diff --git a/client/css/style.css b/client/css/style.css
index 19a25d0..8228d85 100644
--- a/client/css/style.css
+++ b/client/css/style.css
@@ -1665,3 +1665,129 @@ body {
 	left: 100%;
 }
 
+/* Image preview in input */
+/* 输入框图片预览样式 */
+.input-image-preview {
+	position: relative;
+	display: inline-block; /* 改为 inline-block 以便并排显示 */
+	margin: 4px; /* 统一 margin */
+	border-radius: 8px;
+	overflow: visible; /* 允许移除按钮稍微超出 */
+	background: #f8f9fa;
+	border: 1px solid #e9ecef; /* 边框调整 */
+	transition: all 0.2s ease;
+	max-width: 80px; /* 限制预览容器的最大宽度 */
+}
+
+.input-image-preview:hover {
+	border-color: #007bff;
+	transform: translateY(-1px);
+	box-shadow: 0 2px 8px rgba(0, 123, 255, 0.1); /* 调整阴影 */
+}
+
+.input-image-preview-img {
+	display: block;
+	width: 100%; /* 图片宽度充满容器 */
+	height: 60px; /* 固定高度 */
+	object-fit: cover;
+	border-radius: 6px; /* 轻微圆角 */
+}
+
+.input-image-remove-btn {
+	position: absolute;
+	top: -10px; /* 调整位置使其更易点击 */
+	right: -10px; /* 调整位置使其更易点击 */
+	width: 22px; /* 增大点击区域 */
+	height: 22px; /* 增大点击区域 */
+	border: none;
+	border-radius: 50%;
+	background: #dc3545;
+	color: white;
+	font-size: 12px;
+	font-weight: bold;
+	cursor: pointer;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	line-height: 1;
+	transition: all 0.2s ease;
+	box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+
+.input-image-remove-btn:hover {
+	background: #c82333;
+	transform: scale(1.1);
+}
+
+.input-image-remove-btn:active {
+	transform: scale(0.95);
+}
+
+/* Image message in chat bubble */
+/* 聊天气泡中的图片消息样式 */
+.bubble-img {
+	max-width: 300px;
+	width: 100%;
+	height: auto;
+	max-height: 200px;
+	object-fit: contain;
+	border-radius: 8px;
+	cursor: pointer;
+	transition: all 0.2s ease;
+	display: block;
+	margin: 4px 0;
+}
+
+.bubble-img:hover {
+	transform: scale(1.02);
+	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
+.bubble-content .bubble-img:first-child {
+	margin-top: 0;
+}
+
+.bubble-content .bubble-img:last-child {
+	margin-bottom: 0;
+}
+
+/* Mixed content (text + image) */
+/* 混合内容（文字 + 图片）样式 */
+.bubble-content.mixed-content {
+	display: flex;
+	flex-direction: column;
+	gap: 8px;
+}
+
+.bubble-content.mixed-content .message-text {
+	margin: 0;
+}
+
+.bubble-content.mixed-content .bubble-img {
+	margin: 0;
+}
+
+@media (max-width: 768px) {
+	.input-image-preview-img {
+		width: 60px;
+		height: 45px;
+	}
+	
+	.bubble-img {
+		max-width: 250px;
+		max-height: 180px;
+	}
+}
+
+@media (max-width: 480px) {
+	.input-image-preview-img {
+		width: 50px;
+		height: 38px;
+	}
+	
+	.bubble-img {
+		max-width: 200px;
+		max-height: 150px;
+	}
+}
+
diff --git a/client/js/chat.js b/client/js/chat.js
index 5b31a65..5624ee9 100644
--- a/client/js/chat.js
+++ b/client/js/chat.js
@@ -16,6 +16,7 @@ import {
 	$id,
 	createElement,
 	on,
+	off,
 	addClass,
 	removeClass
 } from './util.dom.js';
@@ -56,10 +57,48 @@ export function addMsg(text, isHistory = false, msgType = 'text', timestamp = nu
 	if (!chatArea) return;
 	let className = 'bubble me' + (msgType.includes('_private') ? ' private-message' : '');
 	const date = new Date(ts);
-	const time = date.getHours().toString().padStart(2, '0') + ':' + date.getMinutes().toString().padStart(2, '0');	let contentHtml = '';
-	if (msgType === 'image' || msgType === 'image_private') {
-		const safeImgSrc = escapeHTML(text).replace(/javascript:/gi, '');
-		contentHtml = `<img src="${safeImgSrc}"alt="image"class="bubble-img">`
+	const time = date.getHours().toString().padStart(2, '0') + ':' + date.getMinutes().toString().padStart(2, '0');	let contentHtml = '';	if (msgType === 'image' || msgType === 'image_private') {
