feat: Allow empty document titles, fix saved view routes not being accessible

lib/features/documents/view/widgets/items/document_detailed_item.dart

@@ -111,7 +111,7 @@ class DocumentDetailedItem extends DocumentItem {
               ],
             ).paddedLTRB(8, 8, 8, 4),
             Text(
-              document.title ?? '-',
+              document.title.isEmpty ? '-' : document.title,
               style: Theme.of(context).textTheme.titleMedium,
               maxLines: 2,
               overflow: TextOverflow.ellipsis,

lib/features/documents/view/widgets/items/document_grid_item.dart

@@ -113,7 +113,7 @@ class DocumentGridItem extends DocumentItem {
                       Padding(
                         padding: const EdgeInsets.only(bottom: 8.0),
                         child: Text(
-                          document.title ?? '-',
+                          document.title.isEmpty ? '-' : document.title,
                           maxLines: 3,
                           overflow: TextOverflow.ellipsis,
                           style: Theme.of(context).textTheme.titleMedium,

lib/features/documents/view/widgets/items/document_list_item.dart

@@ -58,7 +58,7 @@ class DocumentListItem extends DocumentItem {
             ],
           ),
           Text(
-            document.title ?? '-',
+            document.title.isEmpty ? '-' : document.title,
             overflow: TextOverflow.ellipsis,
             maxLines: 1,
           ),