diff --git a/src/App.tsx b/src/App.tsx
index afa094b..fe2f1dd 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -36,6 +36,7 @@ import { FeatureLayout } from './layouts/FeatureLayout';
 import { DashboardPage } from './pages/Dashboard';
 import { SettingsPage } from './pages/Settings';
 import { GDPRPage } from './pages/GDPR';
+import StorePage from './pages/Store';
 import { FeatureViewPage } from './pages/FeatureView';
 import { AccessManagementHub, AdminMandatesPage, AdminUsersPage, AdminUserMandatesPage, AdminFeatureAccessPage, AdminInvitationsPage, AdminMandateRolesPage, AdminFeatureRolesPage, AdminFeatureInstanceUsersPage, AdminMandateRolePermissionsPage, AdminUserAccessOverviewPage, AdminAutomationEventsPage, AdminLogsPage, AdminMandateWizardPage, AdminInvitationWizardPage } from './pages/admin';
 import { PlaygroundPage, WorkflowsPage, AutomationsPage } from './pages/workflows';
@@ -94,6 +95,7 @@ function App() {
                             <Route index element={<DashboardPage />} />
                             
                             {/* System-Seiten (ohne Instanz-Kontext) */}
+                            <Route path="store" element={<StorePage />} />
                             <Route path="settings" element={<SettingsPage />} />
                             <Route path="gdpr" element={<GDPRPage />} />
                             
diff --git a/src/api/roleApi.ts b/src/api/roleApi.ts
index 38885b7..674aa57 100644
--- a/src/api/roleApi.ts
+++ b/src/api/roleApi.ts
@@ -92,25 +92,6 @@ export async function fetchRoleById(
   }
 }
 
-/**
- * Fetch role options
- * Endpoint: GET /api/rbac/roles/options
- */
-export async function fetchRoleOptions(
-  request: ApiRequestFunction
-): Promise<any> {
-  try {
-    const data = await request({
-      url: '/api/rbac/roles/options',
-      method: 'get'
-    });
-    return data || null;
-  } catch (error: any) {
-    console.error('Error fetching role options:', error);
-    return null;
-  }
-}
-
 /**
  * Create a new role
  * Endpoint: POST /api/rbac/roles
diff --git a/src/api/storeApi.ts b/src/api/storeApi.ts
new file mode 100644
index 0000000..c4a3b7d
--- /dev/null
+++ b/src/api/storeApi.ts
@@ -0,0 +1,47 @@
+/**
+ * Store API
+ * 
+ * API layer for the Feature Store.
+ * Manages feature activation/deactivation in the root mandate's shared instances.
+ */
+
+import api from '../api';
+
+export interface StoreFeature {
+  featureCode: string;
+  label: Record<string, string>;
+  icon: string;
+  description: Record<string, string>;
+  isActive: boolean;
+  canActivate: boolean;
+  instanceId: string | null;
+}
+
+export interface StoreActivateResponse {
+  featureCode: string;
+  instanceId: string;
+  featureAccessId: string;
+  roleId: string | null;
+  activated: boolean;
+}
+
+export interface StoreDeactivateResponse {
+  featureCode: string;
+  instanceId: string;
+  deactivated: boolean;
+}
+
+export async function fetchStoreFeatures(): Promise<StoreFeature[]> {
+  const response = await api.get<StoreFeature[]>('/api/store/features');
+  return response.data;
+}
+
+export async function activateStoreFeature(featureCode: string): Promise<StoreActivateResponse> {
+  const response = await api.post<StoreActivateResponse>('/api/store/activate', { featureCode });
+  return response.data;
+}
+
