feat(android): :app module skeleton — Compose Activity + manifest

M8 phase 1.2. AndroidManifest declares FGS mediaPlayback +
POST_NOTIFICATIONS permissions ahead of the player phase. Activity
hosts a single Compose Scaffold for now; nav graph lands in phase 5.

Launcher icons reused from flutter_client/ (same applicationId means
same brand at cutover). MinstrelApplication referenced in manifest
but the class itself lands in Task 1.3 — manifest class names are
resolved at install time, not build time, so the intermediate commit
still builds.

@AndroidEntryPoint deferred to Task 1.3 alongside @HiltAndroidApp on
MinstrelApplication (Hilt KSP errors without an annotated Application).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <application
+        android:name=".MinstrelApplication"
+        android:allowBackup="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Minstrel"
+        android:usesCleartextTraffic="true"
+        tools:targetApi="34">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.Minstrel">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <!-- Media3 MediaSessionService is registered in Phase 6 (Task 6.2). -->
+    </application>
+</manifest>

android/app/src/main/java/com/fabledsword/minstrel/MainActivity.kt

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+package com.fabledsword.minstrel
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+
+// @AndroidEntryPoint added in Task 1.3 alongside @HiltAndroidApp on MinstrelApplication
+// (Hilt KSP errors without an annotated Application class).
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent { App() }
+    }
+}
+
+@Composable
+private fun App() {
+    Scaffold(modifier = Modifier.fillMaxSize()) { inner ->
+        Text(text = "Minstrel native — phase 1", modifier = Modifier.padding(inner))
+    }
+}

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Minstrel</string>
+</resources>

android/app/src/main/res/values/themes.xml

@@ -0,0 +1,8 @@
+<resources>
+    <!-- Compose-MaterialTheme owns visual theming at runtime. This <style> only
+         suppresses the action bar and sets a base window background to prevent
+         the white flash during cold start. -->
+    <style name="Theme.Minstrel" parent="android:Theme.Material.NoActionBar">
+        <item name="android:windowBackground">@android:color/black</item>
+    </style>
+</resources>

android/app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Backups disabled. Room schema rebuild on cutover is cheap; sync controller
+     refills from server. -->
+<full-backup-content>
+    <exclude domain="database" />
+    <exclude domain="sharedpref" />
+</full-backup-content>

android/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+    </device-transfer>
+</data-extraction-rules>