feat: single-row input, pills inside card, new-chat button

ChatInput redesigned: single row (Plus | Text | Tune | Mic | Send).
Pills hidden by default, expandable via tune icon with slide animation
inside the same GlassSurface card. Shape lg (28dp) instead of pill.

ModePillsRow moved from separate floating row into ChatInput as
pillsContent lambda. Bottom dock scrim simplified.

New Chat button (PenLine icon) added to top bar next to TokenBadge.

LazyColumn bottom padding 260→140dp (dock is now smaller).

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

@@ -737,6 +737,7 @@ fun ChatInput(
     pendingFiles: List<PendingFile> = emptyList(),
     onAddClick: () -> Unit = {},
     onRemoveFile: (String) -> Unit = {},
+    pillsContent: @Composable (() -> Unit)? = null,
     modifier: Modifier = Modifier,
 ) {
     val cs = MaterialTheme.colorScheme
@@ -746,20 +747,20 @@ fun ChatInput(
     val hasContent = value.isNotBlank() || pendingFiles.any { it.uploaded != null }
     val canSend = enabled && hasContent && pendingFiles.none { it.uploading }
 
-    val iconBg = if (isDark) Color.White.copy(alpha = 0.07f) else Color.Black.copy(alpha = 0.05f)
+    var showPills by remember { mutableStateOf(false) }
 
     GlassSurface(
         modifier = modifier
             .fillMaxWidth()
             .padding(horizontal = 16.dp),
-        shape = KaizenShapes.pill,
+        shape = KaizenShapes.lg,
-        tintAlpha = if (isDark) 0.82f else 0.88f,
+        tintAlpha = if (isDark) 0.84f else 0.90f,
         shadowStack = KaizenShadows.level3,
-        cornerRadius = 32.dp,
+        cornerRadius = 28.dp,
     ) {
-        Column(Modifier.padding(horizontal = 14.dp, vertical = 14.dp)) {
+        Column(Modifier.padding(vertical = 10.dp)) {
             if (isRecording) {
-                // Recording state — live waveform replaces the text field
+                Column(Modifier.padding(horizontal = 14.dp)) {
                     VoiceWaveform(amplitude = recordingAmplitude)
                     Spacer(Modifier.height(10.dp))
                     Row(verticalAlignment = Alignment.CenterVertically) {
@@ -774,48 +775,84 @@ fun ChatInput(
                         }
                         Spacer(Modifier.weight(1f))
                     }
+                }
             } else {
+                // Expandable pills row
+                if (pillsContent != null) {
+                    androidx.compose.animation.AnimatedVisibility(
+                        visible = showPills,
+                        enter = androidx.compose.animation.expandVertically() + androidx.compose.animation.fadeIn(),
+                        exit = androidx.compose.animation.shrinkVertically() + androidx.compose.animation.fadeOut(),
+                    ) {
+                        Column {
+                            pillsContent()
+                            Spacer(Modifier.height(6.dp))
+                            Box(
+                                Modifier.fillMaxWidth().padding(horizontal = 14.dp).height(0.5.dp)
+                                    .background(cs.onSurfaceVariant.copy(alpha = 0.10f))
+                            )
+                            Spacer(Modifier.height(8.dp))
+                        }
+                    }
+                }
+
                 if (pendingFiles.isNotEmpty()) {
                     Row(
-                        Modifier.fillMaxWidth().horizontalScroll(rememberScrollState()).padding(bottom = 10.dp),
+                        Modifier.fillMaxWidth().horizontalScroll(rememberScrollState()).padding(start = 14.dp, end = 14.dp, bottom = 8.dp),
                         horizontalArrangement = Arrangement.spacedBy(6.dp),
                     ) {
                         pendingFiles.forEach { pf -> PendingFileChip(pf, onRemove = { onRemoveFile(pf.id) }) }
                     }
                 }
 
-                Box(Modifier.fillMaxWidth().heightIn(min = 48.dp), contentAlignment = Alignment.CenterStart) {
+                // Single-row input: Plus | TextField | Mic | Send/Call
+                Row(
+                    Modifier.fillMaxWidth().padding(horizontal = 10.dp),
+                    verticalAlignment = Alignment.Bottom,
+                ) {
+                    Box(
+                        Modifier.size(38.dp).clip(KaizenShapes.circle).clickable(onClick = onAddClick),
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Icon(KaizenIcons.Plus, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(21.dp))
+                    }
+
+                    Box(
+                        Modifier.weight(1f).heightIn(min = 38.dp).padding(horizontal = 4.dp),
+                        contentAlignment = Alignment.CenterStart,
+                    ) {
                         if (value.isEmpty()) Text(
                             stringResource(R.string.chat_input_placeholder),
-                        color = cs.onSurfaceVariant.copy(alpha = 0.5f),
+                            color = cs.onSurfaceVariant.copy(alpha = 0.45f),
                             fontSize = 16.sp,
                             fontWeight = FontWeight.W300,
                         )
                         BasicTextField(
                             value = value, onValueChange = onValueChange,
                             textStyle = TextStyle(color = cs.onBackground, fontSize = 16.sp, lineHeight = 24.sp, fontWeight = FontWeight.W300),
-                        cursorBrush = SolidColor(accent.primary), maxLines = 6, modifier = Modifier.fillMaxWidth(),
+                            cursorBrush = SolidColor(accent.primary), maxLines = 4, modifier = Modifier.fillMaxWidth(),
                         )
                     }
 