+export async function deactivateStoreFeature(featureCode: string): Promise<StoreDeactivateResponse> {
+  const response = await api.post<StoreDeactivateResponse>('/api/store/deactivate', { featureCode });
+  return response.data;
+}
diff --git a/src/config/pageRegistry.tsx b/src/config/pageRegistry.tsx
index 31373e2..e4544d6 100644
--- a/src/config/pageRegistry.tsx
+++ b/src/config/pageRegistry.tsx
@@ -21,7 +21,7 @@ import {
   FaLightbulb, FaRegFileAlt, FaLink, FaComments,
   FaListAlt, FaCogs, FaChartLine, FaFileAlt, FaUserShield, FaDatabase,
   FaProjectDiagram, FaMapMarkedAlt, FaWallet, FaMoneyBillAlt, FaClock,
-  FaHeadset, FaVideo, FaHatWizard,
+  FaHeadset, FaVideo, FaHatWizard, FaStore,
 } from 'react-icons/fa';
 
 // =============================================================================
@@ -36,6 +36,7 @@ export const PAGE_ICONS: Record<string, React.ReactNode> = {
   // System pages
   'page.system.home': <FaHome />,
   'page.system.settings': <FaCog />,
+  'page.system.store': <FaStore />,
   'page.system.gdpr': <FaShieldAlt />,
 
   // Basedata pages (system-level)
diff --git a/src/hooks/useMandateRoles.ts b/src/hooks/useMandateRoles.ts
index ba425cb..4feb2a7 100644
--- a/src/hooks/useMandateRoles.ts
+++ b/src/hooks/useMandateRoles.ts
@@ -240,25 +240,6 @@ export function useMandateRoles() {
     }
   }, []);
 
-  /**
-   * Get role options (for dropdowns)
-   */
-  const fetchRoleOptions = useCallback(async (): Promise<Array<{ value: string; label: string }>> => {
-    try {
-      const response = await api.get('/api/rbac/roles/options');
-      if (Array.isArray(response.data)) {
-        return response.data.map((r: any) => ({
-          value: r.id || r.value,
-          label: r.roleLabel || r.label || r.id
-        }));
-      }
-      return [];
-    } catch (err: any) {
-      console.error('Error fetching role options:', err);
-      return [];
-    }
-  }, []);
-
   /**
    * Get users with a specific role
    */
@@ -305,7 +286,6 @@ export function useMandateRoles() {
     createRole,
     updateRole,
     deleteRole,
-    fetchRoleOptions,
     getUsersWithRole,
     getMandateRoles,
     getFeatureRoles,
diff --git a/src/hooks/useNavigation.ts b/src/hooks/useNavigation.ts
index 7450bf6..c72d8da 100644
--- a/src/hooks/useNavigation.ts
+++ b/src/hooks/useNavigation.ts
@@ -168,6 +168,14 @@ export function useNavigation(language: string = 'de'): UseNavigationReturn {
     fetchNavigation();
   }, [fetchNavigation]);
 
+  useEffect(() => {
+    const onFeaturesChanged = () => {
+      fetchNavigation();
+    };
+    window.addEventListener('features-changed', onFeaturesChanged);
+    return () => window.removeEventListener('features-changed', onFeaturesChanged);
+  }, [fetchNavigation]);
+
   // Derive static and dynamic blocks
   const staticBlocks = blocks.filter(isStaticBlock);
   const dynamicBlock = blocks.find(isDynamicBlock) || null;
diff --git a/src/hooks/useStore.ts b/src/hooks/useStore.ts
new file mode 100644
index 0000000..f13dbc3
--- /dev/null
+++ b/src/hooks/useStore.ts
@@ -0,0 +1,90 @@
+/**
+ * useStore Hook
+ * 
+ * Manages feature store interactions: loading catalog, activating/deactivating features.
+ * After each mutation, refreshes featureStore and dispatches 'features-changed' event
+ * so navigation and other components update in real-time.
