머니페니 98a161574e security: migrate JWT from localStorage to httpOnly cookie
Eliminates XSS token theft by storing JWT in httpOnly Secure cookie
instead of localStorage. Backend sets cookie on login and clears on
logout. Token extraction uses cookie-first with Authorization header
fallback for backward compatibility with existing tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-18 22:30:47 +09:00
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