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/routes/api/storefront.py

@@ -78,12 +78,16 @@ def self_enroll(
     # Check if self-enrollment is allowed
     program_service.check_self_enrollment_allowed(db, store.merchant_id)
 
-    # Resolve customer_id
+    # Resolve customer_id (create customer if not found for self-enrollment)
     customer_id = card_service.resolve_customer_id(
         db,
         customer_id=data.customer_id,
         email=data.email,
         store_id=store.id,
+        create_if_missing=True,
+        customer_name=data.customer_name,
+        customer_phone=data.customer_phone,
+        customer_birthday=data.customer_birthday,
     )
 
     logger.info(f"Self-enrollment for customer {customer_id} at store {store.subdomain}")