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The previous approach used windows::core::implement to manually implement ICoreWebView2PermissionRequestedEventHandler_Impl, but the sealed IUnknownImpl constraint in webview2-com prevents external #[implement] usage — you must use the crate's own pre-built handler types. Replace with PermissionRequestedEventHandler::create() which wraps the closure and handles COM ref-counting internally. Also removes the now- unused windows = "0.61" direct dependency. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>