Function run_tests_with_launcher 

pub fn run_tests_with_launcher(
    source: &str,
    config: &TestConfig,
    launcher: Option<&dyn RemotePageLauncher>,
) -> Result<RunReport, String>

run_tests, with a live crate::page_host::RemotePageLauncher so a MOUNTED test’s TestConfig::page_tiers can also exercise a Browser candidate — the seam largo test --browser calls through once a real one exists (apps/logicaffeine_cli/src/browser/**). None reports a Browser candidate as tier: refused, never a silent skip.