ver. 0.304: Configurable payment method order amount limits

Replace hardcoded PayPo condition (id=6, 40-1000 PLN) with generic
min/max order amount columns on pp_shop_payment_methods. Admin form
fields added, frontend basket checkout filters dynamically. Cache
invalidation on save. 4 new tests (734 total, 2080 assertions).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

autoload/admin/Controllers/ShopPaymentMethodController.php

@@ -182,6 +182,8 @@ class ShopPaymentMethodController
             'description' => (string)($paymentMethod['description'] ?? ''),
             'status' => (int)($paymentMethod['status'] ?? 0),
             'apilo_payment_type_id' => $paymentMethod['apilo_payment_type_id'] ?? '',
+            'min_order_amount' => $paymentMethod['min_order_amount'] ?? '',
+            'max_order_amount' => $paymentMethod['max_order_amount'] ?? '',
         ];
 
         $fields = [
@@ -203,6 +205,16 @@ class ShopPaymentMethodController
                 'tab' => 'settings',
                 'rows' => 5,
             ]),
+            FormField::number('min_order_amount', [
+                'label' => 'Min. kwota zamowienia (PLN)',
+                'tab' => 'settings',
+                'step' => 0.01,
+            ]),
+            FormField::number('max_order_amount', [
+                'label' => 'Maks. kwota zamowienia (PLN)',
+                'tab' => 'settings',
+                'step' => 0.01,
+            ]),
             FormField::select('apilo_payment_type_id', [
                 'label' => 'Typ platnosci Apilo',
                 'tab' => 'settings',