diff --git a/resources/js/Components/ArrangementConfigurator.vue b/resources/js/Components/ArrangementConfigurator.vue
index eb7d3f5..e37d94b 100644
--- a/resources/js/Components/ArrangementConfigurator.vue
+++ b/resources/js/Components/ArrangementConfigurator.vue
@@ -169,7 +169,7 @@ const deleteArrangement = () => {
 </script>
 
 <template>
-    <div class="space-y-4 rounded-lg border border-gray-200 bg-white p-4">
+    <div data-testid="arrangement-configurator" class="space-y-4 rounded-lg border border-gray-200 bg-white p-4">
         <div class="flex flex-wrap items-end gap-3">
             <div class="min-w-64 flex-1">
                 <label
@@ -179,6 +179,7 @@ const deleteArrangement = () => {
                     Arrangement
                 </label>
                 <select
+                    data-testid="arrangement-select"
                     id="arrangement-select"
                     v-model="selectedId"
                     class="block w-full rounded-md border-gray-300 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"
@@ -194,6 +195,7 @@ const deleteArrangement = () => {
             </div>
 
             <button
+                data-testid="arrangement-add-button"
                 type="button"
                 class="rounded-md bg-blue-600 px-4 py-2 text-sm font-semibold text-white shadow hover:bg-blue-700"
                 @click="addArrangement"
@@ -202,6 +204,7 @@ const deleteArrangement = () => {
             </button>
 
             <button
+                data-testid="arrangement-clone-button"
                 type="button"
                 class="rounded-md bg-slate-700 px-4 py-2 text-sm font-semibold text-white shadow hover:bg-slate-800"
                 @click="cloneArrangement"
@@ -210,6 +213,7 @@ const deleteArrangement = () => {
             </button>
 
             <button
+                data-testid="arrangement-delete-button"
                 type="button"
                 class="rounded-md bg-red-600 px-4 py-2 text-sm font-semibold text-white shadow hover:bg-red-700"
                 @click="deleteArrangement"
@@ -271,7 +275,7 @@ const deleteArrangement = () => {
                         :key="`${group.id}-${index}`"
                         class="mb-2 flex items-center gap-2 rounded-md border border-gray-200 bg-white p-2"
                     >
-                        <span class="cursor-move text-gray-500">⋮⋮</span>
+                        <span data-testid="arrangement-drag-handle" class="cursor-move text-gray-500">⋮⋮</span>
 
                         <span
                             class="inline-flex rounded-full px-3 py-1 text-sm font-semibold text-white"
@@ -291,6 +295,7 @@ const deleteArrangement = () => {
                         </label>
 
                         <button
+                            data-testid="arrangement-remove-button"
                             type="button"
                             class="rounded px-2 py-1 text-xs font-semibold text-red-600 hover:bg-red-50"
                             @click="removeGroupAt(index)"
diff --git a/resources/js/Components/Blocks/InformationBlock.vue b/resources/js/Components/Blocks/InformationBlock.vue
index 942bd24..bce22f0 100644
--- a/resources/js/Components/Blocks/InformationBlock.vue
+++ b/resources/js/Components/Blocks/InformationBlock.vue
@@ -54,7 +54,7 @@ function handleSlideUpdated() {
 </script>
 
 <template>
-    <div class="information-block space-y-6">
+    <div data-testid="information-block" class="information-block space-y-6">
         <!-- Block header -->
         <div class="border-b border-amber-200/60 pb-4">
             <div class="flex items-center justify-between">
@@ -103,6 +103,7 @@ function handleSlideUpdated() {
 
         <!-- Slide uploader — information slides are GLOBAL (service_id = null) -->
         <SlideUploader
+            data-testid="information-block-uploader"
             type="information"
             :service-id="null"
             :show-expire-date="true"
@@ -111,6 +112,7 @@ function handleSlideUpdated() {
 
         <!-- Slide grid with prominent expire dates -->
         <SlideGrid
+            data-testid="information-block-grid"
             :slides="informationSlides"
             type="information"
             :show-expire-date="true"
diff --git a/resources/js/Components/Blocks/ModerationBlock.vue b/resources/js/Components/Blocks/ModerationBlock.vue
index be06461..4637f75 100644
--- a/resources/js/Components/Blocks/ModerationBlock.vue
+++ b/resources/js/Components/Blocks/ModerationBlock.vue
@@ -37,7 +37,7 @@ function handleSlideUpdated() {
 </script>
 
 <template>
-    <div class="moderation-block space-y-6">
+    <div data-testid="moderation-block" class="moderation-block space-y-6">
         <!-- Block header -->
         <div class="border-b border-gray-200 pb-4">
             <h3 class="text-lg font-semibold text-gray-900">
@@ -50,6 +50,7 @@ function handleSlideUpdated() {
 
         <!-- Slide uploader -->
         <SlideUploader
+            data-testid="moderation-block-uploader"
             type="moderation"
             :service-id="serviceId"
             :show-expire-date="false"
@@ -58,6 +59,7 @@ function handleSlideUpdated() {
 
         <!-- Slide grid -->
         <SlideGrid
+            data-testid="moderation-block-grid"
             :slides="moderationSlides"
             type="moderation"
             :show-expire-date="false"
diff --git a/resources/js/Components/Blocks/SermonBlock.vue b/resources/js/Components/Blocks/SermonBlock.vue
index 69d238d..22aeaaf 100644
--- a/resources/js/Components/Blocks/SermonBlock.vue
+++ b/resources/js/Components/Blocks/SermonBlock.vue
@@ -37,7 +37,7 @@ function handleSlideUpdated() {
 </script>
 
