27 lines
1.4 KiB
Markdown
27 lines
1.4 KiB
Markdown
## ADDED Requirements
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### Requirement: User can switch between light and dark themes
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The system SHALL allow the user to toggle between light and dark themes with a persistent preference.
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#### Scenario: User toggles dark mode on
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- **WHEN** the user activates the theme toggle while the app is in light mode
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- **THEN** the system applies the dark theme and saves the preference for future visits
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#### Scenario: User toggles dark mode off
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- **WHEN** the user activates the theme toggle while the app is in dark mode
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- **THEN** the system applies the light theme and saves the preference for future visits
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### Requirement: Theme preference respects system defaults on first visit
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The system SHALL use the user's system color scheme preference when no saved preference exists.
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#### Scenario: No stored preference uses system theme
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- **WHEN** the user opens the app for the first time without a saved theme preference
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- **THEN** the system applies dark mode when the operating system prefers dark color schemes and light mode otherwise
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### Requirement: Theme selection loads without a flash of the wrong theme
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The system SHALL initialize the theme before the first visible paint so the page does not briefly render in the wrong theme.
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#### Scenario: Initial paint matches saved theme
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- **WHEN** the app loads and a saved theme preference exists
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- **THEN** the document theme is applied before the page content is visibly rendered
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