Text only: data/chess.json keeps both lines (traitOverride.desc = the class trait or the module's rewrite,
moduleDesc = the added line) and the battle unit keeps the class trait with the module on — the same trait
text, targeting and attack shape as 不装备 for every added-line module (圣约送葬人 REA-Y also rewrites it).
New helpers ui/loadoutModel.js traitLines / fullTraitText; traitText (ui/detailPanel.js) composes the two.
Golden unchanged (no sim change). Tests: test/ui/feedback5-module-trait.test.js (new), loadout-stats updated.
