feat: Add persistent session authentication with configurable duration

- Implement persistent session authentication with httpOnly cookies
- Add configurable session duration (1-365 days) in settings
- Add session expiration display in settings modal
- Add logout button next to theme toggle
- Enhance token verification to return expiration time
- Add retry logic for failed auth checks
- Add comprehensive authentication documentation to help modal
- Improve session restoration on page load

src/app/_components/AuthProvider.tsx

@@ -1,11 +1,12 @@
 'use client';
 
-import { createContext, useContext, useEffect, useState, type ReactNode } from 'react';
+import { createContext, useContext, useEffect, useState, useCallback, type ReactNode } from 'react';
 
 interface AuthContextType {
   isAuthenticated: boolean;
   username: string | null;
   isLoading: boolean;
+  expirationTime: number | null;
   login: (username: string, password: string) => Promise<boolean>;
   logout: () => void;
   checkAuth: () => Promise<void>;
@@ -21,8 +22,9 @@ export function AuthProvider({ children }: AuthProviderProps) {
   const [isAuthenticated, setIsAuthenticated] = useState(false);
   const [username, setUsername] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(true);
+  const [expirationTime, setExpirationTime] = useState<number | null>(null);
 
-  const checkAuth = async () => {
+  const checkAuthInternal = async (retryCount = 0) => {
     try {
       // First check if setup is completed
       const setupResponse = await fetch('/api/settings/auth-credentials');
@@ -33,30 +35,60 @@ export function AuthProvider({ children }: AuthProviderProps) {
         if (!setupData.setupCompleted || !setupData.enabled) {
           setIsAuthenticated(false);
           setUsername(null);
+          setExpirationTime(null);
           setIsLoading(false);
           return;
         }
       }
 
       // Only verify authentication if setup is completed and auth is enabled
-      const response = await fetch('/api/auth/verify');
+      const response = await fetch('/api/auth/verify', {
+        credentials: 'include', // Ensure cookies are sent
+      });
       if (response.ok) {
-        const data = await response.json() as { username: string };
+        const data = await response.json() as { 
+          username: string; 
+          expirationTime?: number | null;
+          timeUntilExpiration?: number | null;
+        };
         setIsAuthenticated(true);
         setUsername(data.username);
+        setExpirationTime(data.expirationTime ?? null);
       } else {
         setIsAuthenticated(false);
         setUsername(null);
+        setExpirationTime(null);
+        
+        // Retry logic for failed auth checks (max 2 retries)
+        if (retryCount < 2) {
+          setTimeout(() => {
+            void checkAuthInternal(retryCount + 1);
+          }, 500);
+          return;
+        }
       }
     } catch (error) {
       console.error('Error checking auth:', error);
       setIsAuthenticated(false);
       setUsername(null);
+      setExpirationTime(null);
+      
+      // Retry logic for network errors (max 2 retries)
+      if (retryCount < 2) {
+        setTimeout(() => {
+          void checkAuthInternal(retryCount + 1);
+        }, 500);
+        return;
+      }
     } finally {
       setIsLoading(false);
     }
   };
 
+  const checkAuth = useCallback(() => {
+    return checkAuthInternal(0);
+  }, []);
+
   const login = async (username: string, password: string): Promise<boolean> => {
     try {
       const response = await fetch('/api/auth/login', {
@@ -65,12 +97,16 @@ export function AuthProvider({ children }: AuthProviderProps) {
           'Content-Type': 'application/json',
         },
         body: JSON.stringify({ username, password }),
+        credentials: 'include', // Ensure cookies are received
       });
 
       if (response.ok) {
         const data = await response.json() as { username: string };
         setIsAuthenticated(true);
         setUsername(data.username);
+        
+        // Check auth again to get expiration time
+        await checkAuth();
         return true;
       } else {
         const errorData = await response.json();
@@ -88,11 +124,12 @@ export function AuthProvider({ children }: AuthProviderProps) {
     document.cookie = 'auth-token=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/;';
     setIsAuthenticated(false);
     setUsername(null);
+    setExpirationTime(null);
   };
 
   useEffect(() => {
     void checkAuth();
-  }, []);
+  }, [checkAuth]);
 
   return (
     <AuthContext.Provider
@@ -100,6 +137,7 @@ export function AuthProvider({ children }: AuthProviderProps) {
         isAuthenticated,
         username,
         isLoading,
+        expirationTime,
         login,
         logout,
         checkAuth,

