[studio] Fix file explorer to treat empty directories as directories

src/olympic/keel/include/keel/assetmanager.hpp

@@ -295,7 +295,9 @@ class AssetManager {
 		}
 
 		ox::Error reloadAsset(ox::StringViewCR assetId) noexcept {
-			m_fileUpdated[assetId]->emit(assetId);
+			if (m_fileUpdated.contains(assetId)) {
+				m_fileUpdated[assetId]->emit(assetId);
+			}
 			return {};
 		}
 

src/olympic/studio/modlib/src/filetreemodel.cpp

@@ -88,7 +88,7 @@ FileTreeModel::FileTreeModel(
 void FileTreeModel::draw(turbine::Context &tctx) const noexcept {
 	constexpr auto dirFlags = ImGuiTreeNodeFlags_OpenOnArrow | ImGuiTreeNodeFlags_OpenOnDoubleClick;
 	auto const selected = m_explorer.selected(this) ? ImGuiTreeNodeFlags_Selected : 0;
-	if (!m_children.empty()) {
+	if (m_fileType == ox::FileType::Directory) {
 		auto const nodeOpen = ImGui::TreeNodeEx(m_name.c_str(), dirFlags | selected);
 		if (ImGui::IsItemActivated() || ImGui::IsItemClicked(1)) {
 			m_explorer.setSelectedNode(this);
@@ -104,7 +104,8 @@ void FileTreeModel::draw(turbine::Context &tctx) const noexcept {
 		if (ig::DragDropTarget const dragDropTarget; dragDropTarget) {
 			auto const [ref, err] = ig::getDragDropPayload<FileRef>("FileRef");
 			if (!err) {
-				auto const name = substr(ref.path, find(ref.path.rbegin(), ref.path.rend(), '/').offset() + 1);
+				auto const name = substr(
+					ref.path, find(ref.path.rbegin(), ref.path.rend(), '/').offset() + 1);
 				if (ref.isDir) {
 					m_explorer.dirMoved(ref.path, sfmt("{}/{}", m_fullPath, name));
 				} else {