Land PR #15 surgical fixes (Windows safety + human-play hints)

Paper-experiment prep: human-study harness + pass^k + paper plan

Persist human Play-tab runs in the standard Playback format

Phase 2: fix Start button + tactical minimap (shapes/legend/counts)

Phase 2: Play tab — show objective, units panel, sharper minimap

Phase 2: InteractiveSession — turn-steppable backend for GUI play

Phase 2: human-labeling machine core