Perform a comprehensive heuristic evaluation of a hypothetical text-to-image generation interface. The interface features a prompt input bar, a negative prompt toggle, aspect ratio selectors, and a gallery of 4 generated variations per request. Evaluate the interface against: 1. Jakob Nielsen's 10 Usability Heuristics (identify specific violations or successes). 2. AI-specific UX challenges such as 'prompt engineering' friction, expectation management, and the paradox of choice. For each issue found, provide: - The severity rating (0-4). - The heuristic violated. - A specific recommendation for improvement that balances power-user functionality with discoverability for novices.