Open Plan

The pair's plan state (ATH-460 Phase 2), derived from its most recent generate_plan job: not_started is plan mode (the home card reads "Generate My Plan" and the opener fires on app entry), in_progress (the card reads "In Progress") and done are not. The one plan signal the frontend reads; the same words the harness package uses. has_planned_sessions is whether the pair has any live planned series, in any week: in plan mode the coach often plans sessions mid-interview, so the empty-week copy reads "partially built" rather than "nothing planned".