src/app/_components/GeneralSettingsModal.tsx

@@ -8,6 +8,7 @@ import { ContextualHelpIcon } from './ContextualHelpIcon';
 import { useTheme } from './ThemeProvider';
 import { useRegisterModal } from './modal/ModalStackProvider';
 import { api } from '~/trpc/react';
+import { useAuth } from './AuthProvider';
 
 interface GeneralSettingsModalProps {
   isOpen: boolean;
@@ -17,7 +18,9 @@ interface GeneralSettingsModalProps {
 export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalProps) {
   useRegisterModal(isOpen, { id: 'general-settings-modal', allowEscape: true, onClose });
   const { theme, setTheme } = useTheme();
+  const { isAuthenticated, expirationTime, checkAuth } = useAuth();
   const [activeTab, setActiveTab] = useState<'general' | 'github' | 'auth' | 'auto-sync'>('general');
+  const [sessionExpirationDisplay, setSessionExpirationDisplay] = useState<string>('');
   const [githubToken, setGithubToken] = useState('');
   const [saveFilter, setSaveFilter] = useState(false);
   const [savedFilters, setSavedFilters] = useState<any>(null);
@@ -34,6 +37,7 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
   const [authHasCredentials, setAuthHasCredentials] = useState(false);
   const [authSetupCompleted, setAuthSetupCompleted] = useState(false);
   const [authLoading, setAuthLoading] = useState(false);
+  const [sessionDurationDays, setSessionDurationDays] = useState(7);
 
   // Auto-sync state
   const [autoSyncEnabled, setAutoSyncEnabled] = useState(false);
@@ -214,11 +218,12 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
     try {
       const response = await fetch('/api/settings/auth-credentials');
       if (response.ok) {
-        const data = await response.json() as { username: string; enabled: boolean; hasCredentials: boolean; setupCompleted: boolean };
+        const data = await response.json() as { username: string; enabled: boolean; hasCredentials: boolean; setupCompleted: boolean; sessionDurationDays?: number };
         setAuthUsername(data.username ?? '');
         setAuthEnabled(data.enabled ?? false);
         setAuthHasCredentials(data.hasCredentials ?? false);
         setAuthSetupCompleted(data.setupCompleted ?? false);
+        setSessionDurationDays(data.sessionDurationDays ?? 7);
       }
     } catch (error) {
       console.error('Error loading auth credentials:', error);
@@ -227,6 +232,64 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
     }
   };
 
+  // Format expiration time display
+  const formatExpirationTime = (expTime: number | null): string => {
+    if (!expTime) return 'No active session';
+    
+    const now = Date.now();
+    const timeUntilExpiration = expTime - now;
+    
+    if (timeUntilExpiration <= 0) {
+      return 'Session expired';
+    }
+    
+    const days = Math.floor(timeUntilExpiration / (1000 * 60 * 60 * 24));
+    const hours = Math.floor((timeUntilExpiration % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
+    const minutes = Math.floor((timeUntilExpiration % (1000 * 60 * 60)) / (1000 * 60));
+    
+    const parts: string[] = [];
+    if (days > 0) {
+      parts.push(`${days} ${days === 1 ? 'day' : 'days'}`);
+    }
+    if (hours > 0) {
+      parts.push(`${hours} ${hours === 1 ? 'hour' : 'hours'}`);
+    }
+    if (minutes > 0 && days === 0) {
+      parts.push(`${minutes} ${minutes === 1 ? 'minute' : 'minutes'}`);
+    }
+    
+    if (parts.length === 0) {
+      return 'Less than a minute';
+    }
+    
+    return parts.join(', ');
+  };
+
+  // Update expiration display periodically
+  useEffect(() => {
+    const updateExpirationDisplay = () => {
+      if (expirationTime) {
+        setSessionExpirationDisplay(formatExpirationTime(expirationTime));
+      } else {
+        setSessionExpirationDisplay('');
+      }
+    };
+
+    updateExpirationDisplay();
+    
+    // Update every minute
+    const interval = setInterval(updateExpirationDisplay, 60000);
+    
+    return () => clearInterval(interval);
+  }, [expirationTime]);
+
+  // Refresh auth when tab changes to auth tab
+  useEffect(() => {
+    if (activeTab === 'auth' && isOpen) {
+      void checkAuth();
+    }
+  }, [activeTab, isOpen, checkAuth]);
+
   const saveAuthCredentials = async () => {
     if (authPassword !== authConfirmPassword) {
       setMessage({ type: 'error', text: 'Passwords do not match' });
@@ -265,6 +328,41 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
     }
   };
 
