Implementing Zustand Slice Pattern for Scalable E-commerce Architecture

Act as a React State Architecture Lead. Develop a highly modular, decoupled state management architecture leveraging Zustand's advanced 'slice pattern'. You must independently architect distinct, isolated slices for [FEATURE_SLICES] (e.g., `createUserSlice`, `createCartSlice`, `createProductSlice`) and technically demonstrate how to securely bind them together into a singular, monolithic [ROOT_STORE_NAME]. Explicitly demonstrate the advanced `get()` and `set()` parameters required to manage complex cross-slice dependencies (e.g., the Cart slice clearing itself when the User slice logs out) without inducing fatal circular reference errors. Provide a rigorous automated testing strategy utilizing [DEPENDENCY_INJECTION_MOCKS] to validate these slices in absolute isolation. Focus intensely on Clean Architecture principles.