First pass at a session handler (#1850)

* First pass at a session handler

* TODOs

* Fix recursion

* Couple more things

* Add back resume session concept

* Handle ready

* Cleanup of initial loading states

* Handle init failure

* Cleanup

* Remove account

* Add updateCurrentAccount

* Remove log

* Cleanup

* Integrate removeAccount

* Add hasSession

* Add to App.native, harden migration

* Use effect to persist data

src/state/shell/onboarding.tsx

@@ -82,12 +82,16 @@ export function Provider({children}: React.PropsWithChildren<{}>) {
 
   React.useEffect(() => {
     return persisted.onUpdate(() => {
-      dispatch({
-        type: 'set',
-        step: persisted.get('onboarding').step as OnboardingStep,
-      })
+      const next = persisted.get('onboarding').step
+      // TODO we've introduced a footgun
+      if (state.step !== next) {
+        dispatch({
+          type: 'set',
+          step: persisted.get('onboarding').step as OnboardingStep,
+        })
+      }
     })
-  }, [dispatch])
+  }, [state, dispatch])
 
   return (
     <stateContext.Provider value={state}>