feat: 前端支持文件附件输入

- 后端 WsInbound::Message 添加 attachments 字段
- ws.rs 将 attachments 转换为 MediaItem
- 前端 MessageInput 支持点击选择和拖拽文件
- 附件预览列表，支持删除
- 文件大小限制 50MB
- 支持所有文件类型

src/client/mod.rs

@@ -209,6 +209,7 @@ pub async fn run(gateway_url: &str) -> Result<(), Box<dyn std::error::Error>> {
                             InputEvent::Message(msg) => {
                                 let inbound = WsInbound::Message {
                                     content: msg.content,
+                                    attachments: Vec::new(),
                                     channel: None,
                                     chat_id: current_session_id.clone(),
                                     sender_id: None,

src/gateway/ws.rs

@@ -1,6 +1,6 @@
 use super::GatewayState;
 use crate::agent::{AgentError, CompositeSystemPromptProvider};
-use crate::bus::InboundMessage;
+use crate::bus::{InboundMessage, MediaItem};
 use crate::command::adapter::{InputAdapter, OutputAdapter};
 use crate::command::adapters::websocket::{WebSocketInputAdapter, WebSocketOutputAdapter};
 use crate::command::context::CommandContext;
@@ -196,6 +196,7 @@ async fn handle_inbound(
     match inbound {
         WsInbound::Message {
             content,
+            attachments,
             chat_id,
             sender_id,
             ..
@@ -213,6 +214,19 @@ async fn handle_inbound(
                 )
                 .await;
 
+            // 将协议层 attachments 转换为内部 MediaItem
+            let media: Vec<MediaItem> = attachments
+                .iter()
+                .map(|a| MediaItem {
+                    path: a.path.clone(),
+                    media_type: a.media_type.clone(),
+                    mime_type: a.mime_type.clone(),
+                    original_key: None,
+                    content_base64: a.content_base64.clone(),
+                    file_name: a.file_name.clone(),
+                })
+                .collect();
+
             state
                 .bus
                 .publish_inbound(InboundMessage {
@@ -221,7 +235,7 @@ async fn handle_inbound(
                     chat_id,
                     content,
                     timestamp: current_timestamp(),
-                    media: Vec::new(),
+                    media,
                     metadata: HashMap::new(),
                     forwarded_metadata: HashMap::new(),
                 })

src/protocol/mod.rs

@@ -55,6 +55,8 @@ pub enum WsInbound {
     #[serde(rename = "message")]
     Message {
         content: String,
+        #[serde(default, skip_serializing_if = "Vec::is_empty")]
+        attachments: Vec<MediaSummary>,
         #[serde(default, skip_serializing_if = "Option::is_none")]
         channel: Option<String>,
         #[serde(default, skip_serializing_if = "Option::is_none")]

web/src/App.tsx

@@ -7,7 +7,7 @@ import { ToolPanel } from './components/Panel/ToolPanel'
 import { ConnectionStatus } from './components/ConnectionStatus'
 import { useWebSocket } from './hooks/useWebSocket'
 import { useChat } from './hooks/useChat'
-import type { ChatMessage, Command } from './types/protocol'
+import type { ChatMessage, Command, Attachment } from './types/protocol'
 
 const WS_URL = 'ws://127.0.0.1:19876/ws'
 
@@ -89,7 +89,7 @@ function App() {
   }, [topics, status, selectTopic, switchTopic, handleCommand, sendMessage]);
 
   const handleSendMessage = useCallback(
-    (content: string) => {
+    (content: string, attachments: Attachment[] = []) => {
       if (isReadOnly || !sessionId) {
         return
       }
@@ -130,6 +130,7 @@ function App() {
         sendMessage({
           type: 'message',
           content,
+          attachments,
           chat_id: chatId,
         })
       }

web/src/components/Chat/ChatContainer.tsx

@@ -1,13 +1,13 @@
 import { MessageList } from './MessageList'
 import { MessageInput } from './MessageInput'
-import type { ChatMessage } from '../../types/protocol'
+import type { ChatMessage, Attachment } from '../../types/protocol'
 
 interface ChatContainerProps {
   messages: ChatMessage[]
   isLoading: boolean
   isReadOnly?: boolean
   channelName?: string
-  onSendMessage: (content: string) => void
+  onSendMessage: (content: string, attachments: Attachment[]) => void
   onNavigateToSubAgent?: (taskId: string, description: string) => void
 }
 

web/src/components/Chat/MessageInput.tsx

@@ -1,8 +1,11 @@
-import { Send, Loader2, Sparkles, Eye } from 'lucide-react'
+import { Send, Loader2, Sparkles, Eye, Paperclip, X, FileIcon, ImageIcon, MusicIcon, VideoIcon } from 'lucide-react'
 import { useState, useRef, useEffect } from 'react'
+import type { Attachment } from '../../types/protocol'
+
+const MAX_FILE_SIZE = 50 * 1024 * 1024 // 50MB
 
 interface MessageInputProps {
-  onSend: (content: string) => void
+  onSend: (content: string, attachments: Attachment[]) => void
   disabled?: boolean
   isLoading?: boolean
   placeholder?: string
@@ -10,6 +13,20 @@ interface MessageInputProps {
   channelName?: string
 }
 
