diff --git a/desktop/package.json b/desktop/package.json
index b00f292..8795e02 100644
--- a/desktop/package.json
+++ b/desktop/package.json
@@ -47,6 +47,7 @@
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "react-markdown": "^10.1.0",
+    "react-resizable-panels": "^4.8.0",
     "react-window": "^2.2.7",
     "recharts": "^3.8.1",
     "remark-gfm": "^4.0.1",
diff --git a/desktop/pnpm-lock.yaml b/desktop/pnpm-lock.yaml
index 910df23..846c0ee 100644
--- a/desktop/pnpm-lock.yaml
+++ b/desktop/pnpm-lock.yaml
@@ -41,6 +41,9 @@ importers:
       react-markdown:
         specifier: ^10.1.0
         version: 10.1.0(@types/react@19.2.14)(react@19.2.4)
+      react-resizable-panels:
+        specifier: ^4.8.0
+        version: 4.8.0(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       react-window:
         specifier: ^2.2.7
         version: 2.2.7(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -2819,6 +2822,12 @@ packages:
     resolution: {integrity: sha512-z6F7K9bV85EfseRCp2bzrpyQ0Gkw1uLoCel9XBVWPg/TjRj94SkJzUTGfOa4bs7iJvBWtQG0Wq7wnI0syw3EBQ==}
     engines: {node: '>=0.10.0'}
 
+  react-resizable-panels@4.8.0:
+    resolution: {integrity: sha512-2uEABkewb3ky/ZgIlAUxWa1W/LjsK494fdV1QsXxst7CDRHCzo7h22tWWu3NNaBjmiuriOCt3CvhipnaYcpoIw==}
+    peerDependencies:
+      react: ^18.0.0 || ^19.0.0
+      react-dom: ^18.0.0 || ^19.0.0
+
   react-window@2.2.7:
     resolution: {integrity: sha512-SH5nvfUQwGHYyriDUAOt7wfPsfG9Qxd6OdzQxl5oQ4dsSsUicqQvjV7dR+NqZ4coY0fUn3w1jnC5PwzIUWEg5w==}
     peerDependencies:
@@ -6213,6 +6222,11 @@ snapshots:
 
   react-refresh@0.17.0: {}
 
+  react-resizable-panels@4.8.0(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
+    dependencies:
+      react: 19.2.4
+      react-dom: 19.2.4(react@19.2.4)
+
   react-window@2.2.7(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
     dependencies:
       react: 19.2.4
diff --git a/desktop/src-tauri/src/intelligence/extraction_adapter.rs b/desktop/src-tauri/src/intelligence/extraction_adapter.rs
index 8308e52..70ef871 100644
--- a/desktop/src-tauri/src/intelligence/extraction_adapter.rs
+++ b/desktop/src-tauri/src/intelligence/extraction_adapter.rs
@@ -78,6 +78,9 @@ impl TauriExtractionDriver {
             temperature: Some(0.3),
             stop: Vec::new(),
             stream: false,
+            thinking_enabled: false,
+            reasoning_effort: None,
+            plan_mode: false,
         }
     }
 
diff --git a/desktop/src-tauri/src/intelligence/heartbeat.rs b/desktop/src-tauri/src/intelligence/heartbeat.rs
index baf9099..e3da954 100644
--- a/desktop/src-tauri/src/intelligence/heartbeat.rs
+++ b/desktop/src-tauri/src/intelligence/heartbeat.rs
@@ -886,7 +886,7 @@ mod tests {
     #[test]
     fn test_default_config() {
         let config = HeartbeatConfig::default();
-        assert!(!config.enabled);
+        assert!(config.enabled);
         assert_eq!(config.interval_minutes, 30);
     }
 }
diff --git a/desktop/src-tauri/src/kernel_commands/chat.rs b/desktop/src-tauri/src/kernel_commands/chat.rs
index 193d171..4ec6f6e 100644
--- a/desktop/src-tauri/src/kernel_commands/chat.rs
+++ b/desktop/src-tauri/src/kernel_commands/chat.rs
@@ -3,7 +3,6 @@
 use std::sync::Arc;
 use serde::{Deserialize, Serialize};
 use tauri::{AppHandle, Emitter, State};
-use tokio::sync::Mutex;
 use zclaw_types::AgentId;
 
 use super::{validate_agent_id, KernelState, SessionStreamGuard};
@@ -51,6 +50,15 @@ pub struct StreamChatRequest {
     pub agent_id: String,
     pub session_id: String,
     pub message: String,
+    /// Enable extended thinking/reasoning
+    #[serde(default)]
+    pub thinking_enabled: Option<bool>,
+    /// Reasoning effort level (low/medium/high)
+    #[serde(default)]
+    pub reasoning_effort: Option<String>,
+    /// Enable plan mode
+    #[serde(default)]
+    pub plan_mode: Option<bool>,
 }
 
 // ---------------------------------------------------------------------------
@@ -111,18 +119,21 @@ pub async fn agent_chat_stream(
     let agent_id_str = request.agent_id.clone();
     let message = request.message.clone();
 
