refactor: update UI to Apple-inspired aesthetic with system fonts and dark mode support

refactor: remove Prompt Enhancer support and update UI layout and styling

feat: reorder decorators and add prompt logging to generate_image endpoint

feat: serve homepage using HTMLResponse for proper content-type handling

refactor: move spaces import to top-level to ensure correct initialization

feat: enable HF_TRANSFER, improve model loading logs, and increase GPU duration to 120s

feat: implement ERNIE-Image-Turbo pipeline with a custom Gradio-based web interface

initial commit