Add persistent state provider (#1830)

* Add persistent state provider

* Catch write error

* Handle read errors, update error msgs

* Fix lint

* Don't provide initial state to loader

* Remove colorMode from shell state

* Idea: hook into persisted context from other files

* Migrate settings to new hook

* Rework persisted state to split individual contexts

* Tweak persisted schema and validation

---------

Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/state/persisted/schema.ts

@@ -0,0 +1,68 @@
+import {z} from 'zod'
+import {deviceLocales} from '#/platform/detection'
+
+// only data needed for rendering account page
+const accountSchema = z.object({
+  service: z.string(),
+  did: z.string(),
+  refreshJwt: z.string().optional(),
+  accessJwt: z.string().optional(),
+  handle: z.string(),
+  displayName: z.string(),
+  aviUrl: z.string(),
+})
+
+export const schema = z.object({
+  colorMode: z.enum(['system', 'light', 'dark']),
+  session: z.object({
+    accounts: z.array(accountSchema),
+    currentAccount: accountSchema.optional(),
+  }),
+  reminders: z.object({
+    lastEmailConfirmReminder: z.string().optional(),
+  }),
+  languagePrefs: z.object({
+    primaryLanguage: z.string(), // should move to server
+    contentLanguages: z.array(z.string()), // should move to server
+    postLanguage: z.string(), // should move to server
+    postLanguageHistory: z.array(z.string()),
+  }),
+  requireAltTextEnabled: z.boolean(), // should move to server
+  mutedThreads: z.array(z.string()), // should move to server
+  invitedUsers: z.object({
+    seenDids: z.array(z.string()),
+    copiedInvites: z.array(z.string()),
+  }),
+  onboarding: z.object({
+    step: z.string(),
+  }),
+})
+export type Schema = z.infer<typeof schema>
+
+export const defaults: Schema = {
+  colorMode: 'system',
+  session: {
+    accounts: [],
+    currentAccount: undefined,
+  },
+  reminders: {
+    lastEmailConfirmReminder: undefined,
+  },
+  languagePrefs: {
+    primaryLanguage: deviceLocales[0] || 'en',
+    contentLanguages: deviceLocales || [],
+    postLanguage: deviceLocales[0] || 'en',
+    postLanguageHistory: (deviceLocales || [])
+      .concat(['en', 'ja', 'pt', 'de'])
+      .slice(0, 6),
+  },
+  requireAltTextEnabled: false,
+  mutedThreads: [],
+  invitedUsers: {
+    seenDids: [],
+    copiedInvites: [],
+  },
+  onboarding: {
+    step: 'Home',
+  },
+}