(optional) In app browser (#2490)

* add expo web browser + modal

* add in app browser option to settings

* don't show toggle on web

* Tweak browser-choice UIs

---------

Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/state/persisted/schema.ts

@@ -53,6 +53,7 @@ export const schema = z.object({
     step: z.string(),
   }),
   hiddenPosts: z.array(z.string()).optional(), // should move to server
+  useInAppBrowser: z.boolean().optional(),
 })
 export type Schema = z.infer<typeof schema>
 
@@ -84,4 +85,5 @@ export const defaults: Schema = {
     step: 'Home',
   },
   hiddenPosts: [],
+  useInAppBrowser: undefined,
 }