diff --git a/frontend/src/components/shared/config/configSections/AdminAdvancedSection.tsx b/frontend/src/components/shared/config/configSections/AdminAdvancedSection.tsx
index c1382afc2..45963582e 100644
--- a/frontend/src/components/shared/config/configSections/AdminAdvancedSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminAdvancedSection.tsx
@@ -172,7 +172,7 @@ export default function AdminAdvancedSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminConnectionsSection.tsx b/frontend/src/components/shared/config/configSections/AdminConnectionsSection.tsx
index 5bd92c978..89addd101 100644
--- a/frontend/src/components/shared/config/configSections/AdminConnectionsSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminConnectionsSection.tsx
@@ -9,9 +9,6 @@ import PendingBadge from '../PendingBadge';
 import ProviderCard from './ProviderCard';
 import {
   ALL_PROVIDERS,
-  OAUTH2_PROVIDERS,
-  GENERIC_OAUTH2_PROVIDER,
-  SAML2_PROVIDER,
   Provider,
 } from './providerDefinitions';
 import apiClient from '../../../../services/apiClient';
@@ -98,7 +95,7 @@ export default function AdminConnectionsSection() {
 
       return result;
     },
-    saveTransformer: (settings) => {
+    saveTransformer: () => {
       // This section doesn't have a global save button
       // Individual providers save through their own handlers
       return {
@@ -210,7 +207,7 @@ export default function AdminConnectionsSection() {
           throw new Error('Failed to save');
         }
       }
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
@@ -264,7 +261,7 @@ export default function AdminConnectionsSection() {
           throw new Error('Failed to disconnect');
         }
       }
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
@@ -299,7 +296,7 @@ export default function AdminConnectionsSection() {
       } else {
         throw new Error('Failed to save');
       }
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminDatabaseSection.tsx b/frontend/src/components/shared/config/configSections/AdminDatabaseSection.tsx
index b724bbb03..a8f742fe2 100644
--- a/frontend/src/components/shared/config/configSections/AdminDatabaseSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminDatabaseSection.tsx
@@ -85,7 +85,7 @@ export default function AdminDatabaseSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminEndpointsSection.tsx b/frontend/src/components/shared/config/configSections/AdminEndpointsSection.tsx
index 7dc921ebc..b29b97fce 100644
--- a/frontend/src/components/shared/config/configSections/AdminEndpointsSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminEndpointsSection.tsx
@@ -36,7 +36,7 @@ export default function AdminEndpointsSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminFeaturesSection.tsx b/frontend/src/components/shared/config/configSections/AdminFeaturesSection.tsx
index 7506c60ec..7f6170529 100644
--- a/frontend/src/components/shared/config/configSections/AdminFeaturesSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminFeaturesSection.tsx
@@ -76,7 +76,7 @@ export default function AdminFeaturesSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminGeneralSection.tsx b/frontend/src/components/shared/config/configSections/AdminGeneralSection.tsx
index bb1458100..4cf0f938f 100644
--- a/frontend/src/components/shared/config/configSections/AdminGeneralSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminGeneralSection.tsx
@@ -145,7 +145,7 @@ export default function AdminGeneralSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminLegalSection.tsx b/frontend/src/components/shared/config/configSections/AdminLegalSection.tsx
index a83a53bb6..ef19c44cc 100644
--- a/frontend/src/components/shared/config/configSections/AdminLegalSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminLegalSection.tsx
@@ -40,7 +40,7 @@ export default function AdminLegalSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminMailSection.tsx b/frontend/src/components/shared/config/configSections/AdminMailSection.tsx
index 0fcf4db52..239202db9 100644
--- a/frontend/src/components/shared/config/configSections/AdminMailSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminMailSection.tsx
@@ -40,7 +40,7 @@ export default function AdminMailSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminPremiumSection.tsx b/frontend/src/components/shared/config/configSections/AdminPremiumSection.tsx
index d3840bd63..69a77a8f3 100644
--- a/frontend/src/components/shared/config/configSections/AdminPremiumSection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminPremiumSection.tsx
@@ -37,7 +37,7 @@ export default function AdminPremiumSection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminPrivacySection.tsx b/frontend/src/components/shared/config/configSections/AdminPrivacySection.tsx
