android: input bar — single right icon (PTT when empty, Send when text)

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

@@ -168,15 +168,27 @@ fun InputBar(
         Spacer(Modifier.width(4.dp))
 
         if (isRecording && isRecordingLocked) {
-            /* Locked: cancel + send voice — PTT box replaced by action buttons */
+            /* Locked: cancel + send voice */
             IconButton(onClick = onVoiceCancel) {
                 Text("\u2715", fontSize = 20.sp, color = Color(0xFFE53935))
             }
             IconButton(onClick = onVoiceSend) {
                 Text("\u25B6", fontSize = 20.sp, color = Color(0xFF4CAF50))
             }
+        } else if (!isRecording && text.isNotBlank()) {
+            /* Send button — round, primary color */
+            val sendColor = MaterialTheme.colorScheme.primary
+            Box(
+                modifier = Modifier
+                    .size(44.dp)
+                    .background(sendColor, CircleShape)
+                    .clickable { onSend() },
+                contentAlignment = Alignment.Center
+            ) {
+                Text("\u27A4", fontSize = 22.sp, color = Color.White)
+            }
         } else {
-            /* PTT Box — always present (same identity), just changes appearance */
+            /* PTT Box — podcast/recording, same identity in idle and holding */
             val pttBg = if (isRecording) Color(0xFFE53935) else Color.Transparent
             Box(
                 modifier = Modifier
@@ -221,24 +233,6 @@ fun InputBar(
             ) {
                 Text("\uD83C\uDFA4", fontSize = 20.sp, color = if (isRecording) Color.White else Color.Unspecified)
             }
-
-            if (!isRecording) {
-                Spacer(Modifier.width(4.dp))
-                val sendColor = MaterialTheme.colorScheme.primary
-                val sendEnabled = enabled && text.isNotBlank()
-                Box(
-                    modifier = Modifier
-                        .size(44.dp)
-                        .background(
-                            if (sendEnabled) sendColor else sendColor.copy(alpha = 0.35f),
-                            CircleShape
-                        )
-                        .clickable { if (sendEnabled) onSend() },
-                    contentAlignment = Alignment.Center
-                ) {
-                    Text("\u27A4", fontSize = 22.sp, color = Color.White)
-                }
-            }
         }
     }
 }