+ */
+
+import { useState, useCallback, useEffect } from 'react';
+import {
+  fetchStoreFeatures,
+  activateStoreFeature,
+  deactivateStoreFeature,
+  type StoreFeature,
+} from '../api/storeApi';
+import { useFeatureStore } from '../stores/featureStore';
+
+interface UseStoreReturn {
+  features: StoreFeature[];
+  loading: boolean;
+  actionLoading: string | null;
+  error: string | null;
+  loadStore: () => Promise<void>;
+  activate: (featureCode: string) => Promise<void>;
+  deactivate: (featureCode: string) => Promise<void>;
+}
+
+export function useStore(): UseStoreReturn {
+  const [features, setFeatures] = useState<StoreFeature[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [actionLoading, setActionLoading] = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const featureStore = useFeatureStore();
+
+  const loadStore = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await fetchStoreFeatures();
+      setFeatures(data);
+    } catch (err: unknown) {
+      const msg = err instanceof Error ? err.message : 'Failed to load store';
+      setError(msg);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    loadStore();
+  }, [loadStore]);
+
+  const _refreshAfterAction = useCallback(async () => {
+    await featureStore.loadFeatures();
+    window.dispatchEvent(new CustomEvent('features-changed'));
+    await loadStore();
+  }, [featureStore, loadStore]);
+
+  const activate = useCallback(async (featureCode: string) => {
+    setActionLoading(featureCode);
+    setError(null);
+    try {
+      await activateStoreFeature(featureCode);
+      await _refreshAfterAction();
+    } catch (err: unknown) {
+      const msg = err instanceof Error ? err.message : 'Activation failed';
+      setError(msg);
+    } finally {
+      setActionLoading(null);
+    }
+  }, [_refreshAfterAction]);
+
+  const deactivate = useCallback(async (featureCode: string) => {
+    setActionLoading(featureCode);
+    setError(null);
+    try {
+      await deactivateStoreFeature(featureCode);
+      await _refreshAfterAction();
+    } catch (err: unknown) {
+      const msg = err instanceof Error ? err.message : 'Deactivation failed';
+      setError(msg);
+    } finally {
+      setActionLoading(null);
+    }
+  }, [_refreshAfterAction]);
+
+  return { features, loading, actionLoading, error, loadStore, activate, deactivate };
+}
+
+export default useStore;
diff --git a/src/hooks/useUserMandates.ts b/src/hooks/useUserMandates.ts
index cce62ca..b73838d 100644
--- a/src/hooks/useUserMandates.ts
+++ b/src/hooks/useUserMandates.ts
@@ -236,8 +236,11 @@ export function useUserMandates() {
    */
   const fetchRoles = useCallback(async (mandateId?: string): Promise<Role[]> => {
     try {
-      // Fetch roles server-side filtered by mandate (or templates if no mandateId)
-      const params = mandateId ? { mandateId } : {};
+      const params: Record<string, string> = {};
+      if (mandateId) {
+        params.mandateId = mandateId;
+        params.scopeFilter = 'mandate';
+      }
       const response = await api.get('/api/rbac/roles', { params });
       let roles: Role[] = [];
       if (response.data?.items && Array.isArray(response.data.items)) {
diff --git a/src/pages/Store.module.css b/src/pages/Store.module.css
new file mode 100644
index 0000000..c4a67da
--- /dev/null
+++ b/src/pages/Store.module.css
@@ -0,0 +1,262 @@
+/**
+ * Store Page Styles
+ */
+
+.store {
+  padding: 2rem;
+  max-width: 1000px;
+  margin: 0 auto;
+}
+
+/* Header */
+.header {
+  margin-bottom: 2rem;
+}
+
+.header h1 {
+  margin: 0;
+  font-size: 1.75rem;
+  font-weight: 700;
+  color: var(--text-primary, #1a1a1a);
+}
+
+.subtitle {
+  margin: 0.5rem 0 0;
+  color: var(--text-secondary, #666);
