PR followup:

- removed `DesktopRoutedVaultFilterBridgeService`
- added 'baseRoute' injectable in `RoutedVaultFilterService`
- removed `folderAddEditModalRef` from `VaultComponent`

libs/vault/src/services/routed-vault-filter.service.ts

@@ -1,14 +1,20 @@
-import { Injectable, OnDestroy } from "@angular/core";
+import { Injectable, OnDestroy, inject } from "@angular/core";
 import { ActivatedRoute, NavigationExtras } from "@angular/router";
 import { combineLatest, map, Observable, Subject, takeUntil } from "rxjs";
 
 import { CollectionId, OrganizationId } from "@bitwarden/common/types/guid";
+import { SafeInjectionToken } from "@bitwarden/ui-common";
 
 import {
   isRoutedVaultFilterItemType,
   RoutedVaultFilterModel,
 } from "../models/routed-vault-filter.model";
 
+/**
+ * Injection token for the base route path used in vault filter navigation.
+ */
+export const VAULT_FILTER_BASE_ROUTE = new SafeInjectionToken<string>("VaultFilterBaseRoute");
+
 /**
  * This service is an abstraction layer on top of ActivatedRoute that
  * encapsulates the logic of how filters are stored in the URL.
@@ -19,6 +25,7 @@ import {
 @Injectable()
 export class RoutedVaultFilterService implements OnDestroy {
   private onDestroy = new Subject<void>();
+  private baseRoute: string = inject(VAULT_FILTER_BASE_ROUTE, { optional: true }) ?? "";
 
   /**
    * Filter values extracted from the URL.
@@ -64,7 +71,7 @@ export class RoutedVaultFilterService implements OnDestroy {
    * @returns route that can be used with Router or RouterLink
    */
   createRoute(filter: RoutedVaultFilterModel): [commands: any[], extras?: NavigationExtras] {
-    const commands: string[] = [];
+    const commands: string[] = this.baseRoute ? [this.baseRoute] : [];
     const extras: NavigationExtras = {
       queryParams: {
         collectionId: filter.collectionId ?? null,