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/schemas/card.py

@@ -24,6 +24,16 @@ class CardEnrollRequest(BaseModel):
         None,
         description="Customer email (for public enrollment without customer_id)",
     )
+    # Self-enrollment fields (used to create customer if not found)
+    customer_name: str | None = Field(
+        None, description="Full name for self-enrollment"
+    )
+    customer_phone: str | None = Field(
+        None, description="Phone number for self-enrollment"
+    )
+    customer_birthday: str | None = Field(
+        None, description="Birthday (YYYY-MM-DD) for self-enrollment"
+    )
 
 
 class CardResponse(BaseModel):
@@ -38,6 +48,10 @@ class CardResponse(BaseModel):
     program_id: int
     enrolled_at_store_id: int | None = None
 
+    # Customer info (for list views)
+    customer_name: str | None = None
+    customer_email: str | None = None
+
     # Stamps
     stamp_count: int
     stamps_target: int  # From program