Review Queue: show pace alongside distance/duration/HR, sort by activity
date (most recent first) instead of classification timestamp, and add a
filter by workout kind with a special "Unsorted" option for runs where
the rule engine found zero candidates at all (distinct from ambiguous
multi-candidate runs).
Profile: remove the phase-detection warm-up/cool-down section from the
UI -- not used by anything yet (phase segmentation is future work) and
was adding noise. The underlying fields are untouched so no data is lost
and the settings screen still round-trips them on save.
