feat: add unit and integration tests for rental management domain

- Introduced RentPaymentCorrectionTest and RentPaymentTest to validate payment and refund logic.
- Added PhoneNumberTest to ensure proper normalization of phone numbers.
- Created TenantTest to verify attachment management and tenant referencing.
- Implemented ReplacementRentalApiJourneyIT for end-to-end testing of rental and payment workflows.
- Documented architectural decisions in ADR-0014, emphasizing strict DDD boundaries and transaction management.

frontend/src/app/app.html

@@ -1,8 +1,10 @@
-@if (session.status() === 'checking') {
+@if (session.status() === 'checking' || session.status() === 'signing-out') {
   <section class="session-state" role="status" aria-live="polite">
     <app-brand-mark class="brand-mark" />
     <mat-spinner diameter="34" />
-    <strong>Vérification de votre session…</strong>
+    <strong>{{
+      session.status() === 'signing-out' ? 'Déconnexion…' : 'Vérification de votre session…'
+    }}</strong>
   </section>
 } @else if (session.status() === 'error') {
   <section class="session-state" role="alert">

frontend/src/app/app.spec.ts

@@ -12,6 +12,7 @@ describe('App', () => {
     username: signal(''),
     email: signal(''),
     refresh: vi.fn(),
+    logout: vi.fn(),
   };
 
   beforeEach(() => {

frontend/src/app/app.ts

@@ -37,6 +37,6 @@ export class App implements OnInit {
   }
 
   logout() {
-    window.location.href = '/logout';
+    this.session.logout();
   }
 }

frontend/src/app/components/settings-page/settings-page.spec.ts

@@ -16,6 +16,7 @@ describe('SettingsPage', () => {
   const session = {
     username: signal('Camille Martin'),
     email: signal('camille@example.com'),
+    logout: vi.fn(),
   };
   const theme = {
     preference: signal('system'),
@@ -48,9 +49,7 @@ describe('SettingsPage', () => {
     await fixture.whenStable();
 
     expect(fixture.nativeElement.querySelector('input#firstName').value).toBe('Camille');
-    expect(fixture.nativeElement.querySelector('input#email').value).toBe(
-      'camille@example.com',
-    );
+    expect(fixture.nativeElement.querySelector('input#email').value).toBe('camille@example.com');
     expect(fixture.nativeElement.querySelector('input#address').value).toBe('1 rue de Paris');
   });
 

frontend/src/app/components/settings-page/settings-page.ts

@@ -66,7 +66,7 @@ export class SettingsPage {
   }
 
   logout(): void {
-    window.location.href = '/logout';
+    this.session.logout();
   }
 
   loadProfile(): void {

frontend/src/app/services/session.service.spec.ts

@@ -1,11 +1,11 @@
 import { HttpClient } from '@angular/common/http';
 import { TestBed } from '@angular/core/testing';
-import { of, Subject, throwError } from 'rxjs';
+import { NEVER, of, Subject, throwError } from 'rxjs';
 import { vi } from 'vitest';
 import { SessionService } from './session.service';
 
 describe('SessionService', () => {
-  const http = { get: vi.fn() };
+  const http = { get: vi.fn(), post: vi.fn() };
 
   beforeEach(() => {
     vi.clearAllMocks();
@@ -53,4 +53,15 @@ describe('SessionService', () => {
     expect(http.get).toHaveBeenCalledWith('/api/user');
     expect(service.username()).toBe('');
   });
+
+  it('posts logout with a truthful pending state', () => {
+    const service = TestBed.inject(SessionService);
+    service.status.set('authenticated');
+    http.post.mockReturnValueOnce(NEVER);
+
+    service.logout();
+
+    expect(service.status()).toBe('signing-out');
+    expect(http.post).toHaveBeenCalledWith('/logout', null, { responseType: 'text' });
+  });
 });

frontend/src/app/services/session.service.ts

@@ -7,7 +7,7 @@ interface UserResponse {
   email?: string;
 }
 
-export type SessionStatus = 'checking' | 'authenticated' | 'anonymous' | 'error';
+export type SessionStatus = 'checking' | 'authenticated' | 'anonymous' | 'signing-out' | 'error';
 
 @Injectable({ providedIn: 'root' })
 export class SessionService {
@@ -32,4 +32,18 @@ export class SessionService {
       },
     });
   }
+
+  logout(): void {
+    if (this.status() === 'signing-out') return;
+    this.status.set('signing-out');
+    this.http.post('/logout', null, { responseType: 'text' }).subscribe({
+      next: () => {
+        window.location.href = '/';
+      },
+      error: () => {
+        this.status.set('authenticated');
+        window.alert('Impossible de vous déconnecter. Réessayez.');
+      },
+    });
+  }
 }