ver. 0.320: API słowniki — ensure_producer; ProductRepository — producer_name w odpowiedzi

- DictionariesApiController: nowy endpoint POST ensure_producer (znajdź lub utwórz producenta)
- ProducerRepository: metoda ensureProducerForApi()
- ProductRepository: pole producer_name w odpowiedzi GET product
- ApiRouter: wstrzyknięto ProducerRepository do DictionariesApiController
- Zaktualizowano docs/API.md

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

autoload/Domain/Producer/ProducerRepository.php

@@ -357,4 +357,34 @@ class ProducerRepository
 
         return 0;
     }
+
+    /**
+     * Znajdź producenta po nazwie lub utwórz nowego (dla API).
+     *
+     * @return array{id: int, created: bool}
+     */
+    public function ensureProducerForApi(string $name): array
+    {
+        $name = trim($name);
+        if ($name === '') {
+            return ['id' => 0, 'created' => false];
+        }
+
+        $existing = $this->db->get('pp_shop_producer', 'id', ['name' => $name]);
+        if (!empty($existing)) {
+            return ['id' => (int)$existing, 'created' => false];
+        }
+
+        $this->db->insert('pp_shop_producer', [
+            'name'   => $name,
+            'status' => 1,
+            'img'    => null,
+        ]);
+        $id = (int)$this->db->id();
+        if ($id <= 0) {
+            return ['id' => 0, 'created' => false];
+        }
+
+        return ['id' => $id, 'created' => true];
+    }
 }