+		// Handle image messages (can contain both text and images)
+		if (typeof text === 'object' && text.images && Array.isArray(text.images)) {
+			// New multi-image format: {text: "", images: ["data:image...", "data:image..."]}
+			const messageText = text.text ? textToHTML(text.text) : '';
+			const imageElements = text.images.map(imgData => {
+				const safeImgSrc = escapeHTML(imgData).replace(/javascript:/gi, '');
+				return `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+			}).join('');
+					if (messageText && imageElements) {
+				// Mixed content: text + images
+				contentHtml = `<div class="mixed-content">
+					<div class="message-text">${messageText}</div>
+					${imageElements}
+				</div>`;
+			} else if (imageElements) {
+				// Images only
+				contentHtml = imageElements;
+			} else {
+				// Fallback to text only
+				contentHtml = messageText;
+			}
+		} else if (typeof text === 'object' && text.image) {
+			// Legacy single image format: {text: "", image: "data:image..."}
+			const safeImgSrc = escapeHTML(text.image).replace(/javascript:/gi, '');
+			const messageText = text.text ? textToHTML(text.text) : '';
+			
+			if (messageText) {
+				// Mixed content: text + image
+				contentHtml = `<div class="mixed-content">
+					<div class="message-text">${messageText}</div>
+					<img src="${safeImgSrc}" alt="image" class="bubble-img">
+				</div>`;
+			} else {
+				// Image only
+				contentHtml = `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+			}
+		} else {
+			// Legacy format: plain image data URL
+			const safeImgSrc = escapeHTML(text).replace(/javascript:/gi, '');
+			contentHtml = `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+		}
 	} else if (msgType === 'file' || msgType === 'file_private') {
 		// Handle file messages
 		contentHtml = renderFileMessage(text, true);
@@ -101,10 +140,48 @@ export function addOtherMsg(msg, userName = '', avatar = '', isHistory = false,
 	if (!chatArea) return;
 	const bubbleWrap = createElement('div', {
 		class: 'bubble-other-wrap'
-	});	let contentHtml = '';
-	if (msgType === 'image' || msgType === 'image_private') {
-		const safeImgSrc = escapeHTML(msg).replace(/javascript:/gi, '');
-		contentHtml = `<img src="${safeImgSrc}"alt="image"class="bubble-img">`
+	});	let contentHtml = '';	if (msgType === 'image' || msgType === 'image_private') {
+		// Handle image messages (can contain both text and images)
+		if (typeof msg === 'object' && msg.images && Array.isArray(msg.images)) {
+			// New multi-image format: {text: "", images: ["data:image...", "data:image..."]}
+			const messageText = msg.text ? textToHTML(msg.text) : '';
+			const imageElements = msg.images.map(imgData => {
+				const safeImgSrc = escapeHTML(imgData).replace(/javascript:/gi, '');
+				return `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+			}).join('');
+					if (messageText && imageElements) {
+				// Mixed content: text + images
+				contentHtml = `<div class="mixed-content">
+					<div class="message-text">${messageText}</div>
+					${imageElements}
+				</div>`;
+			} else if (imageElements) {
+				// Images only
+				contentHtml = imageElements;
+			} else {
+				// Fallback to text only
+				contentHtml = messageText;
+			}
+		} else if (typeof msg === 'object' && msg.image) {
+			// Legacy single image format: {text: "", image: "data:image..."}
+			const safeImgSrc = escapeHTML(msg.image).replace(/javascript:/gi, '');
+			const messageText = msg.text ? textToHTML(msg.text) : '';
+			
+			if (messageText) {
