[PM-27792] Scaffold layout desktop migration (#17658)

Introduces foundational scaffolding for the Bitwarden Desktop application UI migration

apps/desktop/src/app/app-routing.module.ts

@@ -14,6 +14,7 @@ import {
 } from "@bitwarden/angular/auth/guards";
 import { ChangePasswordComponent } from "@bitwarden/angular/auth/password-management/change-password";
 import { SetInitialPasswordComponent } from "@bitwarden/angular/auth/password-management/set-initial-password/set-initial-password.component";
+import { canAccessFeature } from "@bitwarden/angular/platform/guard/feature-flag.guard";
 import {
   DevicesIcon,
   RegistrationUserAddIcon,
@@ -39,15 +40,19 @@ import {
   TwoFactorAuthGuard,
   NewDeviceVerificationComponent,
 } from "@bitwarden/auth/angular";
+import { FeatureFlag } from "@bitwarden/common/enums/feature-flag.enum";
 import { AnonLayoutWrapperComponent, AnonLayoutWrapperData } from "@bitwarden/components";
 import { LockComponent, ConfirmKeyConnectorDomainComponent } from "@bitwarden/key-management-ui";
 
 import { maxAccountsGuardFn } from "../auth/guards/max-accounts.guard";
 import { RemovePasswordComponent } from "../key-management/key-connector/remove-password.component";
 import { VaultV2Component } from "../vault/app/vault/vault-v2.component";
+import { VaultComponent } from "../vault/app/vault-v3/vault.component";
 
 import { Fido2PlaceholderComponent } from "./components/fido2placeholder.component";
+import { DesktopLayoutComponent } from "./layout/desktop-layout.component";
 import { SendComponent } from "./tools/send/send.component";
+import { SendV2Component } from "./tools/send-v2/send-v2.component";
 
 /**
  * Data properties acceptable for use in route objects in the desktop
@@ -99,7 +104,10 @@ const routes: Routes = [
   {
     path: "vault",
     component: VaultV2Component,
-    canActivate: [authGuard],
+    canActivate: [
+      authGuard,
+      canAccessFeature(FeatureFlag.DesktopUiMigrationMilestone1, false, "new-vault", false),
+    ],
   },
   {
     path: "send",
@@ -325,6 +333,21 @@ const routes: Routes = [
       },
     ],
   },
+  {
+    path: "",
+    component: DesktopLayoutComponent,
+    canActivate: [authGuard],
+    children: [
+      {
+        path: "new-vault",
+        component: VaultComponent,
+      },
+      {
+        path: "new-sends",
+        component: SendV2Component,
+      },
+    ],
+  },
 ];
 
 @NgModule({