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

frontend/src/features/layout/LayoutGrid.chat.test.tsx

@@ -266,6 +266,71 @@ describe("LayoutGrid custom agent CLI (#147)", () => {
     expect(screen.queryByText(/déjà actif dans une autre cellule/)).toBeNull();
   });
 
+  it("restores a custom CLI transcript when returning with a conversation id but no session (#217)", async () => {
+    const layout = new MockLayoutGateway();
+    const agent = new MockAgentGateway();
+    const profileGateway = new MockProfileGateway();
+    const terminal = new MockTerminalGateway();
+    const system = new MockSystemGateway();
+    await profileGateway.configureProfiles([structuredProfile]);
+    const created = await agent.createAgent("p1", {
+      name: "Worker",
+      profileId: structuredProfile.id,
+    });
+    const tree = await layout.loadLayout("p1");
+    const leafId = leaves(tree)[0].id;
+    await layout.mutateLayout("p1", {
+      type: "setCellAgent",
+      target: leafId,
+      agent: created.id,
+    });
+    await layout.mutateLayout("p1", {
+      type: "setCellConversation",
+      target: leafId,
+      conversationId: "conversation-known",
+    });
+    window.localStorage.setItem(`idea.agent-cell-mode.p1.${leafId}`, "custom");
+    const launchChat = vi.spyOn(agent, "launchAgentChat").mockResolvedValue({
+      sessionId: "chat-resumed",
+      cellKind: "chat" as const,
+    });
+    const reattachChat = vi.spyOn(agent, "reattachAgentChat").mockResolvedValue({
+      sessionId: "chat-resumed",
+      scrollback: [
+        { kind: "userPrompt", text: "known prompt" },
+        { kind: "final", content: "known answer" },
+      ],
+    });
+
+    renderGrid({
+      layout,
+      agent,
+      profile: profileGateway,
+      terminal,
+      system,
+    } as unknown as Gateways);
+
+    expect(await screen.findByText("known answer")).toBeTruthy();
+    expect(screen.getByText("known prompt")).toBeTruthy();
+    expect(launchChat).toHaveBeenCalledWith(
+      "p1",
+      created.id,
+      expect.objectContaining({
+        nodeId: leafId,
+        conversationId: "conversation-known",
+      }),
+    );
+    expect(reattachChat).toHaveBeenCalledWith("chat-resumed", expect.any(Function));
+    await waitFor(async () => {
+      const updated = await layout.loadLayout("p1");
+      const leaf = leaves(updated)[0];
+      expect(leaf.conversationId).toBe("conversation-known");
+      expect(leaf.session).toBe("chat-resumed");
+    });
+    expect(screen.queryByText("Envoyez un message pour démarrer la conversation structurée."))
+      .toBeNull();
+  });
+
   it("relaunches a stopped custom CLI agent from scratch (#197)", async () => {
     const layout = new MockLayoutGateway();
     const agent = new MockAgentGateway();