+  font-size: 0.9375rem;
+}
+
+/* Grid */
+.grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+  gap: 1.25rem;
+}
+
+/* Card */
+.card {
+  background: var(--surface-color, #ffffff);
+  border: 1px solid var(--border-color, #e0e0e0);
+  border-radius: 12px;
+  padding: 1.5rem;
+  display: flex;
+  flex-direction: column;
+  gap: 1rem;
+  transition: box-shadow 0.2s ease, border-color 0.2s ease;
+}
+
+.card:hover {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+  border-color: var(--border-color, #ccc);
+}
+
+.cardActive {
+  border-color: var(--primary-color, #2563eb);
+  background: var(--primary-bg, rgba(37, 99, 235, 0.04));
+}
+
+.cardHeader {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+}
+
+.cardIcon {
+  font-size: 1.75rem;
+  color: var(--primary-color, #2563eb);
+  flex-shrink: 0;
+}
+
+.cardTitle {
+  margin: 0;
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--text-primary, #1a1a1a);
+}
+
+.cardBody {
+  flex: 1;
+}
+
+.cardDescription {
+  margin: 0;
+  font-size: 0.875rem;
+  color: var(--text-secondary, #666);
+  line-height: 1.5;
+}
+
+/* Status Badge */
+.statusBadge {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.375rem;
+  font-size: 0.75rem;
+  font-weight: 500;
+  padding: 0.25rem 0.625rem;
+  border-radius: 999px;
+}
+
+.statusActive {
+  background: var(--success-bg, #ecfdf5);
+  color: var(--success-color, #059669);
+}
+
+.statusInactive {
+  background: var(--surface-color, #f5f5f5);
+  color: var(--text-secondary, #666);
+}
+
+.statusDot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: currentColor;
+}
+
+/* Actions */
+.cardActions {
+  padding-top: 0.5rem;
+  border-top: 1px solid var(--border-color, #e0e0e0);
+}
+
+.activateButton {
+  width: 100%;
+  padding: 0.625rem 1rem;
+  border: none;
+  border-radius: 8px;
+  font-size: 0.875rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  background: var(--primary-color, #2563eb);
+  color: #ffffff;
+}
+
+.activateButton:hover:not(:disabled) {
+  background: var(--primary-hover, #1d4ed8);
+}
+
+.deactivateButton {
+  width: 100%;
+  padding: 0.625rem 1rem;
+  border: 1px solid var(--border-color, #e0e0e0);
+  border-radius: 8px;
+  font-size: 0.875rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  background: transparent;
+  color: var(--text-secondary, #666);
+}
+
+.deactivateButton:hover:not(:disabled) {
+  border-color: var(--error-color, #dc2626);
+  color: var(--error-color, #dc2626);
+  background: var(--error-bg, #fef2f2);
+}
+
+.activateButton:disabled,
+.deactivateButton:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+/* Loading */
+.loading {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: 200px;
+  color: var(--text-secondary, #666);
+  font-size: 0.9375rem;
+}
+
+/* Error */
+.error {
+  background: var(--error-bg, #fef2f2);
+  border: 1px solid var(--error-border, #fecaca);
+  color: var(--error-color, #dc2626);
+  padding: 1rem 1.25rem;
+  border-radius: 8px;
+  font-size: 0.875rem;
+  margin-bottom: 1.5rem;
+}
+
+/* Empty */
+.empty {
+  text-align: center;
+  padding: 3rem 1rem;
+  color: var(--text-secondary, #666);
+  font-size: 0.9375rem;
+}
+
+/* Dark Theme */
+:global(.dark-theme) .header h1 {
+  color: var(--text-primary-dark, #ffffff);
+}
+
+:global(.dark-theme) .subtitle {
+  color: var(--text-secondary-dark, #aaa);
+}
+
+:global(.dark-theme) .card {
+  background: var(--surface-dark, #1a1a1a);
+  border-color: var(--border-dark, #333);
+}
+
+:global(.dark-theme) .card:hover {
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+  border-color: var(--border-dark, #555);
+}
+
+:global(.dark-theme) .cardActive {
+  border-color: var(--primary-color, #2563eb);
+  background: rgba(37, 99, 235, 0.08);
+}
+
+:global(.dark-theme) .cardTitle {