 <template>
-    <div class="sermon-block space-y-6">
+    <div data-testid="sermon-block" class="sermon-block space-y-6">
         <!-- Block header -->
         <div class="border-b border-gray-200 pb-4">
             <h3 class="text-lg font-semibold text-gray-900">
@@ -50,6 +50,7 @@ function handleSlideUpdated() {
 
         <!-- Slide uploader -->
         <SlideUploader
+            data-testid="sermon-block-uploader"
             type="sermon"
             :service-id="serviceId"
             :show-expire-date="false"
@@ -58,6 +59,7 @@ function handleSlideUpdated() {
 
         <!-- Slide grid -->
         <SlideGrid
+            data-testid="sermon-block-grid"
             :slides="sermonSlides"
             type="sermon"
             :show-expire-date="false"
diff --git a/resources/js/Components/Blocks/SongsBlock.vue b/resources/js/Components/Blocks/SongsBlock.vue
index e36b275..32ef4a5 100644
--- a/resources/js/Components/Blocks/SongsBlock.vue
+++ b/resources/js/Components/Blocks/SongsBlock.vue
@@ -167,7 +167,7 @@ const toastClasses = () => {
 </script>
 
 <template>
-    <div class="space-y-4">
+    <div data-testid="songs-block" class="space-y-4">
         <Transition
             enter-active-class="transition duration-200 ease-out"
             enter-from-class="translate-y-1 opacity-0"
@@ -187,6 +187,7 @@ const toastClasses = () => {
         </Transition>
 
         <div
+            data-testid="songs-block-song-card"
             v-for="serviceSong in sortedSongs()"
             :key="serviceSong.id"
             class="space-y-4 rounded-xl border border-gray-200 bg-white p-5 shadow-sm"
@@ -242,6 +243,7 @@ const toastClasses = () => {
                     </div>
 
                     <button
+                        data-testid="songs-block-request-button"
                         type="button"
                         class="inline-flex items-center rounded-md border border-amber-300 bg-white px-3 py-2 text-xs font-semibold text-amber-800 transition hover:bg-amber-100"
                         @click="requestCreation(serviceSong.id)"
@@ -256,6 +258,7 @@ const toastClasses = () => {
                             Song suchen
                         </label>
                         <input
+                            data-testid="songs-block-search-input"
                             v-model="searchTerms[serviceSong.id]"
                             type="text"
                             placeholder="Titel oder CCLI eingeben"
@@ -268,6 +271,7 @@ const toastClasses = () => {
                             Song aus DB auswaehlen
                         </label>
                         <select
+                            data-testid="songs-block-song-select"
                             v-model="selectedSongIds[serviceSong.id]"
                             class="block w-full rounded-md border-gray-300 text-sm shadow-sm focus:border-emerald-500 focus:ring-emerald-500"
                         >
@@ -285,6 +289,7 @@ const toastClasses = () => {
                     </div>
 
                     <button
+                        data-testid="songs-block-assign-button"
                         type="button"
                         class="inline-flex items-center justify-center rounded-md bg-emerald-600 px-4 py-2 text-sm font-semibold text-white shadow transition hover:bg-emerald-700"
                         @click="assignSong(serviceSong.id)"
@@ -308,6 +313,7 @@ const toastClasses = () => {
                         class="inline-flex items-center gap-2 text-sm font-medium text-gray-800"
                     >
                         <input
+                            data-testid="songs-block-translation-checkbox"
                             v-model="translationValues[serviceSong.id]"
                             type="checkbox"
                             class="rounded border-gray-300 text-emerald-600 focus:ring-emerald-500"
@@ -327,6 +333,7 @@ const toastClasses = () => {
 
                 <div class="flex flex-wrap gap-2">
                     <button
+                        data-testid="songs-block-preview-button"
                         type="button"
                         class="inline-flex items-center rounded-md border border-gray-300 bg-white px-3 py-2 text-xs font-semibold text-gray-700 transition hover:bg-gray-50"
                         @click="showPlaceholder"
@@ -334,6 +341,7 @@ const toastClasses = () => {
                         Vorschau
                     </button>
                     <button
+                        data-testid="songs-block-download-button"
                         type="button"
                         class="inline-flex items-center rounded-md border border-gray-300 bg-white px-3 py-2 text-xs font-semibold text-gray-700 transition hover:bg-gray-50"
                         @click="showPlaceholder"
diff --git a/resources/js/Components/ConfirmDialog.vue b/resources/js/Components/ConfirmDialog.vue
index 604ad3f..c744095 100644
--- a/resources/js/Components/ConfirmDialog.vue
+++ b/resources/js/Components/ConfirmDialog.vue
@@ -81,6 +81,7 @@ const iconColors = {
 
