diff --git a/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Component/Attachment_Bar.kt b/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Component/Attachment_Bar.kt
new file mode 100644
index 0000000..2ae3b3f
--- /dev/null
+++ b/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Component/Attachment_Bar.kt
@@ -0,0 +1,77 @@
+package com.example.login_v3.home.Message.UI.Detail.Message_Component
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+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.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.navigationBarsPadding
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Image
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.blur
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun MessageAttachmentBar(
+    onImageClick: () -> Unit,
+    onCancel: () -> Unit
+) {
+    Box(
+        modifier = Modifier
+            .fillMaxWidth()
+            .navigationBarsPadding()
+            .padding(horizontal = 16.dp, vertical = 8.dp)
+    ) {
+        // 毛玻璃背景與邊框 (與 InputBar 一致)
+        Box(modifier = Modifier.matchParentSize().blur(10.dp))
+        Box(
+            modifier = Modifier
+                .matchParentSize()
+                .background(MaterialTheme.colorScheme.primary, RoundedCornerShape(16.dp))
+                .border(1.dp, Color.White.copy(alpha = 0.3f), RoundedCornerShape(16.dp))
+        )
+
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 16.dp, vertical = 12.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(24.dp)
+        ) {
+            // 圖片選擇按鈕
+            IconButton(onClick = onImageClick) {
+                Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                    Icon(
+                        imageVector = Icons.Default.Image, // 記得引入對應的 Icon
+                        contentDescription = "選擇圖片",
+                        tint = Color.White
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.weight(1f))
+
+            // 關閉/返回輸入框按鈕
+            IconButton(onClick = onCancel) {
+                Icon(
+                    imageVector = Icons.Default.Close,
+                    contentDescription = "返回輸入",
+                    tint = Color.White.copy(alpha = 0.7f)
+                )
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Messaging.kt b/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Messaging.kt
index 06d1857..74e5476 100644
--- a/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Messaging.kt
+++ b/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/Message_Messaging.kt
@@ -95,8 +95,8 @@ sealed interface BottomBarState {
     object Input : BottomBarState                                // 預設：輸入框
     data class ActionMenu(val message: Message) : BottomBarState // 長按：動作選單
     data class EmojiMenu(val message: Message) : BottomBarState  // 單擊：Emoji 工具列
+    object AttachmentMenu : BottomBarState                       // 🎯 新增：附件選單
 }
-
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun MessageMessaging(