+  const saveSessionDuration = async (days: number) => {
+    if (days < 1 || days > 365) {
+      setMessage({ type: 'error', text: 'Session duration must be between 1 and 365 days' });
+      return;
+    }
+
+    setAuthLoading(true);
+    setMessage(null);
+    
+    try {
+      const response = await fetch('/api/settings/auth-credentials', {
+        method: 'PATCH',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({ sessionDurationDays: days }),
+      });
+
+      if (response.ok) {
+        setMessage({ type: 'success', text: `Session duration updated to ${days} days` });
+        setSessionDurationDays(days);
+        setTimeout(() => setMessage(null), 3000);
+      } else {
+        const errorData = await response.json();
+        setMessage({ type: 'error', text: errorData.error ?? 'Failed to update session duration' });
+        setTimeout(() => setMessage(null), 3000);
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Failed to update session duration' });
+      setTimeout(() => setMessage(null), 3000);
+    } finally {
+      setAuthLoading(false);
+    }
+  };
+
   const toggleAuthEnabled = async (enabled: boolean) => {
     setAuthLoading(true);
     setMessage(null);
@@ -662,7 +760,10 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
           {activeTab === 'auth' && (
             <div className="space-y-4 sm:space-y-6">
               <div>
-                <h3 className="text-base sm:text-lg font-medium text-foreground mb-3 sm:mb-4">Authentication Settings</h3>
+                <div className="flex items-center gap-2 mb-3 sm:mb-4">
+                  <h3 className="text-base sm:text-lg font-medium text-foreground">Authentication Settings</h3>
+                  <ContextualHelpIcon section="auth-settings" tooltip="Help with Authentication Settings" />
+                </div>
                 <p className="text-sm sm:text-base text-muted-foreground mb-4">
                   Configure authentication to secure access to your application.
                 </p>
@@ -699,6 +800,68 @@ export function GeneralSettingsModal({ isOpen, onClose }: GeneralSettingsModalPr
                     </div>
                   </div>
 
+                  {isAuthenticated && expirationTime && (
+                    <div className="p-4 border border-border rounded-lg">
+                      <h4 className="font-medium text-foreground mb-2">Session Information</h4>
+                      <div className="space-y-2">
+                        <div>
+                          <p className="text-sm text-muted-foreground">Session expires in:</p>
+                          <p className="text-sm font-medium text-foreground">{sessionExpirationDisplay}</p>
+                        </div>
+                        <div>
+                          <p className="text-sm text-muted-foreground">Expiration date:</p>
+                          <p className="text-sm font-medium text-foreground">
+                            {new Date(expirationTime).toLocaleString()}
+                          </p>
+                        </div>
+                      </div>
+                    </div>
+                  )}
+
+                  <div className="p-4 border border-border rounded-lg">
+                    <h4 className="font-medium text-foreground mb-2">Session Duration</h4>
+                    <p className="text-sm text-muted-foreground mb-4">
+                      Configure how long user sessions should last before requiring re-authentication.
+                    </p>
+                    
+                    <div className="space-y-3">
+                      <div>
+                        <label htmlFor="session-duration" className="block text-sm font-medium text-foreground mb-1">
+                          Session Duration (days)
+                        </label>
+                        <div className="flex items-center gap-3">
+                          <Input
+                            id="session-duration"
+                            type="number"
+                            min="1"
+                            max="365"
+                            placeholder="Enter days"
+                            value={sessionDurationDays}
+                            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                              const value = parseInt(e.target.value, 10);
+                              if (!isNaN(value)) {
+                                setSessionDurationDays(value);
+                              }
+                            }}
+                            disabled={authLoading || !authSetupCompleted}
+                            className="w-32"
+                          />
+                          <span className="text-sm text-muted-foreground">days (1-365)</span>
+                          <Button
+                            onClick={() => saveSessionDuration(sessionDurationDays)}
+                            disabled={authLoading || !authSetupCompleted}
+                            size="sm"
+                          >
+                            Save
+                          </Button>
+                        </div>
+                        <p className="text-xs text-muted-foreground mt-2">
+                          Note: This setting applies to new logins. Current sessions will not be affected.
+                        </p>
+                      </div>
+                    </div>
+                  </div>
+
                   <div className="p-4 border border-border rounded-lg">
                     <h4 className="font-medium text-foreground mb-2">Update Credentials</h4>
                     <p className="text-sm text-muted-foreground mb-4">

