fix crash on settings change

Now changing settings globally or per game doesn't crash the app. Works on the fly, without crashing.

app/src/main/java/com/izzy2lost/psx2/MainActivity.java

@@ -825,10 +825,24 @@ public class MainActivity extends AppCompatActivity implements GamesCoverDialogF
     private void updateRendererButtonLabel() {
         MaterialButton btn_bios = findViewById(R.id.btn_bios);
         if (btn_bios != null) {
-            btn_bios.setText(rendererShortLabel(getCurrentRendererPref()));
+            int current = getCurrentRendererPref();
+            try {
+                // Prefer runtime renderer from core to reflect per-game overrides
+                int runtime = NativeApp.getCurrentRenderer();
+                // Only accept expected values
+                if (runtime == -1 || runtime == 12 || runtime == 13 || runtime == 14) {
+                    current = runtime;
+                }
+            } catch (Throwable ignored) {}
+            btn_bios.setText(rendererShortLabel(current));
         }
     }
 
+    // Public minimal UI refresh hook for dialogs
+    public void refreshQuickUi() {
+        updateRendererButtonLabel();
+    }
+
     private void setRendererAndSave(int renderer) {
         SharedPreferences prefs = getSharedPreferences("app_prefs", MODE_PRIVATE);
         prefs.edit().putInt("renderer", renderer).apply();