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.

backend/src/controllers/auth.js

@@ -191,7 +191,7 @@ async function verifyEmailByToken(req, res, next) {
     }
 
     // Update user - mark as verified and clear tokens
-    await prisma.user.update({
+    const updatedUser = await prisma.user.update({
       where: { id: user.id },
       data: {
         emailVerified: true,
@@ -208,9 +208,19 @@ async function verifyEmailByToken(req, res, next) {
       console.error('Failed to send welcome email:', emailError);
     }
 
+    // Generate new JWT token with updated emailVerified status
+    const jwtToken = generateToken({ userId: updatedUser.id });
+
+    // Remove sensitive data
+    const { passwordHash, verificationToken, verificationCode, verificationTokenExpiry, resetToken, resetTokenExpiry, ...userWithoutPassword } = updatedUser;
+
     res.status(200).json({
       success: true,
       message: 'Email verified successfully!',
+      data: {
+        user: userWithoutPassword,
+        token: jwtToken,
+      },
     });
   } catch (error) {
     next(error);
@@ -261,7 +271,7 @@ async function verifyEmailByCode(req, res, next) {
     }
 
     // Update user - mark as verified and clear tokens
-    await prisma.user.update({
+    const updatedUser = await prisma.user.update({
       where: { id: user.id },
       data: {
         emailVerified: true,
@@ -278,9 +288,19 @@ async function verifyEmailByCode(req, res, next) {
       console.error('Failed to send welcome email:', emailError);
     }
 
+    // Generate new JWT token with updated emailVerified status
+    const jwtToken = generateToken({ userId: updatedUser.id });
+
+    // Remove sensitive data
+    const { passwordHash, verificationToken, verificationCode, verificationTokenExpiry, resetToken, resetTokenExpiry, ...userWithoutPassword } = updatedUser;
+
     res.status(200).json({
       success: true,
       message: 'Email verified successfully!',
+      data: {
+        user: userWithoutPassword,
+        token: jwtToken,
+      },
     });
   } catch (error) {
     next(error);