feat(ui): support CTA bar — '♥ at the top to support · follow for what's next'

feat(ui): soft dark restraint redesign — native gr.Radio + accordion + lora toggle

fix: actually use Base transformer when user picks Base

feat(theme): css rules for param info tooltips and custom model selector

fix(theme): preserve gradio's --font / --font-mono css vars

feat(theme): onyx amber palette + gr.themes.Base + glow CSS