Brain connected Power Analyzer feature

Highlights

• 🧠 Power Analyzer: Freq.Ref sync (CURR or VOLT) now displayed in GUI
• 💡 Optimized layout for small screens
• ⚙️ Clean debug logging and error handling for SCPI
• 🧪 Real-time P, S, Q, PF, Vrms, Irms tracking with auto-refresh
• 📉 Visual PQ heatmap with fading trail

Thanks to all contributors and testers 💥