Add USB services restart warning toggle

app/src/main/java/sh/sar/isodroid/ui/screens/SettingsScreen.kt

@@ -47,6 +47,7 @@ import androidx.compose.material.icons.filled.Folder
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.Notifications
 import androidx.compose.material.icons.filled.Security
+import androidx.compose.material.icons.filled.Warning
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
@@ -58,6 +59,7 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
@@ -115,6 +117,10 @@ fun SettingsScreen(
         )
     }
 
+    // USB warning preference
+    val prefs = remember { context.getSharedPreferences("iso_drive_prefs", android.content.Context.MODE_PRIVATE) }
+    var showUsbWarning by remember { mutableStateOf(!prefs.getBoolean("skip_usb_warning", false)) }
+
     // Re-check permissions when returning to the app
     if (activity != null) {
         androidx.compose.runtime.DisposableEffect(activity) {
@@ -246,6 +252,61 @@ fun SettingsScreen(
 
             HorizontalDivider(modifier = Modifier.padding(horizontal = 16.dp))
 
+            // Warnings section
+            SectionHeader(title = "Warnings")
+
+            Card(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp),
+                colors = CardDefaults.cardColors(
+                    containerColor = MaterialTheme.colorScheme.surfaceVariant
+                )
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(16.dp),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Row(
+                        verticalAlignment = Alignment.CenterVertically,
+                        modifier = Modifier.weight(1f)
+                    ) {
+                        Icon(
+                            imageVector = Icons.Default.Warning,
+                            contentDescription = null,
+                            tint = MaterialTheme.colorScheme.primary,
+                            modifier = Modifier.size(24.dp)
+                        )
+                        Spacer(modifier = Modifier.width(12.dp))
+                        Column {
+                            Text(
+                                text = "USB restart warning",
+                                style = MaterialTheme.typography.titleSmall
+                            )
+                            Spacer(modifier = Modifier.height(4.dp))
+                            Text(
+                                text = "Show warning before mount/unmount about USB service interruption",
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant
+                            )
+                        }
+                    }
+                    Spacer(modifier = Modifier.width(12.dp))
+                    Switch(
+                        checked = showUsbWarning,
+                        onCheckedChange = { enabled ->
+                            showUsbWarning = enabled
+                            prefs.edit().putBoolean("skip_usb_warning", !enabled).apply()
+                        }
+                    )
+                }
+            }
+
+            HorizontalDivider(modifier = Modifier.padding(horizontal = 16.dp))
+
             // About section
             SectionHeader(title = "About")