Clean up UTM card column headers and hide them during loading

Remove the redundant left column title (already shown in the category
dropdown) and hide column headers while data is loading.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: adalpari

WordPress/src/main/java/org/wordpress/android/ui/newstats/utm/UtmCard.kt

@@ -25,6 +25,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import org.wordpress.android.R
 import org.wordpress.android.ui.newstats.components.CardPosition
@@ -33,7 +34,6 @@ import org.wordpress.android.ui.newstats.components.StatsCardContainer
 import org.wordpress.android.ui.newstats.components.StatsCardEmptyContent
 import org.wordpress.android.ui.newstats.components.StatsCardErrorContent
 import org.wordpress.android.ui.newstats.components.StatsCardHeader
-import org.wordpress.android.ui.newstats.components.StatsListHeader
 import org.wordpress.android.ui.newstats.util.ShimmerBox
 
 private val CardPadding = 16.dp
@@ -131,11 +131,6 @@ private fun LoadingContent(
             onSelected = onCategoryChanged
         )
         Spacer(modifier = Modifier.height(12.dp))
-        StatsListHeader(
-            leftHeaderResId =
-                selectedCategory.labelResId
-        )
-        Spacer(modifier = Modifier.height(8.dp))
         repeat(LOADING_ITEM_COUNT) { index ->
             Row(
                 modifier = Modifier
@@ -199,9 +194,14 @@ private fun LoadedContent(
         if (state.items.isEmpty()) {
             StatsCardEmptyContent()
         } else {
-            StatsListHeader(
-                leftHeaderResId =
-                    selectedCategory.labelResId
+            Text(
+                text = stringResource(
+                    R.string.stats_countries_views_header
+                ),
+                modifier = Modifier.fillMaxWidth(),
+                textAlign = TextAlign.End,
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
             )
             Spacer(modifier = Modifier.height(8.dp))