Remove deprecated models and mobx usage (react-query refactor) (#1934)

* Update login page to use service query

* Update modal to use session instead of store

* Move image sizes cache off store

* Update settings to no longer use store

* Update link-meta fetch to use agent instead of rootstore

* Remove deprecated resolveName()

* Delete deprecated link-metas cache

* Delete deprecated posts cache

* Delete all remaining mobx models, including the root store

* Strip out unused mobx observer wrappers

src/lib/link-meta/link-meta.ts

@@ -1,5 +1,5 @@
+import {BskyAgent} from '@atproto/api'
 import {isBskyAppUrl} from '../strings/url-helpers'
-import {RootStoreModel} from 'state/index'
 import {extractBskyMeta} from './bsky'
 import {LINK_META_PROXY} from 'lib/constants'
 
@@ -23,12 +23,12 @@ export interface LinkMeta {
 }
 
 export async function getLinkMeta(
-  store: RootStoreModel,
+  agent: BskyAgent,
   url: string,
   timeout = 5e3,
 ): Promise<LinkMeta> {
   if (isBskyAppUrl(url)) {
-    return extractBskyMeta(store, url)
+    return extractBskyMeta(agent, url)
   }
 
   let urlp
@@ -55,9 +55,9 @@ export async function getLinkMeta(
     const to = setTimeout(() => controller.abort(), timeout || 5e3)
 
     const response = await fetch(
-      `${LINK_META_PROXY(
-        store.session.currentSession?.service || '',
-      )}${encodeURIComponent(url)}`,
+      `${LINK_META_PROXY(agent.service.toString() || '')}${encodeURIComponent(
+        url,
+      )}`,
       {signal: controller.signal},
     )