+  color: var(--text-primary-dark, #ffffff);
+}
+
+:global(.dark-theme) .cardDescription {
+  color: var(--text-secondary-dark, #aaa);
+}
+
+:global(.dark-theme) .statusActive {
+  background: rgba(5, 150, 105, 0.15);
+  color: var(--success-color, #34d399);
+}
+
+:global(.dark-theme) .statusInactive {
+  background: var(--surface-dark, #2a2a2a);
+  color: var(--text-secondary-dark, #aaa);
+}
+
+:global(.dark-theme) .cardActions {
+  border-top-color: var(--border-dark, #333);
+}
+
+:global(.dark-theme) .deactivateButton {
+  border-color: var(--border-dark, #444);
+  color: var(--text-secondary-dark, #aaa);
+}
+
+:global(.dark-theme) .deactivateButton:hover:not(:disabled) {
+  border-color: var(--error-color-dark, #f87171);
+  color: var(--error-color-dark, #f87171);
+  background: rgba(248, 113, 113, 0.1);
+}
+
+:global(.dark-theme) .error {
+  background: var(--error-bg-dark, #450a0a);
+  border-color: var(--error-border-dark, #991b1b);
+  color: var(--error-color-dark, #f87171);
+}
+
+:global(.dark-theme) .empty {
+  color: var(--text-secondary-dark, #aaa);
+}
+
+:global(.dark-theme) .loading {
+  color: var(--text-secondary-dark, #aaa);
+}
diff --git a/src/pages/Store.tsx b/src/pages/Store.tsx
new file mode 100644
index 0000000..0f023e7
--- /dev/null
+++ b/src/pages/Store.tsx
@@ -0,0 +1,166 @@
+/**
+ * Store Page
+ * 
+ * Feature Store where users can self-activate features in the root mandate.
+ * Uses the Shared Instance Pattern -- each feature has one shared instance,
+ * and users get their own FeatureAccess + user-role upon activation.
+ */
+
+import React from 'react';
+import { FaCogs, FaComments, FaHeadset } from 'react-icons/fa';
+import { useLanguage } from '../providers/language/LanguageContext';
+import { useStore } from '../hooks/useStore';
+import type { StoreFeature } from '../api/storeApi';
+import styles from './Store.module.css';
+
+const FEATURE_ICONS: Record<string, React.ReactNode> = {
+  automation: <FaCogs />,
+  chatplayground: <FaComments />,
+  teamsbot: <FaHeadset />,
+};
+
+const FEATURE_DESCRIPTIONS: Record<string, Record<string, string>> = {
+  automation: {
+    de: 'Erstelle und verwalte Automatisierungen, um wiederkehrende Aufgaben effizient zu erledigen.',
+    en: 'Create and manage automations to handle recurring tasks efficiently.',
+    fr: 'Creer et gerer des automatisations pour traiter efficacement les taches recurrentes.',
+  },
+  chatplayground: {
+    de: 'Teste und experimentiere mit AI-Chat-Modellen in einer interaktiven Umgebung.',
+    en: 'Test and experiment with AI chat models in an interactive environment.',
+    fr: 'Testez et experimentez avec des modeles de chat IA dans un environnement interactif.',
+  },
+  teamsbot: {
+    de: 'Integriere einen AI-Bot in deine Microsoft Teams Meetings und Channels.',
+    en: 'Integrate an AI bot into your Microsoft Teams meetings and channels.',
+    fr: 'Integrez un bot IA dans vos reunions et canaux Microsoft Teams.',
+  },
+};
+
+function _getLabel(labels: Record<string, string>, lang: string): string {
+  return labels[lang] || labels['en'] || labels['de'] || Object.values(labels)[0] || '';
+}
+
+function _getDescription(featureCode: string, lang: string): string {
+  const desc = FEATURE_DESCRIPTIONS[featureCode];
+  if (!desc) return '';
+  return desc[lang] || desc['en'] || desc['de'] || '';
+}
+
+interface FeatureCardProps {
+  feature: StoreFeature;
+  language: string;
+  actionLoading: string | null;
+  onActivate: (code: string) => void;
+  onDeactivate: (code: string) => void;
+}
+
+const FeatureCard: React.FC<FeatureCardProps> = ({
+  feature,
+  language,
+  actionLoading,
+  onActivate,
+  onDeactivate,
+}) => {
+  const isProcessing = actionLoading === feature.featureCode;