src/app/_components/HelpModal.tsx

@@ -2,7 +2,7 @@
 
 import { useState } from 'react';
 import { Button } from './ui/button';
-import { HelpCircle, Server, Settings, RefreshCw, Clock, Package, HardDrive, FolderOpen, Search, Download } from 'lucide-react';
+import { HelpCircle, Server, Settings, RefreshCw, Clock, Package, HardDrive, FolderOpen, Search, Download, Lock } from 'lucide-react';
 import { useRegisterModal } from './modal/ModalStackProvider';
 
 interface HelpModalProps {
@@ -11,7 +11,7 @@ interface HelpModalProps {
   initialSection?: string;
 }
 
-type HelpSection = 'server-settings' | 'general-settings' | 'sync-button' | 'auto-sync' | 'available-scripts' | 'downloaded-scripts' | 'installed-scripts' | 'lxc-settings' | 'update-system';
+type HelpSection = 'server-settings' | 'general-settings' | 'auth-settings' | 'sync-button' | 'auto-sync' | 'available-scripts' | 'downloaded-scripts' | 'installed-scripts' | 'lxc-settings' | 'update-system';
 
 export function HelpModal({ isOpen, onClose, initialSection = 'server-settings' }: HelpModalProps) {
   useRegisterModal(isOpen, { id: 'help-modal', allowEscape: true, onClose });
@@ -22,6 +22,7 @@ export function HelpModal({ isOpen, onClose, initialSection = 'server-settings'
   const sections = [
     { id: 'server-settings' as HelpSection, label: 'Server Settings', icon: Server },
     { id: 'general-settings' as HelpSection, label: 'General Settings', icon: Settings },
+    { id: 'auth-settings' as HelpSection, label: 'Authentication Settings', icon: Lock },
     { id: 'sync-button' as HelpSection, label: 'Sync Button', icon: RefreshCw },
     { id: 'auto-sync' as HelpSection, label: 'Auto-Sync', icon: Clock },
     { id: 'available-scripts' as HelpSection, label: 'Available Scripts', icon: Package },
@@ -126,16 +127,113 @@ export function HelpModal({ isOpen, onClose, initialSection = 'server-settings'
                   <li>• Token is stored securely and only used for API calls</li>
                 </ul>
               </div>
+            </div>
+          </div>
+        );
 
