Adds hundreds of unit/integration/e2e tests, fixes WS bcrypt auth, config merge, fleet analytics, agent schedule/log tail, and documents stale PROBLEMS items. Updates PROBLEMS.md, README, and test scripts; ignores local spread-kits and coverage dirs.
Dark UI with hashrate graphs, inline setting help, percent-based threads/RAM, configurable process name and display modes, and LAN-aware run.bat startup banner.
