Fix image update in edit, QR code generation and translations

public/index.php

@@ -48,7 +48,7 @@ $router->addRoute('GET', '/api/parts', [ItemController::class, 'renderAddForm'])
 // --- API CRUD Routes ---
 // Items
 $router->addRoute('POST', '/api/items', [ItemController::class, 'create']);
-$router->addRoute('PUT', '/api/items/{id:\d+}', [ItemController::class, 'update']);
+$router->addRoute('POST', '/api/items/{id:\d+}', [ItemController::class, 'update']);
 $router->addRoute('DELETE', '/api/items/{id:\d+}', [ItemController::class, 'delete']);
 
 // Categories

public/js/app.js

@@ -323,7 +323,7 @@ document.addEventListener('DOMContentLoaded', function() {
         }
 
         fetch('/api/items/' + id, {
-            method: 'PUT',
+            method: 'POST',
             body: formData
         })
         .then(response => response.json())