UI: add positioning guide image back (resource-based)

app/src/main/java/com/mindmachine/mvp/MainActivity.kt

@@ -36,6 +36,7 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.Image
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.Delete
@@ -82,6 +83,7 @@ import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.layout.ContentScale
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
@@ -838,6 +840,16 @@ fun PositioningScreen() {
     ) {
         Text("Positioning Guidance", style = MaterialTheme.typography.headlineSmall, color = MaterialTheme.colorScheme.onBackground)
 
+        Image(
+            painter = painterResource(R.drawable.positioning_guide),
+            contentDescription = "Positioning guide",
+            contentScale = ContentScale.Fit,
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(260.dp)
+                .padding(vertical = 6.dp)
+        )
+
         Text("• Lie on your back in a safe, comfortable place.", color = MaterialTheme.colorScheme.onBackground)
         Text("• Rest the phone across the upper nose/forehead area so it stays stable.", color = MaterialTheme.colorScheme.onBackground)
         Text("• Keep your eyes closed during immersive visual sessions.", color = MaterialTheme.colorScheme.onBackground)