voice: waveform idle bars lighter (#CCD4 80% — near white)

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/components/MessageBubble.kt

@@ -136,7 +136,7 @@ private fun VoiceBubble(message: Message, textColor: Color, onPlay: (String, ()
                             color = if (playing) {
                                 if (played) Color(0xFF3390EC) else Color(0xFF3390EC).copy(alpha = 0.35f)
                             } else {
-                                Color(0xFFA0A0B0).copy(alpha = 0.7f)
+                                Color(0xFFCCCCD4).copy(alpha = 0.8f)
                             },
                             topLeft = Offset(x, y),
                             size = Size(barW * 0.75f, barH)