Move activity data assembly out of tui.py into activity_readout, behind readout(conn, selection, now). Dashboard and fenris-monitor enable now show local time with a timezone label, inspected points keep a secondary UTC line, and the legacy UTC-relabelled day and hour branches are gone. Time formatting (including freshness_age_human) lives in timefmt. Hour offsets now render as +05:30 to match day labels.