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## What kind of change does this PR introduce? Chore. ## What is the current behaviour? Classic Dark remains available across the shared theme library and several apps. Studio now supports System, Dark, and Light as its theme modes, but still carries compatibility paths for Classic Dark. ## What is the new behaviour? - Removes Classic Dark from shared theme options, application commands, stylesheets, previews, examples, and replay handling. - Deletes the Classic Dark and faux Classic Dark stylesheets. - Removes the now-unused Classic Dark branches from Studio theme colour controls. - Migrates `classic-dark` to `dark` so first rendered frame renders Dark (not Light) | After | | --- | | <img width="1458" height="1778" alt="CleanShot 2026-09-18 at 11 07 40@2x" src="https://github.com/user-attachments/assets/679bf87f-a3c1-4599-ad2f-292d98d0b856" /> | ## To test 1. In Studio, open Account Preferences → Appearance. Confirm the available themes are System, Dark, and Light, and that theme colour controls still work in each resolved mode. 2. Set the `theme` local storage value to `classic-dark`, then reload Studio. Confirm it renders as Dark immediately and the stored value becomes `dark`. 3. Open the theme switcher in Design System, Learn, and UI Library. Confirm Classic Dark is no longer available and Light, Dark, and System still apply correctly. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Changes** * Removed the Classic Dark theme option from theme menus and settings across the application. * Classic Dark selections are automatically migrated to the standard Dark theme. * Updated theme documentation and demonstrations to list only System, Light, and Dark. * Removed Classic Dark styling and preview support; existing Dark, Light, and System themes remain available. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Writing components
Where to create your components
- For components that declare the general structure and layout of a page:
/components/layouts/xxx
- For components that are tightly coupled to a specific interface:
/components/interfaces/xxx
- For components that are meant to be reusable across multiple pages:
/components/ui/xxx
- Note: We're gradually moving files out of the
to-be-cleanedfolder into the respective folders as we refactor
Component structure
- If a component has constants and utility methods that are tightly coupled to itself, keep them close to the component and enclose them in a folder with an
index.tsxas an entry point - Otherwise it can just be a file on its own
- For example:
-
components/ui - SampleComponentA - SampleComponentA.tsx - SampleComponentA.constants.ts - SampleComponentA.utils.ts - SampleComponentA.types.ts - index.ts - SampleComponentB.tsx
-
Template for building components
// Declare the prop types of your component
interface ComponentAProps {
sampleProp: string
}
// Name your component accordingly — use a named export, not a default export
export const ComponentA = ({ sampleProp }: ComponentAProps) => {
return <div>ComponentA: {sampleProp}</div>
}