Sora39831 5f83415e95 feat: add user registration with role-based access ... - Add Role field to User model (admin/user) with uniqueIndex on Username - Add POST /register endpoint with optional Cloudflare Turnstile verification - Add RegisterUser service with bcrypt password hashing and duplicate detection - Set default admin user role to "admin", new registrations get "user" - Add turnstileSecretKey setting and GetTurnstileSecretKey getter - Add i18n keys (userExists, errorRegister) to all 13 translation files		2026-04-02 23:49:30 +08:00
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model.go	feat: add user registration with role-based access	2026-04-02 23:49:30 +08:00