chore: fix tui test callback narrowing for CI

src/tui/tui-command-handlers.test.ts

@@ -46,7 +46,10 @@ describe("tui command handlers", () => {
     const renderOrders = requestRender.mock.invocationCallOrder;
     expect(renderOrders.some((order) => order > sendingOrder)).toBe(true);
 
-    resolveSend?.({ runId: "r1" });
+    if (!resolveSend) {
+      throw new Error("expected sendChat to be pending");
+    }
+    resolveSend({ runId: "r1" });
     await pending;
     expect(setActivityStatus).toHaveBeenCalledWith("waiting");
   });