+  const icon = FEATURE_ICONS[feature.featureCode];
+
+  return (
+    <div className={`${styles.card} ${feature.isActive ? styles.cardActive : ''}`}>
+      <div className={styles.cardHeader}>
+        {icon && <span className={styles.cardIcon}>{icon}</span>}
+        <h3 className={styles.cardTitle}>
+          {_getLabel(feature.label, language)}
+        </h3>
+      </div>
+
+      <div className={styles.cardBody}>
+        <p className={styles.cardDescription}>
+          {_getDescription(feature.featureCode, language)}
+        </p>
+      </div>
+
+      <div>
+        <span className={`${styles.statusBadge} ${feature.isActive ? styles.statusActive : styles.statusInactive}`}>
+          <span className={styles.statusDot} />
+          {feature.isActive
+            ? (language === 'de' ? 'Aktiv' : language === 'fr' ? 'Actif' : 'Active')
+            : (language === 'de' ? 'Verfuegbar' : language === 'fr' ? 'Disponible' : 'Available')}
+        </span>
+      </div>
+
+      <div className={styles.cardActions}>
+        {feature.isActive ? (
+          <button
+            className={styles.deactivateButton}
+            onClick={() => onDeactivate(feature.featureCode)}
+            disabled={isProcessing}
+          >
+            {isProcessing
+              ? (language === 'de' ? 'Wird deaktiviert...' : 'Deactivating...')
+              : (language === 'de' ? 'Deaktivieren' : language === 'fr' ? 'Desactiver' : 'Deactivate')}
+          </button>
+        ) : (
+          <button
+            className={styles.activateButton}
+            onClick={() => onActivate(feature.featureCode)}
+            disabled={isProcessing || !feature.canActivate}
+          >
+            {isProcessing
+              ? (language === 'de' ? 'Wird aktiviert...' : 'Activating...')
+              : (language === 'de' ? 'Aktivieren' : language === 'fr' ? 'Activer' : 'Activate')}
+          </button>
+        )}
+      </div>
+    </div>
+  );
+};
+
+const StorePage: React.FC = () => {
+  const { currentLanguage } = useLanguage();
+  const { features, loading, actionLoading, error, activate, deactivate } = useStore();
+
+  return (
+    <div className={styles.store}>
+      <div className={styles.header}>
+        <h1>{currentLanguage === 'de' ? 'Feature Store' : currentLanguage === 'fr' ? 'Feature Store' : 'Feature Store'}</h1>
+        <p className={styles.subtitle}>
+          {currentLanguage === 'de'
+            ? 'Aktiviere Features fuer dein Konto. Deine Daten sind isoliert und nur fuer dich sichtbar.'
+            : currentLanguage === 'fr'
+              ? 'Activez des fonctionnalites pour votre compte. Vos donnees sont isolees et visibles uniquement par vous.'
+              : 'Activate features for your account. Your data is isolated and only visible to you.'}
+        </p>
+      </div>
+
+      {error && <div className={styles.error}>{error}</div>}
+
+      {loading ? (
+        <div className={styles.loading}>
+          {currentLanguage === 'de' ? 'Lade Features...' : 'Loading features...'}
+        </div>
+      ) : features.length === 0 ? (
+        <div className={styles.empty}>
+          {currentLanguage === 'de'
+            ? 'Keine Features im Store verfuegbar.'
+            : 'No features available in the store.'}
+        </div>
+      ) : (
+        <div className={styles.grid}>
+          {features.map((feature) => (
+            <FeatureCard
+              key={feature.featureCode}
+              feature={feature}
+              language={currentLanguage}
+              actionLoading={actionLoading}
+              onActivate={activate}
+              onDeactivate={deactivate}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default StorePage;