fix(cli): restaure la conversation au retour de layout via cache conversationId+sessionId — #217

frontend/src/features/agents/CustomAgentChatView.test.tsx

@@ -522,6 +522,85 @@ describe("CustomAgentChatView", () => {
     expect(screen.getByLabelText(/message CLI custom/).hasAttribute("disabled")).toBe(true);
   });
 
+  it("restores visible conversation from conversationId cache when layout returns before sessionId", async () => {
+    let scrollback: ReplyChunk[] = [
+      { kind: "userPrompt" as const, text: "Initial prompt" },
+      { kind: "final" as const, content: "Initial reply" },
+    ];
+    const secondReattach = deferred<{ sessionId: string; scrollback: ReplyChunk[] }>();
+    const agent = {
+      launchAgentChat: vi.fn(),
+      reattachAgentChat: vi
+        .fn()
+        .mockImplementationOnce(async (sessionId: string) => ({
+          sessionId,
+          scrollback,
+        }))
+        .mockImplementationOnce(() => secondReattach.promise),
+      detachAgentChat: vi.fn(async () => {}),
+      sendAgentChat: vi.fn(async () => {}),
+      cancelAgentChat: vi.fn(async () => {}),
+      closeAgentChat: vi.fn(async () => {}),
+    };
+    const props = {
+      projectId: "project-1",
+      agentId: "agent-1",
+      agentName: "Worker",
+      profile,
+      cwd: "/repo",
+      nodeId: "node-1",
+      sessionId: "chat-session-1" as string | null,
+      conversationId: "conversation-1",
+      onSessionId: vi.fn(),
+      onConversationId: vi.fn(),
+    };
+
+    const first = render(
+      <DIProvider
+        gateways={{
+          agent,
+          system: { pickFile: vi.fn(async () => null) },
+        } as unknown as Gateways}
+      >
+        <CustomAgentChatView {...props} />
+      </DIProvider>,
+    );
+
+    expect(await screen.findByText("Initial reply")).toBeTruthy();
+    first.unmount();
+    await waitFor(() => expect(agent.detachAgentChat).toHaveBeenCalledWith("chat-session-1"));
+
+    scrollback = [
+      { kind: "userPrompt" as const, text: "Initial prompt" },
+      { kind: "final" as const, content: "Initial reply" },
+      { kind: "userPrompt" as const, text: "Question during graph view" },
+      { kind: "final" as const, content: "Answer restored from replay" },
+    ];
+
+    render(
+      <DIProvider
+        gateways={{
+          agent,
+          system: { pickFile: vi.fn(async () => null) },
+        } as unknown as Gateways}
+      >
+        <CustomAgentChatView {...props} sessionId={null} />
+      </DIProvider>,
+    );
+
+    expect(screen.getByText("Initial reply")).toBeTruthy();
+    expect(agent.launchAgentChat).not.toHaveBeenCalled();
+    expect(screen.getByRole("button", { name: "Envoyer" }).hasAttribute("disabled")).toBe(true);
+
+    act(() => {
+      secondReattach.resolve({ sessionId: "chat-session-1", scrollback });
+    });
+
+    expect(await screen.findByText("Answer restored from replay")).toBeTruthy();
+    expect(screen.getByText("Question during graph view")).toBeTruthy();
+    expect(agent.launchAgentChat).not.toHaveBeenCalled();
+  });
+
   it("drops a stale no-response chunk when replay contains a later real answer (#190)", async () => {
     const agent = {
       launchAgentChat: vi.fn(),