[Refactor] decouple settingsMachine from React (#5142)

* Remove unnecessary console.log

* Create a global appMachine

* Strip authMachine of side-effects

* Replace react-bound authMachine use with XState actor use

* Fix import goof

* Register auth commands directly!

* Don't provide anything to settingsMachine from React

* Remove unecessary async

* Make it possible to load project settings via a sent event, without React

* Make settingsMachine ready to be an actor

* Remove settingsLoader use

* Replace all useSettingsAuthContext use with direct actor use

* Add logic to clear project settings, fmt

* fmt

* Clear and load project settings from routeLoaders, but using actor

* Remove useRefreshSettings

* Restore use of useToken() that wasn't working for some reason

* Migrate useFileSystemWatcher use to RouteProvider

* Surface wasm_bindgen unavailable error to console

* Remove unnecessary use of Jest settings wrappers

* Replace dynamic import with actor.getSnapshot

* Migrate system theme and theme color watching from useEffects to actors/actions

* Migrate cursor color effect

* Remove unused code that is now in RouteProvider

* Migrate route commands registration further down for now, out of SettingsAuthProvider

* Migrate settings command registration out of SettingsAuthProvider.tsx

* Delete SettingsAuthProvider.tsx!

* Remove unused settingsLoader!

* fmt and remove comments

* Use actor for routeLoader

* Fix project read error due to uninitialized WASM

* Fix user settings load error due to uninitialized WASM

* Move settingsActor into appActor as a spawned child

* Trying to fix unit tests

* Remove unused imports and demo window attachments

* fmt

* Fix testing issues caused by circular dependency

* Add `setThemeColor` to a few actions list it was missing from

* fmt

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Fix "Execute AST" action in browser, where currentProject is `undefined`

* Update commands list when currentProject changes

* Fix `clearProjectSettings`, which was passing along non-settings context

* Fix onboarding test that actually needed the onboarding initially dismissed

* Add scrollIntoView to make this test more reliable

* @lf94's feedback I missed

I got distracted by a million other things last week

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Revert "A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)"

This reverts commit 129226c6ef.

* fmt

* revert bad snapshot

* Fix up camera movement test locator

* Fix test that was flipping the user settings without waiting

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/components/UnitsMenu.tsx

@@ -1,5 +1,5 @@
 import { Popover } from '@headlessui/react'
-import { useSettingsAuthContext } from 'hooks/useSettingsAuthContext'
+import { settingsActor, useSettings } from 'machines/appMachine'
 import { changeKclSettings, unitLengthToUnitLen } from 'lang/wasm'
 import { baseUnitLabels, baseUnitsUnion } from 'lib/settings/settingsTypes'
 import { codeManager, kclManager } from 'lib/singletons'
@@ -8,24 +8,25 @@ import { useEffect, useState } from 'react'
 import toast from 'react-hot-toast'
 
 export function UnitsMenu() {
-  const { settings } = useSettingsAuthContext()
+  const settings = useSettings()
   const [hasPerFileLengthUnit, setHasPerFileLengthUnit] = useState(
     Boolean(kclManager.fileSettings.defaultLengthUnit)
   )
   const [lengthSetting, setLengthSetting] = useState(
     kclManager.fileSettings.defaultLengthUnit ||
-      settings.context.modeling.defaultUnit.current
+      settings.modeling.defaultUnit.current
   )
   useEffect(() => {
     setHasPerFileLengthUnit(Boolean(kclManager.fileSettings.defaultLengthUnit))
     setLengthSetting(
       kclManager.fileSettings.defaultLengthUnit ||
-        settings.context.modeling.defaultUnit.current
+        settings.modeling.defaultUnit.current
     )
   }, [
     kclManager.fileSettings.defaultLengthUnit,
-    settings.context.modeling.defaultUnit.current,
+    settings.modeling.defaultUnit.current,
   ])
+
   return (
     <Popover className="relative pointer-events-auto">
       {({ close }) => (
@@ -75,7 +76,7 @@ export function UnitsMenu() {
                             .catch(reportRejection)
                         }
                       } else {
-                        settings.send({
+                        settingsActor.send({
                           type: 'set.modeling.defaultUnit',
                           data: {
                             level: 'project',