Function browser_host_html_with_head 

pub fn browser_host_html_with_head(
    name: &str,
    declared: Option<&str>,
    favicon: Option<&str>,
) -> String

The HTML shell that loads a LOGOS→WASM DOM app, with a page’s own Head: merged over the defaults, carrying the built-in theme — browser_host_html_themed with ShellTheme::Default.