Test protocol: Commit an unchanged set = should be 1 tap. Adjust weight +2.5 then commit = 3 taps(tap KG → tap + → tap ✓). Tap PREV to copy last session's values. Watch the loop timer at the top — the finish-set → commit → rest-timer loop should stay under 3s. Run 4 fake sets in Mode A, reset metrics, then repeat in Mode B.