fix: Use View::file() to render sticker template directly, add missing test route, and allow GET for regenerate

- Changed from View::make() to View::file() with full path resolution
- Added file existence check with detailed error logging
- Allow GET/POST for regenerate sticker endpoint for easier testing
- Add design name and customer surname to A6 PDF stickers
- Add regenerate sticker endpoint POST /test/sticker/{orderNumber}/regenerate
- Add test sticker preview page at /test/sticker/{orderNumber}

resources/views/stickers/qr-sticker.blade.php

@@ -170,11 +170,16 @@
                 <!-- Customer Info -->
                 <div class="customer-info">
                     <div class="label">Customer</div>
-                    <div class="name">{{ $order->user->name ?? 'N/A' }}</div>
+                    <div class="name">{{ $customerSurname }}</div>
                 </div>
 
                 <!-- Order Details -->
                 <div class="details">
+                    <div class="detail-row">
+                        <span class="detail-label">Design:</span>
+                        <span class="detail-value" style="font-size: 6.5pt;">{{ substr($designName, 0, 12) }}</span>
+                    </div>
+
                     <div class="detail-row">
                         <span class="detail-label">Date:</span>
                         <span class="detail-value">{{ $order->created_at->format('M d') }}</span>