Fix pagination

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/dev/msfjarvis/lobsters/MainActivity.kt

@@ -10,7 +10,6 @@ import androidx.compose.material.Scaffold
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.Providers
 import androidx.compose.runtime.ambientOf
-import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.platform.setContent
 import androidx.navigation.compose.KEY_ROUTE
@@ -53,8 +52,6 @@ fun LobstersApp(
   viewModel: LobstersViewModel
 ) {
   val urlLauncher = UrlLauncherAmbient.current
-  val posts = viewModel.posts.collectAsState()
-  val lastIndex = posts.value.lastIndex
   val navController = rememberNavController()
   val destinations = arrayOf(Destination.Hottest, Destination.Saved)
 
@@ -92,7 +89,7 @@ fun LobstersApp(
   ) {
     NavHost(navController, startDestination = Destination.Hottest.route) {
       composable(Destination.Hottest.route) {
-        HottestPosts(lastIndex = lastIndex, urlLauncher = urlLauncher , viewModel = viewModel)
+        HottestPosts(urlLauncher = urlLauncher, viewModel = viewModel)
       }
       composable(Destination.Saved.route) {
         SavedPosts(urlLauncher = urlLauncher, viewModel = viewModel)

app/src/main/java/dev/msfjarvis/lobsters/ui/HottestPosts.kt

@@ -13,7 +13,6 @@ import dev.msfjarvis.lobsters.urllauncher.UrlLauncher
 
 @Composable
 fun HottestPosts(
-  lastIndex: Int,
   urlLauncher: UrlLauncher,
   viewModel: LobstersViewModel,
 ) {
@@ -28,7 +27,7 @@ fun HottestPosts(
       state = listState,
       modifier = Modifier.padding(horizontal = 8.dp)
     ) { index, item ->
-      if (lastIndex == index) {
+      if (posts.lastIndex == index) {
         viewModel.getMorePosts()
       }
       LobstersItem(