Design a multimodal AI shopping assistant for an e-commerce app

Focus on identifying the key user needs and pain points in the e-commerce shopping experience. Consider how a multimodal AI assistant can enhance user interaction through various inputs like voice, text, and visual recognition. Outline the core functionalities, such as personalized recommendations, real-time assistance, and seamless integration with existing app features. Think about the user journey and how the assistant can provide value at different stages, from product discovery to post-purchase support. Finally, address potential challenges in implementation, such as data privacy and user trust, and propose solutions to mitigate these issues.