fix: Extract design_name and print_size from order items for Trello

- design_name: Get product name from first order item
- print_size: Calculate from item dimensions (wallpaper: length in m, mural: width x height in cm)
- Add fallback values ('') when items/dimensions unavailable
- Prevents null errors when populating Trello custom fields

config/trello.php

@@ -21,6 +21,20 @@ return [
     'board_id' => env('TRELLO_BOARD_ID') ?: ($env['TRELLO_BOARD_ID'] ?? null),
     'webhook_secret' => env('TRELLO_WEBHOOK_SECRET') ?: ($env['TRELLO_WEBHOOK_SECRET'] ?? null),
 
+    'custom_fields' => [
+        'order_id'      => '695792226064b67fb4bd46f0',
+        'design_name'   => '69579233dbdfa1de96beef7f',
+        'customer_name' => '6957924221e31eb4a7a271b0',
+        'print_size'    => '6957926dab26ae511aaf17e9',
+
+        'ship_w'        => '6957929435cdaf8b318b16d5',
+        'ship_h'        => '695792a3c5ef01fd66d9bb66',
+        'ship_l'        => '695792bdba79b9499f0f5f59',
+        'weight'        => '695792c98bc7955d6bd796c0',
+
+        'date_created'  => '695792ef2545efa98ef8dce7',
+    ],
+
     'lists' => [
         'standard' => [
             'new_order' => env('TRELLO_LIST_ID_NEW_ORDER') ?: ($env['TRELLO_LIST_ID_NEW_ORDER'] ?? null),