Mi cuenta: enlace a Battlepay y saldo de créditos bnet

- my_account: añade battlepay_credits (leído de battlenet_accounts.battlePayCredits)
- bnet.get_battlepay_credits() defensivo (0 si la columna no existe)
- partials/my-account.html: muestra 'Créditos Battlepay' y añade botón 'Tienda del cliente' que enlaza a /es/battlepay/

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

home/views.py

@@ -713,8 +713,13 @@ def my_account(request):
         token_status = "Sin solicitar"
         token_date = None
 
+    # Créditos Battlepay de la cuenta Battle.net
+    with connections['acore_auth'].cursor() as cursor:
+        battlepay_credits = bnet.get_battlepay_credits(cursor, request.session.get('bnet_id'))
+
     return render(request, 'my-account/my-account.html', {
         'is_logged_in': is_logged_in,
+        'battlepay_credits': battlepay_credits,
         'user_info': {
             'username': account_data[1],
             'reg_mail': account_data[2],