root 459a7749c9 fix(auth): constant-time owner-token comparison ...

Owner bearer token was compared with === / !==, which short-circuits on the
first differing byte and leaks token length+prefix via response timing
(security-sweep-2026-06-01.md). New timingSafeStrEqual (crypto.timingSafeEqual
with a length pre-check so it never throws on length mismatch); wired into both
owner.js and agent_auth.js.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-01 23:26:46 +10:00

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