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- /setup Server Component + SetupClient form + createFirstAdmin Server Action: zero-users guard (TOCTOU-safe), argon2 hash, ADMIN user creation, redirects to /auth/signin after setup - scripts/setup-admin.mjs: CLI alternative for headless/container setups - docs/installation.md: 7-section install guide (clone → configure → run → verify) Co-Authored-By: claude-flow <ruv@ruv.net>