Fix some crashes

app/src/main/java/eu/kanade/domain/history/interactor/GetNextChapter.kt

@@ -21,8 +21,8 @@ class GetNextChapter(
     }
 
     suspend fun await(mangaId: Long, chapterId: Long): Chapter? {
-        val chapter = getChapter.await(chapterId)!!
-        val manga = getManga.await(mangaId)!!
+        val chapter = getChapter.await(chapterId) ?: return null
+        val manga = getManga.await(mangaId) ?: return null
 
         if (!chapter.read) return chapter
 

app/src/main/java/eu/kanade/presentation/browse/BrowseSourceScreen.kt

@@ -89,7 +89,7 @@ fun BrowseSourceScreen(
             Column(modifier = Modifier.background(MaterialTheme.colorScheme.surface)) {
                 BrowseSourceToolbar(
                     state = presenter,
-                    source = presenter.source!!,
+                    source = presenter.source,
                     displayMode = presenter.displayMode,
                     onDisplayModeChange = { presenter.displayMode = it },
                     navigateUp = navigateUp,

app/src/main/java/eu/kanade/presentation/browse/components/BrowseSourceToolbar.kt

@@ -33,7 +33,7 @@ import eu.kanade.tachiyomi.source.LocalSource
 @Composable
 fun BrowseSourceToolbar(
     state: BrowseSourceState,
-    source: CatalogueSource,
+    source: CatalogueSource?,
     displayMode: LibraryDisplayMode,
     onDisplayModeChange: (LibraryDisplayMode) -> Unit,
     navigateUp: () -> Unit,
@@ -44,7 +44,7 @@ fun BrowseSourceToolbar(
 ) {
     if (state.searchQuery == null) {
         BrowseSourceRegularToolbar(
-            title = if (state.isUserQuery) state.currentFilter.query else source.name,
+            title = if (state.isUserQuery) state.currentFilter.query else source?.name.orEmpty(),
             isLocalSource = source is LocalSource,
             displayMode = displayMode,
             onDisplayModeChange = onDisplayModeChange,

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionFilterPresenter.kt

@@ -13,6 +13,7 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.receiveAsFlow
+import kotlinx.coroutines.flow.stateIn
 import logcat.LogPriority
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
@@ -35,6 +36,7 @@ class ExtensionFilterPresenter(
                     logcat(LogPriority.ERROR, exception)
                     _events.send(Event.FailedFetchingLanguages)
                 }
+                .stateIn(presenterScope)
                 .collectLatest(::collectLatestSourceLangMap)
         }
     }

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/search/SourceSearchController.kt

@@ -29,10 +29,6 @@ class SourceSearchController(
 
     @Composable
     override fun ComposeContent() {
-        // LocalContext is not a first available to us when we try access it
-        // Decoupling from BrowseSourceController is needed
-        val context = applicationContext!!
-
         SourceSearchScreen(
             presenter = presenter,
             navigateUp = { router.popCurrentController() },
@@ -46,8 +42,10 @@ class SourceSearchController(
             },
             onWebViewClick = f@{
                 val source = presenter.source as? HttpSource ?: return@f
-                val intent = WebViewActivity.newIntent(context, source.baseUrl, source.id, source.name)
-                context.startActivity(intent)
+                activity?.let { context ->
+                    val intent = WebViewActivity.newIntent(context, source.baseUrl, source.id, source.name)
+                    context.startActivity(intent)
+                }
             },
         )
 

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/SourcesFilterPresenter.kt

@@ -15,6 +15,7 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.receiveAsFlow
+import kotlinx.coroutines.flow.stateIn
 import logcat.LogPriority
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
@@ -39,6 +40,7 @@ class SourcesFilterPresenter(
                     logcat(LogPriority.ERROR, exception)
                     _events.send(Event.FailedFetchingLanguages)
                 }
+                .stateIn(presenterScope)
                 .collectLatest(::collectLatestSourceLangMap)
         }
     }