feat: redesign UI with dark glassmorphism theme and Lucide icons

Replace the default Material Design theme with a futuristic dark
glassmorphism aesthetic featuring ambient gradient backgrounds,
translucent glass-effect surfaces, neon cyan/purple accents, and
Lucide icon pack for consistent thin-line iconography.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

android/app/src/main/res/values/themes.xml

@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.PicoClaw" parent="android:Theme.Material.Light.NoActionBar" />
+    <style name="Theme.PicoClaw" parent="android:Theme.Material.NoActionBar">
+        <item name="android:windowBackground">#FF050510</item>
+    </style>
 </resources>

android/core/ui/src/main/java/io/picoclaw/android/core/ui/theme/Color.kt

@@ -2,16 +2,37 @@ package io.picoclaw.android.core.ui.theme
 
 import androidx.compose.ui.graphics.Color
 
-val Purple80 = Color(0xFFD0BCFF)
+// ─── Base Palette ─────────────────────────────────────────────
-val PurpleGrey80 = Color(0xFFCCC2DC)
+val DeepBlack = Color(0xFF050510)
-val Pink80 = Color(0xFFEFB8C8)
+val DarkSurface = Color(0xFF0F0F23)
+val DarkCard = Color(0xFF141428)
 
-val Purple40 = Color(0xFF6650a4)
+// ─── Accent Colors ────────────────────────────────────────────
-val PurpleGrey40 = Color(0xFF625b71)
+val NeonCyan = Color(0xFF00D4FF)
-val Pink40 = Color(0xFF7D5260)
+val ElectricPurple = Color(0xFFA855F7)
+val AccentPink = Color(0xFFEC4899)
 
-val UserBubble = Color(0xFF2196F3)
+// ─── Glassmorphism ────────────────────────────────────────────
-val AgentBubble = Color(0xFF424242)
+val GlassWhite = Color(0x14FFFFFF)
-val ConnectedGreen = Color(0xFF4CAF50)
+val GlassBorder = Color(0x1FFFFFFF)
-val ReconnectingYellow = Color(0xFFFFC107)
+
-val DisconnectedRed = Color(0xFFF44336)
+// ─── Message Bubbles ──────────────────────────────────────────
+val UserBubble = Color(0x1A00D4FF)
+val UserBubbleBorder = Color(0x3300D4FF)
+val AgentBubble = Color(0x14A855F7)
+val AgentBubbleBorder = Color(0x26A855F7)
+
+// ─── Text Colors ──────────────────────────────────────────────
+val TextPrimary = Color(0xFFF0F0FF)
+val TextSecondary = Color(0xB3F0F0FF)
+val TextTertiary = Color(0x66F0F0FF)
+
+// ─── Status Colors ────────────────────────────────────────────
+val ConnectedGreen = Color(0xFF22C55E)
+val ReconnectingYellow = Color(0xFFFBBF24)
+val DisconnectedRed = Color(0xFFEF4444)
+
+// ─── Ambient Gradient Orbs ────────────────────────────────────
+val GradientCyan = Color(0xFF06B6D4)
+val GradientPurple = Color(0xFF7C3AED)
+val GradientPink = Color(0xFFDB2777)

android/core/ui/src/main/java/io/picoclaw/android/core/ui/theme/Theme.kt

@@ -1,45 +1,50 @@
 package io.picoclaw.android.core.ui.theme
 
-import android.os.Build
+import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Shapes
 import androidx.compose.material3.darkColorScheme
-import androidx.compose.material3.dynamicDarkColorScheme
-import androidx.compose.material3.dynamicLightColorScheme
-import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
 
-private val DarkColorScheme = darkColorScheme(
+private val FuturisticDarkScheme = darkColorScheme(
-    primary = Purple80,
+    primary = NeonCyan,
-    secondary = PurpleGrey80,
+    onPrimary = DeepBlack,
-    tertiary = Pink80
+    primaryContainer = NeonCyan.copy(alpha = 0.15f),
+    onPrimaryContainer = NeonCyan,
+    secondary = ElectricPurple,
+    onSecondary = DeepBlack,
+    secondaryContainer = ElectricPurple.copy(alpha = 0.15f),
+    onSecondaryContainer = ElectricPurple,
+    tertiary = AccentPink,
+    onTertiary = DeepBlack,
+    background = DeepBlack,
+    onBackground = TextPrimary,
+    surface = DarkSurface,
+    onSurface = TextPrimary,
+    surfaceVariant = DarkCard,
+    onSurfaceVariant = TextSecondary,
+    outline = GlassBorder,
+    outlineVariant = GlassWhite,
+    error = DisconnectedRed,
+    onError = TextPrimary,
 )
 
