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Agent Notes

Tauri 2 WebView Window Creation On Windows

  • Do not create a WebviewWindowBuilder from a synchronous Tauri command on Windows. In this repo, opening the Token Usage window from a sync #[tauri::command] produced a native window shell, but the WebView content stayed white, the close button did not work reliably, and DevTools could not be opened.
  • Use an async fn command for window creation instead. The working fix was changing show_token_usage_window from a synchronous command to pub(crate) async fn show_token_usage_window(...) -> Result<(), String>.
  • If adding a new Tauri window label, also add it to apps/desktop/src-tauri/capabilities/default.json. For Token Usage, the label is token-usage.
  • Prefer hash routing for single-page subwindows loaded from packaged assets, for example WebviewUrl::App("index.html#token-usage".into()), and keep the frontend route parser compatible with both query and hash routes.
  • For auxiliary windows that previously got stuck, add a Rust-side close fallback in on_window_event that destroys the specific window label instead of hiding the main app.