+interface FileAttachment {
+  file: File
+  attachment: Attachment
+  preview?: string // 用于图片预览
+}
+
+// 根据 MIME 类型判断 media_type
+function getMediaType(mimeType: string): string {
+  if (mimeType.startsWith('image/')) return 'image'
+  if (mimeType.startsWith('audio/')) return 'audio'
+  if (mimeType.startsWith('video/')) return 'video'
+  return 'file'
+}
+
 export function MessageInput({
   onSend,
   disabled = false,
@@ -19,7 +36,11 @@ export function MessageInput({
   channelName,
 }: MessageInputProps) {
   const [content, setContent] = useState('')
+  const [attachments, setAttachments] = useState<FileAttachment[]>([])
+  const [isDragging, setIsDragging] = useState(false)
+  const [error, setError] = useState<string | null>(null)
   const textareaRef = useRef<HTMLTextAreaElement>(null)
+  const fileInputRef = useRef<HTMLInputElement>(null)
   const wasLoadingRef = useRef(false)
 
   useEffect(() => {
@@ -38,10 +59,108 @@ export function MessageInput({
     wasLoadingRef.current = isLoading
   }, [isLoading, isReadOnly])
 
+  // 处理文件选择
+  const handleFileSelect = async (files: FileList | null) => {
+    if (!files) return
+    setError(null)
+
+    const newAttachments: FileAttachment[] = []
+    for (const file of Array.from(files)) {
+      // 检查文件大小
+      if (file.size > MAX_FILE_SIZE) {
+        setError(`文件 "${file.name}" 超过 50MB 限制`)
+        continue
+      }
+
+      // 读取文件为 base64
+      const base64 = await readFileAsBase64(file)
+      const mimeType = file.type || 'application/octet-stream'
+      const mediaType = getMediaType(mimeType)
+
+      const attachment: Attachment = {
+        path: file.name,
+        media_type: mediaType,
+        mime_type: mimeType,
+        content_base64: base64,
+        file_name: file.name,
+      }
+
+      const fileAttachment: FileAttachment = {
+        file,
+        attachment,
+        preview: mediaType === 'image' ? base64 : undefined,
+      }
+
+      newAttachments.push(fileAttachment)
+    }
+
+    setAttachments(prev => [...prev, ...newAttachments])
+  }
+
+  // 读取文件为 base64
+  const readFileAsBase64 = (file: File): Promise<string> => {
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader()
+      reader.onload = () => {
+        const result = reader.result as string
+        // 移除 data:xxx;base64, 前缀
+        const base64 = result.split(',')[1]
+        resolve(base64)
+      }
+      reader.onerror = reject
+      reader.readAsDataURL(file)
+    })
+  }
+
+  // 点击附件按钮
+  const handleAttachClick = () => {
+    fileInputRef.current?.click()
+  }
+
+  // 删除附件
+  const handleRemoveAttachment = (index: number) => {
+    setAttachments(prev => prev.filter((_, i) => i !== index))
+  }
+
+  // 拖拽事件
+  const handleDragEnter = (e: React.DragEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    if (!disabled && !isReadOnly) {
+      setIsDragging(true)
+    }
+  }
+
+  const handleDragLeave = (e: React.DragEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    setIsDragging(false)
+  }
+
+  const handleDragOver = (e: React.DragEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+  }
+
+  const handleDrop = (e: React.DragEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+    setIsDragging(false)
+    if (!disabled && !isReadOnly) {
+      handleFileSelect(e.dataTransfer.files)
+    }
+  }
+
   const handleSend = () => {
-    if (content.trim() && !disabled && !isReadOnly) {
+    const hasContent = content.trim() || attachments.length > 0
-      onSend(content.trim())
+    if (hasContent && !disabled && !isReadOnly) {
+      onSend(
+        content.trim(),
+        attachments.map(a => a.attachment)
+      )
       setContent('')
+      setAttachments([])
+      setError(null)
       if (textareaRef.current) {
         textareaRef.current.style.height = 'auto'
       }
@@ -55,6 +174,20 @@ export function MessageInput({
     }
   }
 
