refactor(dirt): use reactive newApplications$ in AllActivitiesService

Replace manual newApplications population with subscription to
orchestrator's reactive observable. Ensures automatic updates
when applicationData changes.

- Subscribe to dataService.newApplications$
- Add setNewApplications() helper method
- Remove newApplications update from setAllAppsReportSummary()
- Data now flows through dedicated observable pipeline

Related to PM-27284

bitwarden_license/bit-common/src/dirt/reports/risk-insights/services/view/all-activities.service.ts

@@ -46,12 +46,18 @@ export class AllActivitiesService {
         this.setAllAppsReportDetails(report.reportData);
       }
     });
+
     // Critical application summary changes
     this.dataService.criticalReportResults$.subscribe((report) => {
       if (report) {
         this.setCriticalAppsReportSummary(report.summaryData);
       }
     });
+
+    // New applications changes (from orchestrator's reactive pipeline)
+    this.dataService.newApplications$.subscribe((newApps) => {
+      this.setNewApplications(newApps);
+    });
   }
 
   setCriticalAppsReportSummary(summary: OrganizationReportSummary) {
@@ -71,7 +77,7 @@ export class AllActivitiesService {
       totalAtRiskMemberCount: summary.totalAtRiskMemberCount,
       totalApplicationCount: summary.totalApplicationCount,
       totalAtRiskApplicationCount: summary.totalAtRiskApplicationCount,
-      newApplications: summary.newApplications,
+      // Note: newApplications now set separately via newApplications$ subscription
     });
   }
 
@@ -91,4 +97,15 @@ export class AllActivitiesService {
   setTaskCreatedCount(count: number) {
     this.taskCreatedCountSubject$.next(count);
   }
+
+  /**
+   * Updates the newApplications list in the report summary.
+   * Called when the orchestrator's newApplications$ observable emits.
+   */
+  private setNewApplications(newApps: string[]) {
+    this.reportSummarySubject$.next({
+      ...this.reportSummarySubject$.getValue(),
+      newApplications: newApps,
+    });
+  }
 }