diff --git a/src/pages/TaskAssistant.tsx b/src/pages/TaskAssistant.tsx
index dd31794..f71f7dd 100644
--- a/src/pages/TaskAssistant.tsx
+++ b/src/pages/TaskAssistant.tsx
@@ -38,7 +38,6 @@ function ChatPage() {
   const loadConversations = useCallback(async () => { try { setConversations(await listConversations()) } catch {} }, [])
   useEffect(() => { loadConversations() }, [loadConversations])
   useEffect(() => { messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' }) }, [messages])
-
   useEffect(() => { if (!activeId && conversations.length > 0) switchConversation(conversations[0].id) }, [conversations])
 
   const switchConversation = useCallback(async (id: string) => {
@@ -54,7 +53,11 @@ function ChatPage() {
 
   const handleDelete = (id: string) => modal.confirm({
     title: '删除对话', okText: '删除', okType: 'danger', cancelText: '取消',
-    onOk: async () => { setDeleting(true); try { await deleteConversation(id); setConversations(prev => prev.filter(c => c.id !== id)); if (activeId === id) { setActiveId(null); setMessages([]) } } catch {}; setDeleting(false) },
+    onOk: async () => {
+      setDeleting(true)
+      try { await deleteConversation(id); setConversations(prev => prev.filter(c => c.id !== id)); if (activeId === id) { setActiveId(null); setMessages([]) } } catch {}
+      setDeleting(false)
+    },
   })
 
   const startEdit = (conv: Conversation) => { setEditingId(conv.id); setEditTitle(conv.title); setTimeout(() => editInputRef.current?.focus(), 50) }
@@ -80,18 +83,43 @@ function ChatPage() {
     try {
       await streamChat(prevMessages.map(m => ({ role: m.role, content: m.content })), activeId, (event: StreamEvent) => {
         switch (event.event) {
-          case 'meta': completedConvId = event.conversationId; if (event.conversationId && event.conversationId !== activeId) { setActiveId(event.conversationId); loadConversations() } break
-          case 'tool.started': currentTools.push({ tool: event.tool, preview: event.preview, done: false }); update({ toolCalls: [...currentTools] }) break
-          case 'tool.completed': { const i = currentTools.findIndex((t: any) => t.tool === event.tool && !t.done); if (i >= 0) { currentTools[i] = { ...currentTools[i], done: true, duration: event.duration, error: event.error }; update({ toolCalls: [...currentTools] }) } } break
-          case 'message.delta': currentContent += event.delta || ''; update({ content: currentContent, streaming: true }) break
-          case 'run.completed': if (event.output) currentContent = event.output; update({ content: currentContent, streaming: false }) break
-          case 'done': completedConvId = event.conversationId || completedConvId; update({ streaming: false }) break
-          case 'error': update({ content: `❌ ${event.error}`, streaming: false }) break
+          case 'meta':
+            completedConvId = event.conversationId
+            if (event.conversationId && event.conversationId !== activeId) { setActiveId(event.conversationId); loadConversations() }
+            break
+          case 'tool.started':
+            currentTools.push({ tool: event.tool, preview: event.preview, done: false })
+            update({ toolCalls: [...currentTools] })
+            break
+          case 'tool.completed': {
+            const i = currentTools.findIndex((t: any) => t.tool === event.tool && !t.done)
+            if (i >= 0) {
+              currentTools[i] = { ...currentTools[i], done: true, duration: event.duration, error: event.error }
+              update({ toolCalls: [...currentTools] })
+            }
+            break
+          }
+          case 'message.delta':
+            currentContent += event.delta || ''
+            update({ content: currentContent, streaming: true })
+            break
+          case 'run.completed':
+            if (event.output) currentContent = event.output
+            update({ content: currentContent, streaming: false })
+            break
+          case 'done':
+            completedConvId = event.conversationId || completedConvId
+            update({ streaming: false })
+            break
+          case 'error':
+            update({ content: 'Error: ' + event.error, streaming: false })
+            break
         }
       }, controller.signal)
       if (completedConvId) loadConversations()
     } catch (err: any) {
-      if (err.name !== 'AbortError') update({ content: `❌ ${err.message}`, streaming: false }); else update({ streaming: false })
+      if (err.name !== 'AbortError') update({ content: 'Error: ' + err.message, streaming: false })
+      else update({ streaming: false })
     } finally { setStreaming(false); abortRef.current = null }
   }
 
@@ -100,8 +128,8 @@ function ChatPage() {
   return (
     <div style={{ display: 'flex', height: 'calc(100vh - 112px)', gap: 0 }}>
       {/* Sidebar */}
-      <div style={{ width: 260, flexShrink: 0, display: 'flex', flexDirection: 'column', background: token.colorBgContainer, borderRight: `1px solid ${token.colorBorderSecondary}` }}>
-        <div style={{ padding: '12px 16px', borderBottom: `1px solid ${token.colorBorderSecondary}` }}>
+      <div style={{ width: 260, flexShrink: 0, display: 'flex', flexDirection: 'column', background: token.colorBgContainer, borderRight: '1px solid ' + token.colorBorderSecondary }}>
+        <div style={{ padding: '12px 16px', borderBottom: '1px solid ' + token.colorBorderSecondary }}>
           <Button type="primary" icon={<PlusOutlined />} block onClick={handleNew}>新对话</Button>
         </div>
         <div style={{ flex: 1, overflowY: 'auto', padding: 8 }}>
@@ -126,7 +154,6 @@ function ChatPage() {
 
