feat(19-ui-integration): przycisk Drukuj, bulk print, kolejka wydruku

- Przycisk "Drukuj" w prepare.php i show.php z AJAX + duplikat protection
- Bulk print z listy zamówień (checkboxy + header action)
- Kolejka wydruku w Ustawienia > Drukowanie (filtr statusu, retry)
- POST /api/print/jobs/bulk endpoint (package_ids + order_ids)
- ensureLabel() auto-download przez ShipmentProviderRegistry
- Apaczka carrier_id = nazwa usługi, kolumna Przewoznik
- Tab persistence (localStorage), label file_exists check
- Fix use statement ApaczkaApiClient, redirect po utworzeniu przesyłki
- Phase 17 (receipt duplicate guard) + Phase 18 (print queue backend) docs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Modules/Printing/PrintApiKeyRepository.php

@@ -0,0 +1,79 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Modules\Printing;
+
+use PDO;
+
+final class PrintApiKeyRepository
+{
+    public function __construct(
+        private readonly PDO $pdo
+    ) {
+    }
+
+    public function create(string $name, string $keyHash, string $keyPrefix): int
+    {
+        $statement = $this->pdo->prepare(
+            'INSERT INTO print_api_keys (name, key_hash, key_prefix) VALUES (:name, :key_hash, :key_prefix)'
+        );
+        $statement->execute([
+            'name' => $name,
+            'key_hash' => $keyHash,
+            'key_prefix' => $keyPrefix,
+        ]);
+
+        return (int) $this->pdo->lastInsertId();
+    }
+
+    /**
+     * @return array<string, mixed>|null
+     */
+    public function findByKeyHash(string $keyHash): ?array
+    {
+        $statement = $this->pdo->prepare(
+            'SELECT * FROM print_api_keys WHERE key_hash = :key_hash LIMIT 1'
+        );
+        $statement->execute(['key_hash' => $keyHash]);
+        $row = $statement->fetch(PDO::FETCH_ASSOC);
+
+        return is_array($row) ? $row : null;
+    }
+
+    /**
+     * @return list<array<string, mixed>>
+     */
+    public function listAll(): array
+    {
+        $statement = $this->pdo->query(
+            'SELECT id, name, key_prefix, is_active, last_used_at, created_at FROM print_api_keys ORDER BY created_at DESC'
+        );
+        $rows = $statement !== false ? $statement->fetchAll(PDO::FETCH_ASSOC) : [];
+
+        return is_array($rows) ? $rows : [];
+    }
+
+    public function deactivate(int $id): void
+    {
+        $statement = $this->pdo->prepare(
+            'UPDATE print_api_keys SET is_active = 0 WHERE id = :id'
+        );
+        $statement->execute(['id' => $id]);
+    }
+
+    public function delete(int $id): void
+    {
+        $statement = $this->pdo->prepare(
+            'DELETE FROM print_api_keys WHERE id = :id'
+        );
+        $statement->execute(['id' => $id]);
+    }
+
+    public function updateLastUsed(int $id): void
+    {
+        $statement = $this->pdo->prepare(
+            'UPDATE print_api_keys SET last_used_at = NOW() WHERE id = :id'
+        );
+        $statement->execute(['id' => $id]);
+    }
+}