The LND wallet UI (served on its own app port) fetches /lnd-connect-info
and /proxy/lnd/* cross-origin, so both need correct CORS headers.
(a) Older nginx configs add their own Access-Control-Allow-Origin in the
/lnd-connect-info location on top of the one the backend sets, yielding
a DUPLICATE header that browsers reject ("multiple values"). bootstrap
now strips that redundant nginx add_header (backend owns CORS).
(b) /proxy/lnd/* returned a 401 with no CORS headers when the session
check failed, so the browser saw an opaque CORS error instead of a
readable 401. Add unauthorized_cors() and use it on that path.
Adds tests/production-quality/ (bug tracker + lnd-cors-test.sh harness).
Verified: harness 4/4 on .116, .198, .103.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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