Optimize `executePendingRetry` in `js/channelProfile.js` to run zap attempts in parallel using `Promise.allSettled`, improving performance when retrying multiple shares.
Refactor `splitAndZap` in `js/payments/zapSplit.js` to accept `overrideFee` as an argument, eliminating reliance on a global variable and ensuring thread safety during parallel execution.
Update `js/ui/zapController.js` to use the new `splitAndZap` API.
Co-authored-by: PR0M3TH3AN <[email protected]>
This patch updates `js/payments/zapSplit.js` and `js/payments/nwcClient.js` to replace legacy manual event signing (which relied on `nostr-tools` v1 methods `getEventHash` and `signEvent` that are missing in v2) with the centralized `signEventWithPrivateKey` helper from `js/nostr/publishHelpers.js`. This ensures compatibility with the installed `nostr-tools` version and resolves the error preventing zaps.