+				// Mixed content: text + image
+				contentHtml = `<div class="mixed-content">
+					<div class="message-text">${messageText}</div>
+					<img src="${safeImgSrc}" alt="image" class="bubble-img">
+				</div>`;
+			} else {
+				// Image only
+				contentHtml = `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+			}
+		} else {
+			// Legacy format: plain image data URL
+			const safeImgSrc = escapeHTML(msg).replace(/javascript:/gi, '');
+			contentHtml = `<img src="${safeImgSrc}" alt="image" class="bubble-img">`;
+		}
 	} else if (msgType === 'file' || msgType === 'file_private') {
 		// Handle file messages
 		contentHtml = renderFileMessage(msg, false);	} else {
diff --git a/client/js/main.js b/client/js/main.js
index d097f63..a682e9f 100644
--- a/client/js/main.js
+++ b/client/js/main.js
@@ -10,6 +10,12 @@ import {
 	downloadFile
 } from './util.file.js';
 
+// 从 util.image.js 中导入图片处理功能
+// Import image processing functions from util.image.js
+import {
+	setupImagePaste
+} from './util.image.js';
+
 // 从 util.emoji.js 中导入设置表情选择器的函数
 // Import setupEmojiPicker function from util.emoji.js
 import {
@@ -51,9 +57,11 @@ import {
 // Import chat-related functions from chat.js
 import {
 	addMsg,               // 添加普通消息到聊天窗口 / Add a normal message to chat
+	addOtherMsg,          // 添加其他用户消息 / Add message from other users
 	addSystemMsg,         // 添加系统消息 / Add a system message
 	setupImagePreview,    // 设置图片预览功能 / Setup image preview
-	setupInputPlaceholder // 设置输入框的占位提示 / Setup placeholder for input box
+	setupInputPlaceholder, // 设置输入框的占位提示 / Setup placeholder for input box
+	autoGrowInput         // 自动调整输入框高度 / Auto adjust input height
 } from './chat.js';
 
 // 从 ui.js 中导入 UI 界面相关的功能
@@ -81,6 +89,7 @@ window.config = {
 // 把一些函数挂载到 window 对象上供其他模块使用
 // Expose functions to the global window object for accessibility
 window.addSystemMsg = addSystemMsg;
+window.addOtherMsg = addOtherMsg;
 window.joinRoom = joinRoom;
 window.notifyMessage = notifyMessage;
 window.setupEmojiPicker = setupEmojiPicker;
@@ -137,8 +146,12 @@ window.addEventListener('DOMContentLoaded', () => {
 	}
 	// 点击其他地方时关闭设置面板 (已移除，因为现在使用侧边栏形式)
 	// Close settings panel when clicking outside (removed since we now use sidebar format)
-
 	const input = document.querySelector('.input-message-input'); // 消息输入框 / Message input box
+	
+	// 设置图片粘贴功能
+	// Setup image paste functionality
+	const imagePasteHandler = setupImagePaste('.input-message-input');
+	
 	if (input) {
 		input.focus(); // 自动聚焦 / Auto focus
 		input.addEventListener('keydown', (e) => {
@@ -146,45 +159,108 @@ window.addEventListener('DOMContentLoaded', () => {
 			// Pressing Enter (without Shift) sends the message
 			if (e.key === 'Enter' && !e.shiftKey) {
 				e.preventDefault();
-				const text = input.innerText.trim(); // 获取输入的文本 / Get input text
-				const rd = roomsData[activeRoomIndex]; // 当前房间数据 / Current room data
-				if (text && rd && rd.chat) {
-					if (rd.privateChatTargetId) {
-						// 私聊消息加密并发送
-						// Encrypt and send private message
-						const targetClient = rd.chat.channel[rd.privateChatTargetId];
-						if (targetClient && targetClient.shared) {
-							const clientMessagePayload = {
-								a: 'm',
-								t: 'text_private',
-								d: text
-							};
-							const encryptedClientMessage = rd.chat.encryptClientMessage(clientMessagePayload, targetClient.shared);
-							const serverRelayPayload = {
-								a: 'c',
-								p: encryptedClientMessage,
-								c: rd.privateChatTargetId
-							};
-							const encryptedMessageForServer = rd.chat.encryptServerMessage(serverRelayPayload, rd.chat.serverShared);
