Dorian 2bfc36baa0 fix: restrict CORS to same-origin with explicit origin validation
Replace blanket cors_origin() with validate_origin() that checks the
incoming Origin header against allowed origins (host IP + dev server).
Unknown origins no longer receive Access-Control-Allow-Origin headers.
Also added X-CSRF-Token to allowed CORS headers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-11 00:53:51 +00:00
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