             <div class="mt-6 flex justify-end gap-3">
                 <button
+                    data-testid="confirm-dialog-cancel-button"
                     type="button"
                     class="rounded-lg border border-gray-300 bg-white px-4 py-2 text-sm font-medium text-gray-700 shadow-sm transition hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-gray-400 focus:ring-offset-2"
                     @click="emit('cancel')"
@@ -88,6 +89,7 @@ const iconColors = {
                     {{ cancelLabel }}
                 </button>
                 <button
+                    data-testid="confirm-dialog-confirm-button"
                     type="button"
                     class="rounded-lg px-4 py-2 text-sm font-medium text-white shadow-sm transition focus:outline-none focus:ring-2 focus:ring-offset-2"
                     :class="variantClasses[variant]"
diff --git a/resources/js/Components/SlideGrid.vue b/resources/js/Components/SlideGrid.vue
index a478948..30883c3 100644
--- a/resources/js/Components/SlideGrid.vue
+++ b/resources/js/Components/SlideGrid.vue
@@ -141,7 +141,7 @@ function isExpired(expireDate) {
 </script>
 
 <template>
-    <div class="slide-grid">
+    <div data-testid="slide-grid" class="slide-grid">
         <!-- Empty state -->
         <div
             v-if="sortedSlides.length === 0"
@@ -192,6 +192,7 @@ function isExpired(expireDate) {
 
                     <!-- Delete button overlay -->
                     <button
+                        data-testid="slide-grid-delete-button"
                         @click.stop="promptDelete(slide)"
                         class="absolute right-2 top-2 flex h-7 w-7 items-center justify-center rounded-lg bg-black/50 text-white/80 opacity-0 backdrop-blur-sm transition-all duration-200 hover:bg-red-600 hover:text-white group-hover:opacity-100"
                         title="Löschen"
@@ -203,6 +204,7 @@ function isExpired(expireDate) {
 
                     <!-- Full image link overlay -->
                     <a
+                        data-testid="slide-grid-fullimage-link"
                         v-if="fullImageUrl(slide)"
                         :href="fullImageUrl(slide)"
                         target="_blank"
@@ -285,6 +287,7 @@ function isExpired(expireDate) {
                             class="flex items-center gap-1.5"
                         >
                             <input
+                                data-testid="slide-grid-expire-input"
                                 v-model="editingExpireValue"
                                 type="date"
                                 class="w-full rounded-md border border-gray-300 bg-white px-2 py-1 text-xs text-gray-700 shadow-sm focus:border-amber-400 focus:outline-none focus:ring-1 focus:ring-amber-400/40"
@@ -292,6 +295,7 @@ function isExpired(expireDate) {
                                 @keydown.escape="cancelEditExpire"
                             />
                             <button
+                                data-testid="slide-grid-expire-save"
                                 @click="saveExpireDate(slide)"
                                 class="flex h-6 w-6 shrink-0 items-center justify-center rounded-md bg-amber-500 text-white shadow-sm transition hover:bg-amber-600"
                                 title="Speichern"
@@ -301,6 +305,7 @@ function isExpired(expireDate) {
                                 </svg>
                             </button>
                             <button
+                                data-testid="slide-grid-expire-cancel"
                                 @click="cancelEditExpire"
                                 class="flex h-6 w-6 shrink-0 items-center justify-center rounded-md border border-gray-200 bg-white text-gray-500 shadow-sm transition hover:bg-gray-50"
                                 title="Abbrechen"
diff --git a/resources/js/Components/SlideUploader.vue b/resources/js/Components/SlideUploader.vue
index 5b82e97..ab810e5 100644
--- a/resources/js/Components/SlideUploader.vue
+++ b/resources/js/Components/SlideUploader.vue
@@ -122,7 +122,7 @@ function dismissError() {
 </script>
 
 <template>
-    <div class="slide-uploader">
+    <div data-testid="slide-uploader" class="slide-uploader">
         <!-- Expire date picker for information slides -->
         <div
             v-if="showExpireDate"
@@ -132,6 +132,7 @@ function dismissError() {
                 Ablaufdatum für neue Folien
             </label>
             <input
+                data-testid="slide-uploader-expire-input"
                 v-model="expireDate"
                 type="date"
                 class="rounded-lg border border-gray-200 bg-white px-3 py-1.5 text-sm text-gray-700 shadow-sm transition focus:border-amber-400 focus:outline-none focus:ring-2 focus:ring-amber-400/30"
@@ -156,6 +157,7 @@ function dismissError() {
                 </svg>
                 <span class="flex-1">{{ uploadError }}</span>
                 <button
+                    data-testid="slide-uploader-error-dismiss"
                     @click="dismissError"
                     class="shrink-0 rounded-lg p-0.5 text-red-400 transition hover:text-red-600"
                 >
@@ -196,6 +198,7 @@ function dismissError() {
 
         <!-- Dropzone -->
         <Vue3Dropzone
+            data-testid="slide-uploader-dropzone"
             v-model="files"
             :multiple="true"
             :accept="acceptedTypes"
diff --git a/resources/js/Components/SongEditModal.vue b/resources/js/Components/SongEditModal.vue
index 436eed8..f948f96 100644
--- a/resources/js/Components/SongEditModal.vue
+++ b/resources/js/Components/SongEditModal.vue
@@ -210,7 +210,7 @@ onUnmounted(() => {
                 class="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/50 p-4 sm:p-8"
                 @click="closeOnBackdrop"
             >
-                <div class="relative w-full max-w-4xl rounded-xl bg-white shadow-2xl">
+                <div data-testid="song-edit-modal" class="relative w-full max-w-4xl rounded-xl bg-white shadow-2xl">
                     <!-- Header -->
                     <div class="flex items-center justify-between border-b border-gray-200 px-6 py-4">
                         <div class="flex items-center gap-3">
@@ -299,6 +299,7 @@ onUnmounted(() => {
                             </Transition>
 
