Train: short-form post-session feedback with expand (F13)

Post-session feedback is longer than associates will read. Restructure to lead with score, single highest-impact behaviour, one concrete example, with full detail behind an expand. Sixty percent of staff at one multi-unit work 8 to 12 hours a week. Build alongside the named coach idea. Not in Aug 22 build. Source: pilot production testing, Aug 11 2026.