feat(sso): [PM-8114] implement SSO component UI refresh

Consolidates existing SSO components into a single unified component in
libs/auth, matching the new design system. This implementation:

- Creates a new shared SsoComponent with extracted business logic
- Adds feature flag support for unauth-ui-refresh
- Updates page styling including new icons and typography
- Preserves web client claimed domain logic
- Maintains backwards compatibility with legacy views

PM-8114

---------

Co-authored-by: Jared Snider <116684653+JaredSnider-Bitwarden@users.noreply.github.com>
Co-authored-by: Jared Snider <jsnider@bitwarden.com>

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

@@ -36,6 +36,7 @@ import {
   VaultIcon,
   LoginDecryptionOptionsComponent,
   DevicesIcon,
+  SsoComponent,
   TwoFactorTimeoutIcon,
 } from "@bitwarden/auth/angular";
 import { FeatureFlag } from "@bitwarden/common/enums/feature-flag.enum";
@@ -51,7 +52,7 @@ import { LoginViaAuthRequestComponentV1 } from "../auth/login/login-via-auth-req
 import { RegisterComponent } from "../auth/register.component";
 import { RemovePasswordComponent } from "../auth/remove-password.component";
 import { SetPasswordComponent } from "../auth/set-password.component";
-import { SsoComponent } from "../auth/sso.component";
+import { SsoComponentV1 } from "../auth/sso-v1.component";
 import { TwoFactorAuthComponent } from "../auth/two-factor-auth.component";
 import { TwoFactorComponent } from "../auth/two-factor.component";
 import { UpdateTempPasswordComponent } from "../auth/update-temp-password.component";
@@ -122,7 +123,33 @@ const routes: Routes = [
   },
   { path: "accessibility-cookie", component: AccessibilityCookieComponent },
   { path: "set-password", component: SetPasswordComponent },
-  { path: "sso", component: SsoComponent },
+  ...unauthUiRefreshSwap(
+    SsoComponentV1,
+    AnonLayoutWrapperComponent,
+    {
+      path: "sso",
+    },
+    {
+      path: "sso",
+      data: {
+        pageIcon: VaultIcon,
+        pageTitle: {
+          key: "enterpriseSingleSignOn",
+        },
+        pageSubtitle: {
+          key: "singleSignOnEnterOrgIdentifierText",
+        },
+      } satisfies AnonLayoutWrapperData,
+      children: [
+        { path: "", component: SsoComponent },
+        {
+          path: "",
+          component: EnvironmentSelectorComponent,
+          outlet: "environment-selector",
+        },
+      ],
+    },
+  ),
   {
     path: "send",
     component: SendComponent,

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

@@ -18,7 +18,7 @@ import { LoginModule } from "../auth/login/login.module";
 import { RegisterComponent } from "../auth/register.component";
 import { RemovePasswordComponent } from "../auth/remove-password.component";
 import { SetPasswordComponent } from "../auth/set-password.component";
-import { SsoComponent } from "../auth/sso.component";
+import { SsoComponentV1 } from "../auth/sso-v1.component";
 import { TwoFactorOptionsComponent } from "../auth/two-factor-options.component";
 import { TwoFactorComponent } from "../auth/two-factor.component";
 import { UpdateTempPasswordComponent } from "../auth/update-temp-password.component";
@@ -92,7 +92,7 @@ import { SendComponent } from "./tools/send/send.component";
     SetPasswordComponent,
     SettingsComponent,
     ShareComponent,
-    SsoComponent,
+    SsoComponentV1,
     TwoFactorComponent,
     TwoFactorOptionsComponent,
     UpdateTempPasswordComponent,

apps/desktop/src/app/services/services.module.ts

@@ -25,6 +25,8 @@ import {
   LoginComponentService,
   SetPasswordJitService,
   LockComponentService,
+  SsoComponentService,
+  DefaultSsoComponentService,
 } from "@bitwarden/auth/angular";
 import {
   InternalUserDecryptionOptionsServiceAbstraction,
@@ -361,6 +363,11 @@ const safeProviders: SafeProvider[] = [
     useClass: LoginEmailService,
     deps: [AccountService, AuthService, StateProvider],
   }),
+  safeProvider({
+    provide: SsoComponentService,
+    useClass: DefaultSsoComponentService,
+    deps: [],
+  }),
   safeProvider({
     provide: LoginApprovalComponentServiceAbstraction,
     useClass: DesktopLoginApprovalComponentService,

apps/desktop/src/auth/sso-v1.component.ts

@@ -23,9 +23,9 @@ import { PasswordGenerationServiceAbstraction } from "@bitwarden/generator-legac
 
 @Component({
   selector: "app-sso",
-  templateUrl: "sso.component.html",
+  templateUrl: "sso-v1.component.html",
 })
-export class SsoComponent extends BaseSsoComponent {
+export class SsoComponentV1 extends BaseSsoComponent {
   constructor(
     ssoLoginService: SsoLoginServiceAbstraction,
     loginStrategyService: LoginStrategyServiceAbstraction,