                             <button
+                                data-testid="song-edit-modal-close-button"
                                 type="button"
                                 class="rounded-lg p-2 text-gray-400 hover:bg-gray-100 hover:text-gray-600"
                                 @click="emit('close')"
@@ -371,6 +372,7 @@ onUnmounted(() => {
                         <p class="text-red-600">{{ error }}</p>
 
                         <button
+                            data-testid="song-edit-modal-error-close-button"
                             type="button"
                             class="mt-4 rounded-md bg-gray-200 px-4 py-2 text-sm font-semibold text-gray-700 hover:bg-gray-300"
                             @click="emit('close')"
@@ -399,6 +401,7 @@ onUnmounted(() => {
                                         Titel
                                     </label>
                                     <input
+                                        data-testid="song-edit-modal-title-input"
                                         id="song-edit-title"
                                         v-model="title"
                                         type="text"
@@ -417,6 +420,7 @@ onUnmounted(() => {
                                         CCLI-ID
                                     </label>
                                     <input
+                                        data-testid="song-edit-modal-ccli-input"
                                         id="song-edit-ccli"
                                         v-model="ccliId"
                                         type="text"
@@ -464,6 +468,7 @@ onUnmounted(() => {
                                         Copyright-Text
                                     </label>
                                     <textarea
+                                        data-testid="song-edit-modal-copyright-textarea"
                                         id="song-edit-copyright"
                                         v-model="copyrightText"
                                         rows="3"
diff --git a/resources/js/Components/SongPreviewModal.vue b/resources/js/Components/SongPreviewModal.vue
index 8d1fbe9..28c8491 100644
--- a/resources/js/Components/SongPreviewModal.vue
+++ b/resources/js/Components/SongPreviewModal.vue
@@ -92,7 +92,7 @@ const closeOnBackdrop = (e) => {
                 class="fixed inset-0 z-50 flex items-start justify-center overflow-y-auto bg-black/50 p-4 sm:p-8"
                 @click="closeOnBackdrop"
             >
-                <div class="relative w-full max-w-3xl rounded-xl bg-white shadow-2xl">
+                <div data-testid="song-preview-modal" class="relative w-full max-w-3xl rounded-xl bg-white shadow-2xl">
                     <!-- Header -->
                     <div class="flex items-center justify-between border-b border-gray-200 px-6 py-4">
                         <div>
@@ -107,6 +107,7 @@ const closeOnBackdrop = (e) => {
 
                         <div class="flex items-center gap-3">
                             <a
+                                data-testid="song-preview-modal-pdf-link"
                                 :href="pdfUrl"
                                 class="inline-flex items-center gap-2 rounded-lg bg-indigo-600 px-4 py-2 text-sm font-semibold text-white shadow hover:bg-indigo-700"
                                 target="_blank"
@@ -128,6 +129,7 @@ const closeOnBackdrop = (e) => {
                             </a>
 
                             <button
+                                data-testid="song-preview-modal-close-button"
                                 type="button"
                                 class="rounded-lg p-2 text-gray-400 hover:bg-gray-100 hover:text-gray-600"
                                 @click="emit('close')"
@@ -325,6 +327,7 @@ const contrastColor = (hexColor) => {
             >
                 <p class="text-red-600">{{ error }}</p>
                 <button
+                    data-testid="song-preview-modal-error-close-button"
                     type="button"
                     class="mt-4 rounded-md bg-gray-200 px-4 py-2 text-sm font-semibold text-gray-700 hover:bg-gray-300"
                     @click="close"
@@ -391,6 +394,7 @@ const contrastColor = (hexColor) => {
                 <!-- Close Button -->
                 <div class="mt-6 flex justify-end">
                     <button
+                        data-testid="song-preview-modal-bottom-close-button"
                         type="button"
                         class="rounded-md bg-gray-200 px-4 py-2 text-sm font-semibold text-gray-700 hover:bg-gray-300"
                         @click="close"
diff --git a/resources/js/Layouts/AuthenticatedLayout.vue b/resources/js/Layouts/AuthenticatedLayout.vue
index 2facbab..a18fcce 100644
--- a/resources/js/Layouts/AuthenticatedLayout.vue
+++ b/resources/js/Layouts/AuthenticatedLayout.vue
@@ -67,6 +67,7 @@ function triggerSync() {
                     <div class="flex items-center gap-1">
                         <!-- Logo / App Name -->
                         <Link
+                            data-testid="auth-layout-logo"
                             :href="route('dashboard')"
                             class="mr-6 flex items-center gap-2.5 transition-opacity hover:opacity-80"
                         >
@@ -83,12 +84,14 @@ function triggerSync() {
                         <!-- Desktop Navigation -->
                         <div class="hidden items-center gap-1 sm:flex">
                             <NavLink
+                                data-testid="auth-layout-nav-services"
                                 :href="route('services.index')"
                                 :active="route().current('services.*')"
                             >
                                 Services
                             </NavLink>
                             <NavLink
+                                data-testid="auth-layout-nav-songs"
                                 v-if="$page.props.ziggy?.routes?.['songs.index']"
                                 :href="route('songs.index')"
                                 :active="route().current('songs.*')"
@@ -111,6 +114,7 @@ function triggerSync() {
                         <!-- Sync Info & Button -->
                         <div class="flex items-center gap-3">
                             <span
+                                data-testid="auth-layout-sync-timestamp"
                                 v-if="formattedSyncDate"
                                 class="text-xs text-gray-400"
                             >
@@ -118,6 +122,7 @@ function triggerSync() {
                             </span>
 
