fix(android): StorageCard — simpler OutlinedButton + DropdownMenu

Compile errors on 6ef08ed: ExposedDropdownMenu is an extension on
ExposedDropdownMenuBoxScope and can't be referenced by FQN from
outside a Composable receiver. Rewrote both dropdowns using the
plain OutlinedButton + DropdownMenu pattern wrapped in a small
LabeledDropdown<T> helper, which works without the Scope dance.

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

android/app/src/main/java/com/fabledsword/minstrel/settings/ui/StorageCard.kt

@@ -11,17 +11,14 @@ import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.DropdownMenu
 import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ElevatedCard
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.ExposedDropdownMenuBox
-import androidx.compose.material3.ExposedDropdownMenuDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
-import androidx.compose.material3.TextField
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -122,12 +119,41 @@ private fun UsageRow(usedBytes: Long) {
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun CapDropdown(label: String, value: Long, onSet: (Long) -> Unit) {
-    var expanded by remember { mutableStateOf(false) }
     val selectedLabel = CAP_OPTIONS.firstOrNull { it.first == value }?.second
         ?: formatBytes(value)
+    LabeledDropdown(
+        label = label,
+        selectedLabel = selectedLabel,
+        options = CAP_OPTIONS,
+        onSelect = onSet,
+    )
+}
+
+@Composable
+private fun PrefetchDropdown(value: Int, onSet: (Int) -> Unit) {
+    val selected = if (value in PREFETCH_OPTIONS) value else PREFETCH_OPTIONS[2]
+    LabeledDropdown(
+        label = "Pre-fetch ahead",
+        selectedLabel = "$selected tracks",
+        options = PREFETCH_OPTIONS.map { it to "$it tracks" },
+        onSelect = onSet,
+    )
+}
+
+/**
+ * Label on the left, button-with-current-value on the right that opens
+ * a DropdownMenu of [options]. Used by both Cap and Prefetch selectors.
+ */
+@Composable
+private fun <T> LabeledDropdown(
+    label: String,
+    selectedLabel: String,
+    options: List<Pair<T, String>>,
+    onSelect: (T) -> Unit,
+) {
+    var expanded by remember { mutableStateOf(false) }
     Row(
         modifier = Modifier.fillMaxWidth(),
         verticalAlignment = Alignment.CenterVertically,
@@ -138,73 +164,18 @@ private fun CapDropdown(label: String, value: Long, onSet: (Long) -> Unit) {
             color = MaterialTheme.colorScheme.onSurfaceVariant,
             modifier = Modifier.weight(1f),
         )
-        ExposedDropdownMenuBox(
-            expanded = expanded,
-            onExpandedChange = { expanded = it },
-        ) {
-            TextField(
-                value = selectedLabel,
-                onValueChange = {},
-                readOnly = true,
-                trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded) },
-                modifier = Modifier.menuAnchor(),
-            )
-            ExposedDropdownMenuDefaults.run {
-                androidx.compose.material3.ExposedDropdownMenu(
-                    expanded = expanded,
-                    onDismissRequest = { expanded = false },
-                ) {
-                    CAP_OPTIONS.forEach { (bytes, name) ->
-                        DropdownMenuItem(
-                            text = { Text(name) },
-                            onClick = {
-                                expanded = false
-                                onSet(bytes)
-                            },
-                        )
-                    }
-                }
-            }
-        }
-    }
-}
-
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-private fun PrefetchDropdown(value: Int, onSet: (Int) -> Unit) {
-    var expanded by remember { mutableStateOf(false) }
-    val selected = if (value in PREFETCH_OPTIONS) value else PREFETCH_OPTIONS[2]
-    Row(
-        modifier = Modifier.fillMaxWidth(),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
-        Text(
-            text = "Pre-fetch ahead",
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
-            modifier = Modifier.weight(1f),
-        )
-        ExposedDropdownMenuBox(
-            expanded = expanded,
-            onExpandedChange = { expanded = it },
-        ) {
-            TextField(
-                value = "$selected tracks",
-                onValueChange = {},
-                readOnly = true,
-                trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded) },
-                modifier = Modifier.menuAnchor(),
-            )
-            androidx.compose.material3.ExposedDropdownMenu(
+        OutlinedButton(onClick = { expanded = true }) {
+            Text(selectedLabel)
+            DropdownMenu(
                 expanded = expanded,
                 onDismissRequest = { expanded = false },
             ) {
-                PREFETCH_OPTIONS.forEach { n ->
+                options.forEach { (value, name) ->
                     DropdownMenuItem(
-                        text = { Text("$n tracks") },
+                        text = { Text(name) },
                         onClick = {
                             expanded = false
-                            onSet(n)
+                            onSelect(value)
                         },
                     )
                 }