fix: select kind for synthetic folders

app/client/components/__test__/restore-form.test.tsx

@@ -70,6 +70,7 @@ describe("RestoreForm", () => {
 			expect(restoreRequestBody).toEqual({
 				snapshotId: "snap-1",
 				include: ["/mnt/project"],
+				selectedItemKind: "dir",
 				overwrite: "always",
 			});
 		});

app/client/components/file-browsers/__tests__/snapshot-tree-browser.test.tsx

@@ -82,6 +82,26 @@ describe("SnapshotTreeBrowser", () => {
 		expect(await screen.findByRole("button", { name: "project" })).toBeTruthy();
 	});
 
+	test("renders a single file when no display base path is available", async () => {
+		const requests = mockListSnapshotFiles({
+			files: [{ name: "report.txt", path: "/mnt/project/report.txt", type: "file" }],
+		});
+
+		renderSnapshotTreeBrowser({
+			queryBasePath: "/mnt/project/report.txt",
+			displayBasePath: undefined,
+		});
+
+		expect(await screen.findByRole("button", { name: "report.txt" })).toBeTruthy();
+		expect(requests[0]).toEqual({
+			shortId: "repo-1",
+			snapshotId: "snap-1",
+			path: "/mnt/project/report.txt",
+			offset: null,
+			limit: null,
+		});
+	});
+
 	test("returns the ancestor folder path when selecting above the query root", async () => {
 		mockListSnapshotFiles({
 			files: [
@@ -91,6 +111,7 @@ describe("SnapshotTreeBrowser", () => {
 		});
 
 		let selectedPaths: Set<string> | undefined;
+		let selectedKind: "file" | "dir" | null = null;
 
 		renderSnapshotTreeBrowser({
 			queryBasePath: "/mnt/project/subdir",
@@ -99,6 +120,9 @@ describe("SnapshotTreeBrowser", () => {
 			onSelectionChange: (paths) => {
 				selectedPaths = paths;
 			},
+			onSingleSelectionKindChange: (kind) => {
+				selectedKind = kind;
+			},
 		});
 
 		const row = await screen.findByRole("button", { name: "project" });
@@ -107,6 +131,7 @@ describe("SnapshotTreeBrowser", () => {
 		await userEvent.click(checkbox);
 
 		expect(selectedPaths ? Array.from(selectedPaths) : []).toEqual(["/mnt/project"]);
+		expect(selectedKind === "dir").toBe(true);
 	});
 
 	test("shows selected folder state when full paths are provided from the parent", async () => {

app/client/components/file-browsers/snapshot-tree-browser.tsx

@@ -47,7 +47,7 @@ export const SnapshotTreeBrowser = (props: SnapshotTreeBrowserProps) => {
 	const { selectedPaths, onSelectionChange, onSingleSelectionKindChange, ...fileBrowserUiProps } = uiProps;
 	const queryClient = useQueryClient();
 	const normalizedQueryBasePath = normalizeAbsolutePath(queryBasePath);
-	const normalizedDisplayBasePath = normalizeAbsolutePath(displayBasePath ?? normalizedQueryBasePath);
+	const normalizedDisplayBasePath = normalizeAbsolutePath(displayBasePath ?? "/");
 
 	const { data, isLoading, error } = useQuery({
 		...listSnapshotFilesOptions({
@@ -98,6 +98,21 @@ export const SnapshotTreeBrowser = (props: SnapshotTreeBrowserProps) => {
 		const kinds = new Map<string, "file" | "dir">();
 		for (const entry of fileBrowser.fileArray) {
 			kinds.set(entry.path, entry.type === "file" ? "file" : "dir");
+
+			let parentPath = entry.path;
+			while (true) {
+				const lastSlashIndex = parentPath.lastIndexOf("/");
+				if (lastSlashIndex <= 0) {
+					break;
+				}
+
+				parentPath = parentPath.slice(0, lastSlashIndex);
+				if (kinds.has(parentPath)) {
+					continue;
+				}
+
+				kinds.set(parentPath, "dir");
+			}
 		}
 		return kinds;
 	}, [fileBrowser.fileArray]);