fix: v10.1.6 - control remoto DPAD_DOWN y barra scroll visible

Problemas corregidos:

1. Control Remoto - Navegación fuera de eventos
   - Problema: Botón abajo del control remoto iba a canales en último evento
   - Solución: Agregado setOnKeyListener interceptando KEYCODE_DPAD_DOWN
   - Combina scroll listener táctil + manejo de teclas de control remoto
   - Import agregado: android.view.KeyEvent

2. Barra de Scroll Más Visible
   - Thumb: Blanco sólido #FFFFFFFF (antes 80% opacidad)
   - Ancho: 12dp (antes 8dp)
   - Radio: 6dp (antes 4dp)
   - Track oscuro agregado: #1A1A1A
   - scrollbarAlwaysDrawVerticalTrack="true"

Archivos modificados:
- MainActivity.java (OnKeyListener + import KeyEvent)
- scrollbar_vertical.xml (blanco sólido, 12dp)
- activity_main.xml (scrollbarSize, track, alwaysDraw)
- colors.xml (scrollbar_track)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/main/java/com/streamplayer/MainActivity.java

@@ -7,6 +7,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.view.KeyEvent;
 import android.view.View;
 import android.widget.Button;
 import android.widget.ProgressBar;
@@ -188,18 +189,36 @@ public class MainActivity extends AppCompatActivity {
         refreshButton.setVisibility(View.VISIBLE);
         contentList.setLayoutManager(eventLayoutManager);
         contentList.setAdapter(eventAdapter);
-        // Add scroll listener to prevent scrolling from Events to Channels section
+        // Clear existing listeners
         contentList.clearOnScrollListeners();
+
+        // Prevent navigation out of events section via remote control
+        contentList.setOnKeyListener((v, keyCode, event) -> {
+            if (event.getAction() == KeyEvent.ACTION_DOWN) {
+                if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
+                    int totalItemCount = eventLayoutManager.getItemCount();
+                    if (totalItemCount > 0) {
+                        int lastVisiblePosition = eventLayoutManager.findLastVisibleItemPosition();
+                        // Prevent going down if we're at or near the last item
+                        if (lastVisiblePosition >= totalItemCount - 1) {
+                            // Consume the event to prevent navigation
+                            return true;
+                        }
+                    }
+                }
+            }
+            return false;
+        });
+
+        // Also prevent scroll-based navigation
         contentList.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
             public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
                 super.onScrolled(recyclerView, dx, dy);
-                // Only prevent downward scroll when at the last COMPLETELY VISIBLE item
                 if (dy > 0) {  // Scrolling down
                     int totalItemCount = eventLayoutManager.getItemCount();
                     if (totalItemCount > 0) {
                         int lastCompletelyVisiblePosition = eventLayoutManager.findLastCompletelyVisibleItemPosition();
-                        // Only stop scroll if we're at the last completely visible item
                         if (lastCompletelyVisiblePosition == totalItemCount - 1) {
                             recyclerView.stopScroll();
                         }
@@ -207,6 +226,7 @@ public class MainActivity extends AppCompatActivity {
                 }
             }
         });
+
         if (cachedEvents.isEmpty()) {
             loadEvents(false);
         } else {