- SignatureModal with Draw/Type/Use Saved tabs (signature_pad DPR scaling) - POST /api/sign/[token] atomic one-time claim, PDF embed, SHA-256 hash, audit trail - SIGN-04, SIGN-05, LEGAL-01, LEGAL-02 requirements complete
- SignatureModal with Draw/Type/Use Saved tabs (signature_pad DPR scaling) - POST /api/sign/[token] atomic one-time claim, PDF embed, SHA-256 hash, audit trail - SIGN-04, SIGN-05, LEGAL-01, LEGAL-02 requirements complete