use typeahead search to handle searches on Android

android/Omnivore/app/src/main/graphql/TypeAheadSearch.graphql

@@ -0,0 +1,15 @@
+query TypeaheadSearch($query: String!) {
+  typeaheadSearch(query: $query) {
+    ... on TypeaheadSearchSuccess {
+      items {
+        id
+        title
+        slug
+        siteName
+      }
+    }
+    ... on TypeaheadSearchError {
+      errorCodes
+    }
+  }
+}

android/Omnivore/app/src/main/java/app/omnivore/omnivore/networking/SearchQuery.kt

@@ -1,6 +1,7 @@
 package app.omnivore.omnivore.networking
 
 import app.omnivore.omnivore.graphql.generated.SearchQuery
+import app.omnivore.omnivore.graphql.generated.TypeaheadSearchQuery
 import app.omnivore.omnivore.models.LinkedItem
 import com.apollographql.apollo3.api.Optional
 
@@ -9,6 +10,46 @@ data class SearchQueryResponse(
   val items: List<LinkedItem>
 )
 
+suspend fun Networker.typeaheadSearch(
+  query: String
+): SearchQueryResponse {
+  try {
+    val result = authenticatedApolloClient().query(
+      TypeaheadSearchQuery(query)
+    ).execute()
+
+    val itemList = result.data?.typeaheadSearch?.onTypeaheadSearchSuccess?.items ?: listOf()
+
+    val items = itemList.map {
+      LinkedItem(
+        id = it.id,
+        title = it.title,
+        createdAt = "",
+        savedAt = "",
+        readAt = "",
+        updatedAt = "",
+        readingProgress = 0.0,
+        readingProgressAnchor = 0,
+        imageURLString = null,
+        pageURLString = "",
+        descriptionText = "",
+        publisherURLString = "",
+        siteName = it.siteName,
+        author = "",
+        publishDate = null,
+        slug = it.slug,
+        isArchived = false,
+        contentReader = null,
+        content = null
+      )
+    }
+
+    return SearchQueryResponse(null, items)
+  } catch (e: java.lang.Exception) {
+    return SearchQueryResponse(null, listOf())
+  }
+}
+
 suspend fun Networker.search(
   cursor: String? = null,
   limit: Int = 15,

android/Omnivore/app/src/main/java/app/omnivore/omnivore/ui/home/HomeViewModel.kt

@@ -59,7 +59,12 @@ class HomeViewModel @Inject constructor(
       searchIdx += 1
 
       // Execute the search
-      val searchResult = networker.search(cursor = cursor, query = searchQuery())
+      val searchResult =
+        if (searchTextLiveData.value != "") {
+          networker.typeaheadSearch(searchTextLiveData.value ?: "")
+        } else {
+          networker.search(cursor = cursor, query = searchQuery())
+        }
 
       // Search results aren't guaranteed to return in order so this
       // will discard old results that are returned while a user is typing.

android/Omnivore/app/src/main/java/app/omnivore/omnivore/ui/linkedItemViews/LinkedItemCard.kt

@@ -47,7 +47,7 @@ fun LinkedItemCard(item: LinkedItem, onClickHandler: () -> Unit, actionHandler:
           lineHeight = 20.sp
         )
 
-        if (item.author != null) {
+        if (item.author != null && item.author != "") {
           Text(
             text = "By ${item.author}",
             style = MaterialTheme.typography.bodyMedium,