fix(#23): wire AppTheme preference in MainActivity

app/src/main/java/dev/achmad/ledgerr/ui/base/MainActivity.kt

@@ -8,9 +8,12 @@ import android.view.ViewTreeObserver
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
 import androidx.core.util.Consumer
 import cafe.adriel.voyager.core.screen.Screen
@@ -18,6 +21,9 @@ import cafe.adriel.voyager.core.stack.StackEvent
 import cafe.adriel.voyager.navigator.Navigator
 import cafe.adriel.voyager.navigator.NavigatorDisposeBehavior
 import cafe.adriel.voyager.transitions.ScreenTransition
+import dev.achmad.ledgerr.di.util.inject
+import dev.achmad.ledgerr.domain.preference.AppPreference
+import dev.achmad.ledgerr.domain.preference.AppTheme as AppThemePref
 import dev.achmad.ledgerr.ui.screens.home.HomeScreen
 import dev.achmad.ledgerr.ui.theme.AppTheme
 import kotlinx.coroutines.channels.awaitClose
@@ -53,7 +59,17 @@ class MainActivity : ComponentActivity() {
         enableEdgeToEdge()
 
         setContent {
-            AppTheme {
+            val systemDark = isSystemInDarkTheme()
+            val appThemePref by inject<AppPreference>()
+                .appTheme()
+                .changes()
+                .collectAsState(initial = AppThemePref.SYSTEM)
+            val darkTheme = when (appThemePref) {
+                AppThemePref.LIGHT -> false
+                AppThemePref.DARK -> true
+                AppThemePref.SYSTEM -> systemDark
+            }
+            AppTheme(darkTheme = darkTheme) {
                 val slideDistance = rememberSlideDistance()
                 Navigator(
                     screen = initialScreen,