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00f0383867
Save game_state.json on app exit and on pause open so players can resume interrupted sessions. Delete the file on win, loss, or new-game start. Restore the saved game on launch if it exists and isn't won. - solitaire_core: add pile_map_serde module so HashMap<PileType,Pile> round-trips through JSON (serialized as Vec of pairs) - solitaire_data: add game_state_file_path, load_game_state_from, save_game_state_to, delete_game_state_at with 8 new unit tests - solitaire_engine/GamePlugin: restore saved game on startup, expose GameStatePath resource, save on AppExit, delete on new-game and win - solitaire_engine/PausePlugin: save on pause open (guards against OS-level kills while the overlay is showing) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>