Align apartment core validation errors (#43)

frontend/src/app/components/apartment-form/apartment-form.spec.ts

@@ -50,7 +50,7 @@ describe('ApartmentForm', () => {
 
 		form.save();
 
-		expect(form.error()).toContain('Veuillez remplir tous les champs obligatoires');
+		expect(form.error()).toContain('Le nom de l’appartement est obligatoire.');
 		expect(saved).not.toHaveBeenCalled();
 	});
 
@@ -70,10 +70,70 @@ describe('ApartmentForm', () => {
 
 		form.save();
 
-		expect(form.error()).toContain('Veuillez remplir tous les champs obligatoires');
+		expect(form.nameError()).toBe('Le nom de l’appartement est obligatoire.');
+		expect(form.addressError()).toBe('L’adresse complète est obligatoire.');
 		expect(saved).not.toHaveBeenCalled();
 	});
 
+	it('accepts every strictly positive purchase price, including a sub-euro value', () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		const form = fixture.componentInstance;
+		const saved = vi.fn();
+		form.saved.subscribe(saved);
+		form.apartmentModel.set({
+			name: 'T2',
+			address: '1 rue de Paris',
+			purchasePrice: 0.5,
+			description: '',
+			privateAreas: [],
+			legalProfile: emptyApartmentLegalProfile(),
+		});
+
+		form.save();
+
+		expect(saved).toHaveBeenCalledWith(expect.objectContaining({ purchasePrice: 0.5 }));
+	});
+
+	it('shows backend core errors beside their controls and clears one when it is edited', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		const form = fixture.componentInstance;
+		const changed = vi.fn();
+		form.fieldChanged.subscribe(changed);
+		fixture.componentRef.setInput('saveFieldErrors', [
+			{ field: 'name', code: 'not_blank' },
+			{ field: 'address', code: 'not_blank' },
+		]);
+		fixture.detectChanges();
+		await fixture.whenStable();
+
+		expect(form.nameError()).toBe('Le nom de l’appartement est obligatoire.');
+		fixture.detectChanges();
+		expect(fixture.nativeElement.querySelectorAll('.field-error')[0].textContent).toContain(
+			'Le nom de l’appartement est obligatoire.',
+		);
+		expect(fixture.nativeElement.querySelectorAll('.field-error')[1].textContent).toContain(
+			'L’adresse complète est obligatoire.',
+		);
+
+		fixture.nativeElement.querySelector('input#name').dispatchEvent(new Event('input'));
+
+		expect(changed).toHaveBeenCalledWith('name');
+	});
+
+	it('keeps unknown server validation codes in the generic save alert', async () => {
+		const fixture = TestBed.createComponent(ApartmentForm);
+		fixture.componentRef.setInput('saveError', 'Veuillez corriger les champs signalés.');
+		fixture.componentRef.setInput('saveFieldErrors', [{ field: 'name', code: 'unknown' }]);
+		fixture.detectChanges();
+		await fixture.whenStable();
+		fixture.detectChanges();
+
+		expect(fixture.nativeElement.querySelector('.field-error')).toBeNull();
+		expect(fixture.nativeElement.querySelector('.alert-error').textContent).toContain(
+			'Veuillez corriger les champs signalés.',
+		);
+	});
+
 	it('emits a trimmed apartment draft when valid', () => {
 		const fixture = TestBed.createComponent(ApartmentForm);
 		const form = fixture.componentInstance;