Method open_pdf_with_system_viewer

crates/learnerd/src/tui/state.rs:465–467

(&self, path: &str)

  /// Opens a PDF file using the Windows system viewer.
  #[cfg(target_os = "windows")]
  fn open_pdf_with_system_viewer(&self, path: &str) {
    let _ = std::process::Command::new("cmd").args(["/C", "start", "", path]).spawn();
  }

  /// Opens a PDF file using the macOS system viewer.
  #[cfg(target_os = "macos")]