+      case 'auth-settings':
+        return (
+          <div className="space-y-6">
+            <div>
+              <h3 className="text-xl font-semibold text-foreground mb-4">Authentication Settings</h3>
+              <p className="text-muted-foreground mb-6">
+                Secure your application with username and password authentication and configure session management.
+              </p>
+            </div>
+
+            <div className="space-y-4">
               <div className="p-4 border border-border rounded-lg">
-                <h4 className="font-medium text-foreground mb-2">Authentication</h4>
+                <h4 className="font-medium text-foreground mb-2">Overview</h4>
                 <p className="text-sm text-muted-foreground mb-2">
-                  Secure your application with username and password authentication.
+                  Authentication settings allow you to secure access to your application with username and password protection. 
+                  Sessions persist across page refreshes, so users don&apos;t need to log in repeatedly.
                 </p>
                 <ul className="text-sm text-muted-foreground space-y-1">
                   <li>• Set up username and password for app access</li>
                   <li>• Enable/disable authentication as needed</li>
-                  <li>• Credentials are stored securely</li>
+                  <li>• Credentials are stored securely using bcrypt hashing</li>
+                  <li>• Sessions use secure httpOnly cookies</li>
+                </ul>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg">
+                <h4 className="font-medium text-foreground mb-2">Setting Up Authentication</h4>
+                <ol className="text-sm text-muted-foreground space-y-2 list-decimal list-inside">
+                  <li>Navigate to General Settings → Authentication tab</li>
+                  <li>Enter a username (minimum 3 characters)</li>
+                  <li>Enter a password (minimum 6 characters)</li>
+                  <li>Confirm your password</li>
+                  <li>Click &quot;Save Credentials&quot; to save your authentication settings</li>
+                  <li>Toggle &quot;Enable Authentication&quot; to activate authentication</li>
+                </ol>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg">
+                <h4 className="font-medium text-foreground mb-2">Session Duration</h4>
+                <p className="text-sm text-muted-foreground mb-2">
+                  Configure how long user sessions should last before requiring re-authentication.
+                </p>
+                <ul className="text-sm text-muted-foreground space-y-2">
+                  <li>• <strong>Configurable Duration:</strong> Set session duration from 1 to 365 days</li>
+                  <li>• <strong>Default Duration:</strong> Sessions default to 7 days if not configured</li>
+                  <li>• <strong>Session Persistence:</strong> Sessions persist across page refreshes and browser restarts</li>
+                  <li>• <strong>New Logins Only:</strong> Duration changes apply to new logins, not existing sessions</li>
+                </ul>
+                <div className="mt-3 p-3 bg-info/10 rounded-md">
+                  <h5 className="font-medium text-info-foreground mb-2">How to Configure:</h5>
+                  <ol className="text-xs text-info/80 space-y-1 list-decimal list-inside">
+                    <li>Go to General Settings → Authentication tab</li>
+                    <li>Find the &quot;Session Duration&quot; section</li>
+                    <li>Enter the number of days (1-365)</li>
+                    <li>Click &quot;Save&quot; to apply the setting</li>
+                  </ol>
+                </div>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg">
+                <h4 className="font-medium text-foreground mb-2">Session Information</h4>
+                <p className="text-sm text-muted-foreground mb-2">
+                  When authenticated, you can view your current session information in the Authentication tab.
+                </p>
+                <ul className="text-sm text-muted-foreground space-y-1">
+                  <li>• <strong>Time Until Expiration:</strong> See how much time remains before your session expires</li>
+                  <li>• <strong>Expiration Date:</strong> View the exact date and time your session will expire</li>
+                  <li>• <strong>Auto-Update:</strong> The expiration display updates every minute</li>
+                </ul>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg">
+                <h4 className="font-medium text-foreground mb-2">Updating Credentials</h4>
+                <p className="text-sm text-muted-foreground mb-2">
+                  You can change your username and password at any time from the Authentication tab.
+                </p>
+                <ul className="text-sm text-muted-foreground space-y-1">
+                  <li>• Update username without changing password (leave password fields empty)</li>
+                  <li>• Change password by entering a new password and confirmation</li>
+                  <li>• Both username and password can be updated together</li>
+                  <li>• Changes take effect immediately after saving</li>
+                </ul>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg bg-muted/50">
+                <h4 className="font-medium text-foreground mb-2">Security Features</h4>
+                <ul className="text-sm text-muted-foreground space-y-2">
+                  <li>• <strong>Password Hashing:</strong> Passwords are hashed using bcrypt before storage</li>
+                  <li>• <strong>Secure Cookies:</strong> Authentication tokens stored in httpOnly cookies</li>
+                  <li>• <strong>HTTPS in Production:</strong> Cookies are secure (HTTPS-only) in production mode</li>
+                  <li>• <strong>SameSite Protection:</strong> Cookies use strict SameSite policy to prevent CSRF attacks</li>
+                  <li>• <strong>JWT Tokens:</strong> Sessions use JSON Web Tokens with expiration</li>
+                </ul>
+              </div>
+
+              <div className="p-4 border border-border rounded-lg bg-warning/10 border-warning/20">
+                <h4 className="font-medium text-warning-foreground mb-2">⚠️ Important Notes</h4>
+                <ul className="text-sm text-warning/80 space-y-2">
+                  <li>• <strong>First-Time Setup:</strong> You must complete the initial setup before enabling authentication</li>
+                  <li>• <strong>Session Duration:</strong> Changes to session duration only affect new logins</li>
+                  <li>• <strong>Logout:</strong> You can log out manually, which immediately invalidates your session</li>
+                  <li>• <strong>Lost Credentials:</strong> If you forget your password, you&apos;ll need to reset it manually in the .env file</li>
+                  <li>• <strong>Disabling Auth:</strong> Disabling authentication clears all credentials and allows unrestricted access</li>
                 </ul>
               </div>
             </div>

src/app/api/auth/login/route.ts

@@ -38,7 +38,8 @@ export async function POST(request: NextRequest) {
       );
     }
 
