[PM-10381] Fix waiting for last sync - Browser Refresh (#10438)

* [PM-10381] Add activeUserLastSync$ to SyncService

* [PM-10381] Introduce waitUtil operator

* [PM-10381] Use new activeUserLastSync$ observable to wait until a sync completes before attempting to get decrypted ciphers

* [PM-10381] Fix failing test

---------

Co-authored-by: bnagawiecki <107435978+bnagawiecki@users.noreply.github.com>

libs/common/src/platform/sync/core-sync.service.ts

@@ -1,4 +1,4 @@
-import { firstValueFrom, map, of, switchMap } from "rxjs";
+import { firstValueFrom, map, Observable, of, switchMap } from "rxjs";
 
 import { ApiService } from "../../abstractions/api.service";
 import { AccountService } from "../../auth/abstractions/account.service";
@@ -67,6 +67,17 @@ export abstract class CoreSyncService implements SyncService {
     return this.stateProvider.getUser(userId, LAST_SYNC_DATE).state$;
   }
 
+  activeUserLastSync$(): Observable<Date | null> {
+    return this.accountService.activeAccount$.pipe(
+      switchMap((a) => {
+        if (a == null) {
+          return of(null);
+        }
+        return this.lastSync$(a.id);
+      }),
+    );
+  }
+
   async setLastSync(date: Date, userId: UserId): Promise<void> {
     await this.stateProvider.getUser(userId, LAST_SYNC_DATE).update(() => date);
   }

libs/common/src/platform/sync/sync.service.ts

@@ -34,6 +34,12 @@ export abstract class SyncService {
    */
   abstract lastSync$(userId: UserId): Observable<Date | null>;
 
+  /**
+   * Retrieves a stream of the currently active user's last sync date.
+   * Or null if there is no current active user or the active user has not synced before.
+   */
+  abstract activeUserLastSync$(): Observable<Date | null>;
+
   /**
    * Optionally does a full sync operation including going to the server to gather the source
    * of truth and set that data to state.