fix: loyalty storefront and store card detail — enrollment, context, and Alpine.js

- Fix storefront enabled_modules always empty (page_context overwrote computed
  set with empty default via extra_context)
- Fix storefront loyalty JS using store's data() instead of shopLayoutData()
- Remove defer from storefront loyalty scripts to prevent Alpine race condition
- Fix enrollment field name mismatch (customer_email → email) in both store
  and storefront JS
- Add self-enrollment customer creation (resolve_customer_id with
  create_if_missing) including hashed_password and customer_number
- Fix card list showing "Unknown" — add customer_name/email to CardResponse
- Add GET /cards/{card_id} detail endpoint for store card detail page
- Fix enroll-success.html using data() instead of shopLayoutData()
- Fix enrollment redirect reading response.card_number instead of
  response.card.card_number

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/loyalty/templates/loyalty/storefront/dashboard.html

@@ -228,5 +228,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script defer src="{{ url_for('loyalty_static', path='storefront/js/loyalty-dashboard.js') }}"></script>
+<script src="{{ url_for('loyalty_static', path='storefront/js/loyalty-dashboard.js') }}"></script>
 {% endblock %}

app/modules/loyalty/templates/loyalty/storefront/enroll-success.html

@@ -86,7 +86,7 @@
 <script>
 function customerLoyaltyEnrollSuccess() {
     return {
-        ...data(),
+        ...shopLayoutData(),
         walletUrls: { google_wallet_url: null, apple_wallet_url: null },
         async init() {
             try {

app/modules/loyalty/templates/loyalty/storefront/enroll.html

@@ -131,5 +131,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script defer src="{{ url_for('loyalty_static', path='storefront/js/loyalty-enroll.js') }}"></script>
+<script src="{{ url_for('loyalty_static', path='storefront/js/loyalty-enroll.js') }}"></script>
 {% endblock %}

app/modules/loyalty/templates/loyalty/storefront/history.html

@@ -103,5 +103,5 @@
 {% endblock %}
 
 {% block extra_scripts %}
-<script defer src="{{ url_for('loyalty_static', path='storefront/js/loyalty-history.js') }}"></script>
+<script src="{{ url_for('loyalty_static', path='storefront/js/loyalty-history.js') }}"></script>
 {% endblock %}