rename template to sulphur_silver.html and translate UI helper texts to English

add Prompt Relay Generation Mode dropdown (nsfw/sfw/general) to Sulphur AI Vision Engine

convert UI tabs into stacked vertical accordions from top to bottom

refactor UI into 2 sub-tabs for Sulphur & VIP RIFE, and set video merge to manual mode

update VIP access contact label to Inbox Me

add VIP access contact email dayonaart@gmail.com to header and VIP suite

bind prompt relay duration to main generator duration slider and increase RIFE timeout to 120s

limit VIP RIFE multiplier to max 4x (32/64 FPS)

fix BLIP describe image return statement in prompt_enhancer.py

refactor ui.py into modular ui_modules package for high maintainability