I possess intermediate experience in using AI-powered tools in web development as i have long been familiar with using tools like github, figma, chatgpt for code generation and debugging and can give clear instructions to such AI-tools to give me the desired result. I have also used OpenAI and Google Cloud AI APIs and have deisgned systems that handles with authentication and error cases (A face recognition program was a past project of mine). Lastly I understand how to clean, preprocess and pass structured data (JSON, DB queries) to AI models and have basic ML Knowlege.

In such a case i would begin with working on it's usability. "If a user can't figure out how to use it, the beauty won't matter", Thus i use research it's users, provide an intuitive and logical design making navigation predictable and implement a prior low fidelity sketch that focuses on the layout without getting the users distracted by it's design.

Then I would move on to it's visual appeal and improve it's consistency (button sizes and styles, spacing, colours), then remove unnecessary elements encouraging minimalism and use high quality visuals for it's design.

Last steps involve blending both step 1 and 2 together and getting it to harmonize after which it would undergo testing and further documentation.

That concludes how I would approach designing such a web app