56 takes phase members off the Board view (counts describe what is
visible; membership is the only thing hiding them, so done, archived or
an edited list gives them back). 57 draws them instead: a Phases view,
one swimlane per phase, the phase log under it, run-again where the halt
is. 58 refuses to move a phase card while a member has a live agent —
'hold the phase first' — and covers archive, which is the path that
would really have hurt. 59 sweeps merged members to done/ when the phase
merges, so an ending reads as an ending.