refactor: rename and expand DiscoveryPlatform UI resources

- Rename `DiscoveryPlatformIconMapper.kt` to `DiscoveryPlatformUiResources.kt` to reflect its broader purpose.
- Add `DiscoveryPlatform.toLabel()` extension function to provide localized and formatted display names for platforms.
- Update `HomeRoot` to use the new `toLabel()` function for platform selection UI.
- Adjust platform selection chip styling in the home screen, including smaller icon sizes and refined padding/spacing.

Author: rainxchzed

…ion/utils/DiscoveryPlatformIconMapper.kt …on/utils/DiscoveryPlatformUiResources.ktcore/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/utils/DiscoveryPlatformIconMapper.kt renamed to core/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/utils/DiscoveryPlatformUiResources.kt core/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/utils/DiscoveryPlatformIconMapper.kt renamed to core/presentation/src/commonMain/kotlin/zed/rainxch/core/presentation/utils/DiscoveryPlatformUiResources.kt

@@ -2,6 +2,7 @@ package zed.rainxch.core.presentation.utils
 
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.graphics.vector.ImageVector
+import org.jetbrains.compose.resources.stringResource
 import org.jetbrains.compose.resources.vectorResource
 import zed.rainxch.core.domain.model.DiscoveryPlatform
 import zed.rainxch.githubstore.core.presentation.res.*
@@ -34,3 +35,27 @@ fun DiscoveryPlatform.toIcons(): List<ImageVector> =
             listOf(vectorResource(Res.drawable.ic_platform_linux))
         }
     }
+
+@Composable
+fun DiscoveryPlatform.toLabel(): String =
+    when (this) {
+        DiscoveryPlatform.All -> {
+            stringResource(Res.string.category_all)
+        }
+
+        DiscoveryPlatform.Android -> {
+            "Android"
+        }
+
+        DiscoveryPlatform.Macos -> {
+            "macOS"
+        }
+
+        DiscoveryPlatform.Windows -> {
+            "Windows"
+        }
+
+        DiscoveryPlatform.Linux -> {
+            "Linux"
+        }
+    }

feature/home/presentation/src/commonMain/kotlin/zed/rainxch/home/presentation/HomeRoot.kt

@@ -70,6 +70,7 @@ import zed.rainxch.core.presentation.locals.LocalBottomNavigationLiquid
 import zed.rainxch.core.presentation.theme.GithubStoreTheme
 import zed.rainxch.core.presentation.utils.ObserveAsEvents
 import zed.rainxch.core.presentation.utils.toIcons
+import zed.rainxch.core.presentation.utils.toLabel
 import zed.rainxch.githubstore.core.presentation.res.*
 import zed.rainxch.home.domain.model.HomeCategory
 import zed.rainxch.home.presentation.components.LiquidGlassCategoryChips
@@ -429,15 +430,15 @@ private fun TopAppBar(
                         .clip(RoundedCornerShape(16.dp))
                         .background(MaterialTheme.colorScheme.surfaceContainerHigh)
                         .clickable(onClick = onTogglePlatformPopup)
-                        .padding(vertical = 4.dp, horizontal = 12.dp),
+                        .padding(vertical = 4.dp, horizontal = 8.dp),
                 verticalAlignment = Alignment.CenterVertically,
-                horizontalArrangement = Arrangement.spacedBy(4.dp),
+                horizontalArrangement = Arrangement.spacedBy(2.dp),
             ) {
                 icons.forEach { icon ->
                     Icon(
                         imageVector = icon,
                         contentDescription = null,
-                        modifier = Modifier.size(24.dp),
+                        modifier = Modifier.size(18.dp),
                         tint = MaterialTheme.colorScheme.onSurface,
                     )
                 }
@@ -501,10 +502,7 @@ private fun PlatformsPopup(
                         }
 
                         Text(
-                            text =
-                                platform.name
-                                    .lowercase()
-                                    .replaceFirstChar { it.uppercase() },
+                            text = platform.toLabel(),
                             style = MaterialTheme.typography.titleMedium,
                             fontWeight = FontWeight.Medium,
                             color = MaterialTheme.colorScheme.onBackground,