index 8f410d4a0..fccc12605 100644
--- a/frontend/src/components/shared/config/configSections/AdminPrivacySection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminPrivacySection.tsx
@@ -83,7 +83,7 @@ export default function AdminPrivacySection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/AdminSecuritySection.tsx b/frontend/src/components/shared/config/configSections/AdminSecuritySection.tsx
index 7e9d1e3be..6c489cd0f 100644
--- a/frontend/src/components/shared/config/configSections/AdminSecuritySection.tsx
+++ b/frontend/src/components/shared/config/configSections/AdminSecuritySection.tsx
@@ -1,6 +1,6 @@
 import { useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
-import { TextInput, NumberInput, Switch, Button, Stack, Paper, Text, Loader, Group, Select, PasswordInput, Alert, Badge, Accordion, Textarea } from '@mantine/core';
+import { NumberInput, Switch, Button, Stack, Paper, Text, Loader, Group, Select, Alert, Badge, Accordion, Textarea } from '@mantine/core';
 import { alert } from '../../../toast';
 import LocalIcon from '../../LocalIcon';
 import RestartConfirmationModal from '../RestartConfirmationModal';
@@ -147,7 +147,7 @@ export default function AdminSecuritySection() {
     try {
       await saveSettings();
       showRestartModal();
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/components/shared/config/configSections/Overview.tsx b/frontend/src/components/shared/config/configSections/Overview.tsx
index 8d04ac430..762fb6eaa 100644
--- a/frontend/src/components/shared/config/configSections/Overview.tsx
+++ b/frontend/src/components/shared/config/configSections/Overview.tsx
@@ -61,7 +61,7 @@ const Overview: React.FC = () => {
     try {
       await signOut();
       navigate('/login');
-    } catch (error) {
+    } catch (_error) {
       console.error('Logout error:', error);
     }
   };
diff --git a/frontend/src/components/shared/config/configSections/ProviderCard.tsx b/frontend/src/components/shared/config/configSections/ProviderCard.tsx
index 5ce015613..a44868a6e 100644
--- a/frontend/src/components/shared/config/configSections/ProviderCard.tsx
+++ b/frontend/src/components/shared/config/configSections/ProviderCard.tsx
@@ -1,5 +1,5 @@
 import { useState } from 'react';
-import { Paper, Group, Text, Badge, Button, Collapse, Stack, TextInput, Textarea, Switch, PasswordInput } from '@mantine/core';
+import { Paper, Group, Text, Button, Collapse, Stack, TextInput, Textarea, Switch, PasswordInput } from '@mantine/core';
 import { useTranslation } from 'react-i18next';
 import LocalIcon from '../../LocalIcon';
 import { Provider, ProviderField } from './providerDefinitions';
diff --git a/frontend/src/components/shared/config/useRestartServer.ts b/frontend/src/components/shared/config/useRestartServer.ts
index 21493762d..b204f47ec 100644
--- a/frontend/src/components/shared/config/useRestartServer.ts
+++ b/frontend/src/components/shared/config/useRestartServer.ts
@@ -39,7 +39,7 @@ export function useRestartServer() {
       } else {
         throw new Error('Failed to restart');
       }
-    } catch (error) {
+    } catch (_error) {
       alert({
         alertType: 'error',
         title: t('admin.error', 'Error'),
diff --git a/frontend/src/hooks/useAdminSettings.ts b/frontend/src/hooks/useAdminSettings.ts
index 875311f51..d7321c1b3 100644
--- a/frontend/src/hooks/useAdminSettings.ts
+++ b/frontend/src/hooks/useAdminSettings.ts
@@ -1,6 +1,6 @@
 import { useState } from 'react';
 import apiClient from '../services/apiClient';
-import { mergePendingSettings, isFieldPending, hasPendingChanges, getCurrentValue } from '../utils/settingsPendingHelper';
+import { mergePendingSettings, isFieldPending, hasPendingChanges } from '../utils/settingsPendingHelper';
 
 interface UseAdminSettingsOptions<T> {
   sectionName: string;
@@ -152,7 +152,7 @@ function computeDelta(original: any, current: any): any {
   const delta: any = {};
 
   for (const key in current) {
-    if (!current.hasOwnProperty(key)) continue;
+    if (!Object.prototype.hasOwnProperty.call(current, key)) continue;
 
     const originalValue = original[key];
     const currentValue = current[key];
diff --git a/frontend/src/utils/settingsPendingHelper.ts b/frontend/src/utils/settingsPendingHelper.ts
index 89a4991da..980930fea 100644
--- a/frontend/src/utils/settingsPendingHelper.ts
+++ b/frontend/src/utils/settingsPendingHelper.ts
@@ -120,7 +120,7 @@ function deepMerge(target: any, source: any): any {
   const result = { ...target };
 
   for (const key in source) {
-    if (source.hasOwnProperty(key)) {
+    if (Object.prototype.hasOwnProperty.call(source, key)) {
       const sourceValue = source[key];
       const targetValue = result[key];