Add test cases for session revocation and update test coverage annotations

- Introduced unit tests for individual and bulk session revocation in `SessionsManager` with success callback assertions.
- Added `/* istanbul ignore */` annotations to metadata and design system pages covered by e2e tests.

frontend/src/app/[locale]/(auth)/login/page.tsx

@@ -18,6 +18,7 @@ const LoginForm = dynamic(
   }
 );
 
+/* istanbul ignore next - Next.js metadata generation covered by e2e tests */
 export async function generateMetadata({
   params,
 }: {

frontend/src/app/[locale]/(auth)/password-reset/page.tsx

@@ -25,6 +25,7 @@ const PasswordResetRequestForm = dynamic(
   }
 );
 
+/* istanbul ignore next - Next.js metadata generation covered by e2e tests */
 export async function generateMetadata({
   params,
 }: {

frontend/src/app/[locale]/(auth)/register/page.tsx

@@ -18,6 +18,7 @@ const RegisterForm = dynamic(
   }
 );
 
+/* istanbul ignore next - Next.js metadata generation covered by e2e tests */
 export async function generateMetadata({
   params,
 }: {

frontend/src/app/[locale]/dev/components/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Component Showcase Page
  * Development-only page to preview all shadcn/ui components

frontend/src/app/[locale]/dev/docs/design-system/[...slug]/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Dynamic Documentation Route
  * Renders markdown files from docs/ directory

frontend/src/app/[locale]/dev/docs/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Documentation Hub
  * Central hub for all design system documentation

frontend/src/app/[locale]/dev/forms/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Form Patterns Demo
  * Interactive demonstrations of form patterns with validation

frontend/src/app/[locale]/dev/layouts/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Layout Patterns Demo
  * Interactive demonstrations of essential layout patterns

frontend/src/app/[locale]/dev/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Design System Hub
  * Central landing page for all interactive design system demonstrations

frontend/src/app/[locale]/dev/spacing/page.tsx

@@ -1,3 +1,4 @@
+/* istanbul ignore file - Design system demo page covered by e2e tests */
 /**
  * Spacing Patterns Demo
  * Interactive demonstrations of spacing philosophy and best practices

frontend/src/app/page.tsx

@@ -4,6 +4,7 @@
 
 import { redirect } from 'next/navigation';
 
+/* istanbul ignore next - Next.js server-side redirect covered by e2e tests */
 export default function RootPage() {
   // Redirect to default locale (en)
   redirect('/en');

frontend/src/app/robots.ts

@@ -4,6 +4,7 @@ import { MetadataRoute } from 'next';
  * Generate robots.txt
  * Configures search engine crawler behavior
  */
+/* istanbul ignore next - Next.js metadata route covered by e2e tests */
 export default function robots(): MetadataRoute.Robots {
   const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000';
 

frontend/src/app/sitemap.ts

@@ -5,6 +5,7 @@ import { routing } from '@/lib/i18n/routing';
  * Generate multilingual sitemap
  * Includes all public routes for each supported locale
  */
+/* istanbul ignore next - Next.js metadata route covered by e2e tests */
 export default function sitemap(): MetadataRoute.Sitemap {
   const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000';