-private val LightColorScheme = lightColorScheme(
+private val FuturisticShapes = Shapes(
-    primary = Purple40,
+    small = RoundedCornerShape(8.dp),
-    secondary = PurpleGrey40,
+    medium = RoundedCornerShape(16.dp),
-    tertiary = Pink40
+    large = RoundedCornerShape(24.dp),
+    extraLarge = RoundedCornerShape(28.dp),
 )
 
 @Composable
 fun PicoClawTheme(
-    darkTheme: Boolean = isSystemInDarkTheme(),
-    dynamicColor: Boolean = true,
     content: @Composable () -> Unit
 ) {
-    val colorScheme = when {
-        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
-            val context = LocalContext.current
-            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
-        }
-        darkTheme -> DarkColorScheme
-        else -> LightColorScheme
-    }
-
     MaterialTheme(
-        colorScheme = colorScheme,
+        colorScheme = FuturisticDarkScheme,
         typography = Typography,
+        shapes = FuturisticShapes,
         content = content
     )
 }

android/core/ui/src/main/java/io/picoclaw/android/core/ui/theme/Type.kt

@@ -7,11 +7,60 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.sp
 
 val Typography = Typography(
+    displayLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Light,
+        fontSize = 57.sp,
+        lineHeight = 64.sp,
+        letterSpacing = (-0.25).sp
+    ),
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 20.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 1.sp
+    ),
+    titleMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.8.sp
+    ),
     bodyLarge = TextStyle(
         fontFamily = FontFamily.Default,
         fontWeight = FontWeight.Normal,
         fontSize = 16.sp,
         lineHeight = 24.sp,
+        letterSpacing = 0.3.sp
+    ),
+    bodyMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        letterSpacing = 0.25.sp
+    ),
+    bodySmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 12.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.4.sp
+    ),
+    labelLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        letterSpacing = 0.5.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
         letterSpacing = 0.5.sp
     )
 )

android/feature/chat/build.gradle.kts

@@ -30,6 +30,7 @@ dependencies {
     implementation(libs.compose.ui.tooling.preview)
     implementation(libs.compose.material3)
     implementation(libs.compose.icons.extended)
+    implementation("com.composables:icons-lucide-android:2.2.1")
     implementation(libs.activity.compose)
     implementation(libs.lifecycle.runtime.compose)
     implementation(libs.lifecycle.viewmodel.compose)

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/component/ConnectionBanner.kt

@@ -2,9 +2,11 @@ package io.picoclaw.android.feature.chat.component
 
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.background
+import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
@@ -22,7 +24,7 @@ fun ConnectionBanner(
     modifier: Modifier = Modifier
 ) {
     AnimatedVisibility(visible = connectionState != ConnectionState.CONNECTED) {
-        val (color, text) = when (connectionState) {
+        val (accentColor, text) = when (connectionState) {
             ConnectionState.CONNECTING -> ReconnectingYellow to "Connecting..."
             ConnectionState.RECONNECTING -> ReconnectingYellow to "Reconnecting..."
             ConnectionState.DISCONNECTED -> DisconnectedRed to "Disconnected"
@@ -31,14 +33,24 @@ fun ConnectionBanner(
         Box(
             modifier = modifier
                 .fillMaxWidth()
-                .background(color)
+                .padding(horizontal = 16.dp, vertical = 4.dp)
-                .padding(vertical = 4.dp),
+                .background(
+                    color = accentColor.copy(alpha = 0.1f),
+                    shape = RoundedCornerShape(12.dp)
+                )
+                .border(
+                    width = 0.5.dp,
+                    color = accentColor.copy(alpha = 0.3f),
+                    shape = RoundedCornerShape(12.dp)
+                )
+                .padding(vertical = 8.dp),
             contentAlignment = Alignment.Center
         ) {
             Text(
                 text = text,
-                color = Color.White,
+                color = accentColor,
-                fontSize = 12.sp
+                fontSize = 12.sp,
+                letterSpacing = 0.5.sp
             )
         }
     }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/component/ImagePreview.kt