-    const token = generateToken(username);
+    const sessionDurationDays = authConfig.sessionDurationDays;
+    const token = generateToken(username, sessionDurationDays);
 
     const response = NextResponse.json({ 
       success: true, 
@@ -46,12 +47,12 @@ export async function POST(request: NextRequest) {
       username 
     });
 
-    // Set httpOnly cookie
+    // Set httpOnly cookie with configured duration
     response.cookies.set('auth-token', token, {
       httpOnly: true,
       secure: process.env.NODE_ENV === 'production',
       sameSite: 'strict',
-      maxAge: 7 * 24 * 60 * 60, // 7 days
+      maxAge: sessionDurationDays * 24 * 60 * 60, // Use configured duration
       path: '/',
     });
 

src/app/api/auth/verify/route.ts

@@ -22,10 +22,17 @@ export async function GET(request: NextRequest) {
       );
     }
 
+    // Calculate expiration time in milliseconds
+    const expirationTime = decoded.exp ? decoded.exp * 1000 : null;
+    const currentTime = Date.now();
+    const timeUntilExpiration = expirationTime ? expirationTime - currentTime : null;
+
     return NextResponse.json({ 
       success: true, 
       username: decoded.username,
-      authenticated: true 
+      authenticated: true,
+      expirationTime,
+      timeUntilExpiration
     });
   } catch (error) {
     console.error('Error verifying token:', error);

src/app/api/settings/auth-credentials/route.ts

@@ -1,6 +1,6 @@
 import type { NextRequest } from 'next/server';
 import { NextResponse } from 'next/server';
-import { getAuthConfig, updateAuthCredentials, updateAuthEnabled } from '~/lib/auth';
+import { getAuthConfig, updateAuthCredentials, updateAuthEnabled, updateSessionDuration } from '~/lib/auth';
 import fs from 'fs';
 import path from 'path';
 import { withApiLogging } from '../../../../server/logging/withApiLogging';
@@ -14,6 +14,7 @@ export const GET = withApiLogging(async function GET() {
       enabled: authConfig.enabled,
       hasCredentials: authConfig.hasCredentials,
       setupCompleted: authConfig.setupCompleted,
+      sessionDurationDays: authConfig.sessionDurationDays,
     });
   } catch {
     // Error handled by withApiLogging
@@ -66,48 +67,75 @@ export const POST = withApiLogging(async function POST(request: NextRequest) {
 
 export const PATCH = withApiLogging(async function PATCH(request: NextRequest) {
   try {
-    const { enabled } = await request.json() as { enabled: boolean };
+    const body = await request.json() as { enabled?: boolean; sessionDurationDays?: number };
 
-    if (typeof enabled !== 'boolean') {
-      return NextResponse.json(
-        { error: 'Enabled flag must be a boolean' },
-        { status: 400 }
-      );
-    }
-
-    if (enabled) {
-      // When enabling, just update the flag
-      updateAuthEnabled(enabled);
-    } else {
-      // When disabling, clear all credentials and set flag to false
-      const envPath = path.join(process.cwd(), '.env');
-      let envContent = '';
-      if (fs.existsSync(envPath)) {
-        envContent = fs.readFileSync(envPath, 'utf8');
+    if (body.enabled !== undefined) {
+      const { enabled } = body;
+      
+      if (typeof enabled !== 'boolean') {
+        return NextResponse.json(
+          { error: 'Enabled flag must be a boolean' },
+          { status: 400 }
+        );
       }
 
