fix: checkout issues - hidden fields, coupons, shipping in order totals

1. Hidden fields now properly hidden in SPA
   - Added billing_postcode and shipping_postcode to isFieldHidden checks
   - Fields with type='hidden' from PHP now conditionally rendered

2. Coupons now applied to order total
   - Added coupons array to order submission payload
   - CartController now calls calculate_totals() before reading discounts
   - Returns per-coupon discount amounts {code, discount, type}

3. Shipping now applied to order total
   - Already handled in submit() via find_shipping_rate_for_order
   - Frontend now sends shipping_method in payload

4. Order details now include shipping/tracking info
   - checkout/order/{id} API includes shipping_lines, tracking_number, tracking_url
   - account/orders/{id} API includes same shipping/tracking fields
   - Tracking info read from multiple plugin meta keys

5. Thank you/OrderDetails page shows shipping method and AWB
   - Shipping Method section with courier name and cost
   - AWB tracking for processing/completed orders with Track Shipment button

RAJAONGKIR_INTEGRATION.md

@@ -122,6 +122,10 @@ add_filter('woocommerce_checkout_fields', function($fields) {
             $fields['billing']['billing_city']['type'] = 'hidden';
             $fields['billing']['billing_city']['required'] = false;
         }
+        if (isset($fields['billing']['billing_postcode'])) {
+            $fields['billing']['billing_postcode']['type'] = 'hidden';
+            $fields['billing']['billing_postcode']['required'] = false;
+        }
         
         // Hide shipping fields
         if (isset($fields['shipping']['shipping_country'])) {
@@ -137,6 +141,10 @@ add_filter('woocommerce_checkout_fields', function($fields) {
             $fields['shipping']['shipping_city']['type'] = 'hidden';
             $fields['shipping']['shipping_city']['required'] = false;
         }
+        if (isset($fields['shipping']['shipping_postcode'])) {
+            $fields['shipping']['shipping_postcode']['type'] = 'hidden';
+            $fields['shipping']['shipping_postcode']['required'] = false;
+        }
     }
     
     // Destination field definition (reused for billing and shipping)

customer-spa/src/pages/Checkout/index.tsx

@@ -532,6 +532,7 @@ export default function Checkout() {
         },
         payment_method: paymentMethod,
         shipping_method: selectedShippingRate || undefined, // Selected shipping rate ID
+        coupons: appliedCoupons.map(c => c.code), // Send applied coupon codes
         customer_note: orderNotes,
         // Include all custom field data for backend processing
         custom_fields: customFieldData,
@@ -771,16 +772,19 @@ export default function Checkout() {
                             )}
                           </div>
                         )}
-                        <div>
+                        {/* Postcode field - hidden if PHP sets type to 'hidden' */}
-                          <label className="block text-sm font-medium mb-2">Postcode / ZIP *</label>
+                        {!isFieldHidden('billing_postcode') && (
-                          <input
+                          <div>
-                            type="text"
+                            <label className="block text-sm font-medium mb-2">Postcode / ZIP *</label>
-                            required
+                            <input
-                            value={billingData.postcode}
+                              type="text"
-                            onChange={(e) => setBillingData({ ...billingData, postcode: e.target.value })}
+                              required
-                            className="w-full border rounded-lg px-4 py-2"
+                              value={billingData.postcode}
-                          />
+                              onChange={(e) => setBillingData({ ...billingData, postcode: e.target.value })}
-                        </div>
+                              className="w-full border rounded-lg px-4 py-2"
+                            />
+                          </div>
+                        )}
 
                         {/* Custom billing fields from plugins */}
                         {billingCustomFields.map(field => (
@@ -962,16 +966,19 @@ export default function Checkout() {
                               )}
                             </div>
                           )}
-                          <div>
+                          {/* Postcode field - hidden if PHP sets type to 'hidden' */}
-                            <label className="block text-sm font-medium mb-2">Postcode / ZIP *</label>
+                          {!isFieldHidden('shipping_postcode') && (
-                            <input
+                            <div>
-                              type="text"
+                              <label className="block text-sm font-medium mb-2">Postcode / ZIP *</label>
-                              required
+                              <input
-                              value={shippingData.postcode}
+                                type="text"
-                              onChange={(e) => setShippingData({ ...shippingData, postcode: e.target.value })}
+                                required
-                              className="w-full border rounded-lg px-4 py-2"
+                                value={shippingData.postcode}
-                            />
+                                onChange={(e) => setShippingData({ ...shippingData, postcode: e.target.value })}
-                          </div>
+                                className="w-full border rounded-lg px-4 py-2"
+                              />
+                            </div>
+                          )}
 
