## MODIFIED Requirements

### Requirement: Footer exposes policy navigation links
The system SHALL display footer links for Terms of Use and Attribution on the landing page.

#### Scenario: Footer links visible on landing page
- **WHEN** a user loads the main page
- **THEN** the footer includes links labeled "Terms of Use" and "Attribution"
- **AND** links are visually distinguishable and keyboard focusable

#### Scenario: Footer links navigate correctly
- **WHEN** a user activates either policy link
- **THEN** the browser navigates to the corresponding policy page
- **AND** navigation succeeds without API dependency

#### Scenario: Footer includes back-to-top action
- **WHEN** a user reaches lower sections of the page
- **THEN** footer exposes a "Back to Top" control
- **AND** activating it returns viewport to page top smoothly

#### Scenario: Footer includes optional GitHub and email links
- **WHEN** GitHub repository URL and/or contact email are configured
- **THEN** footer renders corresponding links without replacing policy links
- **AND** absent values do not break footer layout