fix: properly call parent init in cart and product components

Issue:
- sessionId was undefined when cart/product pages loaded
- Parent shopLayoutData init() was being overridden, not called
- Session ID setup in parent wasn't running

Solution:
- Store reference to baseData before spreading
- Explicitly call baseData.init() in child component init
- This ensures sessionId is initialized before cart/product logic runs
- Add session ID logging for debugging

Now the session ID is properly initialized and cart functionality works.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/templates/shop/cart.html

@@ -169,8 +169,11 @@
 {% block extra_scripts %}
 <script>
 document.addEventListener('alpine:init', () => {
-    Alpine.data('shoppingCart', () => ({
+    Alpine.data('shoppingCart', () => {
-        ...shopLayoutData(),
+        const baseData = shopLayoutData();
+
+        return {
+            ...baseData,
 
             items: [],
             loading: false,
@@ -199,6 +202,12 @@ document.addEventListener('alpine:init', () => {
             // Initialize
             async init() {
                 console.log('[SHOP] Cart page initializing...');
+
+                // Call parent init to set up sessionId
+                if (baseData.init) {
+                    baseData.init.call(this);
+                }
+
                 await this.loadCart();
             },
 
@@ -302,7 +311,8 @@ document.addEventListener('alpine:init', () => {
                 window.location.href = '{{ base_url }}shop/checkout';
             }
         }
-    }));
+        };
+    });
 });
 </script>
 {% endblock %}

app/templates/shop/product.html

@@ -216,8 +216,11 @@ window.PRODUCT_ID = {{ product_id }};
 window.VENDOR_ID = {{ vendor.id }};
 
 document.addEventListener('alpine:init', () => {
-    Alpine.data('productDetail', () => ({
+    Alpine.data('productDetail', () => {
-        ...shopLayoutData(),
+        const baseData = shopLayoutData();
+
+        return {
+            ...baseData,
 
             // Data
             product: null,
@@ -253,8 +256,16 @@ document.addEventListener('alpine:init', () => {
             // Initialize
             async init() {
                 console.log('[SHOP] Product detail page initializing...');
+
+                // Call parent init to set up sessionId
+                if (baseData.init) {
+                    baseData.init.call(this);
+                }
+
                 console.log('[SHOP] Product ID:', this.productId);
                 console.log('[SHOP] Vendor ID:', this.vendorId);
+                console.log('[SHOP] Session ID:', this.sessionId);
+
                 await this.loadProduct();
             },
 
@@ -384,7 +395,8 @@ document.addEventListener('alpine:init', () => {
                 this.addingToCart = false;
             }
         }
-    }));
+        };
+    });
 });
 </script>
 {% endblock %}