diff --git a/frontend/src/views/Holidays.vue b/frontend/src/views/Holidays.vue
index 638e665..1dfc39e 100644
--- a/frontend/src/views/Holidays.vue
+++ b/frontend/src/views/Holidays.vue
@@ -214,7 +214,7 @@ const form = ref({
 // Lade alle Bundesländer
 async function loadStates() {
   try {
-    const response = await fetch('${API_URL}/holidays/states', {
+    const response = await fetch(`${API_URL}/holidays/states`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -235,7 +235,7 @@ async function loadStates() {
 async function loadHolidays() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/holidays', {
+    const response = await fetch(`${API_URL}/holidays`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -278,7 +278,7 @@ async function createHoliday() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/holidays', {
+    const response = await fetch(`${API_URL}/holidays`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Invite.vue b/frontend/src/views/Invite.vue
index 3d6e715..a49f502 100644
--- a/frontend/src/views/Invite.vue
+++ b/frontend/src/views/Invite.vue
@@ -93,7 +93,7 @@ const form = ref({
 // Lade alle Einladungen
 async function loadInvitations() {
   try {
-    const response = await fetch('${API_URL}/invite', {
+    const response = await fetch(`${API_URL}/invite`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -118,7 +118,7 @@ async function sendInvite() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/invite', {
+    const response = await fetch(`${API_URL}/invite`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Login.vue b/frontend/src/views/Login.vue
index 0e12f86..6712693 100644
--- a/frontend/src/views/Login.vue
+++ b/frontend/src/views/Login.vue
@@ -114,7 +114,9 @@
 import { ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '../stores/authStore'
+import { API_BASE_URL } from '@/config/api'
 
+const API_URL = API_BASE_URL
 const router = useRouter()
 const authStore = useAuthStore()
 
@@ -158,7 +160,7 @@ const handleLogin = async () => {
 
 const handleGoogleLogin = () => {
   // Redirect zu Google OAuth
-  window.location.href = '${API_URL}/auth/google'
+  window.location.href = `${API_URL}/auth/google`
 }
 </script>
 
diff --git a/frontend/src/views/PasswordChange.vue b/frontend/src/views/PasswordChange.vue
index 861c862..cc929ca 100644
--- a/frontend/src/views/PasswordChange.vue
+++ b/frontend/src/views/PasswordChange.vue
@@ -94,7 +94,7 @@ async function changePassword() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/password', {
+    const response = await fetch(`${API_URL}/password`, {
       method: 'PUT',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Permissions.vue b/frontend/src/views/Permissions.vue
index 9a101ff..c404575 100644
--- a/frontend/src/views/Permissions.vue
+++ b/frontend/src/views/Permissions.vue
@@ -104,7 +104,7 @@ const form = ref({
 // Lade alle Watcher
 async function loadWatchers() {
   try {
-    const response = await fetch('${API_URL}/watcher', {
+    const response = await fetch(`${API_URL}/watcher`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -130,7 +130,7 @@ async function addWatcher() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/watcher', {
+    const response = await fetch(`${API_URL}/watcher`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Profile.vue b/frontend/src/views/Profile.vue
index 5516fc9..bf20aea 100644
--- a/frontend/src/views/Profile.vue
+++ b/frontend/src/views/Profile.vue
@@ -137,7 +137,7 @@ const form = ref({
 async function loadProfile() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/profile', {
+    const response = await fetch(`${API_URL}/profile`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -167,7 +167,7 @@ async function loadProfile() {
 // Lade Bundesländer
 async function loadStates() {
   try {
-    const response = await fetch('${API_URL}/profile/states', {
+    const response = await fetch(`${API_URL}/profile/states`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -187,7 +187,7 @@ async function loadStates() {
 async function saveProfile() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/profile', {
+    const response = await fetch(`${API_URL}/profile`, {
       method: 'PUT',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Roles.vue b/frontend/src/views/Roles.vue
index cc4c459..9203dde 100644
--- a/frontend/src/views/Roles.vue
+++ b/frontend/src/views/Roles.vue
@@ -84,7 +84,7 @@ const { showModal, modalConfig, alert, confirm, onConfirm, onCancel } = useModal
 async function loadUsers() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/roles/users', {
+    const response = await fetch(`${API_URL}/roles/users`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
diff --git a/frontend/src/views/Sick.vue b/frontend/src/views/Sick.vue
index 8fd606d..62508d4 100644
--- a/frontend/src/views/Sick.vue
+++ b/frontend/src/views/Sick.vue
@@ -125,7 +125,7 @@ const form = ref({
 async function loadSickEntries() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/sick', {
+    const response = await fetch(`${API_URL}/sick`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -147,7 +147,7 @@ async function loadSickEntries() {
 // Lade alle Krankheitstypen
 async function loadSickTypes() {
   try {
-    const response = await fetch('${API_URL}/sick/types', {
+    const response = await fetch(`${API_URL}/sick/types`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -173,7 +173,7 @@ async function createSick() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/sick', {
+    const response = await fetch(`${API_URL}/sick`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Timewish.vue b/frontend/src/views/Timewish.vue
index d8367f5..61cae29 100644
--- a/frontend/src/views/Timewish.vue
+++ b/frontend/src/views/Timewish.vue
@@ -179,7 +179,7 @@ function onWishtypeChange() {
 async function loadTimewishes() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/timewish', {
+    const response = await fetch(`${API_URL}/timewish`, {
       headers: {
         'Authorization': `Bearer ${authStore.token}`
       }
@@ -207,7 +207,7 @@ async function createTimewish() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/timewish', {
+    const response = await fetch(`${API_URL}/timewish`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
diff --git a/frontend/src/views/Vacation.vue b/frontend/src/views/Vacation.vue
index 7c71f3c..bac471c 100644
--- a/frontend/src/views/Vacation.vue
+++ b/frontend/src/views/Vacation.vue
@@ -137,7 +137,7 @@ function onStartDateChange() {
 async function loadVacations() {
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/vacation', {
+    const response = await fetch(`${API_URL}/vacation`, {
       headers: authStore.getAuthHeaders()
     })
     
@@ -161,7 +161,7 @@ async function createVacation() {
   
   try {
     loading.value = true
-    const response = await fetch('${API_URL}/vacation', {
+    const response = await fetch(`${API_URL}/vacation`, {
       method: 'POST',
       headers: {
         ...authStore.getAuthHeaders(),