Update language, add LICENSE and README

server/middleware/auth.js

@@ -8,7 +8,7 @@ export async function authenticateToken(req, res, next) {
   const token = authHeader && authHeader.split(' ')[1];
 
   if (!token) {
-    return res.status(401).json({ error: 'Authentifizierung erforderlich' });
+    return res.status(401).json({ error: 'Authentication required' });
   }
 
   try {
@@ -16,18 +16,18 @@ export async function authenticateToken(req, res, next) {
     const db = getDb();
     const user = await db.get('SELECT id, name, email, role, theme, language, avatar_color, avatar_image FROM users WHERE id = ?', [decoded.userId]);
     if (!user) {
-      return res.status(401).json({ error: 'Benutzer nicht gefunden' });
+      return res.status(401).json({ error: 'User not found' });
     }
     req.user = user;
     next();
   } catch (err) {
-    return res.status(403).json({ error: 'Ungültiges Token' });
+    return res.status(403).json({ error: 'Invalid token' });
   }
 }
 
 export function requireAdmin(req, res, next) {
   if (req.user.role !== 'admin') {
-    return res.status(403).json({ error: 'Administratorrechte erforderlich' });
+    return res.status(403).json({ error: 'Admin rights required' });
   }
   next();
 }