[ENG-9809] add last updated on institution summary tab (#808)

- Ticket: [ENG-9809]
- Feature flag: n/a

## Purpose

add last updated on institution summary tab

Author: Vlad0n20

src/app/features/admin-institutions/pages/institutions-summary/institutions-summary.component.html

@@ -4,6 +4,13 @@
   </div>
 } @else {
   <div class="w-full">
+    @if (summaryMetrics()?.reportYearmonth) {
+      <div class="flex align-items-center gap-2 text-sm text-color-secondary mb-3 pt-3">
+        <span class="font-semibold">{{ 'adminInstitutions.summary.lastUpdated' | translate }}:</span>
+        <span class="text-color font-medium">{{ summaryMetrics()!.reportYearmonth + '-01' | date: 'MMMM d, y' }}</span>
+      </div>
+    }
+
     <div class="flex flex-wrap mt-4 gap-3 md:gap-4">
       @for (item of statisticsData; track $index) {
         <osf-statistic-card class="width-25" [label]="item.label | translate" [value]="item.value" />

src/app/features/admin-institutions/pages/institutions-summary/institutions-summary.component.ts

@@ -2,6 +2,7 @@ import { createDispatchMap, select } from '@ngxs/store';
 
 import { TranslatePipe, TranslateService } from '@ngx-translate/core';
 
+import { DatePipe } from '@angular/common';
 import { ChangeDetectionStrategy, Component, effect, inject, OnInit, signal } from '@angular/core';
 import { ActivatedRoute } from '@angular/router';
 
@@ -23,7 +24,14 @@ import {
 
 @Component({
   selector: 'osf-institutions-summary',
-  imports: [StatisticCardComponent, LoadingSpinnerComponent, DoughnutChartComponent, BarChartComponent, TranslatePipe],
+  imports: [
+    StatisticCardComponent,
+    LoadingSpinnerComponent,
+    DoughnutChartComponent,
+    BarChartComponent,
+    TranslatePipe,
+    DatePipe,
+  ],
   templateUrl: './institutions-summary.component.html',
   styleUrl: './institutions-summary.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,

src/assets/i18n/en.json

@@ -2836,6 +2836,7 @@
     },
     "summary": {
       "title": "Summary",
+      "lastUpdated": "Last Updated",
       "totalUsersByDepartment": "Total Users by Department",
       "publicPrivateProjects": "Public vs Private Projects",
       "publicEmbargoedRegistrations": "Public vs Embargoed Registrations",