Use Compose for OAuth login loading indicator

app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/sources/MigrationSourcesController.kt

@@ -19,8 +19,7 @@ class MigrationSourcesController : ComposeController<MigrationSourcesPresenter>(
         setHasOptionsMenu(true)
     }
 
-    override fun createPresenter(): MigrationSourcesPresenter =
-        MigrationSourcesPresenter()
+    override fun createPresenter() = MigrationSourcesPresenter()
 
     @Composable
     override fun ComposeContent(nestedScrollInterop: NestedScrollConnection) {
@@ -38,7 +37,7 @@ class MigrationSourcesController : ComposeController<MigrationSourcesPresenter>(
             onLongClickItem = { source ->
                 val sourceId = source.id.toString()
                 activity?.copyToClipboard(sourceId, sourceId)
-            }
+            },
         )
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/BaseOAuthLoginActivity.kt

@@ -3,10 +3,9 @@ package eu.kanade.tachiyomi.ui.setting.track
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
-import android.view.Gravity
-import android.view.ViewGroup
-import android.widget.FrameLayout
-import android.widget.ProgressBar
+import androidx.activity.compose.setContent
+import eu.kanade.presentation.components.LoadingScreen
+import eu.kanade.presentation.theme.TachiyomiTheme
 import eu.kanade.tachiyomi.data.track.TrackManager
 import eu.kanade.tachiyomi.ui.base.activity.BaseActivity
 import eu.kanade.tachiyomi.ui.main.MainActivity
@@ -21,15 +20,11 @@ abstract class BaseOAuthLoginActivity : BaseActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        val view = ProgressBar(this)
-        setContentView(
-            view,
-            FrameLayout.LayoutParams(
-                ViewGroup.LayoutParams.WRAP_CONTENT,
-                ViewGroup.LayoutParams.WRAP_CONTENT,
-                Gravity.CENTER,
-            ),
-        )
+        setContent {
+            TachiyomiTheme {
+                LoadingScreen()
+            }
+        }
 
         handleResult(intent.data)
     }
@@ -37,8 +32,9 @@ abstract class BaseOAuthLoginActivity : BaseActivity() {
     internal fun returnToSettings() {
         finish()
 
-        val intent = Intent(this, MainActivity::class.java)
-        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP)
+        val intent = Intent(this, MainActivity::class.java).apply {
+            addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP)
+        }
         startActivity(intent)
     }
 }