                             <button
+                                data-testid="auth-layout-sync-button"
                                 @click="triggerSync"
                                 :disabled="syncing"
                                 class="group inline-flex items-center gap-1.5 rounded-lg border border-gray-200 bg-white px-3 py-1.5 text-xs font-medium text-gray-600 shadow-sm transition-all hover:border-amber-300 hover:bg-amber-50 hover:text-amber-700 focus:outline-none focus:ring-2 focus:ring-amber-400/40 focus:ring-offset-1 disabled:cursor-wait disabled:opacity-60"
@@ -142,6 +147,7 @@ function triggerSync() {
                             <Dropdown align="right" width="48">
                                 <template #trigger>
                                     <button
+                                        data-testid="auth-layout-user-dropdown-trigger"
                                         type="button"
                                         class="flex items-center gap-2 rounded-lg p-1.5 text-sm transition-colors hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-amber-400/40"
                                     >
@@ -180,6 +186,7 @@ function triggerSync() {
                                         {{ user?.email }}
                                     </div>
                                     <DropdownLink
+                                        data-testid="auth-layout-logout-link"
                                         :href="route('logout')"
                                         method="post"
                                         as="button"
@@ -194,6 +201,7 @@ function triggerSync() {
                     <!-- Mobile Hamburger -->
                     <div class="-me-2 flex items-center sm:hidden">
                         <button
+                            data-testid="auth-layout-mobile-hamburger"
                             @click="showingNavigationDropdown = !showingNavigationDropdown"
                             class="inline-flex items-center justify-center rounded-lg p-2 text-gray-400 transition hover:bg-gray-100 hover:text-gray-600 focus:bg-gray-100 focus:outline-none"
                         >
@@ -231,12 +239,14 @@ function triggerSync() {
                     <!-- Mobile Navigation -->
                     <div class="space-y-1 pb-3 pt-2">
                         <ResponsiveNavLink
+                            data-testid="auth-layout-mobile-nav-services"
                             :href="route('services.index')"
                             :active="route().current('services.*')"
                         >
                             Services
                         </ResponsiveNavLink>
                         <ResponsiveNavLink
+                            data-testid="auth-layout-mobile-nav-songs"
                             v-if="$page.props.ziggy?.routes?.['songs.index']"
                             :href="route('songs.index')"
                             :active="route().current('songs.*')"
@@ -248,6 +258,7 @@ function triggerSync() {
                     <!-- Mobile Sync -->
                     <div class="border-t border-gray-100 px-4 py-3">
                         <button
+                            data-testid="auth-layout-mobile-sync-button"
                             @click="triggerSync"
                             :disabled="syncing"
                             class="flex w-full items-center gap-2 rounded-lg border border-gray-200 bg-white px-3 py-2 text-sm font-medium text-gray-600 transition hover:bg-amber-50 hover:text-amber-700 disabled:opacity-60"
@@ -286,6 +297,7 @@ function triggerSync() {
 
                         <div class="mt-3 space-y-1">
                             <ResponsiveNavLink
+                                data-testid="auth-layout-mobile-logout-link"
                                 :href="route('logout')"
                                 method="post"
                                 as="button"
diff --git a/resources/js/Layouts/GuestLayout.vue b/resources/js/Layouts/GuestLayout.vue
index 1b209cb..b35ccd9 100644
--- a/resources/js/Layouts/GuestLayout.vue
+++ b/resources/js/Layouts/GuestLayout.vue
@@ -8,7 +8,7 @@ import { Link } from '@inertiajs/vue3';
         class="flex min-h-screen flex-col items-center bg-gray-100 pt-6 sm:justify-center sm:pt-0"
     >
         <div>
-            <Link href="/">
+            <Link data-testid="guest-layout-logo-link" href="/">
                 <ApplicationLogo class="h-20 w-20 fill-current text-gray-500" />
             </Link>
         </div>
diff --git a/resources/js/Layouts/MainLayout.vue b/resources/js/Layouts/MainLayout.vue
index 6c8162f..680f6b8 100644
--- a/resources/js/Layouts/MainLayout.vue
+++ b/resources/js/Layouts/MainLayout.vue
@@ -1,5 +1,5 @@
 <template>
-    <div>
+    <div data-testid="main-layout">
         <slot />
     </div>
 </template>
diff --git a/resources/js/Pages/Auth/Login.vue b/resources/js/Pages/Auth/Login.vue
index 397d83c..f025d5b 100644
--- a/resources/js/Pages/Auth/Login.vue
+++ b/resources/js/Pages/Auth/Login.vue
@@ -23,6 +23,7 @@ defineProps({
             <a
                 :href="route('auth.churchtools')"
                 class="inline-flex w-full items-center justify-center gap-2 rounded-md bg-indigo-600 px-6 py-3 text-sm font-semibold text-white shadow-sm transition hover:bg-indigo-500 focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:ring-offset-2"
+                data-testid="login-oauth-button"
             >
                 <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                     <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 7a2 2 0 012 2m4 0a6 6 0 01-7.743 5.743L11 17H9v2H7v2H4a1 1 0 01-1-1v-2.586a1 1 0 01.293-.707l5.964-5.964A6 6 0 1121 9z" />
@@ -31,6 +32,7 @@ defineProps({
             </a>
 
