Fixed PHASED regeneration with regen-only-modified enabled so it restores only the tracked modified blocks instead of walking the entire arena after progress reaches 100%.
Fixed live progress ETA text showing estimating at 100%; completed progress now displays 0s.
Fixed stale modified-block tracking after successful standard restores so later modified-only runs are not polluted by already-restored blocks.
Fixed per-arena regeneration mode handling so backend selection uses the arena's resolved mode instead of falling back to the global config.yml mode.