[ALF] Theme & palette cleanup (#4769)

* Invert primary scale

* Invert negative palette

* Replace theme specific styles in Toggle

* Remove theme specific colors from Button, improves secondary solid on dark mode

* TextField

* Remove from MessageItem

* Threadgate editor

* IconCircle

* Muted words

* Generate themes from hues

* Cleanup

* Deprecate more values, fix circular import

* Invert positive too, hardly use

* Button tweaks, some theme diffs

* Match disabled state for negative button

* Fix unread noty bg

src/alf/util/colorGeneration.ts

@@ -15,3 +15,7 @@ export function generateScale(start: number, end: number) {
     return start + range * stop
   })
 }
+
+export const defaultScale = generateScale(6, 100)
+// dim shifted 6% lighter
+export const dimScale = generateScale(12, 100)

src/alf/util/themeSelector.ts

@@ -1,4 +1,4 @@
-import {ThemeName} from '#/alf/themes'
+import {ThemeName} from '#/alf/types'
 
 export function select<T>(name: ThemeName, options: Record<ThemeName, T>) {
   switch (name) {

src/alf/util/useColorModeTheme.ts

@@ -4,7 +4,8 @@ import * as SystemUI from 'expo-system-ui'
 
 import {isWeb} from 'platform/detection'
 import {useThemePrefs} from 'state/shell'
-import {dark, dim, light, ThemeName} from '#/alf/themes'
+import {dark, dim, light} from '#/alf/themes'
+import {ThemeName} from '#/alf/types'
 
 export function useColorModeTheme(): ThemeName {
   const theme = useThemeName()