@@ -1,6 +1,7 @@
 package io.picoclaw.android.feature.chat.component
 
 import android.net.Uri
+import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.padding
@@ -8,8 +9,6 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyRow
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Close
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.runtime.Composable
@@ -17,9 +16,13 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import coil3.compose.AsyncImage
 import io.picoclaw.android.core.domain.model.ImageAttachment
+import io.picoclaw.android.core.ui.theme.GlassBorder
+import io.picoclaw.android.core.ui.theme.TextSecondary
+import com.composables.icons.lucide.R as LucideR
 
 @Composable
 fun ImagePreviewRow(
@@ -30,7 +33,7 @@ fun ImagePreviewRow(
     if (images.isEmpty()) return
 
     LazyRow(
-        modifier = modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+        modifier = modifier.padding(horizontal = 12.dp, vertical = 4.dp),
         horizontalArrangement = Arrangement.spacedBy(8.dp)
     ) {
         itemsIndexed(images) { index, attachment ->
@@ -40,7 +43,12 @@ fun ImagePreviewRow(
                     contentDescription = null,
                     modifier = Modifier
                         .size(64.dp)
-                        .clip(RoundedCornerShape(8.dp)),
+                        .clip(RoundedCornerShape(12.dp))
+                        .border(
+                            width = 0.5.dp,
+                            color = GlassBorder,
+                            shape = RoundedCornerShape(12.dp)
+                        ),
                     contentScale = ContentScale.Crop
                 )
                 IconButton(
@@ -50,9 +58,10 @@ fun ImagePreviewRow(
                         .align(Alignment.TopEnd)
                 ) {
                     Icon(
-                        Icons.Default.Close,
+                        painter = painterResource(LucideR.drawable.lucide_ic_x),
                         contentDescription = "Remove",
-                        modifier = Modifier.size(14.dp)
+                        modifier = Modifier.size(14.dp),
+                        tint = TextSecondary
                     )
                 }
             }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/component/MessageBubble.kt

@@ -1,5 +1,6 @@
 package io.picoclaw.android.feature.chat.component
 
+import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.aspectRatio
@@ -13,7 +14,6 @@ import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.unit.dp
 import coil3.compose.AsyncImage
@@ -23,7 +23,10 @@ import com.mikepenz.markdown.m3.markdownTypography
 import io.picoclaw.android.core.domain.model.ChatMessage
 import io.picoclaw.android.core.domain.model.MessageSender
 import io.picoclaw.android.core.ui.theme.AgentBubble
+import io.picoclaw.android.core.ui.theme.AgentBubbleBorder
+import io.picoclaw.android.core.ui.theme.TextPrimary
 import io.picoclaw.android.core.ui.theme.UserBubble
+import io.picoclaw.android.core.ui.theme.UserBubbleBorder
 import java.io.File
 
 @Composable
@@ -34,22 +37,24 @@ fun MessageBubble(
     val isUser = message.sender == MessageSender.USER
     val alignment = if (isUser) Alignment.CenterEnd else Alignment.CenterStart
     val bubbleColor = if (isUser) UserBubble else AgentBubble
+    val borderColor = if (isUser) UserBubbleBorder else AgentBubbleBorder
     val shape = RoundedCornerShape(
-        topStart = 16.dp,
+        topStart = 20.dp,
-        topEnd = 16.dp,
+        topEnd = 20.dp,
-        bottomStart = if (isUser) 16.dp else 4.dp,
+        bottomStart = if (isUser) 20.dp else 4.dp,
-        bottomEnd = if (isUser) 4.dp else 16.dp
+        bottomEnd = if (isUser) 4.dp else 20.dp
     )
 
     Box(
         modifier = modifier
             .fillMaxWidth()
-            .padding(horizontal = 8.dp, vertical = 2.dp),
+            .padding(horizontal = 12.dp, vertical = 3.dp),
         contentAlignment = alignment
     ) {
         Surface(
             shape = shape,
             color = bubbleColor,
+            border = BorderStroke(0.5.dp, borderColor),
             modifier = Modifier.widthIn(max = 300.dp)
         ) {
             Column(modifier = Modifier.padding(12.dp)) {
@@ -72,9 +77,9 @@ fun MessageBubble(
                 if (message.content.isNotEmpty()) {
                     Markdown(
                         content = message.content,
-                        colors = markdownColor(text = Color.White),
+                        colors = markdownColor(text = TextPrimary),
                         typography = markdownTypography(
-                            paragraph = MaterialTheme.typography.bodyLarge.copy(color = Color.White),
+                            paragraph = MaterialTheme.typography.bodyLarge.copy(color = TextPrimary),
                         ),
                     )
                 }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/component/MessageInput.kt