                           {/* Custom shipping fields from plugins */}
                           {shippingCustomFields.map(field => (

includes/Api/CheckoutController.php

@@ -197,6 +197,33 @@ class CheckoutController {
                 'image' => $product ? wp_get_attachment_image_url($product->get_image_id(), 'thumbnail') : null,
             ];
         }
+        
+        // Build shipping lines
+        $shipping_lines = [];
+        foreach ($order->get_shipping_methods() as $shipping_item) {
+            $shipping_lines[] = [
+                'id' => $shipping_item->get_id(),
+                'method_title' => $shipping_item->get_method_title(),
+                'method_id' => $shipping_item->get_method_id(),
+                'total' => wc_price($shipping_item->get_total()),
+            ];
+        }
+        
+        // Get tracking info from order meta (various plugins use different keys)
+        $tracking_number = $order->get_meta('_tracking_number') 
+            ?: $order->get_meta('_wc_shipment_tracking_items') 
+            ?: $order->get_meta('_rajaongkir_awb_number')
+            ?: '';
+        $tracking_url = $order->get_meta('_tracking_url') 
+            ?: $order->get_meta('_rajaongkir_tracking_url')
+            ?: '';
+        
+        // Check for shipment tracking plugin format (array of tracking items)
+        if (is_array($tracking_number) && !empty($tracking_number)) {
+            $first_tracking = reset($tracking_number);
+            $tracking_number = $first_tracking['tracking_number'] ?? '';
+            $tracking_url = $first_tracking['tracking_url'] ?? $tracking_url;
+        }
 
         return [
             'ok' => true,
@@ -204,12 +231,17 @@ class CheckoutController {
             'number' => $order->get_order_number(),
             'status' => $order->get_status(),
             'subtotal' => (float) $order->get_subtotal(),
+            'discount_total' => (float) $order->get_discount_total(),
             'shipping_total' => (float) $order->get_shipping_total(),
             'tax_total' => (float) $order->get_total_tax(),
             'total' => (float) $order->get_total(),
             'currency' => $order->get_currency(),
             'currency_symbol' => get_woocommerce_currency_symbol($order->get_currency()),
             'payment_method' => $order->get_payment_method_title(),
+            'needs_shipping' => count($shipping_lines) > 0 || $order->needs_shipping_address(),
+            'shipping_lines' => $shipping_lines,
+            'tracking_number' => $tracking_number,
+            'tracking_url' => $tracking_url,
             'billing' => [
                 'first_name' => $order->get_billing_first_name(),
                 'last_name' => $order->get_billing_last_name(),

includes/Frontend/AccountController.php

@@ -521,6 +521,37 @@ class AccountController {
             $data['shipping_total'] = html_entity_decode(strip_tags(wc_price($order->get_shipping_total())));
             $data['tax_total'] = html_entity_decode(strip_tags(wc_price($order->get_total_tax())));
             $data['discount_total'] = html_entity_decode(strip_tags(wc_price($order->get_discount_total())));
+            
+            // Shipping lines with method details
+            $shipping_lines = [];
+            foreach ($order->get_shipping_methods() as $shipping_item) {
+                $shipping_lines[] = [
+                    'id' => $shipping_item->get_id(),
+                    'method_title' => $shipping_item->get_method_title(),
+                    'method_id' => $shipping_item->get_method_id(),
+                    'total' => html_entity_decode(strip_tags(wc_price($shipping_item->get_total()))),
+                ];
+            }
+            $data['shipping_lines'] = $shipping_lines;
+            
+            // Tracking info (from various shipping tracking plugins)
+            $tracking_number = $order->get_meta('_tracking_number') 
+                ?: $order->get_meta('_wc_shipment_tracking_items') 
+                ?: $order->get_meta('_rajaongkir_awb_number')
+                ?: '';
+            $tracking_url = $order->get_meta('_tracking_url') 
+                ?: $order->get_meta('_rajaongkir_tracking_url')
+                ?: '';
+            
+            // Handle WooCommerce Shipment Tracking plugin format (array)
+            if (is_array($tracking_number) && !empty($tracking_number)) {
+                $first_tracking = reset($tracking_number);
+                $tracking_number = $first_tracking['tracking_number'] ?? '';
+                $tracking_url = $first_tracking['tracking_url'] ?? $tracking_url;
+            }
+            
+            $data['tracking_number'] = $tracking_number;
+            $data['tracking_url'] = $tracking_url;
         }
         
         return $data;