fix: Initialize enableGoogleDriveIntegration with default value

src/lib/components/admin/Settings/Documents.svelte

@@ -249,7 +249,7 @@
 			fileMaxSize = res?.file.max_size ?? '';
 			fileMaxCount = res?.file.max_count ?? '';
 
-			enableGoogleDriveIntegration = res.enable_google_drive_integration;
+			enableGoogleDriveIntegration = res.enable_google_drive_integration ?? false;
 			console.log('Google Drive Integration onMount:', enableGoogleDriveIntegration);
 			if (enableGoogleDriveIntegration === undefined) {
 			    console.error('enableGoogleDriveIntegration is undefined onMount');