@@ -1,26 +1,35 @@
 package io.picoclaw.android.feature.chat.component
 
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.material.icons.Icons
+import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.automirrored.filled.Send
-import androidx.compose.material.icons.filled.CameraAlt
-import androidx.compose.material.icons.filled.Image
-import androidx.compose.material.icons.filled.Mic
 import androidx.compose.material3.FilledIconButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
-import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.OutlinedTextFieldDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
+import io.picoclaw.android.core.ui.theme.DeepBlack
+import io.picoclaw.android.core.ui.theme.GlassBorder
+import io.picoclaw.android.core.ui.theme.GlassWhite
+import io.picoclaw.android.core.ui.theme.NeonCyan
+import io.picoclaw.android.core.ui.theme.TextPrimary
+import io.picoclaw.android.core.ui.theme.TextSecondary
+import io.picoclaw.android.core.ui.theme.TextTertiary
+import com.composables.icons.lucide.R as LucideR
 
 @Composable
 fun MessageInput(
@@ -35,32 +44,70 @@ fun MessageInput(
     Row(
         modifier = modifier
             .fillMaxWidth()
-            .padding(horizontal = 8.dp, vertical = 8.dp),
+            .padding(horizontal = 12.dp, vertical = 8.dp)
+            .background(
+                color = GlassWhite,
+                shape = RoundedCornerShape(28.dp)
+            )
+            .border(
+                width = 0.5.dp,
+                color = GlassBorder,
+                shape = RoundedCornerShape(28.dp)
+            )
+            .padding(start = 4.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
         verticalAlignment = Alignment.CenterVertically
     ) {
         IconButton(onClick = onCameraClick) {
-            Icon(Icons.Default.CameraAlt, contentDescription = "Camera")
+            Icon(
+                painter = painterResource(LucideR.drawable.lucide_ic_camera),
+                contentDescription = "Camera",
+                tint = TextSecondary
+            )
         }
         IconButton(onClick = onGalleryClick) {
-            Icon(Icons.Default.Image, contentDescription = "Gallery")
+            Icon(
+                painter = painterResource(LucideR.drawable.lucide_ic_image),
+                contentDescription = "Gallery",
+                tint = TextSecondary
+            )
         }
         IconButton(onClick = onMicClick) {
-            Icon(Icons.Default.Mic, contentDescription = "Voice")
+            Icon(
+                painter = painterResource(LucideR.drawable.lucide_ic_mic),
+                contentDescription = "Voice",
+                tint = TextSecondary
+            )
         }
         OutlinedTextField(
             value = text,
             onValueChange = onTextChanged,
             modifier = Modifier.weight(1f),
-            placeholder = { Text("Message...") },
+            placeholder = { Text("Message...", color = TextTertiary) },
             maxLines = 4,
-            shape = MaterialTheme.shapes.extraLarge
+            shape = RoundedCornerShape(24.dp),
+            colors = OutlinedTextFieldDefaults.colors(
+                focusedBorderColor = Color.Transparent,
+                unfocusedBorderColor = Color.Transparent,
+                focusedContainerColor = Color.Transparent,
+                unfocusedContainerColor = Color.Transparent,
+                cursorColor = NeonCyan,
+                focusedTextColor = TextPrimary,
+                unfocusedTextColor = TextPrimary
+            )
         )
-        Spacer(modifier = Modifier.width(8.dp))
+        Spacer(modifier = Modifier.width(4.dp))
         FilledIconButton(
             onClick = onSendClick,
-            shape = CircleShape
+            shape = CircleShape,
+            colors = IconButtonDefaults.filledIconButtonColors(
+                containerColor = NeonCyan,
+                contentColor = DeepBlack
+            )
         ) {
-            Icon(Icons.AutoMirrored.Filled.Send, contentDescription = "Send")
+            Icon(
+                painter = painterResource(LucideR.drawable.lucide_ic_send_horizontal),
+                contentDescription = "Send"
+            )
         }
     }
 }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/component/StatusIndicator.kt

@@ -16,6 +16,8 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
+import io.picoclaw.android.core.ui.theme.NeonCyan
+import io.picoclaw.android.core.ui.theme.TextSecondary
 
