some fixes & improvements

composeApp/src/commonMain/kotlin/dev/meloda/overseerr/App.kt

@@ -1,16 +1,11 @@
 package dev.meloda.overseerr
 
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.width
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import dev.meloda.overseerr.datastore.SettingsController
 import dev.meloda.overseerr.screens.main.MainScreen
@@ -34,18 +29,9 @@ internal fun App() {
         settingsController.loadAppSettings()
     }
 
-    Box(
-        modifier = Modifier.fillMaxSize(),
-        contentAlignment = Alignment.Center
-    ) {
-        AppTheme(themeMode = settings.themeMode) {
-            Surface(
-                modifier = Modifier
-                    .width(360.dp)
-                    .height(640.dp)
-            ) {
-                MainScreen()
-            }
+    AppTheme(themeMode = settings.themeMode) {
+        Surface(modifier = Modifier.fillMaxSize()) {
+            MainScreen()
         }
     }
 }