             <button
+                data-testid="login-test-button"
                 v-if="canDevLogin"
                 @click="router.post(route('dev-login'))"
                 class="inline-flex w-full items-center justify-center gap-2 rounded-md bg-amber-500 px-6 py-3 text-sm font-semibold text-white shadow-sm transition hover:bg-amber-600 focus:outline-none focus:ring-2 focus:ring-amber-500 focus:ring-offset-2"
diff --git a/resources/js/Pages/Dashboard.vue b/resources/js/Pages/Dashboard.vue
index eca900c..ba3a857 100644
--- a/resources/js/Pages/Dashboard.vue
+++ b/resources/js/Pages/Dashboard.vue
@@ -21,7 +21,7 @@ import { Head } from '@inertiajs/vue3';
                     class="overflow-hidden bg-white shadow-sm sm:rounded-lg"
                 >
                     <div class="p-6 text-gray-900">
-                        Du bist angemeldet als {{ $page.props.auth.user.name }}.
+                        <span data-testid="dashboard-welcome-text">Du bist angemeldet als {{ $page.props.auth.user.name }}.</span>
                     </div>
                 </div>
             </div>
diff --git a/resources/js/Pages/Services/Edit.vue b/resources/js/Pages/Services/Edit.vue
index 2b489cd..8a61352 100644
--- a/resources/js/Pages/Services/Edit.vue
+++ b/resources/js/Pages/Services/Edit.vue
@@ -123,6 +123,7 @@ function blockBadgeLabel(key) {
                 <div class="min-w-0">
                     <div class="flex items-center gap-3">
                         <button
+                            data-testid="service-edit-back-icon-button"
                             type="button"
                             class="group flex h-8 w-8 shrink-0 items-center justify-center rounded-lg border border-gray-200 bg-white text-gray-400 shadow-sm transition-all hover:border-amber-300 hover:bg-amber-50 hover:text-amber-600"
                             @click="goBack"
@@ -150,6 +151,7 @@ function blockBadgeLabel(key) {
 
                 <div class="flex items-center gap-2">
                     <button
+                        data-testid="service-edit-back-button"
                         type="button"
                         class="inline-flex items-center gap-1.5 rounded-lg border border-gray-200 bg-white px-3.5 py-2 text-sm font-medium text-gray-600 shadow-sm transition-all hover:border-gray-300 hover:bg-gray-50"
                         @click="goBack"
@@ -174,6 +176,7 @@ function blockBadgeLabel(key) {
                     >
                         <!-- Block header (clickable) -->
                         <button
+                            data-testid="service-edit-block-toggle"
                             type="button"
                             class="flex w-full items-center gap-4 px-5 py-4 text-left transition-colors hover:bg-gray-50/60"
                             @click="toggleBlock(block.key)"
diff --git a/resources/js/Pages/Services/Index.vue b/resources/js/Pages/Services/Index.vue
index f832973..481099d 100644
--- a/resources/js/Pages/Services/Index.vue
+++ b/resources/js/Pages/Services/Index.vue
@@ -176,12 +176,12 @@ function stateIconClass(isDone) {
                 </Transition>
 
                 <div class="overflow-hidden rounded-xl border border-gray-200 bg-white shadow-sm">
-                    <div v-if="services.length === 0" class="p-8 text-center text-sm text-gray-500">
+                    <div v-if="services.length === 0" data-testid="service-list-empty" class="p-8 text-center text-sm text-gray-500">
                         Aktuell gibt es keine heutigen oder kommenden Services.
                     </div>
 
                     <div v-else class="overflow-x-auto">
-                        <table class="min-w-full divide-y divide-gray-200">
+                        <table data-testid="service-list-table" class="min-w-full divide-y divide-gray-200">
                             <thead class="bg-gray-50">
                                 <tr>
                                     <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500">Titel</th>
@@ -195,7 +195,7 @@ function stateIconClass(isDone) {
                             </thead>
 
                             <tbody class="divide-y divide-gray-100 bg-white">
-                                <tr v-for="service in services" :key="service.id" class="align-top hover:bg-gray-50/60">
+                                <tr v-for="service in services" :key="service.id" :data-testid="`service-list-row-${service.id}`" class="align-top hover:bg-gray-50/60">
                                     <td class="px-4 py-4">
                                         <div class="font-medium text-gray-900">{{ service.title }}</div>
                                         <div class="mt-1 text-xs text-gray-500">{{ formatDate(service.date) }}</div>
@@ -251,6 +251,7 @@ function stateIconClass(isDone) {
                                         <div class="flex flex-col gap-2">
                                             <template v-if="service.finalized_at">
                                                 <button
+                                                    data-testid="service-list-reopen-button"
                                                     type="button"
                                                     class="inline-flex items-center justify-center rounded-md border border-amber-300 bg-amber-50 px-3 py-1.5 text-xs font-semibold text-amber-800 transition hover:bg-amber-100"
                                                     @click="reopenService(service.id)"
@@ -258,6 +259,7 @@ function stateIconClass(isDone) {
                                                     Wieder öffnen
                                                 </button>
                                                 <button
+                                                    data-testid="service-list-download-button"
                                                     type="button"
                                                     class="inline-flex items-center justify-center rounded-md border border-gray-300 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 transition hover:bg-gray-50"
                                                     @click="downloadService(service.id)"
@@ -268,6 +270,7 @@ function stateIconClass(isDone) {
 
