After changing runners_advanced from list[tuple] to list[RunnerAdvancementData],
three locations were still trying to unpack as tuples causing "cannot unpack
non-iterable RunnerAdvancementData object" error on triples/doubles with runners.
Fixed locations:
- app/core/game_engine.py:772 - _apply_play_result() advancement map
- app/core/game_engine.py:1081 - _save_play() finals lookup
- terminal_client/display.py:150 - Runner movement display
Also renamed refactor_overview.md to game-engine-play-tracking-design.md
for clarity and updated the example code to use dataclass access pattern.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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