- IHeroStateSave.attribute becomes IHeroAttributeSave<THero>; top-level modifiers removed
- HeroState.attribute is readonly and loadState delegates to attribute.loadState (never reassigns)
- delete attachAttribute from IHeroState and HeroState, and its only test case
- thin-delegate registerModifier/createModifier/createAndInsertModifier to the attribute registry
- loadEquipEffect mounts equipment modifiers with save=false so equipment bonuses only return via re-equip
- add #06-17-1 regressions: same attribute instance, bonuses kept, no double-count when type is registered
- saveState returns new Map(this.equips) and [...this.slots] so the snapshot is decoupled from the live state
- un-skip the independent-snapshot and container round-trip cases
- loadNoCompression reads value entries from state.value instead of state.percentage
- loadDiff seeds this.value/this.percentage from the item.equip base definition before applying save diffs
- un-skip the four correct-expectation EquipmentState round-trip cases (Low/High percentage, NoCompression value, compressed unchanged value)