fix: 延迟支付宝 canvas 首帧渲染#351
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This pull request introduces lifecycle management to prevent memory leaks and errors in asynchronous callbacks after a component is unmounted. It adds a destroyed flag, handles animation frame cancellation in didUnmount, and includes checks for the destroyed state before canvas operations. The reviewer suggested explicitly nullifying the nativeCanvas reference during unmount to improve garbage collection and adding a guard check before setting the native canvas reference in the asynchronous selector callback to ensure the component is still mounted.
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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