Release WATTx v0.1.7.7 — pool mining in the wallet + payout fixes · WATTxChain/WATTx

WATTx Core v0.1.7.7

All nodes and pools should upgrade — this release tightens consensus.

x25x: algorithms whose proof of work cannot be verified from a block header (equihash, ghostrider) were hashed as SHA256D, so a block could declare EQUIHASH and be accepted on double-SHA256 work while paying equihash's difficulty. They are now unmineable rather than mineable with the wrong algorithm's work.

A miner whose login carried no +WTX_ADDRESS was silently credited to the pool's own wallet. The payout address now comes from the login, a bare WATTx address, or the password — and the login is refused if none is usable.
XMRig's object-form login and submit are parsed correctly (the array parser previously read the nested algo list and dropped every RandomX miner's address).
Reward weighting uses rolling 10-minute share windows instead of lifetime counters, so payouts follow current work, not uptime. Payout-set changes rebuild jobs immediately so a new miner's first blocks pay them.

Pool mining works for real. The Mining tab's Pool mode is a full XMRig-protocol stratum client wired to the built-in RandomX miner, paying out to the wallet's own mining address. It defaults to the public pool at stratum+tcp://pools.wattxchange.app:3333. (The old Pool option silently mined solo.)
Update notifications. The wallet checks for newer releases (Help → Check for Updates, plus a daily background check governed by the existing option) and offers this download page. Windows builds open the releases page directly.
GUI miner fixes: the miner uses the thread count the UI shows, block templates rebuild per algorithm, and RandomX verifies with the genesis key.