Convert global config maps (initialMirrorAngles, buttonGroups, doorGroups, captorGroups, rotatorButtons) into per-level arrays and add getCurrentLevelConfig(levelConfigs) helper. Update getButtonGroup, getDoorGroup, getCaptorGroup, getRotatorButtonConfig, isMirrorControlledByButton, syncRotatorButtons and initializeMirrorOrientations to pull configs for the current level. Also tweak a couple of level tiles and add a rotator button config for the third level ("3,7": { mirrorX: 7, mirrorY: 7, step: -22.5, intervalMs: 1000 }) while keeping empty objects for levels without overrides. These changes enable per-level customization of mirrors, buttons, doors, captors and rotators.
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