feat: modern attachment menu with round colored icon buttons

Replaced the generic DropdownMenu with a row of three large (56dp)
circular icon buttons: Camera (accent), Gallery (indigo), File (emerald).
Slides in/out with animation above the chat input. Toggle on +.

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

@@ -36,6 +36,7 @@ import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.rounded.Add
+import androidx.compose.material.icons.rounded.CameraAlt
 import androidx.compose.material.icons.rounded.Call
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
@@ -467,6 +468,70 @@ private fun FileChip(attachment: Attachment) {
     }
 }
 
+@Composable
+fun AttachmentMenu(
+    onCamera: () -> Unit,
+    onGallery: () -> Unit,
+    onFile: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val cs = MaterialTheme.colorScheme
+    val accent = LocalKaizenAccent.current
+    val isDark = isSystemInDarkTheme()
+
+    Row(
+        modifier = modifier.fillMaxWidth().padding(horizontal = 32.dp, vertical = 8.dp),
+        horizontalArrangement = Arrangement.SpaceEvenly,
+    ) {
+        AttachOption(
+            icon = Icons.Rounded.CameraAlt,
+            label = stringResource(R.string.attach_camera),
+            tint = accent.primary,
+            bg = accent.primary.copy(alpha = if (isDark) 0.15f else 0.10f),
+            onClick = onCamera,
+        )
+        AttachOption(
+            icon = Icons.Rounded.Image,
+            label = stringResource(R.string.attach_gallery),
+            tint = Color(0xFF6366F1),
+            bg = Color(0xFF6366F1).copy(alpha = if (isDark) 0.15f else 0.10f),
+            onClick = onGallery,
+        )
+        AttachOption(
+            icon = Icons.AutoMirrored.Rounded.InsertDriveFile,
+            label = stringResource(R.string.attach_file),
+            tint = Color(0xFF10B981),
+            bg = Color(0xFF10B981).copy(alpha = if (isDark) 0.15f else 0.10f),
+            onClick = onFile,
+        )
+    }
+}
+
+@Composable
+private fun AttachOption(
+    icon: ImageVector,
+    label: String,
+    tint: Color,
+    bg: Color,
+    onClick: () -> Unit,
+) {
+    val cs = MaterialTheme.colorScheme
+    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+        Box(
+            Modifier
+                .size(56.dp)
+                .clip(KaizenShapes.circle)
+                .background(bg)
+                .clickable(onClick = onClick),
+            contentAlignment = Alignment.Center,
+        ) {
+            Icon(icon, null, tint = tint, modifier = Modifier.size(24.dp))
+        }
+        Spacer(Modifier.height(6.dp))
+        Text(label, color = cs.onSurfaceVariant, fontSize = 12.sp, fontWeight = FontWeight.Medium)
+    }
+}
+
 @Composable
 private fun SendArrow(color: Color) {
     Canvas(Modifier.size(18.dp)) {

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

@@ -72,11 +72,6 @@ import dev.kaizen.app.settings.SettingsScreen
 import dev.kaizen.app.settings.SettingsViewModel
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
-import androidx.compose.material.icons.rounded.CameraAlt
-import androidx.compose.material.icons.rounded.Image
-import androidx.compose.material.icons.automirrored.rounded.InsertDriveFile
-import androidx.compose.material3.DropdownMenu
-import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.lifecycle.compose.LifecycleResumeEffect
@@ -545,37 +540,26 @@ fun ChatScreen(
                                 },
                             )
                             Spacer(Modifier.height(10.dp))
-                            Box {
+                            androidx.compose.animation.AnimatedVisibility(
+                                visible = showAttachMenu,
+                                enter = androidx.compose.animation.fadeIn() + androidx.compose.animation.slideInVertically { it / 2 },
+                                exit = androidx.compose.animation.fadeOut() + androidx.compose.animation.slideOutVertically { it / 2 },
+                            ) {
+                                AttachmentMenu(
+                                    onCamera = { showAttachMenu = false; cameraPicker.launch(null) },
+                                    onGallery = { showAttachMenu = false; filePicker.launch("image/*") },
+                                    onFile = { showAttachMenu = false; filePicker.launch("*/*") },
+                                )
+                            }
                             ChatInput(
                                 value = input,
                                 onValueChange = { input = it },
                                 onSend = { send(input) },
                                 enabled = !isStreaming,
                                 pendingFiles = pendingFiles,
-                                    onAddClick = { showAttachMenu = true },
+                                onAddClick = { showAttachMenu = !showAttachMenu },
                                 onRemoveFile = { id -> pendingFiles.removeAll { it.id == id } },
                             )
-                                DropdownMenu(
-                                    expanded = showAttachMenu,
-                                    onDismissRequest = { showAttachMenu = false },
-                                ) {
-                                    DropdownMenuItem(
-                                        text = { Text(stringResource(R.string.attach_camera)) },
-                                        onClick = { showAttachMenu = false; cameraPicker.launch(null) },
-                                        leadingIcon = { Icon(Icons.Rounded.CameraAlt, null, modifier = Modifier.size(20.dp)) },
-                                    )
-                                    DropdownMenuItem(
-                                        text = { Text(stringResource(R.string.attach_gallery)) },
-                                        onClick = { showAttachMenu = false; filePicker.launch("image/*") },
-                                        leadingIcon = { Icon(Icons.Rounded.Image, null, modifier = Modifier.size(20.dp)) },
-                                    )
-                                    DropdownMenuItem(
-                                        text = { Text(stringResource(R.string.attach_file)) },
-                                        onClick = { showAttachMenu = false; filePicker.launch("*/*") },
-                                        leadingIcon = { Icon(Icons.AutoMirrored.Rounded.InsertDriveFile, null, modifier = Modifier.size(20.dp)) },
-                                    )
-                                }
-                            }
                             Spacer(Modifier.height(16.dp))
                         }