fix(android): include modified files for Phase 20 (previous commit missed them)

Previous commit (45e2248) committed only the two new theme files; the
six modified files (MainActivity, AuthStore, AppDatabase, AuthSessionDao,
AuthSessionEntity, SettingsScreen) silently didn't get staged. This
commit lands the actual integration so the theme picker works end-to-end.

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

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

@@ -8,6 +8,7 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
@@ -18,6 +19,7 @@ import androidx.navigation.compose.rememberNavController
 import com.fabledsword.minstrel.auth.ui.AuthGateViewModel
 import com.fabledsword.minstrel.nav.MinstrelNavGraph
 import com.fabledsword.minstrel.theme.MinstrelTheme
+import com.fabledsword.minstrel.theme.ThemePreferenceViewModel
 import dagger.hilt.android.AndroidEntryPoint
 
 @AndroidEntryPoint
@@ -25,36 +27,45 @@ class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
-        setContent {
-            MinstrelTheme { App() }
+        setContent { App() }
+    }
+}
+
+@Composable
+private fun App(
+    themeVm: ThemePreferenceViewModel = hiltViewModel(),
+    gate: AuthGateViewModel = hiltViewModel(),
+) {
+    val theme by themeVm.themeMode.collectAsStateWithLifecycle()
+    MinstrelTheme(darkOverride = theme.toDarkOverride()) {
+        val startDestination by gate.startDestination.collectAsStateWithLifecycle()
+        val resolved = startDestination
+        if (resolved == null) {
+            BootSplash()
+        } else {
+            // No bottom nav, no drawer — navigation is per-screen via
+            // the AppBar actions row + kebab (`MainAppBarActions`). The
+            // MiniPlayer is included by each in-shell route's
+            // `ShellScaffold` wrap; full-screen routes (NowPlaying /
+            // Queue / unauthenticated) bypass the shell entirely.
+            val navController = rememberNavController()
+            MinstrelNavGraph(
+                navController = navController,
+                startDestination = resolved,
+                modifier = Modifier.fillMaxSize(),
+            )
         }
     }
 }
 
-@Composable
-private fun App(gate: AuthGateViewModel = hiltViewModel()) {
-    val startDestination by gate.startDestination.collectAsStateWithLifecycle()
-    val resolved = startDestination
-    if (resolved == null) {
-        BootSplash()
-    } else {
-        // No bottom nav, no drawer — navigation is per-screen via the
-        // AppBar actions row + kebab (`MainAppBarActions`). The MiniPlayer
-        // is included by each in-shell route's `ShellScaffold` wrap;
-        // full-screen routes (NowPlaying / Queue / unauthenticated)
-        // bypass the shell entirely.
-        val navController = rememberNavController()
-        MinstrelNavGraph(
-            navController = navController,
-            startDestination = resolved,
-            modifier = Modifier.fillMaxSize(),
-        )
-    }
-}
-
 @Composable
 private fun BootSplash() {
-    Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-        CircularProgressIndicator(color = MaterialTheme.colorScheme.primary)
+    Surface(
+        modifier = Modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background,
+    ) {
+        Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+            CircularProgressIndicator(color = MaterialTheme.colorScheme.primary)
+        }
     }
 }

android/app/src/main/java/com/fabledsword/minstrel/auth/AuthStore.kt

@@ -40,12 +40,16 @@ class AuthStore @Inject constructor(
     private val userJsonState = MutableStateFlow<String?>(null)
     val userJson: StateFlow<String?> = userJsonState.asStateFlow()
 
+    private val themeModeState = MutableStateFlow<String?>(null)
+    val themeMode: StateFlow<String?> = themeModeState.asStateFlow()
+
     init {
         scope.launch {
             dao.observe().collect { row ->
                 sessionCookieState.value = row?.sessionCookie
                 baseUrlState.value = row?.baseUrl ?: DEFAULT_BASE_URL
                 userJsonState.value = row?.userJson
+                themeModeState.value = row?.themeMode
             }
         }
     }
@@ -65,6 +69,11 @@ class AuthStore @Inject constructor(
         scope.launch { persistUserJson(value) }
     }
 
+    fun setThemeMode(value: String?) {
+        themeModeState.value = value
+        scope.launch { persistThemeMode(value) }
+    }
+
     private suspend fun persistCookie(value: String?) {
         if (dao.get() == null) {
             dao.upsert(currentEntity().copy(sessionCookie = value))
@@ -89,11 +98,20 @@ class AuthStore @Inject constructor(
         }
     }
 
+    private suspend fun persistThemeMode(value: String?) {
+        if (dao.get() == null) {
+            dao.upsert(currentEntity().copy(themeMode = value))
+        } else {
+            dao.setThemeMode(value)
+        }
+    }
+
     private fun currentEntity(): AuthSessionEntity = AuthSessionEntity(
         id = ROW_ID,
         sessionCookie = sessionCookieState.value,
         baseUrl = baseUrlState.value,
         userJson = userJsonState.value,
+        themeMode = themeModeState.value,
     )
 
     companion object {

android/app/src/main/java/com/fabledsword/minstrel/cache/db/AppDatabase.kt

@@ -59,7 +59,7 @@ import com.fabledsword.minstrel.cache.db.entities.SyncMetadataEntity
         CachedHomeIndexEntity::class,
         AuthSessionEntity::class,
     ],
-    version = 2,
+    version = 3,
     exportSchema = true,
 )
 @TypeConverters(MinstrelTypeConverters::class)

android/app/src/main/java/com/fabledsword/minstrel/cache/db/dao/AuthSessionDao.kt

