Fix code review issues: null checks in ProductCurrencyPrice, fix PHPDoc type

Agent-Logs-Url: https://github.com/silvershop/silvershop-core/sessions/9ea8f7d5-bfca-4c21-a17f-f048b08ff414

Co-authored-by: wilr <101629+wilr@users.noreply.github.com>

Author: Copilot

src/Model/Product/ProductCurrencyPrice.php

@@ -50,21 +50,25 @@ class ProductCurrencyPrice extends DataObject
 
     public function canCreate($member = null, $context = []): bool
     {
-        return $this->Product()->canEdit($member);
+        $product = $this->Product();
+        return $product && $product->exists() ? $product->canEdit($member) : false;
     }
 
     public function canEdit($member = null): bool
     {
-        return $this->Product()->canEdit($member);
+        $product = $this->Product();
+        return $product && $product->exists() ? $product->canEdit($member) : false;
     }
 
     public function canDelete($member = null): bool
     {
-        return $this->Product()->canEdit($member);
+        $product = $this->Product();
+        return $product && $product->exists() ? $product->canEdit($member) : false;
     }
 
     public function canView($member = null): bool
     {
-        return $this->Product()->canView($member);
+        $product = $this->Product();
+        return $product && $product->exists() ? $product->canView($member) : false;
     }
 }

tests/php/Currency/ProductCurrencyPriceTest.php

@@ -22,7 +22,7 @@ final class ProductCurrencyPriceTest extends SapphireTest
     protected static $fixture_file = __DIR__ . '/../Fixtures/shop.yml';
 
     /**
-     * @var SimpleCurrencyService
+     * @var CurrencyService
      */
     private CurrencyService $currencyService;