style: tune lime core to a vibrant, warm yellow-lime shade

src/HUDOverlay.swift

@@ -153,11 +153,11 @@ final class OutwardExpandingOrbView: NSView {
         
         let center = CGPoint(x: bounds.midX, y: bounds.midY)
         
-        // 1. Solid Fresh Lime Inner Core (وسطش لیمویی سالید، کاملاً ثابت و مقتدر)
+        // 1. Solid Warm Yellow-Lime Inner Core (وسطش لیمویی مایل به زرد، کاملاً ثابت و مقتدر)
         coreSolidLayer.bounds = CGRect(x: 0, y: 0, width: baseDiameter, height: baseDiameter)
         coreSolidLayer.position = center
         coreSolidLayer.cornerRadius = baseDiameter / 2.0
-        coreSolidLayer.backgroundColor = NSColor(red: 0.82, green: 0.96, blue: 0.28, alpha: 1.0).cgColor // Solid Fresh Lime (#D2F547)
+        coreSolidLayer.backgroundColor = NSColor(red: 0.94, green: 0.95, blue: 0.20, alpha: 1.0).cgColor // Warm Yellow-Lime (#F0F233)
         layer.addSublayer(coreSolidLayer)
         
         // 2. Outward Expanding Pastel Light Blue Stroke Layer (دورش آبی پاستیلی کمرنگ)