ui: tighten the library tab bar and simplify the offline strip

Drop the strip's divider and shorten its label to "Offline mode". Take
the bar's horizontal inset off the scroll container so a tab that is
scrolled half off is cut at the screen edge instead of stopping inside
the bar's gutter; the gear keeps its end padding.

app/src/main/kotlin/com/subtracks/ui/library/LibraryScreen.kt

@@ -50,7 +50,6 @@ import androidx.compose.material3.FilterChip
 import androidx.compose.material3.FilterChipDefaults
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.FloatingActionButtonDefaults
-import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.LocalContentColor
@@ -928,7 +927,7 @@ internal fun LibraryTabs(
                 Modifier
                     .fillMaxWidth()
                     .background(headerColor)
-                    .padding(horizontal = 8.dp, vertical = 2.dp),
+                    .padding(top = 2.dp, end = 8.dp, bottom = 2.dp),
         ) {
             Row(
                 modifier = Modifier.fillMaxWidth(),
@@ -1015,13 +1014,11 @@ private fun OfflineStrip(
     onGoOnline: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    Column(modifier.fillMaxWidth()) {
-        HorizontalDivider(color = MaterialTheme.colorScheme.outlineVariant)
     Surface(
         onClick = onGoOnline,
         color = Color.Transparent,
         contentColor = MaterialTheme.colorScheme.onBackground,
-            modifier = Modifier.fillMaxWidth(),
+        modifier = modifier.fillMaxWidth(),
     ) {
         Row(
             modifier =
@@ -1052,7 +1049,6 @@ private fun OfflineStrip(
         }
     }
 }
-}
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable

app/src/main/res/values/strings.xml

@@ -175,7 +175,7 @@
     <string name="filters">Filters</string>
     <string name="filter_downloaded">Downloaded</string>
     <string name="close_search">Close search</string>
-    <string name="offline_mode_banner">Offline mode — downloads only</string>
+    <string name="offline_mode_banner">Offline mode</string>
     <string name="offline_go_online">Go online</string>
     <string name="shuffle_artist">Shuffle artist</string>