* fix(web): add Safari fallback for requestIdleCallback * fix(web): use globalThis in idle-task fallbacks Switch idle-task fallback paths from window.* to globalThis.* so the fallback no longer crashes in environments where window is undefined. Also thread IdleRequestOptions through requestIdleFallback so the caller's timeout hint is honored when falling back. Addresses CodeRabbit review feedback on #9137. --------- Co-authored-by: sriram veeraghanta <[email protected]>