Fixed Issues:

• Terminal capturing keystrokes when unfocused → Added window focus check.
• Holding "E" key freezes UI → Switched to event-based input + debounce.
• "Shop"/"Build" text overlapping mining prompt → Conditional rendering + layout fix.
• Holding "D" in shop (with high Rubble) locks UI → Added purchase cooldown + optimized cost calculations.

✅ Result: Smoother input, cleaner UI, no more freezes.