android: lighten waveform bars (idle: #A0A0B0 70%, playing unplayed: 35% alpha)

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

@@ -134,9 +134,9 @@ private fun VoiceBubble(message: Message, textColor: Color, onPlay: (String, ()
                         val played = i < playedIdx
                         drawRect(
                             color = if (playing) {
-                                if (played) Color(0xFF3390EC) else Color(0xFF3390EC).copy(alpha = 0.25f)
+                                if (played) Color(0xFF3390EC) else Color(0xFF3390EC).copy(alpha = 0.35f)
                             } else {
-                                Color(0xFF888899).copy(alpha = 0.45f)
+                                Color(0xFFA0A0B0).copy(alpha = 0.7f)
                             },
                             topLeft = Offset(x, y),
                             size = Size(barW * 0.75f, barH)