[APP-2160] Build new standard.site link card UI (#10468)

Co-authored-by: vineyardbovines <spencer@thepope.dev>
Co-authored-by: Eric Bailey <git@esb.lol>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

src/components/Post/Embed/StandardSiteEmbed/utils.ts

@@ -0,0 +1,36 @@
+import {
+  type AppBskyEmbedExternal,
+  AtUri,
+  type ComAtprotoRepoStrongRef,
+} from '@atproto/api'
+
+export function isStandardSiteDocumentUri(ref: ComAtprotoRepoStrongRef.Main) {
+  return new AtUri(ref.uri).collection.startsWith('site.standard.document')
+}
+
+export function isStandardSitePublicationUri(
+  ref: ComAtprotoRepoStrongRef.Main,
+) {
+  return new AtUri(ref.uri).collection.startsWith('site.standard.publication')
+}
+
+export function isStandardSiteUri(ref: ComAtprotoRepoStrongRef.Main) {
+  return new AtUri(ref.uri).collection.startsWith('site.standard.')
+}
+
+export function isStandardSiteEmbed(view: AppBskyEmbedExternal.ViewExternal) {
+  return view.associatedRefs?.some(ref => isStandardSiteUri(ref))
+}
+
+export function isStandardSitePublicationEmbed(
+  view: AppBskyEmbedExternal.ViewExternal,
+) {
+  return (
+    view.associatedRefs?.some(
+      ref => new AtUri(ref.uri).collection === 'site.standard.publication',
+    ) &&
+    view.associatedRefs.every(
+      ref => new AtUri(ref.uri).collection !== 'site.standard.document',
+    )
+  )
+}