Fixed: The LeftDrawer automatically opens when we rotate the screen.

* In Compose, when the screen rotates and the screen width is above `600dp`, the `drawerState` is automatically set to `open`. Because of this, the issue was happening.
* Now we are storing the `drawerState` and updating the `leftDrawerState` based on the previously saved value when the orientation changes.
* Fixed: `LongMethod` lint error.

app/src/main/java/org/kiwix/kiwixmobile/main/KiwixMainActivity.kt

@@ -128,7 +128,6 @@ class KiwixMainActivity : CoreMainActivity() {
   private val storageDeviceList = arrayListOf<StorageDevice>()
   private val pendingIntentFlow = MutableStateFlow<Intent?>(null)
 
-  @Suppress("InjectDispatcher")
   @OptIn(ExperimentalMaterial3Api::class)
   override fun onCreate(savedInstanceState: Bundle?) {
     cachedComponent.inject(this)
@@ -146,6 +145,8 @@ class KiwixMainActivity : CoreMainActivity() {
           KiwixDestination.Reader.route
         }
       }
+      RestoreDrawerStateOnOrientationChange()
+      PersistDrawerStateOnChange()
       KiwixMainActivityScreen(
         navController = navController,
         leftDrawerContent = leftDrawerMenu,
@@ -160,8 +161,7 @@ class KiwixMainActivity : CoreMainActivity() {
       LaunchedEffect(navController) {
         navController.addOnDestinationChangedListener(finishActionModeOnDestinationChange)
       }
-      val lifecycleOwner = LocalLifecycleOwner.current
-      val lifecycle = lifecycleOwner.lifecycle
+      val lifecycle = LocalLifecycleOwner.current.lifecycle
       LaunchedEffect(navController, pendingIntent) {
         snapshotFlow { pendingIntent }
           .filterNotNull()
@@ -176,12 +176,17 @@ class KiwixMainActivity : CoreMainActivity() {
       }
       DialogHost(alertDialogShower)
     }
-    lifecycleScope.launch {
-      migrateInternalToPublicAppDirectory()
-    }
+    runMigrations()
     intent?.let {
       pendingIntentFlow.value = it
     }
+  }
+
+  @Suppress("InjectDispatcher")
+  private fun runMigrations() {
+    lifecycleScope.launch {
+      migrateInternalToPublicAppDirectory()
+    }
     // run the migration on background thread to avoid any UI related issues.
     CoroutineScope(Dispatchers.IO).launch {
       if (!sharedPreferenceUtil.prefIsTest) {

core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt

@@ -28,9 +28,14 @@ import androidx.appcompat.app.ActionBarDrawerToggle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.material3.BottomAppBarScrollBehavior
 import androidx.compose.material3.DrawerState
+import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.snapshotFlow
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.core.net.toUri
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.lifecycleScope
@@ -166,6 +171,16 @@ abstract class CoreMainActivity : BaseActivity(), WebViewProvider {
   @Inject
   lateinit var downloadMonitor: DownloadMonitor
 
+  /**
+   * Manages the visibility of the left drawer by tracking its state.
+   * In Compose, when the screen rotates and the screen width is above 600dp,
+   * the drawerState is automatically set to open. This causes unexpected behavior.
+   * To ensure a smooth user experience, we save the drawer state in a boolean so
+   * that it survives configuration changes and is not affected by Compose’s
+   * default implementation.
+   */
+  private var wasLeftDrawerOpen = false
+
   @Suppress("InjectDispatcher")
   override fun onCreate(savedInstanceState: Bundle?) {
     setTheme(R.style.KiwixTheme)
@@ -199,6 +214,38 @@ abstract class CoreMainActivity : BaseActivity(), WebViewProvider {
     leftDrawerMenu.addAll(leftNavigationDrawerMenuItems)
   }
 
+  /**
+   * Restores the drawer state after an orientation change.
+   *
+   * In Compose, rotating the device (especially on large screens) can cause the drawer
+   * to be automatically opened by default. To provide a consistent user experience,
+   * this function syncs the drawer's state (open/closed) with the last known value
+   * stored in [wasLeftDrawerOpen].
+   */
+  @Composable
+  fun RestoreDrawerStateOnOrientationChange() {
+    LaunchedEffect(LocalConfiguration.current.orientation) {
+      if (wasLeftDrawerOpen) {
+        openNavigationDrawer()
+      } else {
+        closeNavigationDrawer()
+      }
+    }
+  }
+
+  /**
+   * Tracks the current drawer state and updates [wasLeftDrawerOpen] whenever the
+   * drawer is opened or closed. This ensures the drawer state is persisted across
+   * configuration changes (e.g., screen rotations) and can be restored later.
+   */
+  @Composable
+  fun PersistDrawerStateOnChange() {
+    LaunchedEffect(leftDrawerState) {
+      snapshotFlow { leftDrawerState.currentValue }
+        .collect { wasLeftDrawerOpen = it == DrawerValue.Open }
+    }
+  }
+
   @Suppress("DEPRECATION")
   override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
     super.onActivityResult(requestCode, resultCode, data)

custom/src/main/java/org/kiwix/kiwixmobile/custom/main/CustomMainActivity.kt

@@ -77,6 +77,8 @@ class CustomMainActivity : CoreMainActivity() {
       navController = rememberNavController()
       leftDrawerState = rememberDrawerState(DrawerValue.Closed)
       uiCoroutineScope = rememberCoroutineScope()
+      RestoreDrawerStateOnOrientationChange()
+      PersistDrawerStateOnChange()
       CustomMainActivityScreen(
         navController = navController,
         leftDrawerContent = leftDrawerMenu,
@@ -96,9 +98,6 @@ class CustomMainActivity : CoreMainActivity() {
           .migrate()
       }
     }
-    if (savedInstanceState != null) {
-      return
-    }
   }
 
   override fun getIconResId() = R.mipmap.ic_launcher