Use unique keys for all screens to avoid crashes

Fixes #9008
Fixes #9110

app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewScreen.kt

@@ -3,10 +3,9 @@ package eu.kanade.tachiyomi.ui.webview
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalContext
 import cafe.adriel.voyager.core.model.rememberScreenModel
-import cafe.adriel.voyager.core.screen.Screen
-import cafe.adriel.voyager.core.screen.uniqueScreenKey
 import cafe.adriel.voyager.navigator.LocalNavigator
 import cafe.adriel.voyager.navigator.currentOrThrow
+import eu.kanade.core.navigation.Screen
 import eu.kanade.presentation.util.AssistContentScreen
 import eu.kanade.presentation.webview.WebViewScreenContent
 
@@ -14,12 +13,10 @@ class WebViewScreen(
     private val url: String,
     private val initialTitle: String? = null,
     private val sourceId: Long? = null,
-) : Screen, AssistContentScreen {
+) : Screen(), AssistContentScreen {
 
     private var assistUrl: String? = null
 
-    override val key = uniqueScreenKey
-
     override fun onProvideAssistUrl() = assistUrl
 
     @Composable