darroyo 4d34c6d31a Replace token-based admin auth with JWT session authentication ...

- Add AdminUser model (bcrypt hashed passwords) and admin_users table
- Add AdminJWTService for HS256 JWT sessions (24h TTL)
- Add AdminSessionAuth middleware for /api/v1/admin/* routes
- Add admin handlers: login, logout, me, change-password, users CRUD
- Keys and model management routes now require admin JWT session
- Remove ADMIN_TOKEN, add ADMIN_USERNAME, ADMIN_PASSWORD env vars
- Update frontend: username/password login, admin_session storage, AdminUsers CRUD view

2026-07-31 17:15:29 -04:00

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Replace token-based admin auth with JWT session authentication

2026-07-31 17:15:29 -04:00