-							rd.chat.sendMessage(encryptedMessageForServer);
-							addMsg(text, false, 'text_private');
-						} else {
-							addSystemMsg(`Cannot send private message to ${rd.privateChatTargetName}.User might not be fully connected.`)
-						}
-					} else {
-						// 公共频道消息发送
-						// Send public message
-						rd.chat.sendChannelMessage('text', text);
-						addMsg(text);
-					}
-					// 清空输入框并触发 input 事件
-					// Clear input and trigger input event
-					input.innerText = '';
-					input.dispatchEvent(new Event('input'));
-				}
+				sendMessage();
 			}
 		});
 	}
+	
+	// 发送消息的统一函数
+	// Unified function to send messages
+	function sendMessage() {
+		const text = input.innerText.trim(); // 获取输入的文本 / Get input text
+		const images = imagePasteHandler ? imagePasteHandler.getCurrentImages() : []; // 获取所有图片
+
+		if (!text && images.length === 0) return; // 如果没有文本且没有图片，则不发送
+		const rd = roomsData[activeRoomIndex]; // 当前房间数据 / Current room data
+		
+		if (rd && rd.chat) {
+			if (images.length > 0) {
+				// 发送包含图片的消息 (支持多图和文字合并)
+				// Send message with images (supports multiple images and text combined)
+				const messageContent = {
+					text: text || '', // 包含文字内容，如果有的话
+					images: images    // 包含所有图片数据
+				};
+
+				if (rd.privateChatTargetId) {
+					// 私聊图片消息加密并发送
+					// Encrypt and send private image message
+					const targetClient = rd.chat.channel[rd.privateChatTargetId];
+					if (targetClient && targetClient.shared) {
+						const clientMessagePayload = {
+							a: 'm',
+							t: 'image_private',
+							d: messageContent
+						};
+						const encryptedClientMessage = rd.chat.encryptClientMessage(clientMessagePayload, targetClient.shared);
+						const serverRelayPayload = {
+							a: 'c',
+							p: encryptedClientMessage,
+							c: rd.privateChatTargetId
+						};
+						const encryptedMessageForServer = rd.chat.encryptServerMessage(serverRelayPayload, rd.chat.serverShared);
+						rd.chat.sendMessage(encryptedMessageForServer);
+						addMsg(messageContent, false, 'image_private');
+					} else {
+						addSystemMsg(`Cannot send private message to ${rd.privateChatTargetName}.User might not be fully connected.`)
+					}
+				} else {
+					// 公共频道图片消息发送
+					// Send image message to public channel
+					rd.chat.sendChannelMessage('image', messageContent);
+					addMsg(messageContent, false, 'image');
+				}
+				
+				imagePasteHandler.clearImages(); // 清除所有图片预览
+			} else if (text) {
+				// 发送纯文本消息
+				// Send text-only message
+				if (rd.privateChatTargetId) {
+					// 私聊消息加密并发送
+					// Encrypt and send private message
+					const targetClient = rd.chat.channel[rd.privateChatTargetId];
+					if (targetClient && targetClient.shared) {
+						const clientMessagePayload = {
+							a: 'm',
+							t: 'text_private',
+							d: text
+						};
+						const encryptedClientMessage = rd.chat.encryptClientMessage(clientMessagePayload, targetClient.shared);
+						const serverRelayPayload = {
+							a: 'c',
+							p: encryptedClientMessage,
+							c: rd.privateChatTargetId
+						};
+						const encryptedMessageForServer = rd.chat.encryptServerMessage(serverRelayPayload, rd.chat.serverShared);
+						rd.chat.sendMessage(encryptedMessageForServer);
+						addMsg(text, false, 'text_private');
+					} else {
+						addSystemMsg(`Cannot send private message to ${rd.privateChatTargetName}.User might not be fully connected.`)
+					}
+				} else {
+					// 公共频道消息发送
+					// Send public message
+					rd.chat.sendChannelMessage('text', text);
