fix: AWS SES configuration and email verification flow

Changes:
- Updated AWS_REGION to eu-central-1 in env examples
- Fixed email verification to return new JWT token with updated emailVerified status
- Added updateUser function to AuthContext for token refresh
- Updated frontend to save new token after email verification
- Fixed variable naming conflict (token vs jwtToken) in verification endpoints
- Changed WSDC ID placeholder from 26997 to 12345

This ensures the verification banner disappears immediately after
email verification without requiring re-login.

frontend/src/pages/RegisterPage.jsx

@@ -195,7 +195,7 @@ const RegisterPage = () => {
                     value={wsdcId}
                     onChange={(e) => setWsdcId(e.target.value.replace(/\D/g, ''))}
                     className="pl-10 block w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:ring-primary-500 focus:border-primary-500"
-                    placeholder="26997"
+                    placeholder="12345"
                     maxLength={10}
                   />
                   {wsdcLoading && (

frontend/src/pages/VerifyEmailPage.jsx

@@ -1,11 +1,13 @@
 import { useState, useEffect } from 'react';
 import { useNavigate, useSearchParams, Link } from 'react-router-dom';
 import { authAPI } from '../services/api';
+import { useAuth } from '../contexts/AuthContext';
 import { Video, Mail, CheckCircle, XCircle, Loader2, ArrowRight } from 'lucide-react';
 
 const VerifyEmailPage = () => {
   const [searchParams] = useSearchParams();
   const navigate = useNavigate();
+  const { updateUser } = useAuth();
   const token = searchParams.get('token');
 
   const [verificationMode, setVerificationMode] = useState(token ? 'token' : 'code');
@@ -31,6 +33,11 @@ const VerifyEmailPage = () => {
     try {
       const response = await authAPI.verifyEmailByToken(verificationToken);
       if (response.success) {
+        // Update user and token if returned
+        if (response.data?.user && response.data?.token) {
+          updateUser(response.data.user);
+          localStorage.setItem('token', response.data.token);
+        }
         setSuccess(true);
       } else {
         setError(response.error || 'Verification failed');
@@ -56,6 +63,11 @@ const VerifyEmailPage = () => {
     try {
       const response = await authAPI.verifyEmailByCode(email, code);
       if (response.success) {
+        // Update user and token if returned
+        if (response.data?.user && response.data?.token) {
+          updateUser(response.data.user);
+          localStorage.setItem('token', response.data.token);
+        }
         setSuccess(true);
       } else {
         setError(response.error || 'Verification failed');