Closes#148: clear stale signature after each boss fight so subsequent
auto-boss pre-saves don't send a mismatched HMAC.
Closes#151: auto-buy skips non-max-tier adventurers once they reach 100,
keeping gold flowing to the highest-unlocked tier.
Closes#152: introduce computePartyCombatPower() in tick.ts mirroring the
server-side formula (global upgrades, prestige, equipment, set bonuses,
echo, crafted, companion). Resource bar, auto-quest gate, and boss panel
all now use the same multiplier-accurate value.
Closes#146: tick engine auto-unlocks adventurer-specific upgrades when
their adventurer is first recruited; upgrade panel shows a recruit hint
for locked entries with no boss/quest source.
Closes#147: patch functions now detect actual changes before incrementing
the patched counter, preventing inflated sync reports.
Closes#149: computeEssencePerSecond exported from tick engine and shown
in the resource bar dropdown alongside Gold/s.
Closes#150: auto-buy now sorts adventurers by level descending for
semantic clarity, ensuring highest-tier units are purchased first.
