fix(domain,application,infrastructure,backend,app-tauri,frontend): Stop demande agent préserve la conversation ouverte — arrêt sans fermeture/clôture du chat, états cohérents après cancel sur les 3 adapters de session, cellule et workstate synchronisés — #343 (QA verte)

frontend/src/adapters/http/agentGateway.test.ts

@@ -308,11 +308,16 @@ describe("HttpAgentGateway WS round-trip (B6 frames)", () => {
         baseUrl: "https://host",
         fetchImpl: async (url, init) => {
           calls.push({ url, init });
+          const command = JSON.parse((init as { body: string }).body).command;
+          const response =
+            command === "cancel_agent_chat"
+              ? { sessionId: "chat-1", outcome: "cancelled" }
+              : undefined;
           return {
             ok: true,
             status: 200,
-            json: async () => undefined,
-            text: async () => "",
+            json: async () => response,
+            text: async () => response ? JSON.stringify(response) : "",
           };
         },
       }),
@@ -402,7 +407,10 @@ describe("HttpAgentGateway WS round-trip (B6 frames)", () => {
     });
     expect(chunks).toEqual([{ kind: "final", content: "Hello back" }]);
 
-    await gw.cancelAgentChat("chat-1");
+    await expect(gw.cancelAgentChat("chat-1")).resolves.toEqual({
+      sessionId: "chat-1",
+      outcome: "cancelled",
+    });
     await gw.closeAgentChat("chat-1");
     await gw.detachAgentChat("chat-1");