                                             <template v-else>
                                                 <button
+                                                    data-testid="service-list-edit-button"
                                                     type="button"
                                                     class="inline-flex items-center justify-center rounded-md border border-gray-300 bg-white px-3 py-1.5 text-xs font-semibold text-gray-700 transition hover:bg-gray-50"
                                                     @click="router.get(route('services.edit', service.id))"
@@ -275,6 +278,7 @@ function stateIconClass(isDone) {
                                                     Bearbeiten
                                                 </button>
                                                 <button
+                                                    data-testid="service-list-finalize-button"
                                                     type="button"
                                                     class="inline-flex items-center justify-center rounded-md border border-emerald-300 bg-emerald-50 px-3 py-1.5 text-xs font-semibold text-emerald-800 transition hover:bg-emerald-100"
                                                     :disabled="finalizing"
@@ -327,6 +331,7 @@ function stateIconClass(isDone) {
 
                         <div class="mt-5 flex justify-end gap-3">
                             <button
+                                data-testid="service-list-confirm-cancel-button"
                                 type="button"
                                 class="rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-medium text-gray-700 transition hover:bg-gray-50"
                                 @click="cancelFinalize"
@@ -334,6 +339,7 @@ function stateIconClass(isDone) {
                                 Abbrechen
                             </button>
                             <button
+                                data-testid="service-list-confirm-submit-button"
                                 type="button"
                                 class="rounded-md border border-emerald-300 bg-emerald-600 px-4 py-2 text-sm font-semibold text-white transition hover:bg-emerald-700"
                                 @click="confirmFinalize"
diff --git a/resources/js/Pages/Songs/Index.vue b/resources/js/Pages/Songs/Index.vue
index bb5c3dc..988d3bc 100644
--- a/resources/js/Pages/Songs/Index.vue
+++ b/resources/js/Pages/Songs/Index.vue
@@ -193,6 +193,7 @@ function pageRange() {
 
                 <!-- Upload Area -->
                 <div
+                    data-testid="song-list-upload-area"
                     class="group relative mb-6 cursor-pointer overflow-hidden rounded-xl border-2 border-dashed transition-all duration-300"
                     :class="isDragging
                         ? 'border-amber-400 bg-amber-50/80 shadow-lg shadow-amber-100/50'
@@ -203,6 +204,7 @@ function pageRange() {
                     @click="triggerFileInput"
                 >
                     <input
+                        data-testid="song-list-file-input"
                         ref="fileInput"
                         type="file"
                         multiple
@@ -257,6 +259,7 @@ function pageRange() {
                         </svg>
                     </div>
                     <input
+                        data-testid="song-list-search-input"
                         v-model="search"
                         type="text"
                         placeholder="Songs durchsuchen (Name oder CCLI-ID)…"
@@ -271,6 +274,7 @@ function pageRange() {
                         leave-to-class="opacity-0"
                     >
                         <button
+                            data-testid="song-list-search-clear"
                             v-if="search"
                             @click="search = ''"
                             class="absolute inset-y-0 right-0 flex items-center pr-4 text-gray-400 hover:text-gray-600"
@@ -394,6 +398,7 @@ function pageRange() {
                                         <div class="flex items-center justify-end gap-1.5 opacity-0 transition-opacity group-hover:opacity-100">
                                             <!-- Bearbeiten -->
                                             <button
+                                                data-testid="song-list-edit-button"
                                                 type="button"
                                                 class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-2.5 py-1.5 text-xs font-medium text-gray-700 shadow-sm transition-all hover:border-amber-300 hover:bg-amber-50 hover:text-amber-700"
                                                 title="Bearbeiten"
@@ -407,6 +412,7 @@ function pageRange() {
 
                                             <!-- Übersetzen -->
                                             <a
+                                                data-testid="song-list-translate-link"
                                                 :href="`/songs/${song.id}/translate`"
                                                 class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-2.5 py-1.5 text-xs font-medium text-gray-700 shadow-sm transition-all hover:border-sky-300 hover:bg-sky-50 hover:text-sky-700"
                                                 title="Übersetzen"
@@ -419,6 +425,7 @@ function pageRange() {
 
                                             <!-- Herunterladen -->
                                             <button
+                                                data-testid="song-list-download-button"
                                                 type="button"
                                                 class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-2.5 py-1.5 text-xs font-medium text-gray-700 shadow-sm transition-all hover:border-emerald-300 hover:bg-emerald-50 hover:text-emerald-700"
                                                 title="Als .pro herunterladen"
@@ -432,6 +439,7 @@ function pageRange() {
 
                                             <!-- Löschen -->
                                             <button
+                                                data-testid="song-list-delete-button"
                                                 type="button"
                                                 class="inline-flex items-center rounded-lg border border-gray-200 bg-white px-2.5 py-1.5 text-xs font-medium text-gray-700 shadow-sm transition-all hover:border-red-300 hover:bg-red-50 hover:text-red-700"
                                                 title="Löschen"
@@ -461,6 +469,7 @@ function pageRange() {
 
