fix ChatInput — restore mic/call toggle, softer send button

Mic (voice recording) stays left next to +. Right side toggles
between AudioLines icon (call, when empty) and send button
(when content). Send button: removed border, translucent gradient,
38dp instead of 44dp.

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

@@ -41,20 +41,25 @@ import dev.kaizen.app.ui.theme.rememberDitherBrush
 
 /** Mesh/blob background: large, heavily blurred color circles that drift slowly. */
 @Composable
-fun MeshBackground(content: @Composable BoxScope.() -> Unit) {
+fun MeshBackground(animateBlobs: Boolean = true, content: @Composable BoxScope.() -> Unit) {
     val dark = isSystemInDarkTheme()
     val accent = LocalKaizenAccent.current
     val base = MaterialTheme.colorScheme.background
-    // Blobs are subtler in light mode.
     val factor = if (dark) 1f else 0.65f
-    val transition = rememberInfiniteTransition(label = "blobs")
-    val drift by transition.animateFloat(
-        initialValue = 0f,
-        targetValue = 1f,
-        animationSpec = infiniteRepeatable(tween(22000, easing = LinearEasing), RepeatMode.Reverse),
-        label = "drift",
-    )
-    // Dither overlay (drawn last, over everything) — kills 8-bit gradient banding.
+
+    val drift = if (animateBlobs) {
+        val transition = rememberInfiniteTransition(label = "blobs")
+        val d by transition.animateFloat(
+            initialValue = 0f,
+            targetValue = 1f,
+            animationSpec = infiniteRepeatable(tween(22000, easing = LinearEasing), RepeatMode.Reverse),
+            label = "drift",
+        )
+        d
+    } else {
+        0.5f
+    }
+
     val ditherBrush = rememberDitherBrush()
     Box(
         Modifier

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

@@ -575,23 +575,30 @@ fun ChatInput(
 
             Row(verticalAlignment = Alignment.CenterVertically) {
                 Box(
-                    Modifier.size(40.dp).clip(KaizenShapes.circle).background(iconBg).clickable(onClick = onAddClick),
+                    Modifier.size(38.dp).clip(KaizenShapes.circle).background(iconBg).clickable(onClick = onAddClick),
                     contentAlignment = Alignment.Center,
                 ) {
-                    Icon(KaizenIcons.Plus, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(20.dp))
+                    Icon(KaizenIcons.Plus, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(19.dp))
                 }
                 Spacer(Modifier.width(8.dp))
                 Box(
-                    Modifier.size(40.dp).clip(KaizenShapes.circle).background(iconBg),
+                    Modifier.size(38.dp).clip(KaizenShapes.circle).background(iconBg),
                     contentAlignment = Alignment.Center,
                 ) {
-                    Icon(KaizenIcons.Mic, stringResource(R.string.chat_call), tint = cs.onSurfaceVariant, modifier = Modifier.size(20.dp))
+                    Icon(KaizenIcons.Mic, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(19.dp))
                 }
 
                 Spacer(Modifier.weight(1f))
 
                 if (hasContent) {
                     SendButton(enabled = canSend, onClick = onSend)
+                } else {
+                    Box(
+                        Modifier.size(38.dp).clip(KaizenShapes.circle).background(iconBg),
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Icon(KaizenIcons.AudioLines, stringResource(R.string.chat_call), tint = cs.onSurfaceVariant, modifier = Modifier.size(19.dp))
+                    }
                 }
             }
         }
@@ -643,20 +650,31 @@ private fun PendingFileChip(pf: PendingFile, onRemove: () -> Unit) {
 @Composable
 private fun SendButton(enabled: Boolean, onClick: () -> Unit) {
     val cs = MaterialTheme.colorScheme
+    val isDark = isSystemInDarkTheme()
     val interaction = remember { MutableInteractionSource() }
     val pressed by interaction.collectIsPressedAsState()
-    val pressScale by animateFloatAsState(if (pressed) 0.86f else 1f, label = "send")
+    val pressScale by animateFloatAsState(if (pressed) 0.88f else 1f, label = "send")
     val accent = LocalKaizenAccent.current
-    val fill = if (enabled) Modifier.background(Brush.linearGradient(listOf(accent.primary, accent.primaryDeep)))
-    else Modifier.background(cs.surface)
+
+    val fill = if (enabled) {
+        Modifier.background(
+            Brush.verticalGradient(
+                listOf(
+                    accent.primary.copy(alpha = if (isDark) 0.85f else 0.80f),
+                    accent.primaryDeep.copy(alpha = if (isDark) 0.90f else 0.85f),
+                )
+            )
+        )
+    } else {
+        Modifier.background(cs.surfaceVariant.copy(alpha = 0.5f))
+    }
 
     Box(
-        Modifier.size(44.dp).scale(pressScale).clip(KaizenShapes.circle).then(fill)
-            .border(1.dp, cs.outline, KaizenShapes.circle)
+        Modifier.size(38.dp).scale(pressScale).clip(KaizenShapes.circle).then(fill)
             .clickable(interactionSource = interaction, indication = null, enabled = enabled, onClick = onClick),
         contentAlignment = Alignment.Center,
     ) {
-        SendArrow(color = if (enabled) accent.onPrimary else cs.onSurfaceVariant)
+        SendArrow(color = if (enabled) accent.onPrimary else cs.onSurfaceVariant.copy(alpha = 0.5f))
     }
 }
 

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

@@ -603,7 +603,7 @@ fun ChatScreen(
                 },
                 gesturesEnabled = true // Allows swiping from the screen's left edge to open the drawer
             ) {
-                MeshBackground {
+                MeshBackground(animateBlobs = messages.isEmpty()) {
                     Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                         // 1. Scrollable Chat Content
                         // Stretches to the full screen, allowing bubbles to scroll cleanly behind the floating bottom dock.

app/src/main/java/dev/kaizen/app/ui/icon/KaizenIcons.kt

@@ -31,6 +31,7 @@ object KaizenIcons {
     // ── Chat ────────────────────────────────────────────────────────────────
     val Mic: ImageVector get()           = Lucide.Mic
     val Paperclip: ImageVector get()     = Lucide.Paperclip
+    val AudioLines: ImageVector get()     = Lucide.AudioLines
     val Plus: ImageVector get()          = Lucide.Plus
     val Send: ImageVector get()          = Lucide.SendHorizontal
     val Sparkles: ImageVector get()      = Lucide.Sparkles

app/src/main/java/dev/kaizen/app/ui/sensor/TiltState.kt

@@ -115,7 +115,7 @@ fun rememberTiltState(): State<Offset> {
                 Lifecycle.Event.ON_START -> {
                     if (!registered) {
                         sensorManager.registerListener(
-                            listener, sensor, SensorManager.SENSOR_DELAY_GAME
+                            listener, sensor, SensorManager.SENSOR_DELAY_UI
                         )
                         registered = true
                     }
@@ -131,7 +131,7 @@ fun rememberTiltState(): State<Offset> {
 
         lifecycle.addObserver(lifecycleObserver)
         if (lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED)) {
-            sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_GAME)
+            sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_UI)
             registered = true
         }