+  // 获取附件图标
+  const getAttachmentIcon = (mediaType: string) => {
+    switch (mediaType) {
+      case 'image':
+        return <ImageIcon className="h-4 w-4" />
+      case 'audio':
+        return <MusicIcon className="h-4 w-4" />
+      case 'video':
+        return <VideoIcon className="h-4 w-4" />
+      default:
+        return <FileIcon className="h-4 w-4" />
+    }
+  }
+
   // 只读模式：显示提示占位符
   if (isReadOnly) {
     return (
@@ -85,7 +218,81 @@ export function MessageInput({
 
   return (
     <div className="border-t border-white/8 bg-[#12121a]/80 backdrop-blur-md p-4">
-      <div className="flex gap-3 items-center max-w-5xl mx-auto">
+      <div className="max-w-5xl mx-auto">
+        {/* 错误提示 */}
+        {error && (
+          <div className="mb-2 rounded-lg bg-red-500/10 border border-red-500/20 px-3 py-2 text-sm text-red-400">
+            {error}
+          </div>
+        )}
+
+        {/* 附件预览列表 */}
+        {attachments.length > 0 && (
+          <div className="mb-2 flex flex-wrap gap-2">
+            {attachments.map((att, index) => (
+              <div
+                key={index}
+                className="flex items-center gap-2 rounded-lg border border-white/10 bg-[#1a1a25] px-2 py-1.5 text-sm"
+              >
+                {att.preview ? (
+                  <img
+                    src={`data:${att.attachment.mime_type};base64,${att.preview}`}
+                    alt={att.attachment.file_name}
+                    className="h-8 w-8 rounded object-cover"
+                  />
+                ) : (
+                  <div className="h-8 w-8 rounded bg-zinc-700/50 flex items-center justify-center text-zinc-400">
+                    {getAttachmentIcon(att.attachment.media_type)}
+                  </div>
+                )}
+                <span className="text-zinc-300 max-w-[120px] truncate">
+                  {att.attachment.file_name}
+                </span>
+                <button
+                  onClick={() => handleRemoveAttachment(index)}
+                  className="text-zinc-500 hover:text-red-400 transition-colors"
+                >
+                  <X className="h-4 w-4" />
+                </button>
+              </div>
+            ))}
+          </div>
+        )}
+
+        {/* 输入区域 */}
+        <div
+          className={`flex gap-3 items-center relative ${isDragging ? 'ring-2 ring-[#00f0ff]/50 rounded-xl' : ''}`}
+          onDragEnter={handleDragEnter}
+          onDragLeave={handleDragLeave}
+          onDragOver={handleDragOver}
+          onDrop={handleDrop}
+        >
+          {/* 拖拽提示 */}
+          {isDragging && (
+            <div className="absolute inset-0 rounded-xl bg-[#00f0ff]/10 border-2 border-[#00f0ff]/50 flex items-center justify-center z-10">
+              <div className="text-[#00f0ff] text-sm font-medium">
+                拖放文件到这里
+              </div>
+            </div>
+          )}
+
+          {/* 附件按钮 */}
+          <button
+            onClick={handleAttachClick}
+            disabled={disabled}
+            className="flex h-10 w-10 shrink-0 items-center justify-center rounded-xl border border-white/10 bg-[#1a1a25] text-zinc-400 hover:text-white hover:border-white/20 disabled:opacity-50 transition-all"
+          >
+            <Paperclip className="h-5 w-5" />
+          </button>
+          <input
+            ref={fileInputRef}
+            type="file"
+            multiple
+            className="hidden"
+            onChange={(e) => handleFileSelect(e.target.files)}
+          />
+
+          {/* 输入框 */}
           <div className="flex-1 relative flex items-center">
             <textarea
               ref={textareaRef}
@@ -99,9 +306,11 @@ export function MessageInput({
             />
             <Sparkles className="absolute right-3 top-1/2 -translate-y-1/2 h-4 w-4 text-zinc-600 pointer-events-none" />
           </div>
+
+          {/* 发送按钮 */}
           <button
             onClick={handleSend}
-          disabled={disabled || !content.trim()}
+            disabled={disabled || (!content.trim() && attachments.length === 0)}
             className="flex h-10 w-10 shrink-0 items-center justify-center rounded-xl bg-gradient-to-r from-[#00f0ff] to-[#3b82f6] text-white shadow-lg shadow-[#00f0ff]/20 hover:shadow-xl hover:shadow-[#00f0ff]/30 hover:scale-105 disabled:opacity-50 disabled:hover:scale-100 disabled:cursor-not-allowed transition-all"
           >
             {disabled ? (
@@ -111,8 +320,11 @@ export function MessageInput({
             )}
           </button>
         </div>
+
+        {/* 提示 */}
         <div className="mt-2 text-center text-xs text-zinc-500">
-        按 Enter 发送，Shift+Enter 换行
+          按 Enter 发送，Shift+Enter 换行 · 支持拖拽文件 · 最大 50MB
+        </div>
       </div>
     </div>
   )

web/src/types/protocol.ts

@@ -7,6 +7,7 @@
 export interface WsInboundMessage {
   type: 'message'
   content: string
+  attachments?: Attachment[]
   channel?: string
   chat_id?: string
   sender_id?: string