This is the browser-facing part of the project. The iframe route has been retired because iPhone Safari would not reliably transform cross-origin pages.
Camera + reference test: working with the calibrated Deutan LUT.
Arbitrary Safari webpages: not yet full-color transformed. Doing that reliably on iPhone requires a proper Safari extension/app rather than another iframe trick.
This installs a small control surface on ordinary pages and preserves the direction for the eventual Safari extension.