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Generic createStore(filePath) shared by characters.json/garments.json/ dance-refs.json, same full-read/full-write pattern as library.json. Not yet wired into server.js routes — that's T3-T5.
Generic createStore(filePath) shared by characters.json/garments.json/ dance-refs.json, same full-read/full-write pattern as library.json. Not yet wired into server.js routes — that's T3-T5.
