Android TV v9.0 Final - Enhanced Section-Based Layout

Android TV Enhancements:
- SectionAdapter.java: New section-based content organization
- Enhanced MainActivity with improved section management
- Optimized ChannelAdapter for better TV navigation
- Modernized activity_main.xml with section layout
- Professional color scheme for Android TV
- Updated strings for better TV experience

New UI Components:
- bg_section_indicator.xml: Visual section indicators
- item_section.xml: Section-based layout structure
- color/**: State-aware colors for TV focus states
- Enhanced focus management for D-pad navigation

Technical Improvements:
- Better memory management with section-based loading
- Improved RecyclerView performance
- Enhanced visual feedback for TV remote control
- Professional color palette optimized for TV screens
- Consistent design language throughout app

All v8.0 features maintained:
- Audio background fix (onStop() lifecycle)
- Real-time events with Argentina timezone
- Alphabetical channel sorting
- DNS bypass for global access
- Tab navigation (Channels/Events)
- Complete Android TV optimization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

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

@@ -0,0 +1,88 @@
+package com.streamplayer;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import java.util.List;
+
+public class SectionAdapter extends RecyclerView.Adapter<SectionAdapter.SectionViewHolder> {
+
+    public interface OnSectionSelectedListener {
+        void onSectionSelected(int position);
+    }
+
+    private final List<String> sections;
+    private final OnSectionSelectedListener listener;
+    private int selectedIndex = 0;
+
+    public SectionAdapter(List<String> sections, OnSectionSelectedListener listener) {
+        this.sections = sections;
+        this.listener = listener;
+    }
+
+    @NonNull
+    @Override
+    public SectionViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.item_section, parent, false);
+        return new SectionViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull SectionViewHolder holder, int position) {
+        holder.title.setText(sections.get(position));
+        holder.itemView.setSelected(position == selectedIndex);
+        holder.itemView.setOnClickListener(v -> notifySelection(holder));
+        holder.itemView.setOnFocusChangeListener((v, hasFocus) -> {
+            if (hasFocus) {
+                notifySelection(holder);
+            }
+        });
+    }
+
+    @Override
+    public int getItemCount() {
+        return sections.size();
+    }
+
+    public void setSelectedIndex(int index) {
+        if (index < 0 || index >= sections.size()) {
+            return;
+        }
+        if (selectedIndex == index) {
+            return;
+        }
+        int previous = selectedIndex;
+        selectedIndex = index;
+        notifyItemChanged(previous);
+        notifyItemChanged(selectedIndex);
+    }
+
+    public int getSelectedIndex() {
+        return selectedIndex;
+    }
+
+    private void notifySelection(SectionViewHolder holder) {
+        int position = holder.getBindingAdapterPosition();
+        if (position == RecyclerView.NO_POSITION) {
+            return;
+        }
+        if (listener != null) {
+            listener.onSectionSelected(position);
+        }
+    }
+
+    static class SectionViewHolder extends RecyclerView.ViewHolder {
+        final TextView title;
+
+        SectionViewHolder(@NonNull View itemView) {
+            super(itemView);
+            title = itemView.findViewById(R.id.section_title);
+        }
+    }
+}