+					addMsg(text);				}
+			}
+			
+			// 清空输入框并触发 input 事件
+			// Clear input and trigger input event
+			input.innerHTML = ''; // 清空输入框内容 / Clear input field content
+			if (imagePasteHandler && typeof imagePasteHandler.refreshPlaceholder === 'function') {
+				imagePasteHandler.refreshPlaceholder(); // 更新 placeholder 状态
+			}
+			autoGrowInput(); // 调整输入框高度
+		}
+	}
+	
+	// 为发送按钮添加点击事件
+	// Add click event for send button
+	const sendButton = document.querySelector('.send-message-btn');
+	if (sendButton) {
+		sendButton.addEventListener('click', sendMessage);
+	}
+	
 	// 设置发送文件功能
 	// Setup file sending functionality
 	setupFileSend({
@@ -230,10 +306,10 @@ window.addEventListener('DOMContentLoaded', () => {
 						addMsg(message, false, 'file');
 					}
 				}
-			}
-		}
+			}		}
 	});
 
+
 	// 判断是否为移动端
 	// Check if the device is mobile
 	const isMobile = () => window.innerWidth <= 768;
diff --git a/client/js/room.js b/client/js/room.js
index f5af706..00117c1 100644
--- a/client/js/room.js
+++ b/client/js/room.js
@@ -244,7 +244,6 @@ export function handleClientMessage(idx, msg) {
 	}
 	
 	let msgType = msg.type || 'text';
-	
 	// Handle file messages
 	if (msgType.startsWith('file_')) {
 		// Import handleFileMessage function if needed
@@ -252,22 +251,14 @@ export function handleClientMessage(idx, msg) {
 			window.handleFileMessage(msg.data, msgType.includes('_private'));
 		}
 		
-		// Only add file_start messages to chat history
+		// Send notification but don't add to messages array
+		// (util.file.js already handles display via addOtherMsg)
 		if (msgType === 'file_start' || msgType === 'file_start_private') {
 			let realUserName = msg.userName;
 			if (!realUserName && msg.clientId && newRd.userMap[msg.clientId]) {
 				realUserName = newRd.userMap[msg.clientId].userName || newRd.userMap[msg.clientId].username || newRd.userMap[msg.clientId].name
 			}
 			
-			roomsData[idx].messages.push({
-				type: 'other',
-				text: msg.data,
-				userName: realUserName,
-				avatar: realUserName,
-				msgType: msgType.includes('_private') ? 'file_private' : 'file',
-				timestamp: Date.now()
-			});
-			
 			const notificationMsgType = msgType.includes('_private') ? 'private file' : 'file';
 			if (window.notifyMessage) {
 				window.notifyMessage(newRd.roomName, notificationMsgType, `${msg.data.fileName}`, realUserName)
@@ -276,30 +267,42 @@ export function handleClientMessage(idx, msg) {
 			if (activeRoomIndex !== idx) {
 				roomsData[idx].unreadCount = (roomsData[idx].unreadCount || 0) + 1;
 				renderRooms(activeRoomIndex)
-			} else {
-				renderChatArea()
 			}
+			// No need to call renderChatArea() since util.file.js handles display
 		}
-		return;
+		return; // Don't process file messages further
 	}
-	
-	// Handle legacy image detection
-	if (!msgType.includes('_private') && msg.data && msg.data.startsWith('data:image/')) {
-		msgType = 'image'
+		// Handle image messages (both new and legacy formats)
+	if (msgType === 'image' || msgType === 'image_private') {
+		// Already has correct type
+	} else if (!msgType.includes('_private')) {
+		// Handle legacy image detection
+		if (msg.data && typeof msg.data === 'string' && msg.data.startsWith('data:image/')) {
+			msgType = 'image';
+		} else if (msg.data && typeof msg.data === 'object' && msg.data.image) {
+			msgType = 'image';
+		}
 	}
-	
 	let realUserName = msg.userName;
 	if (!realUserName && msg.clientId && newRd.userMap[msg.clientId]) {
 		realUserName = newRd.userMap[msg.clientId].userName || newRd.userMap[msg.clientId].username || newRd.userMap[msg.clientId].name
