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frame-ancestors is ignored inside a <meta> CSP, so move clickjacking protection to real response headers (X-Frame-Options: DENY) and add X-Content-Type-Options: nosniff and Referrer-Policy: no-referrer on all responses. Drop the ineffective frame-ancestors token from the meta CSP. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>