fix: CSS via gr.HTML style tag, background as div, no CSS variables

feat: two-screen layout with gr.render, background, favicon, editor fix

fix: remove all gr.Column/gr.Group outputs, add favicon

fix: single-page layout, no gr.Column/Group output components

fix: gr.Group -> gr.Column for valid outputs, remove Player Sheet tab

refactor: pure text UI, fix slot switching, remove all SVG icons

feat: slot stats preview, dynamic background, centered icons, compact lang

fix: slot grid buttons, vertical layout, dark theme for dropdowns/containers

fix: UI polish — tab visibility, clickable slot cards, dark theme consistency

feat: save slot isolation + character creation flow