feat(frontend): checklist de complexite du mot de passe sur reset-password

Remplace l'indice statique sous le champ nouveau mot de passe par une
checklist qui coche chaque regle (longueur, majuscule, minuscule,
chiffre, caractere special) au fur et a mesure de la saisie. Les regles
individuelles (PASSWORD_REQUIREMENTS) sont exposees depuis le meme
validateur que PASSWORD_PATTERN pour rester la seule source de verite.

apps/frontend/src/app/shared/components/password-requirements/password-requirements.html

@@ -0,0 +1,8 @@
+<ul class="password-requirements">
+  @for (requirement of requirements(); track requirement.label) {
+    <li [class.met]="requirement.met" [class.unmet]="!requirement.met">
+      <span class="password-requirements-icon">{{ requirement.met ? '✓' : '○' }}</span>
+      {{ requirement.label }}
+    </li>
+  }
+</ul>

apps/frontend/src/app/shared/components/password-requirements/password-requirements.scss

@@ -0,0 +1,29 @@
+:host {
+  display: block;
+}
+
+.password-requirements {
+  list-style: none;
+  margin: 0.25rem 0 0;
+  padding: 0;
+  font-size: 0.8rem;
+  line-height: 1.5;
+
+  li {
+    display: flex;
+    align-items: center;
+    gap: 0.4rem;
+  }
+
+  .password-requirements-icon {
+    font-weight: 700;
+  }
+
+  .unmet {
+    color: #9ca3af;
+  }
+
+  .met {
+    color: #16a34a;
+  }
+}

apps/frontend/src/app/shared/components/password-requirements/password-requirements.spec.ts

@@ -0,0 +1,39 @@
+import { TestBed } from '@angular/core/testing';
+import { PasswordRequirementsChecklist } from './password-requirements';
+
+describe('PasswordRequirementsChecklist', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [PasswordRequirementsChecklist],
+    }).compileComponents();
+  });
+
+  it('ne coche aucune règle pour un mot de passe vide', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', '');
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.requirements().every((r) => !r.met)).toBe(true);
+  });
+
+  it('ne coche que les règles satisfaites pour un mot de passe partiel', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', 'abcdefgh');
+    fixture.detectChanges();
+
+    const parLabel = new Map(fixture.componentInstance.requirements().map((r) => [r.label, r.met]));
+    expect(parLabel.get('8 caractères minimum')).toBe(true);
+    expect(parLabel.get('1 minuscule')).toBe(true);
+    expect(parLabel.get('1 majuscule')).toBe(false);
+    expect(parLabel.get('1 chiffre')).toBe(false);
+    expect(parLabel.get('1 caractère spécial')).toBe(false);
+  });
+
+  it('coche toutes les règles pour un mot de passe conforme', () => {
+    const fixture = TestBed.createComponent(PasswordRequirementsChecklist);
+    fixture.componentRef.setInput('password', 'Un-nouveau-mot-de-passe1!');
+    fixture.detectChanges();
+
+    expect(fixture.componentInstance.requirements().every((r) => r.met)).toBe(true);
+  });
+});

apps/frontend/src/app/shared/components/password-requirements/password-requirements.ts

@@ -0,0 +1,19 @@
+import { Component, computed, input } from '@angular/core';
+import { PASSWORD_REQUIREMENTS } from '../../validators/password.validator';
+
+@Component({
+  selector: 'app-password-requirements',
+  standalone: true,
+  templateUrl: './password-requirements.html',
+  styleUrl: './password-requirements.scss',
+})
+export class PasswordRequirementsChecklist {
+  password = input('');
+
+  requirements = computed(() =>
+    PASSWORD_REQUIREMENTS.map((requirement) => ({
+      label: requirement.label,
+      met: requirement.test(this.password()),
+    })),
+  );
+}

apps/frontend/src/app/shared/validators/password.validator.ts

@@ -23,3 +23,18 @@ export const passwordValidators = [
   Validators.maxLength(PASSWORD_MAX_LENGTH),
   Validators.pattern(PASSWORD_PATTERN),
 ];
+
+export interface PasswordRequirement {
+  label: string;
+  test: (value: string) => boolean;
+}
+
+const SPECIAL_REGEX = new RegExp(`[${SPECIAL_CHARACTERS}]`);
+
+export const PASSWORD_REQUIREMENTS: PasswordRequirement[] = [
+  { label: `${PASSWORD_MIN_LENGTH} caractères minimum`, test: (v) => v.length >= PASSWORD_MIN_LENGTH },
+  { label: '1 majuscule', test: (v) => /[A-ZÀ-ÖØ-Þ]/.test(v) },
+  { label: '1 minuscule', test: (v) => /[a-zà-öø-þ]/.test(v) },
+  { label: '1 chiffre', test: (v) => /[0-9]/.test(v) },
+  { label: '1 caractère spécial', test: (v) => SPECIAL_REGEX.test(v) },
+];