Locally served, separate and replaceable third-party libraries:
qrcode-generator 2.0.4, Kazuhiko Arase, MIT.
https://github.com/kazuhikoarase/qrcode-generator
diff 9.0.0, jsdiff contributors, BSD-3-Clause.
https://github.com/kpdecker/jsdiff
heic-to 1.6.6, Hopper Gee, LGPL-3.0.
https://github.com/hoppergee/heic-to/tree/v1.6.6
Unmodified next/heic-to.js served as heic/heic-to.mjs.
Build instructions: heic/BUILD.md. License: heic/LICENSE.
Upstream libheif 1.23.6 / libde265 1.0.16:
https://github.com/strukturag/libheif/tree/v1.23.6
https://github.com/strukturag/libde265/tree/v1.0.16

jsQR 1.4.0, Cozmo contributors, Apache-2.0.
https://github.com/cozmo/jsQR
Unmodified dist/jsQR.js, used by the local scan-check worker.