15 lines
655 B
Markdown
15 lines
655 B
Markdown
## ADDED Requirements
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### Requirement: Header provides icon-based theme switcher
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The system SHALL display a theme switcher in the top-right header area with icon controls for system, light, dark, and high-contrast modes.
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#### Scenario: Theme options visible as icons
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- **WHEN** a user views the header
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- **THEN** all four theme options are represented by distinct icons
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- **AND** each option is keyboard-accessible and screen-reader labeled
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#### Scenario: Theme selection applies immediately
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- **WHEN** a user selects a theme option
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- **THEN** the page updates visual theme without full page reload
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- **AND** selected option has a visible active state
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