@@ -30,4 +30,8 @@ interface AuthSessionDao {
     /** Partial update: change only the serialized user identity JSON. */
     @Query("UPDATE auth_session SET userJson = :userJson WHERE id = 0")
     suspend fun setUserJson(userJson: String?)
+
+    /** Partial update: change only the theme override ("light"/"dark"/null=system). */
+    @Query("UPDATE auth_session SET themeMode = :themeMode WHERE id = 0")
+    suspend fun setThemeMode(themeMode: String?)
 }

android/app/src/main/java/com/fabledsword/minstrel/cache/db/entities/AuthSessionEntity.kt

@@ -5,7 +5,8 @@ import androidx.room.PrimaryKey
 
 /**
  * Single-row table holding the user's session cookie, configured
- * server base URL, and the serialized current user identity.
+ * server base URL, the serialized current user identity, and the
+ * theme-override preference.
  *
  * `id = 0` is the only valid row. `sessionCookie` is null when the
  * user is logged out (or has never logged in). `baseUrl` always has
@@ -13,6 +14,12 @@ import androidx.room.PrimaryKey
  * configures one in Settings. `userJson` is the JSON-encoded
  * UserRef captured at sign-in so the username + isAdmin survive
  * a cold restart (the cookie alone doesn't carry identity).
+ * `themeMode` is "system" / "light" / "dark" (or null = system).
+ *
+ * The table is the de-facto single-row app-prefs row at this point,
+ * not strictly auth-only. Kept under the auth_session name to avoid
+ * a schema-rename migration; a future cleanup could rename to
+ * `app_preferences`.
  */
 @Entity(tableName = "auth_session")
 data class AuthSessionEntity(
@@ -20,4 +27,5 @@ data class AuthSessionEntity(
     val sessionCookie: String? = null,
     val baseUrl: String,
     val userJson: String? = null,
+    val themeMode: String? = null,
 )

android/app/src/main/java/com/fabledsword/minstrel/settings/ui/SettingsScreen.kt

@@ -18,6 +18,9 @@ import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.SegmentedButton
+import androidx.compose.material3.SegmentedButtonDefaults
+import androidx.compose.material3.SingleChoiceSegmentedButtonRow
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
@@ -35,14 +38,18 @@ import com.fabledsword.minstrel.BuildConfig
 import com.fabledsword.minstrel.nav.Settings as SettingsRoute
 import com.fabledsword.minstrel.nav.ServerUrl
 import com.fabledsword.minstrel.shared.widgets.MainAppBarActions
+import com.fabledsword.minstrel.theme.ThemeMode
+import com.fabledsword.minstrel.theme.ThemePreferenceViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun SettingsScreen(
     navController: NavHostController,
     viewModel: SettingsViewModel = hiltViewModel(),
+    themeVm: ThemePreferenceViewModel = hiltViewModel(),
 ) {
     val state by viewModel.state.collectAsStateWithLifecycle()
+    val themeMode by themeVm.themeMode.collectAsStateWithLifecycle()
 
     LaunchedEffect(state.signedOut) {
         if (state.signedOut) {
@@ -75,6 +82,7 @@ fun SettingsScreen(
             verticalArrangement = Arrangement.spacedBy(16.dp),
         ) {
             AccountCard(username = state.username, serverUrl = state.serverUrl)
+            AppearanceCard(themeMode = themeMode, onPick = themeVm::setThemeMode)
             AboutCard()
             SignOutButton(isSigningOut = state.isSigningOut, onSignOut = viewModel::signOut)
         }
@@ -115,6 +123,47 @@ private fun AccountCard(username: String, serverUrl: String) {
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun AppearanceCard(themeMode: ThemeMode, onPick: (ThemeMode) -> Unit) {
+    val options = ThemeMode.entries
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Text(
+                text = "Appearance",
+                style = MaterialTheme.typography.titleMedium,
+                color = MaterialTheme.colorScheme.onSurface,
+            )
+            Text(
+                text = "System follows your device setting.",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+            SingleChoiceSegmentedButtonRow(modifier = Modifier.fillMaxWidth()) {
+                options.forEachIndexed { index, mode ->
+                    SegmentedButton(
+                        selected = mode == themeMode,
+                        onClick = { onPick(mode) },
+                        shape = SegmentedButtonDefaults.itemShape(
+                            index = index,
+                            count = options.size,
+                        ),
+                    ) { Text(displayName(mode)) }
+                }
+            }
+        }
+    }
+}
+
+private fun displayName(mode: ThemeMode): String = when (mode) {
+    ThemeMode.SYSTEM -> "System"
+    ThemeMode.LIGHT -> "Light"
+    ThemeMode.DARK -> "Dark"
+}
+
 @Composable
 private fun AboutCard() {
     ElevatedCard(modifier = Modifier.fillMaxWidth()) {