Created KiwixSnackToastTheme to manage the theme of Toast and Snackbar messages separately from the app's main theme, ensuring consistency and preventing unintended style changes.

* Minor refinement in showing the `NoFileView`.

app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/local/LocalLibraryScreen.kt

@@ -46,6 +46,7 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import org.kiwix.kiwixmobile.R.string
@@ -64,6 +65,7 @@ import org.kiwix.kiwixmobile.core.ui.theme.KiwixTheme
 import org.kiwix.kiwixmobile.core.ui.theme.White
 import org.kiwix.kiwixmobile.core.utils.ComposeDimens.EIGHT_DP
 import org.kiwix.kiwixmobile.core.utils.ComposeDimens.FAB_ICON_BOTTOM_MARGIN
+import org.kiwix.kiwixmobile.core.utils.ComposeDimens.FOUR_DP
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.adapter.BooksOnDiskListItem
 import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.adapter.BooksOnDiskListItem.BookOnDisk
 import org.kiwix.kiwixmobile.ui.BookItem
@@ -207,13 +209,14 @@ fun NoFilesView(
   onDownloadButtonClick: () -> Unit
 ) {
   Column(
-    modifier = Modifier.fillMaxSize(),
+    modifier = Modifier.fillMaxSize().padding(horizontal = FOUR_DP),
     horizontalAlignment = Alignment.CenterHorizontally,
     verticalArrangement = Arrangement.Center
   ) {
     Text(
       text = noFilesViewItem.first,
-      style = MaterialTheme.typography.titleLarge.copy(fontWeight = FontWeight.Medium)
+      style = MaterialTheme.typography.titleLarge.copy(fontWeight = FontWeight.Medium),
+      textAlign = TextAlign.Center
     )
     Spacer(modifier = Modifier.height(EIGHT_DP))
     KiwixButton(noFilesViewItem.second, onDownloadButtonClick)

core/src/main/java/org/kiwix/kiwixmobile/core/ui/components/KiwixSnackbarHost.kt

@@ -25,6 +25,7 @@ import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
 import androidx.compose.runtime.Composable
 import org.kiwix.kiwixmobile.core.ui.theme.DenimBlue400
+import org.kiwix.kiwixmobile.core.ui.theme.KiwixSnackToastTheme
 
 /**
  * A custom SnackbarHost for displaying snackbars with theme-aware action button colors.
@@ -37,6 +38,7 @@ import org.kiwix.kiwixmobile.core.ui.theme.DenimBlue400
  */
 @Composable
 fun KiwixSnackbarHost(snackbarHostState: SnackbarHostState) {
+  KiwixSnackToastTheme {
     val actionColor = if (isSystemInDarkTheme()) {
       MaterialTheme.colorScheme.surface
     } else {
@@ -48,4 +50,5 @@ fun KiwixSnackbarHost(snackbarHostState: SnackbarHostState) {
         actionColor = actionColor
       )
     }
+  }
 }

core/src/main/java/org/kiwix/kiwixmobile/core/ui/theme/Theme.kt

@@ -23,6 +23,9 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.text.TextStyle
+import org.kiwix.kiwixmobile.core.utils.ComposeDimens.MEDIUM_BODY_LETTER_SPACING
+import org.kiwix.kiwixmobile.core.utils.ComposeDimens.MEDIUM_BODY_TEXT_SIZE
 
 private val DarkColorScheme = darkColorScheme(
   primary = DenimBlue200,
@@ -95,3 +98,37 @@ fun KiwixDialogTheme(
     typography = KiwixTypography
   )
 }
+
+/**
+ * A custom theme specifically designed for displaying short-lived UI messages,
+ * such as Snackbars, and Toasts.
+ *
+ * This theme overrides the default `bodyMedium` typography to remove bold styling,
+ * ensuring that Snackbar and Toast messages appear in a normal-weight font.
+ *
+ * @param darkTheme Determines whether the theme should use dark mode colors.
+ * Defaults to the system's dark mode setting.
+ * @param content The composable content that will be wrapped with this theme.
+ */
+@Composable
+fun KiwixSnackToastTheme(
+  darkTheme: Boolean = isSystemInDarkTheme(),
+  content: @Composable () -> Unit
+) {
+  val colorScheme = when {
+    darkTheme -> DarkColorScheme
+    else -> LightColorScheme
+  }
+  val snackBarTypography = KiwixTypography.copy(
+    bodyMedium = TextStyle(
+      fontSize = MEDIUM_BODY_TEXT_SIZE,
+      letterSpacing = MEDIUM_BODY_LETTER_SPACING
+    )
+  )
+  MaterialTheme(
+    colorScheme = colorScheme,
+    content = content,
+    shapes = shapes,
+    typography = snackBarTypography
+  )
+}