellaOps.Web/src/app/features/evidence-export/export-center.component.ts

@@ -2,6 +2,7 @@
 import {
   ChangeDetectionStrategy,
   Component,
+  ViewChild,
   computed,
   inject,
   OnDestroy,
@@ -22,6 +23,7 @@ import { StellaBundleExportButtonComponent } from './stella-bundle-export-button
 import { OperatorOnlyDirective } from '../../shared/directives/operator-only.directive';
 import { DateFormatService } from '../../core/i18n/date-format.service';
 import { StellaPageTabsComponent, StellaPageTab } from '../../shared/components/stella-page-tabs/stella-page-tabs.component';
+import { ConfirmDialogComponent } from '../../shared/components/confirm-dialog/confirm-dialog.component';
 /**
  * Export Center Component (Sprint: SPRINT_20251229_016)
  * Manages export profiles and monitors export runs with SSE updates.
@@ -33,7 +35,7 @@ const EXPORT_CENTER_TABS: StellaPageTab[] = [
 
 @Component({
     selector: 'app-export-center',
-    imports: [FormsModule, StellaBundleExportButtonComponent, OperatorOnlyDirective, StellaPageTabsComponent],
+    imports: [FormsModule, StellaBundleExportButtonComponent, OperatorOnlyDirective, StellaPageTabsComponent, ConfirmDialogComponent],
     template: `
     <div class="export-center">
       <header class="page-header">
@@ -350,6 +352,11 @@ const EXPORT_CENTER_TABS: StellaPageTab[] = [
           </div>
         </div>
       }
+      <app-confirm-dialog #deleteConfirm
+        title="Delete Export Profile"
+        [message]="'Delete profile \\'' + (pendingDeleteProfile()?.name ?? '') + '\\'? This cannot be undone.'"
+        confirmLabel="Delete" cancelLabel="Cancel" variant="danger"
+        (confirmed)="executeDeleteProfile()" />
     </div>
   `,
     styles: [`
@@ -1021,10 +1028,19 @@ export class ExportCenterComponent implements OnInit, OnDestroy {
     this.closeModal();
   }
 
+  readonly pendingDeleteProfile = signal<ExportProfile | null>(null);
+  @ViewChild('deleteConfirm') deleteConfirm!: ConfirmDialogComponent;
+
   deleteProfile(profile: ExportProfile): void {
-    if (confirm(`Delete profile "${profile.name}"?`)) {
-      this.profiles.update(profiles => profiles.filter(p => p.id !== profile.id));
-    }
+    this.pendingDeleteProfile.set(profile);
+    this.deleteConfirm.open();
+  }
+
+  executeDeleteProfile(): void {
+    const profile = this.pendingDeleteProfile();
+    if (!profile) return;
+    this.profiles.update(profiles => profiles.filter(p => p.id !== profile.id));
+    this.pendingDeleteProfile.set(null);
   }
 
   runProfile(profile: ExportProfile): void {

src/Web/StellaOps.Web/src/app/routes/operations.routes.ts

@@ -6,7 +6,7 @@ export const OPERATIONS_ROUTES: Routes = [
     path: '',
     pathMatch: 'full',
     title: 'Operations',
-    data: { breadcrumb: 'Operations' },
+    data: { breadcrumb: '' },
     loadComponent: () =>
       import('../features/platform/ops/platform-ops-overview-page.component').then(
         (m) => m.PlatformOpsOverviewPageComponent,

src/Web/StellaOps.Web/src/app/routes/ops.routes.ts

@@ -10,7 +10,7 @@ export const OPS_ROUTES: Routes = [
   {
     path: 'operations',
     title: 'Operations',
-    data: { breadcrumb: 'Operations' },
+    data: { breadcrumb: '' },
     loadChildren: () => import('./operations.routes').then((m) => m.OPERATIONS_ROUTES),
   },
   {