-      // Remove AUTH_USERNAME and AUTH_PASSWORD_HASH
-      envContent = envContent.replace(/^AUTH_USERNAME=.*$/m, '');
-      envContent = envContent.replace(/^AUTH_PASSWORD_HASH=.*$/m, '');
-      
-      // Update or add AUTH_ENABLED
-      const enabledRegex = /^AUTH_ENABLED=.*$/m;
-      if (enabledRegex.test(envContent)) {
-        envContent = envContent.replace(enabledRegex, 'AUTH_ENABLED=false');
+      if (enabled) {
+        // When enabling, just update the flag
+        updateAuthEnabled(enabled);
       } else {
-        envContent += (envContent.endsWith('\n') ? '' : '\n') + 'AUTH_ENABLED=false\n';
+        // When disabling, clear all credentials and set flag to false
+        const envPath = path.join(process.cwd(), '.env');
+        let envContent = '';
+        if (fs.existsSync(envPath)) {
+          envContent = fs.readFileSync(envPath, 'utf8');
+        }
+
+        // Remove AUTH_USERNAME and AUTH_PASSWORD_HASH
+        envContent = envContent.replace(/^AUTH_USERNAME=.*$/m, '');
+        envContent = envContent.replace(/^AUTH_PASSWORD_HASH=.*$/m, '');
+        
+        // Update or add AUTH_ENABLED
+        const enabledRegex = /^AUTH_ENABLED=.*$/m;
+        if (enabledRegex.test(envContent)) {
+          envContent = envContent.replace(enabledRegex, 'AUTH_ENABLED=false');
+        } else {
+          envContent += (envContent.endsWith('\n') ? '' : '\n') + 'AUTH_ENABLED=false\n';
+        }
+
+        // Clean up empty lines
+        envContent = envContent.replace(/\n\n+/g, '\n');
+        
+        fs.writeFileSync(envPath, envContent);
       }
 
-      // Clean up empty lines
-      envContent = envContent.replace(/\n\n+/g, '\n');
-      
-      fs.writeFileSync(envPath, envContent);
+      return NextResponse.json({ 
+        success: true, 
+        message: `Authentication ${enabled ? 'enabled' : 'disabled'} successfully` 
+      });
     }
 
-    return NextResponse.json({ 
-      success: true, 
-      message: `Authentication ${enabled ? 'enabled' : 'disabled'} successfully` 
-    });
+    if (body.sessionDurationDays !== undefined) {
+      const { sessionDurationDays } = body;
+      
+      if (typeof sessionDurationDays !== 'number' || sessionDurationDays < 1 || sessionDurationDays > 365) {
+        return NextResponse.json(
+          { error: 'Session duration must be a number between 1 and 365 days' },
+          { status: 400 }
+        );
+      }
+
+      updateSessionDuration(sessionDurationDays);
+
+      return NextResponse.json({ 
+        success: true, 
+        message: `Session duration updated to ${sessionDurationDays} days` 
+      });
+    }
+
+    return NextResponse.json(
+      { error: 'No valid field to update' },
+      { status: 400 }
+    );
   } catch {
     // Error handled by withApiLogging
     return NextResponse.json(

src/app/page.tsx

@@ -16,10 +16,12 @@ import { Button } from './_components/ui/button';
 import { ContextualHelpIcon } from './_components/ContextualHelpIcon';
 import { ReleaseNotesModal, getLastSeenVersion } from './_components/ReleaseNotesModal';
 import { Footer } from './_components/Footer';
-import { Package, HardDrive, FolderOpen } from 'lucide-react';
+import { Package, HardDrive, FolderOpen, LogOut } from 'lucide-react';
 import { api } from '~/trpc/react';
+import { useAuth } from './_components/AuthProvider';
 
 export default function Home() {
+  const { isAuthenticated, logout } = useAuth();
   const [runningScript, setRunningScript] = useState<{ path: string; name: string; mode?: 'local' | 'ssh'; server?: any } | null>(null);
   const [activeTab, setActiveTab] = useState<'scripts' | 'downloaded' | 'installed'>(() => {
     if (typeof window !== 'undefined') {
@@ -152,7 +154,19 @@ export default function Home() {
             <h1 className="text-2xl sm:text-3xl lg:text-4xl font-bold text-foreground flex items-center justify-center gap-2 sm:gap-3 flex-1">
               <span className="break-words">PVE Scripts Management</span>
             </h1>
-            <div className="flex-1 flex justify-end">
+            <div className="flex-1 flex justify-end items-center gap-2">
+              {isAuthenticated && (
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  onClick={logout}
+                  className="text-muted-foreground hover:text-foreground transition-colors"
+                  aria-label="Logout"
+                  title="Logout"
+                >
+                  <LogOut className="h-4 w-4" />
+                </Button>
+              )}
               <ThemeToggle />
             </div>
           </div>

src/lib/auth.ts

@@ -5,7 +5,7 @@ import fs from 'fs';
 import path from 'path';
 
 const SALT_ROUNDS = 10;
-const JWT_EXPIRY = '7d'; // 7 days
+const DEFAULT_JWT_EXPIRY_DAYS = 7; // Default 7 days
 