 @Composable
 fun StatusIndicator(
@@ -36,13 +38,13 @@ fun StatusIndicator(
             CircularProgressIndicator(
                 modifier = Modifier.size(14.dp),
                 strokeWidth = 2.dp,
-                color = MaterialTheme.colorScheme.onSurfaceVariant
+                color = NeonCyan
             )
             Spacer(modifier = Modifier.width(8.dp))
             Text(
                 text = label ?: "",
                 style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant
+                color = TextSecondary
             )
         }
     }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/screen/ChatScreen.kt

@@ -7,19 +7,19 @@ import androidx.activity.compose.BackHandler
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.core.content.ContextCompat
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.rememberLazyListState
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Settings
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
@@ -29,11 +29,22 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.core.content.FileProvider
 import io.picoclaw.android.core.domain.model.ImageAttachment
+import io.picoclaw.android.core.ui.theme.DeepBlack
+import io.picoclaw.android.core.ui.theme.GradientCyan
+import io.picoclaw.android.core.ui.theme.GradientPink
+import io.picoclaw.android.core.ui.theme.GradientPurple
+import io.picoclaw.android.core.ui.theme.TextSecondary
 import io.picoclaw.android.feature.chat.ChatEvent
 import io.picoclaw.android.feature.chat.ChatViewModel
+import com.composables.icons.lucide.R as LucideR
 import io.picoclaw.android.feature.chat.component.ConnectionBanner
 import io.picoclaw.android.feature.chat.component.ImagePreviewRow
 import io.picoclaw.android.feature.chat.component.MessageInput
@@ -96,7 +107,6 @@ fun ChatScreen(
         }
     }
 
-    // RECORD_AUDIO permission
     var pendingVoiceStart by remember { mutableStateOf(false) }
 
     val micPermissionLauncher = rememberLauncherForActivityResult(
@@ -119,7 +129,6 @@ fun ChatScreen(
         }
     }
 
-    // Back handler for voice mode
     BackHandler(enabled = uiState.voiceModeState.isActive) {
         viewModel.onEvent(ChatEvent.OnVoiceModeStop)
     }
@@ -152,14 +161,58 @@ fun ChatScreen(
         }
     }
 
-    Box(modifier = Modifier.fillMaxSize()) {
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(DeepBlack)
+            .drawBehind {
+                drawCircle(
+                    brush = Brush.radialGradient(
+                        colors = listOf(
+                            GradientCyan.copy(alpha = 0.07f),
+                            Color.Transparent
+                        ),
+                        center = Offset(size.width * 0.15f, size.height * 0.1f),
+                        radius = size.width * 0.8f
+                    )
+                )
+                drawCircle(
+                    brush = Brush.radialGradient(
+                        colors = listOf(
+                            GradientPurple.copy(alpha = 0.07f),
+                            Color.Transparent
+                        ),
+                        center = Offset(size.width * 0.85f, size.height * 0.9f),
+                        radius = size.width * 0.7f
+                    )
+                )
+                drawCircle(
+                    brush = Brush.radialGradient(
+                        colors = listOf(
+                            GradientPink.copy(alpha = 0.03f),
+                            Color.Transparent
+                        ),
+                        center = Offset(size.width * 0.5f, size.height * 0.5f),
+                        radius = size.width * 0.5f
+                    )
+                )
+            }
+    ) {
         Scaffold(
+            containerColor = Color.Transparent,
             topBar = {
                 TopAppBar(
                     title = { Text("PicoClaw") },
+                    colors = TopAppBarDefaults.topAppBarColors(
+                        containerColor = Color.Transparent
+                    ),
                     actions = {
                         IconButton(onClick = onNavigateToSettings) {
-                            Icon(Icons.Default.Settings, contentDescription = "Settings")
+                            Icon(
+                                painter = painterResource(LucideR.drawable.lucide_ic_settings),
+                                contentDescription = "Settings",
+                                tint = TextSecondary
+                            )
                         }
                     }
                 )

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/screen/SettingsScreen.kt

@@ -1,17 +1,15 @@
-// TTS settings are currently used only within the chat feature, so this screen
-// is placed under feature/chat. If TTS settings become shared across multiple
-// features in the future, consider extracting them into a dedicated feature/settings module.
 package io.picoclaw.android.feature.chat.screen
 
