## ADDED Requirements

### Requirement: Error pages prominently display status code
The system SHALL show prominent HTTP status code display on 404 and 500 pages.

#### Scenario: 404 rendering
- **WHEN** user visits a non-existent route
- **THEN** the page prominently displays `404`

#### Scenario: 500 rendering
- **WHEN** an internal server error page is rendered
- **THEN** the page prominently displays `500`

### Requirement: Error pages include safe playful AI-style messaging
The system SHALL render an "Oh no!" style playful message that is safe and policy-compliant.

#### Scenario: Safe message selection
- **WHEN** an error page is displayed
- **THEN** a playful message is selected from a curated safe message set
- **AND** message excludes profanity and discriminatory/abusive content
