fix: center text and icons vertically in input capsule

Column gets heightIn(min=64dp) + Arrangement.Center so content
sits in the middle. Placeholder maxLines=1 to prevent overflow dots.

app/src/main/java/dev/kaizen/app/chat/ChatComponents.kt

@@ -758,7 +758,10 @@ fun ChatInput(
         shadowStack = KaizenShadows.level4,
         cornerRadius = 34.dp,
     ) {
-        Column {
+        Column(
+            Modifier.heightIn(min = 64.dp),
+            verticalArrangement = Arrangement.Center,
+        ) {
             if (isRecording) {
                 Column(Modifier.padding(horizontal = 14.dp)) {
                     VoiceWaveform(amplitude = recordingAmplitude)
@@ -809,7 +812,6 @@ fun ChatInput(
                 Row(
                     Modifier
                         .fillMaxWidth()
-                        .heightIn(min = 64.dp)
                         .padding(start = 10.dp, end = 8.dp),
                     verticalAlignment = Alignment.CenterVertically,
                 ) {
@@ -829,6 +831,7 @@ fun ChatInput(
                             color = cs.onSurfaceVariant.copy(alpha = 0.38f),
                             fontSize = 16.sp,
                             fontWeight = FontWeight.W300,
+                            maxLines = 1,
                         )
                         BasicTextField(
                             value = value, onValueChange = onValueChange,