 	}
+	
+	// Add message to messages array for chat history
 	roomsData[idx].messages.push({
 		type: 'other',
 		text: msg.data,
 		userName: realUserName,
 		avatar: realUserName,
-		msgType,
+		msgType: msgType,
 		timestamp: Date.now()
 	});
+	
+	// Add message to chat display using addOtherMsg
+	if (window.addOtherMsg) {
+		window.addOtherMsg(msg.data, realUserName, realUserName, false, msgType);
+	}
+	
 	const notificationMsgType = msgType.includes('_private') ? `private ${msgType.split('_')[0]}` : msgType;
 	if (window.notifyMessage) {
 		window.notifyMessage(newRd.roomName, notificationMsgType, msg.data, realUserName)
@@ -307,8 +310,6 @@ export function handleClientMessage(idx, msg) {
 	if (activeRoomIndex !== idx) {
 		roomsData[idx].unreadCount = (roomsData[idx].unreadCount || 0) + 1;
 		renderRooms(activeRoomIndex)
-	} else {
-		renderChatArea()
 	}
 }
 
diff --git a/client/js/util.image.js b/client/js/util.image.js
new file mode 100644
index 0000000..20479ce
--- /dev/null
+++ b/client/js/util.image.js
@@ -0,0 +1,234 @@
+// Import DOM helpers
+// 导入 DOM 辅助函数
+import {
+	$,
+	on,
+	createElement
+} from './util.dom.js';
+
+// Process and compress image file
+// 处理并压缩图片文件
+export async function processImage(file, callback) {
+	// Create image element for loading file
+	// 创建图片元素用于加载文件
+	const img = new Image();
+	img.onload = function() {
+		const maxW = 1280, // Max width
+			maxH = 1280;    // 最大宽度/高度
+		let w = img.naturalWidth,
+			h = img.naturalHeight;
+		// Resize if too large
+		// 如果图片过大则缩放
+		if (w > maxW || h > maxH) {
+			const scale = Math.min(maxW / w, maxH / h);
+			w = Math.round(w * scale);
+			h = Math.round(h * scale)
+		}
+		// Create canvas for drawing image
+		// 创建画布用于绘制图片
+		const canvas = createElement('canvas');
+		canvas.width = w;
+		canvas.height = h;
+		const ctx = canvas.getContext('2d');
+		ctx.drawImage(img, 0, 0, w, h);
+		let dataUrl;
+		// Export as webp with 90% quality
+		// 导出为 webp，90% 质量
+		dataUrl = canvas.toDataURL('image/webp', 0.90);
+		callback(dataUrl)
+	};
+	// Read file as data URL
+	// 以 dataURL 方式读取文件
+	const reader = new FileReader();
+	reader.onload = function(e) {
+		img.src = e.target.result
+	};
+	reader.readAsDataURL(file)
+}
+
+// Translate message key
+// 翻译消息 key
+function t(key) {
+	const messages = {
+		tooLarge: 'Image is too large (over 8MB)', // 图片过大（超过8MB）
+	};
+	return messages[key] || key
+}
+
+// Create image preview element for input
+// 为输入框创建图片预览元素
+function createImagePreview(dataUrl) {
+	const preview = createElement('div', {
+		class: 'input-image-preview'
+	});
+	
+	const img = createElement('img', {
+		src: dataUrl,
+		class: 'input-image-preview-img'
+	});
+	
+	const removeBtn = createElement('button', {
+		class: 'input-image-remove-btn',
+		type: 'button'
+	}, '×');
+	
+	preview.appendChild(img);
+	preview.appendChild(removeBtn);
+	
+	return { preview, removeBtn };
+}
+
+// Setup image paste functionality
+// 设置图片粘贴功能
+export function setupImagePaste(inputSelector) {
+	const input = $(inputSelector);
+	if (!input) return;
+
+	let currentImageDatas = []; // 支持多张图片
+	const imagePreviewContainer = createElement('div', { class: 'image-preview-container' });
+	input.parentNode.insertBefore(imagePreviewContainer, input);
+
+	// Function to update placeholder visibility
+	function updatePlaceholderVisibility() {
+		const placeholder = input.parentNode.querySelector('.input-field-placeholder');
+		if (!placeholder) return;
+
+		const hasText = input.innerText.trim().length > 0;
+		const hasImages = currentImageDatas.length > 0;
+
