Function file_url_for_export_html

src/apps/desktop/src/api/miniapp_export_api.rs:45–62

Write slide HTML to app cache and return a `file://` URL for the export webview.

(
    app: &AppHandle<R>,
    html: &str,
)

/// Write slide HTML to app cache and return a `file://` URL for the export webview.
fn file_url_for_export_html<R: tauri::Runtime>(
    app: &AppHandle<R>,
    html: &str,
) -> Result<(tauri::Url, PathBuf), String> {
    let cache_dir = app
        .path()
        .app_cache_dir()
        .map_err(|error| format!("Failed to resolve app cache dir: {error}"))?;
    let export_dir = cache_dir.join("miniapp-slide-export");
    std::fs::create_dir_all(&export_dir)
        .map_err(|error| format!("Failed to create export cache dir: {error}"))?;
    let file_path = export_dir.join(format!("slide-{}.html", Uuid::new_v4()));
    std::fs::write(&file_path, html)
        .map_err(|error| format!("Failed to write export HTML: {error}"))?;
    let url = tauri::Url::from_file_path(&file_path)
        .map_err(|_| "Failed to build file URL for export webview".to_string())?;
    Ok((url, file_path))
}

fn ensure_export_host_window<R: tauri::Runtime>(
    app: &AppHandle<R>,