refactor: simplify lease card and rent payments page logic

frontend/src/app/components/lease-card/lease-card.spec.ts

@@ -115,45 +115,4 @@ describe('LeaseCard', () => {
     expect(fixture.nativeElement.textContent).not.toContain('Activer');
   });
 
-  it('shows the resulting rent schedule with separate settlement and timing labels', () => {
-    const fixture = TestBed.createComponent(LeaseCard);
-    fixture.componentRef.setInput('apartments', []);
-    fixture.componentRef.setInput('tenants', []);
-    fixture.componentRef.setInput('lease', {
-      id: 'lease-1',
-      apartmentId: 'apartment-1',
-      tenantIds: [],
-      guarantors: [],
-      startDate: '2026-01-01',
-      endDate: '2026-01-31',
-      monthlyRent: 800,
-      monthlyCharges: 50,
-      securityDeposit: 800,
-      status: 'ACTIVE',
-    });
-    fixture.componentRef.setInput('rentDues', [
-      {
-        id: 'due-1',
-        leaseId: 'lease-1',
-        month: '2026-01',
-        dueDate: '2026-01-01',
-        rent: 800,
-        charges: 50,
-        total: 850,
-        remainingAmount: 850,
-        settlement: 'UNPAID',
-        timing: 'OVERDUE',
-      },
-    ]);
-    fixture.detectChanges();
-
-    const text = fixture.nativeElement.textContent.replace(/\s+/g, ' ');
-    const amounts = [...fixture.nativeElement.querySelectorAll('.rent-due dl div')].map((term) =>
-      [...term.children].map((item) => item.textContent.trim()).join(' '),
-    );
-    expect(text).toContain('2026-01');
-    expect(amounts).toEqual(['Loyer 800 €', 'Charges 50 €', 'Total 850 €', 'Restant 850 €']);
-    expect(text).toContain('Règlement : Non réglée');
-    expect(text).toContain('Temporalité : En retard');
-  });
 });