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.ExposedDropdownMenuAnchorType
@@ -21,10 +19,13 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.OutlinedTextFieldDefaults
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Slider
+import androidx.compose.material3.SliderDefaults
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
@@ -34,9 +35,23 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import io.picoclaw.android.core.domain.model.TtsEngineInfo
 import io.picoclaw.android.core.domain.model.TtsVoiceInfo
+import io.picoclaw.android.core.ui.theme.DeepBlack
+import io.picoclaw.android.core.ui.theme.GlassBorder
+import io.picoclaw.android.core.ui.theme.GlassWhite
+import io.picoclaw.android.core.ui.theme.GradientCyan
+import io.picoclaw.android.core.ui.theme.GradientPurple
+import io.picoclaw.android.core.ui.theme.NeonCyan
+import io.picoclaw.android.core.ui.theme.TextPrimary
+import io.picoclaw.android.core.ui.theme.TextSecondary
+import com.composables.icons.lucide.R as LucideR
 import io.picoclaw.android.feature.chat.SettingsViewModel
 import org.koin.androidx.compose.koinViewModel
 
@@ -48,58 +63,102 @@ fun SettingsScreen(
 ) {
     val uiState by viewModel.uiState.collectAsState()
 
-    Scaffold(
+    Box(
-        topBar = {
+        modifier = Modifier
-            TopAppBar(
+            .fillMaxSize()
-                title = { Text("Settings") },
+            .background(DeepBlack)
-                navigationIcon = {
+            .drawBehind {
-                    IconButton(onClick = onNavigateBack) {
+                drawCircle(
-                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Back")
+                    brush = Brush.radialGradient(
+                        colors = listOf(
+                            GradientCyan.copy(alpha = 0.07f),
+                            Color.Transparent
+                        ),
+                        center = Offset(size.width * 0.15f, size.height * 0.1f),
+                        radius = size.width * 0.8f
+                    )
+                )
+                drawCircle(
+                    brush = Brush.radialGradient(
+                        colors = listOf(
+                            GradientPurple.copy(alpha = 0.07f),
+                            Color.Transparent
+                        ),
+                        center = Offset(size.width * 0.85f, size.height * 0.9f),
+                        radius = size.width * 0.7f
+                    )
+                )
+            }
+    ) {
+        Scaffold(
+            containerColor = Color.Transparent,
+            topBar = {
+                TopAppBar(
+                    title = { Text("Settings") },
+                    colors = TopAppBarDefaults.topAppBarColors(
+                        containerColor = Color.Transparent
+                    ),
+                    navigationIcon = {
+                        IconButton(onClick = onNavigateBack) {
+                            Icon(
+                                painter = painterResource(LucideR.drawable.lucide_ic_arrow_left),
+                                contentDescription = "Back",
+                                tint = TextSecondary
+                            )
+                        }
                     }
-                }
+                )
-            )
+            }
-        }
+        ) { padding ->
-    ) { padding ->
+            Column(
-        Column(
+                modifier = Modifier
-            modifier = Modifier
+                    .fillMaxSize()
-                .fillMaxSize()
+                    .padding(padding)
-                .padding(padding)
+                    .padding(16.dp),
-                .padding(16.dp),
+                verticalArrangement = Arrangement.spacedBy(24.dp)
-            verticalArrangement = Arrangement.spacedBy(24.dp)
-        ) {
-            Text("Text-to-Speech", style = MaterialTheme.typography.titleMedium)
-
-            EngineSelector(
-                selectedEngine = uiState.ttsConfig.enginePackageName,
-                engines = uiState.availableEngines,
-                onEngineSelected = viewModel::onEngineSelected
-            )
-
-            VoiceSelector(
-                selectedVoiceName = uiState.ttsConfig.voiceName,
-                voices = uiState.availableVoices,
-                onVoiceSelected = viewModel::onVoiceSelected
-            )
-
-            SliderSetting(
-                label = "Speed",
-                value = uiState.ttsConfig.speechRate,
-                valueRange = 0.5f..2.0f,
-                onValueChangeFinished = viewModel::onSpeechRateChanged
-            )
-
-            SliderSetting(
-                label = "Pitch",
-                value = uiState.ttsConfig.pitch,
-                valueRange = 0.5f..2.0f,
-                onValueChangeFinished = viewModel::onPitchChanged
-            )
-
-            Button(
-                onClick = viewModel::onTestSpeak,
-                enabled = !uiState.isTesting
             ) {
-                Text(if (uiState.isTesting) "Speaking..." else "Test Voice")
+                Text(
+                    "Text-to-Speech",
