Add Scan functional, tmp UI

src/App.svelte

@@ -1,14 +1,17 @@
 <script>
 	import MainMenu from '$lib/pages/main/MainMenu.svelte';
 	import PrintMenu from '$lib/pages/print/PrintMenu.svelte';
+	import ScanPage from '$lib/pages/scan/ScanPage.svelte';
 
-	/** @type {'main' | 'print'} */
+	/** @type {'main' | 'print' | 'scan'} */
 	let page = $state('main');
 
 	/** @param {'print' | 'scan' | 'photo' | 'access'} id */
 	function handleAction(id) {
 		if (id === 'print') {
 			page = 'print';
+		} else if (id === 'scan') {
+			page = 'scan';
 		} else {
 			console.log('Выбрано действие:', id);
 		}
@@ -53,5 +56,7 @@
 		<MainMenu onAction={handleAction} />
 	{:else if page === 'print'}
 		<PrintMenu onBack={handleBack} />
+	{:else if page === 'scan'}
+		<ScanPage onBack={handleBack} />
 	{/if}
 </main>