neon_files: Do not expect props to be available

packages/neon/neon_files/lib/models/file_details.dart

@@ -19,13 +19,13 @@ class FileDetails {
 
   final bool isDirectory;
 
-  final int size;
+  final int? size;
 
   final String? etag;
 
   final String? mimeType;
 
-  final DateTime lastModified;
+  final DateTime? lastModified;
 
   final bool? hasPreview;
 

packages/neon/neon_files/lib/pages/details.dart

@@ -46,10 +46,15 @@ class FilesDetailsPage extends StatelessWidget {
                         : AppLocalizations.of(context).detailsFileName: details.name,
                     AppLocalizations.of(context).detailsParentFolder:
                         details.path.length == 1 ? '/' : details.path.sublist(0, details.path.length - 1).join('/'),
+                    if (details.size != null) ...{
                       details.isDirectory
                           ? AppLocalizations.of(context).detailsFolderSize
                           : AppLocalizations.of(context).detailsFileSize: filesize(details.size, 1),
-                    AppLocalizations.of(context).detailsLastModified: details.lastModified.toLocal().toIso8601String(),
+                    },
+                    if (details.lastModified != null) ...{
+                      AppLocalizations.of(context).detailsLastModified:
+                          details.lastModified!.toLocal().toIso8601String(),
+                    },
                     if (details.isFavorite != null) ...{
                       AppLocalizations.of(context).detailsIsFavorite: details.isFavorite!
                           ? AppLocalizations.of(context).actionYes

packages/neon/neon_files/lib/pages/main.dart

@@ -29,7 +29,7 @@ class _FilesMainPageState extends State<FilesMainPage> {
           filesBloc: bloc,
           onPickFile: (final details) async {
             final sizeWarning = bloc.options.downloadSizeWarning.value;
-            if (sizeWarning != null && details.size > sizeWarning) {
+            if (sizeWarning != null && details.size != null && details.size! > sizeWarning) {
               // ignore: use_build_context_synchronously
               if (!(await showConfirmationDialog(
                 context,

packages/neon/neon_files/lib/widgets/browser_view.dart

@@ -116,12 +116,12 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                               isDirectory: matchingUploadTasks.isEmpty && file.isDirectory,
                                               size: matchingUploadTasks.isNotEmpty
                                                   ? matchingUploadTasks.first.size
-                                                  : file.size!,
+                                                  : file.size,
                                               etag: matchingUploadTasks.isNotEmpty ? null : file.etag,
                                               mimeType: matchingUploadTasks.isNotEmpty ? null : file.mimeType,
                                               lastModified: matchingUploadTasks.isNotEmpty
                                                   ? matchingUploadTasks.first.lastModified
-                                                  : file.lastModified!,
+                                                  : file.lastModified,
                                               hasPreview: matchingUploadTasks.isNotEmpty ? null : file.hasPreview,
                                               isFavorite: matchingUploadTasks.isNotEmpty ? null : file.favorite,
                                             ),
@@ -235,10 +235,12 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
         ),
         subtitle: Row(
           children: [
+            if (details.lastModified != null) ...[
               RelativeTime(
-              date: details.lastModified,
+                date: details.lastModified!,
               ),
-            if (details.size > 0) ...[
+            ],
+            if (details.size != null && details.size! > 0) ...[
               const SizedBox(
                 width: 10,
               ),
@@ -396,7 +398,7 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                       break;
                     case FilesFileAction.sync:
                       final sizeWarning = widget.bloc.options.downloadSizeWarning.value;
-                      if (sizeWarning != null && details.size > sizeWarning) {
+                      if (sizeWarning != null && details.size != null && details.size! > sizeWarning) {
                         // ignore: use_build_context_synchronously
                         if (!(await showConfirmationDialog(
                           context,