fix(android): drop AvatarShape enum (detekt MatchingDeclarationName)

DiscoverTiles.kt held only one non-composable top-level decl
(`enum class AvatarShape`), so detekt wanted the file renamed. The
enum had two variants discriminating circle vs. rounded; a Boolean
`circular` arg is the same information with no extra cost — collapses
the `when` into a one-line `if`. Two call sites updated.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/src/main/java/com/fabledsword/minstrel/discover/ui/DiscoverTiles.kt

@@ -30,8 +30,6 @@ import com.composables.icons.lucide.User
 import com.fabledsword.minstrel.models.ArtistSuggestionRef
 import com.fabledsword.minstrel.models.LidarrSearchResultRef
 
-internal enum class AvatarShape { CIRCLE, ROUNDED }
-
 @Composable
 internal fun SuggestionTile(s: ArtistSuggestionRef, onRequest: () -> Unit) {
     Row(
@@ -41,7 +39,7 @@ internal fun SuggestionTile(s: ArtistSuggestionRef, onRequest: () -> Unit) {
         verticalAlignment = Alignment.CenterVertically,
         horizontalArrangement = Arrangement.spacedBy(12.dp),
     ) {
-        Avatar(imageUrl = s.imageUrl, fallback = Lucide.User, shape = AvatarShape.CIRCLE)
+        Avatar(imageUrl = s.imageUrl, fallback = Lucide.User, circular = true)
         Column(modifier = Modifier.weight(1f)) {
             Text(
                 text = s.name,
@@ -78,7 +76,7 @@ internal fun ResultTile(
         verticalAlignment = Alignment.CenterVertically,
         horizontalArrangement = Arrangement.spacedBy(12.dp),
     ) {
-        Avatar(imageUrl = row.imageUrl, fallback = Lucide.Disc3, shape = AvatarShape.ROUNDED)
+        Avatar(imageUrl = row.imageUrl, fallback = Lucide.Disc3, circular = false)
         Column(modifier = Modifier.weight(1f)) {
             Text(
                 text = row.name,
@@ -107,11 +105,8 @@ internal fun ResultTile(
 }
 
 @Composable
-private fun Avatar(imageUrl: String, fallback: ImageVector, shape: AvatarShape) {
-    val clip = when (shape) {
-        AvatarShape.CIRCLE -> CircleShape
-        AvatarShape.ROUNDED -> RoundedCornerShape(6.dp)
-    }
+private fun Avatar(imageUrl: String, fallback: ImageVector, circular: Boolean) {
+    val clip = if (circular) CircleShape else RoundedCornerShape(6.dp)
     Box(
         modifier = Modifier
             .size(56.dp)