 // Cache for JWT secret to avoid multiple file reads
 let jwtSecretCache: string | null = null;
@@ -66,18 +66,31 @@ export async function comparePassword(password: string, hash: string): Promise<b
 /**
  * Generate a JWT token
  */
-export function generateToken(username: string): string {
+export function generateToken(username: string, durationDays?: number): string {
   const secret = getJwtSecret();
-  return jwt.sign({ username }, secret, { expiresIn: JWT_EXPIRY });
+  const days = durationDays ?? DEFAULT_JWT_EXPIRY_DAYS;
+  return jwt.sign({ username }, secret, { expiresIn: `${days}d` });
+}
+
+/**
+ * Decode a JWT token without verification (for extracting expiration time)
+ */
+export function decodeToken(token: string): { username: string; exp?: number; iat?: number } | null {
+  try {
+    const decoded = jwt.decode(token) as { username: string; exp?: number; iat?: number } | null;
+    return decoded;
+  } catch {
+    return null;
+  }
 }
 
 /**
  * Verify a JWT token
  */
-export function verifyToken(token: string): { username: string } | null {
+export function verifyToken(token: string): { username: string; exp?: number; iat?: number } | null {
   try {
     const secret = getJwtSecret();
-    const decoded = jwt.verify(token, secret) as { username: string };
+    const decoded = jwt.verify(token, secret) as { username: string; exp?: number; iat?: number };
     return decoded;
   } catch {
     return null;
@@ -93,6 +106,7 @@ export function getAuthConfig(): {
   enabled: boolean;
   hasCredentials: boolean;
   setupCompleted: boolean;
+  sessionDurationDays: number;
 } {
   const envPath = path.join(process.cwd(), '.env');
   
@@ -103,6 +117,7 @@ export function getAuthConfig(): {
       enabled: false,
       hasCredentials: false,
       setupCompleted: false,
+      sessionDurationDays: DEFAULT_JWT_EXPIRY_DAYS,
     };
   }
 
@@ -128,6 +143,13 @@ export function getAuthConfig(): {
   const setupCompletedMatch = setupCompletedRegex.exec(envContent);
   const setupCompleted = setupCompletedMatch ? setupCompletedMatch[1]?.trim().toLowerCase() === 'true' : false;
   
+  // Extract AUTH_SESSION_DURATION_DAYS
+  const sessionDurationRegex = /^AUTH_SESSION_DURATION_DAYS=(.*)$/m;
+  const sessionDurationMatch = sessionDurationRegex.exec(envContent);
+  const sessionDurationDays = sessionDurationMatch 
+    ? parseInt(sessionDurationMatch[1]?.trim() || String(DEFAULT_JWT_EXPIRY_DAYS), 10) || DEFAULT_JWT_EXPIRY_DAYS
+    : DEFAULT_JWT_EXPIRY_DAYS;
+  
   const hasCredentials = !!(username && passwordHash);
   
   return {
@@ -136,6 +158,7 @@ export function getAuthConfig(): {
     enabled,
     hasCredentials,
     setupCompleted,
+    sessionDurationDays,
   };
 }
 
@@ -238,3 +261,30 @@ export function updateAuthEnabled(enabled: boolean): void {
   fs.writeFileSync(envPath, envContent);
 }
 
+/**
+ * Update AUTH_SESSION_DURATION_DAYS in .env
+ */
+export function updateSessionDuration(days: number): void {
+  // Validate: between 1 and 365 days
+  const validDays = Math.max(1, Math.min(365, Math.floor(days)));
+  
+  const envPath = path.join(process.cwd(), '.env');
+  
+  // Read existing .env file
+  let envContent = '';
+  if (fs.existsSync(envPath)) {
+    envContent = fs.readFileSync(envPath, 'utf8');
+  }
+
+  // Update or add AUTH_SESSION_DURATION_DAYS
+  const sessionDurationRegex = /^AUTH_SESSION_DURATION_DAYS=.*$/m;
+  if (sessionDurationRegex.test(envContent)) {
+    envContent = envContent.replace(sessionDurationRegex, `AUTH_SESSION_DURATION_DAYS=${validDays}`);
+  } else {
+    envContent += (envContent.endsWith('\n') ? '' : '\n') + `AUTH_SESSION_DURATION_DAYS=${validDays}\n`;
+  }
+
+  // Write back to .env file
+  fs.writeFileSync(envPath, envContent);
+}
+