+                    style = MaterialTheme.typography.titleMedium,
+                    color = NeonCyan
+                )
+
+                EngineSelector(
+                    selectedEngine = uiState.ttsConfig.enginePackageName,
+                    engines = uiState.availableEngines,
+                    onEngineSelected = viewModel::onEngineSelected
+                )
+
+                VoiceSelector(
+                    selectedVoiceName = uiState.ttsConfig.voiceName,
+                    voices = uiState.availableVoices,
+                    onVoiceSelected = viewModel::onVoiceSelected
+                )
+
+                SliderSetting(
+                    label = "Speed",
+                    value = uiState.ttsConfig.speechRate,
+                    valueRange = 0.5f..2.0f,
+                    onValueChangeFinished = viewModel::onSpeechRateChanged
+                )
+
+                SliderSetting(
+                    label = "Pitch",
+                    value = uiState.ttsConfig.pitch,
+                    valueRange = 0.5f..2.0f,
+                    onValueChangeFinished = viewModel::onPitchChanged
+                )
+
+                Button(
+                    onClick = viewModel::onTestSpeak,
+                    enabled = !uiState.isTesting,
+                    colors = ButtonDefaults.buttonColors(
+                        containerColor = NeonCyan,
+                        contentColor = DeepBlack
+                    )
+                ) {
+                    Text(if (uiState.isTesting) "Speaking..." else "Test Voice")
+                }
             }
         }
     }
@@ -127,8 +186,16 @@ private fun EngineSelector(
             value = displayText,
             onValueChange = {},
             readOnly = true,
-            label = { Text("Engine") },
+            label = { Text("Engine", color = TextSecondary) },
             trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded) },
+            colors = OutlinedTextFieldDefaults.colors(
+                focusedBorderColor = NeonCyan.copy(alpha = 0.5f),
+                unfocusedBorderColor = GlassBorder,
+                focusedContainerColor = GlassWhite,
+                unfocusedContainerColor = Color.Transparent,
+                focusedTextColor = TextPrimary,
+                unfocusedTextColor = TextPrimary
+            ),
             modifier = Modifier
                 .menuAnchor(ExposedDropdownMenuAnchorType.PrimaryNotEditable)
                 .fillMaxWidth()
@@ -179,8 +246,16 @@ private fun VoiceSelector(
             value = displayText,
             onValueChange = {},
             readOnly = true,
-            label = { Text("Voice") },
+            label = { Text("Voice", color = TextSecondary) },
             trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded) },
+            colors = OutlinedTextFieldDefaults.colors(
+                focusedBorderColor = NeonCyan.copy(alpha = 0.5f),
+                unfocusedBorderColor = GlassBorder,
+                focusedContainerColor = GlassWhite,
+                unfocusedContainerColor = Color.Transparent,
+                focusedTextColor = TextPrimary,
+                unfocusedTextColor = TextPrimary
+            ),
             modifier = Modifier
                 .menuAnchor(ExposedDropdownMenuAnchorType.PrimaryNotEditable)
                 .fillMaxWidth()
@@ -224,11 +299,11 @@ private fun SliderSetting(
             horizontalArrangement = Arrangement.SpaceBetween,
             verticalAlignment = Alignment.CenterVertically
         ) {
-            Text(label, style = MaterialTheme.typography.bodyLarge)
+            Text(label, style = MaterialTheme.typography.bodyLarge, color = TextPrimary)
             Text(
                 "%.1f".format(localValue),
                 style = MaterialTheme.typography.bodyMedium,
-                color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.7f)
+                color = TextSecondary
             )
         }
         Slider(
@@ -236,7 +311,12 @@ private fun SliderSetting(
             onValueChange = { localValue = it },
             onValueChangeFinished = { onValueChangeFinished(localValue) },
             valueRange = valueRange,
-            steps = 14
+            steps = 14,
+            colors = SliderDefaults.colors(
+                thumbColor = NeonCyan,
+                activeTrackColor = NeonCyan,
+                inactiveTrackColor = GlassWhite
+            )
         )
     }
 }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/voice/VoiceModeOverlay.kt

@@ -14,8 +14,6 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Close
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
@@ -26,9 +24,20 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import io.picoclaw.android.core.domain.model.VoicePhase
+import io.picoclaw.android.core.ui.theme.DeepBlack
+import io.picoclaw.android.core.ui.theme.GradientCyan
+import io.picoclaw.android.core.ui.theme.GradientPurple
+import io.picoclaw.android.core.ui.theme.TextPrimary
+import io.picoclaw.android.core.ui.theme.TextSecondary
+import com.composables.icons.lucide.R as LucideR
 
