fix(webui): name temporary chats from first message

webui/src/tests/app-layout.test.tsx

@@ -466,7 +466,10 @@ describe("App layout", () => {
       name: "first private message",
     }));
     await waitFor(() => expect(window.location.hash).toBe(firstHash));
-    expect(screen.getByText("Temporary chat")).toBeInTheDocument();
+    expect(within(screen.getByTestId("thread-header")).getByText(
+      "first private message",
+    )).toBeInTheDocument();
+    await waitFor(() => expect(document.title).toBe("first private message · nanobot"));
     expect(screen.queryByRole("button", { name: "Temporary chat" })).not.toBeInTheDocument();
 
     fireEvent.click(within(sidebar).getByRole("button", {

webui/src/tests/chat-list.test.tsx

@@ -156,7 +156,7 @@ describe("ChatList", () => {
     const temporarySession = session({
       key: "temporary:temporary-one",
       chatId: "temporary-one",
-      preview: "Private planning",
+      preview: "hi",
     });
     const onSelect = vi.fn();
     const onClose = vi.fn();
@@ -176,11 +176,11 @@ describe("ChatList", () => {
     );
 
     const section = screen.getByRole("region", { name: "Temporary chats" });
-    fireEvent.click(within(section).getByRole("button", { name: "Private planning" }));
+    fireEvent.click(within(section).getByRole("button", { name: "hi" }));
     expect(onSelect).toHaveBeenCalledWith("temporary:temporary-one");
 
     fireEvent.click(within(section).getByRole("button", {
-      name: "Close temporary chat: Private planning",
+      name: "Close temporary chat: hi",
     }));
     expect(onClose).toHaveBeenCalledWith("temporary:temporary-one");
   });