test: Ajouter les tests unitaires manquants (backend et frontend)

Couverture des processors (RefreshToken, RequestPasswordReset,
ResetPassword, SwitchRole, UpdateUserRoles), des query handlers
(HasGradesInPeriod, HasStudentsInClass), des messaging handlers
(SendActivationConfirmation, SendPasswordResetEmail), et côté
frontend des modules auth, roles, monitoring, types et E2E tokens.

backend/tests/Unit/Administration/Application/Query/HasGradesInPeriod/HasGradesInPeriodHandlerTest.php

@@ -0,0 +1,96 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Administration\Application\Query\HasGradesInPeriod;
+
+use App\Administration\Application\Port\GradeExistenceChecker;
+use App\Administration\Application\Query\HasGradesInPeriod\HasGradesInPeriodHandler;
+use App\Administration\Application\Query\HasGradesInPeriod\HasGradesInPeriodQuery;
+use App\Administration\Domain\Model\SchoolClass\AcademicYearId;
+use App\Shared\Domain\Tenant\TenantId;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests for HasGradesInPeriodHandler.
+ *
+ * Key invariants:
+ * - Delegates to GradeExistenceChecker port
+ * - Returns boolean indicating grade presence
+ * - Correctly passes tenantId, academicYearId, and periodSequence
+ */
+final class HasGradesInPeriodHandlerTest extends TestCase
+{
+    private const string TENANT_ID = 'a1b2c3d4-e5f6-7890-abcd-ef1234567890';
+    private const string ACADEMIC_YEAR_ID = '550e8400-e29b-41d4-a716-446655440010';
+
+    #[Test]
+    public function returnsTrueWhenGradesExist(): void
+    {
+        $checker = $this->createMock(GradeExistenceChecker::class);
+        $checker->expects(self::once())
+            ->method('hasGradesInPeriod')
+            ->with(
+                self::callback(static fn (TenantId $t) => (string) $t === self::TENANT_ID),
+                self::callback(static fn (AcademicYearId $a) => (string) $a === self::ACADEMIC_YEAR_ID),
+                1,
+            )
+            ->willReturn(true);
+
+        $handler = new HasGradesInPeriodHandler($checker);
+
+        $query = new HasGradesInPeriodQuery(
+            tenantId: self::TENANT_ID,
+            academicYearId: self::ACADEMIC_YEAR_ID,
+            periodSequence: 1,
+        );
+
+        $result = ($handler)($query);
+
+        self::assertTrue($result);
+    }
+
+    #[Test]
+    public function returnsFalseWhenNoGrades(): void
+    {
+        $checker = $this->createMock(GradeExistenceChecker::class);
+        $checker->method('hasGradesInPeriod')->willReturn(false);
+
+        $handler = new HasGradesInPeriodHandler($checker);
+
+        $query = new HasGradesInPeriodQuery(
+            tenantId: self::TENANT_ID,
+            academicYearId: self::ACADEMIC_YEAR_ID,
+            periodSequence: 2,
+        );
+
+        $result = ($handler)($query);
+
+        self::assertFalse($result);
+    }
+
+    #[Test]
+    public function passesCorrectPeriodSequence(): void
+    {
+        $checker = $this->createMock(GradeExistenceChecker::class);
+        $checker->expects(self::once())
+            ->method('hasGradesInPeriod')
+            ->with(
+                self::anything(),
+                self::anything(),
+                3,
+            )
+            ->willReturn(false);
+
+        $handler = new HasGradesInPeriodHandler($checker);
+
+        $query = new HasGradesInPeriodQuery(
+            tenantId: self::TENANT_ID,
+            academicYearId: self::ACADEMIC_YEAR_ID,
+            periodSequence: 3,
+        );
+
+        ($handler)($query);
+    }
+}