feat: harden ai onboarding and approval chat flows

tests/dispatch-plan-confirmation.test.ts

@@ -187,6 +187,7 @@ test("POST /api/v1/projects/[projectId]/dispatch-plans/[planId]/confirm confirms
     ok: boolean;
     plan: { planId: string; status: string; confirmedTargetProjectIds: string[] };
     executions: Array<{ planId: string; targetProjectId: string; status: string }>;
+    notice: { kind: string; body: string } | null;
   };
   assert.equal(payload.ok, true);
   assert.equal(payload.plan.planId, dispatchPlan.planId);
@@ -196,6 +197,9 @@ test("POST /api/v1/projects/[projectId]/dispatch-plans/[planId]/confirm confirms
   assert.equal(payload.executions[0]?.planId, dispatchPlan.planId);
   assert.equal(payload.executions[0]?.targetProjectId, approvedTargetProjectId);
   assert.equal(payload.executions[0]?.status, "queued");
+  assert.ok(payload.notice, "expected a confirmation notice in the response");
+  assert.equal(payload.notice?.kind, "system_notice");
+  assert.equal(payload.notice?.body, "已确认下发到 1 个线程：《北区试产线回归》。");
 
   const nextState = await readState();
   const notice = nextState.projects
@@ -280,6 +284,7 @@ test("rejecting a dispatch plan marks approval_required groups as rejected and w
   assert.equal(payload.plan.planId, dispatchPlan.planId);
   assert.equal(payload.plan.status, "rejected");
   assert.equal(payload.notice.kind, "system_notice");
+  assert.equal(payload.notice.body, "已拒绝主 Agent 推荐，本次不会下发到任何线程。");
 
   const nextState = await readState();
   const nextGroupProject = nextState.projects.find((project) => project.id === groupProject.id);

tests/group-message-dispatch-plan.test.ts

@@ -270,6 +270,14 @@ test("POST /api/v1/projects/[projectId]/messages marks approval_required groups
   const persistedGroup = nextState.projects.find((project) => project.id === groupProject.id);
   assert.ok(persistedGroup, "expected group project to persist");
   assert.equal(persistedGroup?.approvalState, "pending_user");
+  const pendingNotice = persistedGroup?.messages.find(
+    (message) =>
+      message.sender === "master" &&
+      message.kind === "system_notice" &&
+      message.body.includes("等待你确认"),
+  );
+  assert.ok(pendingNotice, "expected an approval notice to be persisted in the group ledger");
+  assert.match(pendingNotice?.body ?? "", /等待你确认|待审批|待确认/);
 });
 
 test("POST /api/v1/projects/[projectId]/messages keeps message success when group dispatch recommendation fails", async () => {