                     <nav class="flex items-center gap-1">
                         <button
+                            data-testid="song-list-pagination-prev"
                             :disabled="meta.current_page <= 1"
                             class="inline-flex h-8 w-8 items-center justify-center rounded-lg border border-gray-200 bg-white text-xs text-gray-600 shadow-sm transition-all hover:bg-gray-50 disabled:cursor-not-allowed disabled:opacity-40"
                             @click="goToPage(meta.current_page - 1)"
@@ -488,6 +497,7 @@ function pageRange() {
                         </template>
 
                         <button
+                            data-testid="song-list-pagination-next"
                             :disabled="meta.current_page >= meta.last_page"
                             class="inline-flex h-8 w-8 items-center justify-center rounded-lg border border-gray-200 bg-white text-xs text-gray-600 shadow-sm transition-all hover:bg-gray-50 disabled:cursor-not-allowed disabled:opacity-40"
                             @click="goToPage(meta.current_page + 1)"
@@ -539,6 +549,7 @@ function pageRange() {
 
                                     <div class="mt-5 flex items-center justify-end gap-2.5">
                                         <button
+                                            data-testid="song-list-delete-cancel-button"
                                             type="button"
                                             class="rounded-lg border border-gray-200 bg-white px-4 py-2 text-sm font-medium text-gray-700 shadow-sm transition hover:bg-gray-50"
                                             @click="cancelDelete"
@@ -546,6 +557,7 @@ function pageRange() {
                                             Abbrechen
                                         </button>
                                         <button
+                                            data-testid="song-list-delete-confirm-button"
                                             type="button"
                                             class="inline-flex items-center gap-1.5 rounded-lg border border-red-300 bg-red-600 px-4 py-2 text-sm font-medium text-white shadow-sm transition hover:bg-red-700 disabled:opacity-60"
                                             :disabled="deleting"
@@ -565,6 +577,7 @@ function pageRange() {
 
         <!-- Song Edit Modal -->
         <SongEditModal
+            data-testid="song-list-edit-modal"
             :show="showEditModal"
             :song-id="editSongId"
             @close="closeEditModal"
diff --git a/resources/js/Pages/Songs/Translate.vue b/resources/js/Pages/Songs/Translate.vue
index 5cb6bb2..66b0472 100644
--- a/resources/js/Pages/Songs/Translate.vue
+++ b/resources/js/Pages/Songs/Translate.vue
@@ -161,6 +161,7 @@ function rowsForSlide(slide) {
                 </div>
 
                 <button
+                    data-testid="translate-back-button"
                     type="button"
                     class="inline-flex items-center rounded-lg border border-gray-300 bg-white px-3.5 py-2 text-sm font-medium text-gray-700 transition hover:bg-gray-50"
                     @click="router.visit('/songs')"
@@ -180,12 +181,14 @@ function rowsForSlide(slide) {
 
                     <div class="mt-4 grid gap-3 md:grid-cols-[1fr,auto]">
                         <input
+                            data-testid="translate-url-input"
                             v-model="sourceUrl"
                             type="url"
                             placeholder="https://beispiel.de/lyrics"
                             class="block w-full rounded-md border-gray-300 text-sm shadow-sm focus:border-emerald-500 focus:ring-emerald-500"
                         >
                         <button
+                            data-testid="translate-fetch-button"
                             type="button"
                             class="inline-flex items-center justify-center rounded-md bg-emerald-600 px-4 py-2 text-sm font-semibold text-white shadow transition hover:bg-emerald-700 disabled:cursor-not-allowed disabled:opacity-60"
                             :disabled="isFetching"
@@ -200,6 +203,7 @@ function rowsForSlide(slide) {
                             Text manuell einfuegen
                         </label>
                         <textarea
+                            data-testid="translate-source-textarea"
                             v-model="sourceText"
                             rows="10"
                             class="block w-full rounded-md border-gray-300 text-sm shadow-sm focus:border-emerald-500 focus:ring-emerald-500"
@@ -207,6 +211,7 @@ function rowsForSlide(slide) {
                         />
                         <div class="mt-3 flex justify-end">
                             <button
+                                data-testid="translate-apply-button"
                                 type="button"
                                 class="inline-flex items-center rounded-md border border-gray-300 bg-white px-4 py-2 text-sm font-semibold text-gray-700 transition hover:bg-gray-50"
                                 @click="applyManualText"
@@ -244,6 +249,7 @@ function rowsForSlide(slide) {
                         </div>
 
                         <button
+                            data-testid="translate-save-button"
                             type="button"
                             class="inline-flex items-center rounded-md bg-emerald-600 px-4 py-2 text-sm font-semibold text-white shadow transition hover:bg-emerald-700 disabled:cursor-not-allowed disabled:opacity-60"
                             :disabled="isSaving"
@@ -292,6 +298,7 @@ function rowsForSlide(slide) {
                                                 Original
                                             </label>
                                             <textarea
+                                                data-testid="translate-original-textarea"
                                                 :value="slide.text_content"
                                                 :rows="rowsForSlide(slide)"
                                                 readonly
@@ -304,6 +311,7 @@ function rowsForSlide(slide) {
                                                 Uebersetzung
                                             </label>
                                             <textarea
+                                                data-testid="translate-translation-textarea"
                                                 :value="slide.translated_text"
                                                 :rows="rowsForSlide(slide)"
                                                 class="block w-full rounded-md border-gray-300 text-sm shadow-sm focus:border-emerald-500 focus:ring-emerald-500"