The link both projects wrote twice

dev-updater serves APKs to a phone and ai-app runs model sessions for
one. Above the waterline they share nothing. Underneath they are the
same program: bound to wg0 so they are not on the LAN, presenting a
certificate from a CA the app pins, answering only requests carrying a
token enrolled by scanning a QR off the terminal, keeping state in
owner-only files outside the repo.

Three modules, each extracted only after diffing the two copies and
finding nothing between them but a product name and a type parameter.
netif fails closed when the tunnel is down. enroll generates, stores and
compares the token, and prints the QR, with the URI scheme as the one
per-project part. private owns the file modes, taken from ai-app's
version because it had already factored out what dev-updater still has
inline in two places.

Nothing is removed from either project. This is a proposal with a
working core, and the README carries the measured evidence -- the
enrollment scanner activity differs by its package line and nothing
else, the RON format module is byte-identical, and the two copies have
each drifted into holding an improvement the other lacks, which is the
cost being paid today.

.gitignore

@@ -0,0 +1 @@
+server/target/