Themes: share app theme colors between desktop and Android (app-themes.css), add theme picker and accent color to the Android app, and add Windows XP, Windows 11, macOS (Liquid Glass) and Cyberpunk 2077 themes with matching terminal schemes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

mobile/android/app/src/main/java/de/mrterm/app/MrTermNative.java

@@ -216,6 +216,23 @@ public class MrTermNative extends Plugin {
         call.resolve();
     }
 
+    // Design: Hintergrund hinter Status-/Navigationsleiste und dunkle bzw. helle Symbole
+    @PluginMethod
+    public void bars(PluginCall call) {
+        final boolean light = Boolean.TRUE.equals(call.getBoolean("light", false));
+        final String color = call.getString("color", "#14161d");
+        getActivity().runOnUiThread(() -> {
+            try {
+                android.view.View parent = (android.view.View) getBridge().getWebView().getParent();
+                parent.setBackgroundColor(android.graphics.Color.parseColor(color));
+                androidx.core.view.WindowInsetsControllerCompat c = androidx.core.view.WindowCompat.getInsetsController(getActivity().getWindow(), parent);
+                c.setAppearanceLightStatusBars(light);
+                c.setAppearanceLightNavigationBars(light);
+            } catch (Exception ignored) {}
+        });
+        call.resolve();
+    }
+
     @PluginMethod
     public void background(PluginCall call) {
         getActivity().runOnUiThread(() -> getActivity().moveTaskToBack(true));