合并(CI追绿·run23): refresh裁剪步python→python3

tools/golden_baseline_refresh.sh

@@ -73,7 +73,7 @@ if [ ! -s "$TMP/shots/board_meta.json" ] || ! grep -q "PASS — 三关双帧取
 	echo "[golden_refresh] FAIL — board meta 缺失或探针自检红（st=$st，见上）"
 	exit 1
 fi
-python tools/golden_board_crop.py "$TMP/shots/board_meta.json" "$TMP/shots" "$TMP/crop" || exit 1
+python3 tools/golden_board_crop.py "$TMP/shots/board_meta.json" "$TMP/shots" "$TMP/crop" || exit 1
 mkdir -p "$REPO/game/tests/golden/$PLAT"
 for b in board_L1_dungeon.png board_L2_underdark.png board_L3_deep_underdark.png; do
 	cp "$TMP/crop/$b" "$REPO/game/tests/golden/$PLAT/$b" || exit 1