## ADDED Requirements

### Requirement: Account registration
The system SHALL allow a new owner to register with a unique email address and a password. The password SHALL be stored only as a salted hash.

#### Scenario: Successful registration
- **WHEN** a visitor submits a new email and password on the register page
- **THEN** an account is created and the visitor is logged in

#### Scenario: Duplicate email
- **WHEN** a visitor registers with an email that already exists
- **THEN** registration is rejected with an error message

### Requirement: Login and logout
The system SHALL allow an owner to log in with email and password and to log out, maintaining an authenticated session via a signed session cookie.

#### Scenario: Successful login
- **WHEN** an owner submits the correct email and password
- **THEN** a session cookie is set and the owner is authenticated

#### Scenario: Incorrect password
- **WHEN** an owner submits a wrong password
- **THEN** login is rejected with an error message and no session is created

#### Scenario: Logout
- **WHEN** an authenticated owner clicks logout
- **THEN** the session is destroyed and the owner is redirected to the home page

### Requirement: Session-protected routes
Routes that manage tags SHALL require an authenticated session and redirect unauthenticated visitors to the login page.

#### Scenario: Unauthenticated access to account
- **WHEN** a visitor who is not logged in opens the account page
- **THEN** they are redirected to the login page
