Convert ErrorActivity to compose

app/src/main/AndroidManifest.xml

@@ -80,6 +80,10 @@
             </intent-filter>
         </service>
 
+        <activity
+            android:name=".ComposeActivity"
+            android:exported="false" />
+
         <activity
             android:name=".player.PlayQueueActivity"
             android:exported="false"
@@ -91,10 +95,6 @@
             android:exported="false"
             android:label="@string/settings" />
 
-        <activity
-            android:name=".settings.SettingsV2Activity"
-            android:exported="true"
-            android:label="@string/settings" />
 
         <activity
             android:name=".about.AboutActivity"
@@ -129,10 +129,6 @@
             android:label="@string/general_error"
             android:theme="@android:style/Theme.NoDisplay" />
 
-        <activity
-            android:name=".error.ErrorActivity"
-            android:exported="false" />
-
         <!-- giga get related -->
         <activity
             android:name=".download.DownloadActivity"

app/src/main/java/org/schabi/newpipe/ComposeActivity.kt

@@ -0,0 +1,83 @@
+/*
+ * SPDX-FileCopyrightText: 2025-2026 NewPipe e.V. <https://newpipe-ev.de>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package org.schabi.newpipe
+
+import android.content.Context
+import android.content.Intent
+import android.graphics.Color
+import android.os.Build
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.SystemBarStyle
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.navigation3.runtime.NavKey
+import dagger.hilt.android.AndroidEntryPoint
+import org.schabi.newpipe.error.ErrorInfo
+import org.schabi.newpipe.navigation.NavDisplay
+import org.schabi.newpipe.navigation.Screen
+import org.schabi.newpipe.ui.theme.AppTheme
+
+/**
+ * Single host activity for all Compose-based screens.
+ * Other parts of the app (including legacy View-based code) launch this activity
+ * via Intent with extras specifying which screen to display.
+ */
+@AndroidEntryPoint
+class ComposeActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        enableEdgeToEdge(
+            navigationBarStyle = SystemBarStyle.auto(Color.TRANSPARENT, Color.TRANSPARENT)
+        )
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            window.isNavigationBarContrastEnforced = false
+        }
+        super.onCreate(savedInstanceState)
+
+        val startDestination: NavKey = resolveStartDestination(intent)
+
+        setContent {
+            AppTheme {
+                NavDisplay(startDestination)
+            }
+        }
+    }
+
+    private fun resolveStartDestination(intent: Intent): NavKey {
+        return when (intent.getStringExtra(EXTRA_SCREEN)) {
+            SCREEN_ERROR -> Screen.Error
+
+            SCREEN_SETTINGS -> Screen.Settings.Home
+
+            else -> throw IllegalArgumentException(
+                "Unknown screen: ${intent.getStringExtra(EXTRA_SCREEN)}"
+            )
+        }
+    }
+
+    companion object {
+        const val EXTRA_SCREEN = "extra_screen"
+        const val EXTRA_ERROR_INFO = "extra_error_info"
+
+        const val SCREEN_ERROR = "error"
+        const val SCREEN_SETTINGS = "settings"
+
+        fun errorIntent(context: Context, errorInfo: ErrorInfo): Intent {
+            return Intent(context, ComposeActivity::class.java).apply {
+                putExtra(EXTRA_SCREEN, SCREEN_ERROR)
+                putExtra(EXTRA_ERROR_INFO, errorInfo)
+                addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            }
+        }
+
+        fun settingsIntent(context: Context): Intent {
+            return Intent(context, ComposeActivity::class.java).apply {
+                putExtra(EXTRA_SCREEN, SCREEN_SETTINGS)
+            }
+        }
+    }
+}