Hide Windows filesystem helper console windows (#32849)

## What changed

- Add a console mode to the Windows sandbox process launcher.
- Launch `--codex-run-as-fs-helper` subprocesses with `CREATE_NO_WINDOW`.
- Preserve inherited-console behavior for regular sandboxed commands.

GitOrigin-RevId: 927be36b82903b6a5fb1a243ba7f406f9ed85f3f

codex-rs/windows-sandbox-rs/src/unified_exec/backends/legacy.rs

@@ -4,6 +4,7 @@ use crate::conpty::spawn_conpty_process_as_user;
 use crate::desktop::LaunchDesktop;
 use crate::logging::log_failure;
 use crate::logging::log_success;
+use crate::process::ConsoleMode;
 use crate::process::StderrMode;
 use crate::process::StdinMode;
 use crate::process::read_handle_loop;
@@ -98,6 +99,7 @@ fn spawn_legacy_process(
                 StdinMode::Closed
             },
             StderrMode::Separate,
+            ConsoleMode::Inherit,
             use_private_desktop,
             logs_base_dir,
         )?;