diff --git a/resources/js/components/transactions/transaction-list.tsx b/resources/js/components/transactions/transaction-list.tsx
index 593566ee..2bc6765d 100644
--- a/resources/js/components/transactions/transaction-list.tsx
+++ b/resources/js/components/transactions/transaction-list.tsx
@@ -146,6 +146,10 @@ function TransactionRowComponent({
 }
 
 function getInitialColumnVisibility(): VisibilityState {
+    if (typeof window === 'undefined') {
+        return { account: false };
+    }
+
     try {
         const stored = localStorage.getItem(COLUMN_VISIBILITY_KEY);
         if (stored) {
diff --git a/resources/js/hooks/use-appearance.tsx b/resources/js/hooks/use-appearance.tsx
index 9679ac98..c4270d92 100644
--- a/resources/js/hooks/use-appearance.tsx
+++ b/resources/js/hooks/use-appearance.tsx
@@ -20,6 +20,8 @@ const setCookie = (name: string, value: string, days = 365) => {
 };
 
 const applyTheme = (appearance: Appearance) => {
+    if (typeof document === 'undefined') return;
+
     const isDark =
         appearance === 'dark' || (appearance === 'system' && prefersDark());
 
@@ -36,11 +38,15 @@ const mediaQuery = () => {
 };
 
 const handleSystemThemeChange = () => {
+    if (typeof window === 'undefined') return;
+
     const currentAppearance = localStorage.getItem('appearance') as Appearance;
     applyTheme(currentAppearance || 'system');
 };
 
 export function initializeTheme() {
+    if (typeof window === 'undefined') return;
+
     const savedAppearance =
         (localStorage.getItem('appearance') as Appearance) || 'system';
 
diff --git a/resources/js/lib/balance-import-config-storage.ts b/resources/js/lib/balance-import-config-storage.ts
index 0e3ec2b4..4c386f99 100644
--- a/resources/js/lib/balance-import-config-storage.ts
+++ b/resources/js/lib/balance-import-config-storage.ts
@@ -13,6 +13,8 @@ export function saveBalanceImportConfig(
     accountId: UUID,
     config: BalanceImportConfig,
 ): void {
+    if (typeof window === 'undefined') return;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         localStorage.setItem(key, JSON.stringify(config));
@@ -24,6 +26,8 @@ export function saveBalanceImportConfig(
 export function loadBalanceImportConfig(
     accountId: UUID,
 ): BalanceImportConfig | null {
+    if (typeof window === 'undefined') return null;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         const stored = localStorage.getItem(key);
@@ -46,6 +50,8 @@ export function loadBalanceImportConfig(
 }
 
 export function clearBalanceImportConfig(accountId: UUID): void {
+    if (typeof window === 'undefined') return;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         localStorage.removeItem(key);
diff --git a/resources/js/lib/import-config-storage.ts b/resources/js/lib/import-config-storage.ts
index b68b2f3c..52dfe1d6 100644
--- a/resources/js/lib/import-config-storage.ts
+++ b/resources/js/lib/import-config-storage.ts
@@ -11,6 +11,8 @@ export function saveImportConfig(
     accountId: number,
     config: ImportConfig,
 ): void {
+    if (typeof window === 'undefined') return;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         localStorage.setItem(key, JSON.stringify(config));
@@ -20,6 +22,8 @@ export function saveImportConfig(
 }
 
 export function loadImportConfig(accountId: number): ImportConfig | null {
+    if (typeof window === 'undefined') return null;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         const stored = localStorage.getItem(key);
@@ -42,6 +46,8 @@ export function loadImportConfig(accountId: number): ImportConfig | null {
 }
 
 export function clearImportConfig(accountId: number): void {
+    if (typeof window === 'undefined') return;
+
     try {
         const key = `${STORAGE_KEY_PREFIX}${accountId}`;
         localStorage.removeItem(key);
diff --git a/resources/js/pages/transactions/index.tsx b/resources/js/pages/transactions/index.tsx
index e1db15d7..3aea133a 100644
--- a/resources/js/pages/transactions/index.tsx
+++ b/resources/js/pages/transactions/index.tsx
@@ -157,6 +157,10 @@ function TransactionRowComponent({
 }
 
 function getInitialColumnVisibility(): VisibilityState {
+    if (typeof window === 'undefined') {
+        return { account: false };
+    }
+
     try {
         const stored = localStorage.getItem(COLUMN_VISIBILITY_KEY);
         if (stored) {