Not part of the cable-sizing proposal. next.config.mjs allowedDevOrigins
was scoped to the project owners own network; without cj-ki (192.168.0.133)
listed, Next.js 16 rejects the client HMR WebSocket handshake from this
host and the client-rendered pages (e.g. the circuit tree editor) hang on
their loading state forever, even though plain HTTP/API requests work
fine. Same root cause already documented for the sibling elt-planung-suite
project. Should not be carried over if this branch is proposed upstream.