 @Composable
 fun VoiceModeOverlay(
@@ -45,9 +54,30 @@ fun VoiceModeOverlay(
         Box(
             modifier = modifier
                 .fillMaxSize()
-                .background(MaterialTheme.colorScheme.surface)
+                .background(DeepBlack)
+                .drawBehind {
+                    drawCircle(
+                        brush = Brush.radialGradient(
+                            colors = listOf(
+                                GradientCyan.copy(alpha = 0.1f),
+                                Color.Transparent
+                            ),
+                            center = Offset(size.width * 0.3f, size.height * 0.3f),
+                            radius = size.width * 0.6f
+                        )
+                    )
+                    drawCircle(
+                        brush = Brush.radialGradient(
+                            colors = listOf(
+                                GradientPurple.copy(alpha = 0.1f),
+                                Color.Transparent
+                            ),
+                            center = Offset(size.width * 0.7f, size.height * 0.7f),
+                            radius = size.width * 0.5f
+                        )
+                    )
+                }
         ) {
-            // Close button
             IconButton(
                 onClick = onClose,
                 modifier = Modifier
@@ -55,13 +85,13 @@ fun VoiceModeOverlay(
                     .padding(16.dp)
             ) {
                 Icon(
-                    imageVector = Icons.Default.Close,
+                    painter = painterResource(LucideR.drawable.lucide_ic_x),
-                    contentDescription = "閉じる",
+                    contentDescription = "Close",
-                    modifier = Modifier.size(28.dp)
+                    modifier = Modifier.size(28.dp),
+                    tint = TextSecondary
                 )
             }
 
-            // Center content
             Column(
                 modifier = Modifier
                     .fillMaxSize()
@@ -87,38 +117,34 @@ fun VoiceModeOverlay(
 
                 Spacer(modifier = Modifier.height(32.dp))
 
-                // Phase label
                 Text(
                     text = state.statusText.takeIf { state.phase == VoicePhase.THINKING }
                         ?: phaseLabel(state.phase),
                     style = MaterialTheme.typography.titleMedium,
-                    color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.7f)
+                    color = TextSecondary
                 )
 
                 Spacer(modifier = Modifier.height(24.dp))
 
-                // Recognized text
                 if (state.recognizedText.isNotEmpty()) {
                     Text(
                         text = state.recognizedText,
                         style = MaterialTheme.typography.bodyLarge,
-                        color = MaterialTheme.colorScheme.onSurface,
+                        color = TextPrimary,
                         textAlign = TextAlign.Center
                     )
                 }
 
-                // Response text
                 if (state.responseText.isNotEmpty() && state.phase == VoicePhase.SPEAKING) {
                     Spacer(modifier = Modifier.height(16.dp))
                     Text(
                         text = state.responseText,
                         style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.8f),
+                        color = TextSecondary,
                         textAlign = TextAlign.Center
                     )
                 }
 
-                // Error message
                 if (state.errorMessage != null) {
                     Spacer(modifier = Modifier.height(16.dp))
                     Text(
@@ -135,9 +161,9 @@ fun VoiceModeOverlay(
 
 private fun phaseLabel(phase: VoicePhase): String = when (phase) {
     VoicePhase.IDLE -> ""
-    VoicePhase.LISTENING -> "聞き取り中..."
+    VoicePhase.LISTENING -> "Listening..."
-    VoicePhase.SENDING -> "送信中..."
+    VoicePhase.SENDING -> "Sending..."
-    VoicePhase.THINKING -> "考え中..."
+    VoicePhase.THINKING -> "Thinking..."
-    VoicePhase.SPEAKING -> "話しています..."
+    VoicePhase.SPEAKING -> "Speaking..."
-    VoicePhase.ERROR -> "エラー"
+    VoicePhase.ERROR -> "Error"
 }

android/feature/chat/src/main/java/io/picoclaw/android/feature/chat/voice/VoiceOrb.kt

@@ -22,12 +22,12 @@ import kotlin.math.PI
 import kotlin.math.cos
 import kotlin.math.sin
 
-private val ListeningColor = Color(0xFF4A9EFF)
+private val ListeningColor = Color(0xFF00D4FF)
 private val SendingColor = Color(0xFFFF8C42)
 private val ThinkingColor = Color(0xFFA855F7)
 private val SpeakingColor = Color(0xFF22C55E)
 private val ErrorColor = Color(0xFFEF4444)
-private val IdleColor = Color(0xFF6B7280)
+private val IdleColor = Color(0xFF4A5568)
 
 @Composable
 fun VoiceOrb(