refactor(core): move ColorSchemeValueContext to singletons

packages/sanity/src/_singletons/index.ts

@@ -25,3 +25,4 @@ export * from './form/studio/ValidationContext'
 export * from './i18n/LocaleContext'
 export * from './presence/FormFieldPresenceContext'
 export * from './store/_legacy/ResourceCacheContext'
+export * from './studio/ColorSchemeValueContext'

packages/sanity/src/_singletons/studio/ColorSchemeValueContext.ts

@@ -0,0 +1,8 @@
+import {createContext} from 'react'
+import type {StudioThemeColorSchemeKey} from 'sanity'
+
+/**
+ * Used to keep track of the internal value, which can be "system" in addition to "light" and "dark"
+ * @internal
+ */
+export const ColorSchemeValueContext = createContext<StudioThemeColorSchemeKey | null>(null)

packages/sanity/src/core/studio/StudioThemeProvider.tsx

@@ -3,10 +3,11 @@
 import {LayerProvider, ThemeProvider} from '@sanity/ui'
 import {type RootTheme} from '@sanity/ui/theme'
 import {type ReactNode} from 'react'
+import {ColorSchemeValueContext} from 'sanity/_singletons'
 
 import {defaultTheme, type StudioTheme} from '../theme'
 import {useActiveWorkspace} from './activeWorkspaceMatcher'
-import {ColorSchemeSetValueContext, ColorSchemeValueContext} from './colorScheme'
+import {ColorSchemeSetValueContext} from './colorScheme'
 
 interface StudioThemeProviderProps {
   children: ReactNode

packages/sanity/src/core/studio/colorScheme.tsx

@@ -9,16 +9,11 @@ import {
   useMemo,
   useSyncExternalStore,
 } from 'react'
+import {ColorSchemeValueContext} from 'sanity/_singletons'
 
 import {type TFunction} from '../i18n'
 import {type StudioThemeColorSchemeKey} from '../theme/types'
 
-/**
- * Used to keep track of the internal value, which can be "system" in addition to "light" and "dark"
- * @internal
- */
-export const ColorSchemeValueContext = createContext<StudioThemeColorSchemeKey | null>(null)
-
 /**
  * The setter for ColorSchemeValueContext, in a separate context to avoid unnecessary re-renders
  * If set to false then the UI should adjust to reflect that the Studio can't change the color scheme