+		if (hasText || hasImages) {
+			placeholder.style.opacity = '0';
+			input.classList.remove('is-empty'); // 确保移除 is-empty
+		} else {
+			placeholder.style.opacity = '1';
+			input.classList.add('is-empty'); // 确保添加 is-empty
+		}
+	}
+
+	// Initial check for placeholder
+	updatePlaceholderVisibility();
+
+	// Listen to input events to update placeholder
+	on(input, 'input', updatePlaceholderVisibility);
+	on(input, 'focus', updatePlaceholderVisibility);
+	on(input, 'blur', () => {
+		// Defer blur check slightly to allow click on remove button
+		setTimeout(updatePlaceholderVisibility, 100);
+	});
+
+	on(input, 'paste', function(e) {
+		if (!e.clipboardData) return;
+
+		let imageProcessed = false;
+		for (const item of e.clipboardData.items) {
+			if (item.type.startsWith('image/')) {
+				const file = item.getAsFile();
+				if (!file) continue;
+
+				if (file.size > 8 * 1024 * 1024) {
+					alert(t('tooLarge'));
+					continue;
+				}
+
+				processImage(file, (dataUrl) => {
+					const { preview, removeBtn } = createImagePreview(dataUrl);
+					imagePreviewContainer.appendChild(preview);
+					currentImageDatas.push({ dataUrl, previewElement: preview });
+
+					on(removeBtn, 'click', () => {
+						preview.remove();
+						currentImageDatas = currentImageDatas.filter(img => img.dataUrl !== dataUrl);
+						updatePlaceholderVisibility();
+					});
+					updatePlaceholderVisibility();
+				});
+				imageProcessed = true;
+			}
+		}
+		if (imageProcessed) {
+			e.preventDefault();
+		}
+	});
+	return {
+		getCurrentImages: () => currentImageDatas.map(img => img.dataUrl), // 返回所有图片数据
+		clearImages: () => {
+			imagePreviewContainer.innerHTML = ''; // 清空预览容器
+			currentImageDatas = [];
+			updatePlaceholderVisibility();
+		},
+		refreshPlaceholder: updatePlaceholderVisibility // 暴露 placeholder 更新函数
+	};
+}
+
+// Setup legacy image send functionality (for backward compatibility)
+// 设置旧版图片发送功能（向后兼容）
+export function setupImageSend({
+	inputSelector,
+	attachBtnSelector,
+	fileInputSelector,
+	onSend
+}) {
+	const input = $(inputSelector);
+	const attachBtn = $(attachBtnSelector);
+	const fileInput = $(fileInputSelector);
+	
+	if (fileInput) fileInput.setAttribute('accept', 'image/*');
+	
+	if (attachBtn && fileInput) {
+		// Click attach triggers file input
+		// 点击附件按钮触发文件选择
+		on(attachBtn, 'click', () => fileInput.click());
+		
+		// Handle file input change
+		// 处理文件选择变化
+		on(fileInput, 'change', async function() {
+			if (!fileInput.files || !fileInput.files.length) return;
+			const file = fileInput.files[0];
+			
+			// Only allow image files
+			// 只允许图片文件
+			if (!file.type.startsWith('image/')) return;
+			
+			// Check file size
+			// 检查文件大小
+			if (file.size > 5 * 1024 * 1024) {
+				alert(t('tooLarge'));
+				return
+			}
+			
+			processImage(file, (dataUrl) => {
+				if (typeof onSend === 'function') onSend(dataUrl)
+			});
+			fileInput.value = ''
+		})
+	}
+	
+	if (input) {
+		// Paste image from clipboard
+		// 从剪贴板粘贴图片
+		on(input, 'paste', function(e) {
+			if (!e.clipboardData) return;
+			for (const item of e.clipboardData.items) {
+				// Only handle image type
+				// 只处理图片类型
+				if (item.type.startsWith('image/')) {
+					const file = item.getAsFile();
+					if (!file) continue;
+					
+					// Check file size
+					// 检查文件大小
+					if (file.size > 5 * 1024 * 1024) {
+						alert(t('tooLarge'));
+						continue
+					}
+					
+					processImage(file, (dataUrl) => {
+						if (typeof onSend === 'function') onSend(dataUrl)
+					});
+					e.preventDefault();
+					break
+				}
+			}
+		})
+	}
+}