-                Spacer(Modifier.height(10.dp))
+                    if (pillsContent != null) {
-
-                Row(verticalAlignment = Alignment.CenterVertically) {
                         Box(
-                        Modifier.size(42.dp).clip(KaizenShapes.circle).background(iconBg).clickable(onClick = onAddClick),
+                            Modifier.size(38.dp).clip(KaizenShapes.circle).clickable { showPills = !showPills },
                             contentAlignment = Alignment.Center,
                         ) {
-                        Icon(KaizenIcons.Plus, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(22.dp))
+                            Icon(
+                                KaizenIcons.SlidersHorizontal, null,
+                                tint = if (showPills) accent.primary else cs.onSurfaceVariant.copy(alpha = 0.55f),
+                                modifier = Modifier.size(19.dp),
+                            )
                         }
-                    Spacer(Modifier.width(8.dp))
-                    Box(
-                        Modifier.size(42.dp).clip(KaizenShapes.circle).background(iconBg).clickable(onClick = onMicClick),
-                        contentAlignment = Alignment.Center,
-                    ) {
-                        Icon(KaizenIcons.Mic, stringResource(R.string.chat_attachment), tint = cs.onSurfaceVariant, modifier = Modifier.size(22.dp))
                     }
 
-                    Spacer(Modifier.weight(1f))
+                    Box(
+                        Modifier.size(38.dp).clip(KaizenShapes.circle).clickable(onClick = onMicClick),
+                        contentAlignment = Alignment.Center,
+                    ) {
+                        Icon(KaizenIcons.Mic, stringResource(R.string.chat_mic_permission), tint = cs.onSurfaceVariant, modifier = Modifier.size(21.dp))
+                    }
 
                     if (isStreaming) {
                         StopButton(onClick = onStop)

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

@@ -863,7 +863,7 @@ fun ChatScreen(
                                     .then(if (isTablet) Modifier.widthIn(max = 720.dp) else Modifier),
                                 contentPadding = PaddingValues(
                                     top = 100.dp,
-                                    bottom = 260.dp,
+                                    bottom = 140.dp,
                                     start = 16.dp,
                                     end = 16.dp
                                 ),
@@ -1035,6 +1035,18 @@ fun ChatScreen(
                                 Spacer(Modifier.weight(1f))
                                 val ctxLen = models.find { it.id == displayModel }?.context_length ?: 1_000_000
                                 TokenBadge(used = usedTokens, contextLength = ctxLen)
+                                Spacer(Modifier.width(8.dp))
+                                Box(
+                                    Modifier.size(36.dp).clip(KaizenShapes.circle)
+                                        .clickable { haptics.tick(); newChat() },
+                                    contentAlignment = Alignment.Center,
+                                ) {
+                                    Icon(
+                                        KaizenIcons.PenLine, null,
+                                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                                        modifier = Modifier.size(17.dp),
+                                    )
+                                }
                             }
                         }
 
@@ -1089,7 +1101,21 @@ fun ChatScreen(
                                 )
                                 .then(if (isTablet) Modifier.widthIn(max = 720.dp) else Modifier)
                         ) {
-                            Spacer(Modifier.height(if (imeVisible) 6.dp else 24.dp))
+                            Spacer(Modifier.height(if (imeVisible) 4.dp else 12.dp))
+                            ChatInput(
+                                value = input,
+                                onValueChange = { input = it },
+                                onSend = { send(input) },
+                                enabled = !isStreaming,
+                                isStreaming = isStreaming,
+                                onStop = { streamJob?.cancel() },
+                                isRecording = isRecording,
+                                recordingAmplitude = recordingAmplitude,
+                                onMicClick = { toggleRecording() },
+                                pendingFiles = pendingFiles,
+                                onAddClick = { showAttachMenu = !showAttachMenu },
+                                onRemoveFile = { id -> pendingFiles.removeAll { it.id == id } },
+                                pillsContent = {
                                     ModePillsRow(
                                         activeMode = activeMode,
                                         onToggle = { mode ->
@@ -1104,20 +1130,7 @@ fun ChatScreen(
                                         webSearchProvider = webSearchProvider,
                                         onWebSearchProviderChange = { webSearchProvider = it; haptics.tick() },
                                     )
-                            Spacer(Modifier.height(if (imeVisible) 6.dp else 10.dp))
+                                },
-                            ChatInput(
-                                value = input,
-                                onValueChange = { input = it },
-                                onSend = { send(input) },
-                                enabled = !isStreaming,
-                                isStreaming = isStreaming,
-                                onStop = { streamJob?.cancel() },
-                                isRecording = isRecording,
-                                recordingAmplitude = recordingAmplitude,
-                                onMicClick = { toggleRecording() },
-                                pendingFiles = pendingFiles,
-                                onAddClick = { showAttachMenu = !showAttachMenu },
-                                onRemoveFile = { id -> pendingFiles.removeAll { it.id == id } },
                             )
                             Spacer(Modifier.height(if (imeVisible) 4.dp else 16.dp))
                         }