feat: rewrite AuthService to use ROLAC auth API with in-memory token storage

- Replace GET /api/Token/Create (Basic Auth) with POST /api/Auth/login
- Add refresh() method using HttpOnly cookie (POST /api/Auth/refresh)
- Add initializeFromRefreshToken() for APP_INITIALIZER support
- logout() now fires POST /api/Auth/logout (fire-and-forget)
- Rename User interface to UserInfo (matches C# DTO: id, email, roles, languagePreference)
- All auth state is in-memory only (no localStorage)
- Fix downstream consumers: app.ts, header components, mfa-dialog, token-verification
- Fix tsconfig.spec.json: exclude legacy src/components and src/directives
- Add stub enums.model.ts and fix models/index.ts for pre-existing build errors

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

APP/src/app/shared/models/enums.model.ts

@@ -0,0 +1,20 @@
+// Placeholder enums — expand as the escrow module is built out
+export enum EscrowStatus {
+    Open = 'Open',
+    Closed = 'Closed',
+    Cancelled = 'Cancelled'
+}
+
+export enum CbAssigneeRole {
+    None = 'None',
+    Buyer = 'Buyer',
+    Seller = 'Seller',
+    BuyerRealEstateAgent = 'BuyerRealEstateAgent',
+    SellerRealEstateAgent = 'SellerRealEstateAgent',
+    EscrowOfficer = 'EscrowOfficer',
+    EscrowAssignee = 'EscrowAssignee',
+    LoanBroker = 'LoanBroker',
+    Lender = 'Lender',
+    SellerTransactionCoordinator = 'SellerTransactionCoordinator',
+    BuyerTransactionCoordinator = 'BuyerTransactionCoordinator'
+}

APP/src/app/shared/models/index.ts

@@ -1,2 +1,11 @@
 // Export user models
-export * from './user.model';
+export * from './user.model';
+export * from './enums.model';
+
+/** Address info used by string utilities */
+export interface AddressInfo {
+    address: string;
+    city: string;
+    state: string;
+    zip: string;
+}

APP/src/app/shared/models/user.model.ts

@@ -0,0 +1,2 @@
+// User model placeholder — types live in auth.service.ts
+export {};