Create a wireframe for integrating a new feature, [FeatureName], into the existing product design of [ProductName]. Ensure that the wireframe clearly showcases the key user flows, with annotations specifying interactions, user inputs, and expected outputs. Consider the integration of any potential third-party APIs or data sources, and include a section for user feedback during prototype testing. Provide a detailed legend or key for each wireframe element, such as buttons, input fields, and navigation components. Output the wireframe in a clear, professional format ready for stakeholder review.