Add script to generate Play Store screenshot sizes

- Introduced a Node.js script (`playstore-screenshot-sizes.mjs`) to resize images for Play Store screenshots based on predefined profiles (phone, tablet-7, tablet-10).
- The script reads images from a specified input directory, processes them, and saves the resized images in an output directory with appropriate naming conventions.
- Added a Bash wrapper script (`playstore-screenshot-sizes.sh`) to execute the Node.js script easily from the command line.

components/Navigation.vue

@@ -814,7 +814,7 @@
                   Einstellungen
                 </NuxtLink>
                 <NuxtLink
-                  v-if="getAuthStore()?.hasAnyRole('admin', 'vorstand')"
+                  v-if="canManageUsers"
                   to="/cms/benutzer"
                   class="block px-4 py-2 text-sm text-yellow-300 hover:text-white hover:bg-primary-700/50 rounded-lg transition-colors"
                   @click="isMobileMenuOpen = false"
@@ -849,34 +849,13 @@ const mobileSubmenu = ref(null)
 const mannschaften = ref([])
 const hasGalleryImages = ref(false)
 const showCmsDropdown = ref(false)
+const authStore = useAuthStore()
 
-// Lazy store access to avoid Pinia initialization issues
-const getAuthStore = () => {
-  try {
-    return useAuthStore()
-  } catch (e) {
-    // Fallback if Pinia is not yet initialized
-    return null
-  }
-}
-
-// Reactive auth state from store (lazy)
-const isLoggedIn = computed(() => {
-  const store = getAuthStore()
-  return store?.isLoggedIn ?? false
-})
-const isAdmin = computed(() => {
-  const store = getAuthStore()
-  return store?.isAdmin ?? false
-})
-const canAccessNewsletter = computed(() => {
-  const store = getAuthStore()
-  return store?.hasAnyRole('admin', 'vorstand', 'newsletter') ?? false
-})
-const canAccessContactRequests = computed(() => {
-  const store = getAuthStore()
-  return store?.hasAnyRole('admin', 'vorstand', 'trainer') ?? false
-})
+const isLoggedIn = computed(() => authStore.isLoggedIn)
+const isAdmin = computed(() => authStore.isAdmin)
+const canAccessNewsletter = computed(() => authStore.hasAnyRole('admin', 'vorstand', 'newsletter'))
+const canAccessContactRequests = computed(() => authStore.hasAnyRole('admin', 'vorstand', 'trainer'))
+const canManageUsers = computed(() => authStore.hasAnyRole('admin', 'vorstand'))
 
 // Automatisches Setzen des Submenus basierend auf der Route
 const currentSubmenu = computed(() => {
@@ -982,10 +961,7 @@ const handleDocumentClick = (e) => {
 onMounted(() => {
   loadMannschaften()
   checkGalleryImages()
-  const store = getAuthStore()
-  if (store) {
-    store.checkAuth()
-  }
+  authStore.checkAuth()
 
   // Close CMS dropdown when clicking outside
   document.addEventListener('click', handleDocumentClick)