Update tests for current tool call and app-server event types (#35942)

## What changed

- Set `encrypted_function_args` when constructing the router test's local tool call.
- Box the TUI test's app-server request payload to match `AppServerEvent::ServerRequest`.

GitOrigin-RevId: 45195f362bc912d202d95ea67271bcb102bf1e2a

codex-rs/core/src/tools/router_tests.rs

@@ -165,6 +165,7 @@ async fn parallel_support_does_not_match_namespaced_local_tool_names() -> anyhow
             payload: ToolPayload::Function {
                 arguments: "{}".to_string(),
             },
+            encrypted_function_args: None,
         }),
         None
     );