Change Updates icon badge to show new updates count (#8659)

* Change Updates icon badge to show new updates count

* Fix reference

* review changes

* Lint

app/src/main/java/eu/kanade/tachiyomi/ui/updates/UpdatesScreenModel.kt

@@ -60,10 +60,10 @@ class UpdatesScreenModel(
     private val getUpdates: GetUpdates = Injekt.get(),
     private val getManga: GetManga = Injekt.get(),
     private val getChapter: GetChapter = Injekt.get(),
+    private val libraryPreferences: LibraryPreferences = Injekt.get(),
     val snackbarHostState: SnackbarHostState = SnackbarHostState(),
     basePreferences: BasePreferences = Injekt.get(),
     uiPreferences: UiPreferences = Injekt.get(),
-    libraryPreferences: LibraryPreferences = Injekt.get(),
 ) : StateScreenModel<UpdatesState>(UpdatesState()) {
 
     private val _events: Channel<Event> = Channel(Int.MAX_VALUE)
@@ -371,6 +371,10 @@ class UpdatesScreenModel(
         mutableState.update { it.copy(dialog = dialog) }
     }
 
+    fun resetNewUpdatesCount() {
+        libraryPreferences.newUpdatesCount().set(0)
+    }
+
     sealed class Dialog {
         data class DeleteConfirmation(val toDelete: List<UpdatesItem>) : Dialog()
     }

app/src/main/java/eu/kanade/tachiyomi/ui/updates/UpdatesTab.kt

@@ -4,6 +4,7 @@ import androidx.compose.animation.graphics.res.animatedVectorResource
 import androidx.compose.animation.graphics.res.rememberAnimatedVectorPainter
 import androidx.compose.animation.graphics.vector.AnimatedImageVector
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
@@ -110,5 +111,12 @@ object UpdatesTab : Tab {
                 (context as? MainActivity)?.ready = true
             }
         }
+        DisposableEffect(Unit) {
+            screenModel.resetNewUpdatesCount()
+
+            onDispose {
+                screenModel.resetNewUpdatesCount()
+            }
+        }
     }
 }