       {/* Chat */}
       <div style={{ flex: 1, display: 'flex', flexDirection: 'column', background: token.colorBgLayout }}>
-        {/* Messages */}
         <div style={{ flex: 1, overflowY: 'auto', padding: '24px 32px' }}>
           {messages.length === 0 ? (
             <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center', height: '100%', gap: 12 }}>
@@ -140,7 +167,6 @@ function ChatPage() {
             <div style={{ maxWidth: 800, margin: '0 auto' }}>
               {messages.map(msg => (
                 <div key={msg.id} style={{ marginBottom: 24 }}>
-                  {/* Role label */}
                   <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 8 }}>
                     <div style={{ width: 28, height: 28, borderRadius: 8, display: 'flex', alignItems: 'center', justifyContent: 'center',
                       background: msg.role === 'user' ? token.colorPrimary : token.colorSuccess }}>
@@ -150,30 +176,27 @@ function ChatPage() {
                     {msg.streaming && <Text type="secondary" style={{ fontSize: 11 }}>执行中...</Text>}
                   </div>
 
-                  {/* Tool calls */}
                   {msg.toolCalls && msg.toolCalls.length > 0 && (
                     <div style={{ marginBottom: 8, marginLeft: 36, display: 'flex', flexDirection: 'column', gap: 4 }}>
                       {msg.toolCalls.map((t, i) => (
                         <div key={i} style={{ display: 'inline-flex', alignItems: 'center', gap: 6, padding: '6px 12px', borderRadius: 8,
                           background: t.done ? (t.error ? token.colorErrorBg : token.colorSuccessBg) : token.colorFillSecondary,
-                          border: `1px solid ${t.done ? (t.error ? token.colorErrorBorder : token.colorSuccessBorder) : token.colorBorderSecondary}`,
+                          border: '1px solid ' + (t.done ? (t.error ? token.colorErrorBorder : token.colorSuccessBorder) : token.colorBorderSecondary),
                           fontSize: 12, maxWidth: 'fit-content' }}>
                           <ToolOutlined style={{ color: t.done ? (t.error ? token.colorError : token.colorSuccess) : token.colorTextSecondary }} />
                           <Text style={{ fontSize: 12 }}>{t.preview || t.tool}</Text>
                           {t.done
-                            ? <Text style={{ fontSize: 11, color: t.error ? token.colorError : token.colorSuccess }}>{t.error ? '失败' : `${t.duration?.toFixed(1)}s`}</Text>
+                            ? <Text style={{ fontSize: 11, color: t.error ? token.colorError : token.colorSuccess }}>{t.error ? '失败' : (t.duration ? t.duration.toFixed(1) + 's' : '')}</Text>
                             : <Text type="secondary" style={{ fontSize: 11 }}>执行中</Text>}
                         </div>
                       ))}
                     </div>
                   )}
 
-                  {/* Content */}
                   <div style={{ marginLeft: 36, padding: '12px 16px', borderRadius: 12, lineHeight: 1.85, fontSize: 14,
                     background: msg.role === 'user' ? token.colorPrimary : token.colorBgContainer,
                     color: msg.role === 'user' ? '#fff' : token.colorText,
-                    border: msg.role === 'assistant' ? `1px solid ${token.colorBorderSecondary}` : 'none',
-                    boxShadow: msg.role === 'assistant' ? 'none' : undefined }}>
+                    border: msg.role === 'assistant' ? '1px solid ' + token.colorBorderSecondary : 'none' }}>
                     {msg.role === 'assistant'
                       ? (msg.content ? <Markdown content={msg.content + (msg.streaming ? '▊' : '')} /> : <Text type="secondary">思考中...</Text>)
                       : msg.content}
@@ -185,10 +208,9 @@ function ChatPage() {
           )}
         </div>
 
-        {/* Input */}
-        <div style={{ padding: '16px 32px 20px', background: token.colorBgContainer, borderTop: `1px solid ${token.colorBorderSecondary}` }}>
+        <div style={{ padding: '16px 32px 20px', background: token.colorBgContainer, borderTop: '1px solid ' + token.colorBorderSecondary }}>
           <div style={{ maxWidth: 800, margin: '0 auto' }}>
-            <div style={{ display: 'flex', alignItems: 'flex-end', gap: 10, background: token.colorFillTertiary, borderRadius: 16, padding: '10px 10px 10px 18px', border: `1px solid ${token.colorBorderSecondary}` }}>
+            <div style={{ display: 'flex', alignItems: 'flex-end', gap: 10, background: token.colorFillTertiary, borderRadius: 16, padding: '10px 10px 10px 18px', border: '1px solid ' + token.colorBorderSecondary }}>
               <Input.TextArea value={input} onChange={e => setInput(e.target.value)}
                 onCompositionStart={() => { composingRef.current = true }} onCompositionEnd={() => { composingRef.current = false }}
                 onKeyDown={e => { if (composingRef.current) return; if (e.key === 'Enter' && !e.shiftKey) { e.preventDefault(); handleSend() } }}