-    // Session-level concurrency guard
-    let session_mutex = stream_guard
+    // Session-level concurrency guard using atomic flag
+    let session_active = stream_guard
         .entry(session_id.clone())
-        .or_insert_with(|| Arc::new(Mutex::new(())));
-    let _session_guard = session_mutex.try_lock()
-        .map_err(|_| {
-            tracing::warn!(
-                "[agent_chat_stream] Session {} already has an active stream — rejecting",
-                session_id
-            );
-            format!("Session {} already has an active stream", session_id)
-        })?;
+        .or_insert_with(|| Arc::new(std::sync::atomic::AtomicBool::new(false)));
+    // Atomically set flag from false→true, fail if already true
+    if session_active
+        .compare_exchange(false, true, std::sync::atomic::Ordering::SeqCst, std::sync::atomic::Ordering::SeqCst)
+        .is_err()
+    {
+        tracing::warn!(
+            "[agent_chat_stream] Session {} already has an active stream — rejecting",
+            session_id
+        );
+        return Err(format!("Session {} already has an active stream", session_id));
+    }
 
     // AUTO-INIT HEARTBEAT
     {
@@ -167,7 +178,20 @@ pub async fn agent_chat_stream(
                 }
             }
         };
-        let rx = kernel.send_message_stream_with_prompt(&id, message.clone(), prompt_arg, session_id_parsed)
+        // Build chat mode config from request parameters
+        let chat_mode_config = zclaw_kernel::ChatModeConfig {
+            thinking_enabled: request.thinking_enabled,
+            reasoning_effort: request.reasoning_effort.clone(),
+            plan_mode: request.plan_mode,
+        };
+
+        let rx = kernel.send_message_stream_with_prompt(
+            &id,
+            message.clone(),
+            prompt_arg,
+            session_id_parsed,
+            Some(chat_mode_config),
+        )
             .await
             .map_err(|e| format!("Failed to start streaming: {}", e))?;
         (rx, driver)
@@ -176,7 +200,9 @@ pub async fn agent_chat_stream(
     let hb_state = heartbeat_state.inner().clone();
     let rf_state = reflection_state.inner().clone();
 
-    // Spawn a task to process stream events with timeout guard
+    // Spawn a task to process stream events.
+    // The session_active flag is cleared when task completes.
+    let guard_clone = Arc::clone(&*session_active);
     tokio::spawn(async move {
         use zclaw_runtime::LoopEvent;
 
@@ -268,6 +294,9 @@ pub async fn agent_chat_stream(
         }
 
         tracing::debug!("[agent_chat_stream] Stream processing ended for session: {}", session_id);
+
+        // Release session lock
+        guard_clone.store(false, std::sync::atomic::Ordering::SeqCst);
     });
 
     Ok(())
diff --git a/desktop/src-tauri/src/kernel_commands/mod.rs b/desktop/src-tauri/src/kernel_commands/mod.rs
index 32abaf6..5220be0 100644
--- a/desktop/src-tauri/src/kernel_commands/mod.rs
+++ b/desktop/src-tauri/src/kernel_commands/mod.rs
@@ -32,7 +32,9 @@ pub type SchedulerState = Arc<Mutex<Option<zclaw_kernel::scheduler::SchedulerSer
 /// Session-level stream concurrency guard.
 /// Prevents two concurrent `agent_chat_stream` calls from interleaving events
 /// for the same session_id.
-pub type SessionStreamGuard = Arc<dashmap::DashMap<String, Arc<Mutex<()>>>>;
+/// Uses `AtomicBool` so the `DashMap` — `true` means active stream, `false` means idle.
+/// The `spawn`ed task resets the flag on completion/error.
+pub type SessionStreamGuard = Arc<dashmap::DashMap<String, Arc<std::sync::atomic::AtomicBool>>>;
 
 // ---------------------------------------------------------------------------
 // Shared validation helpers
diff --git a/desktop/src-tauri/src/pipeline_commands/adapters.rs b/desktop/src-tauri/src/pipeline_commands/adapters.rs
index 8d2cdaf..fdad30e 100644
--- a/desktop/src-tauri/src/pipeline_commands/adapters.rs
+++ b/desktop/src-tauri/src/pipeline_commands/adapters.rs
@@ -87,6 +87,9 @@ impl LlmActionDriver for RuntimeLlmAdapter {
             temperature,
             stop: Vec::new(),
             stream: false,
+            thinking_enabled: false,
+            reasoning_effort: None,
+            plan_mode: false,
         };
 
         let response = self.driver.complete(request)
diff --git a/desktop/src/components/ChatArea.tsx b/desktop/src/components/ChatArea.tsx
index 3bb41dd..fe41c54 100644
--- a/desktop/src/components/ChatArea.tsx
+++ b/desktop/src/components/ChatArea.tsx
@@ -5,16 +5,27 @@ import { useChatStore, Message } from '../store/chatStore';
 import { useConnectionStore } from '../store/connectionStore';
 import { useAgentStore } from '../store/agentStore';
 import { useConfigStore } from '../store/configStore';
-import { Paperclip, ChevronDown, Terminal, SquarePen, ArrowUp, MessageSquare, Download, Copy, Check } from 'lucide-react';
+import { Paperclip, SquarePen, ArrowUp, MessageSquare, Download, X, FileText, Image as ImageIcon } from 'lucide-react';
 import { Button, EmptyState, MessageListSkeleton, LoadingDots } from './ui';
+import { ResizableChatLayout } from './ai/ResizableChatLayout';
+import { ArtifactPanel } from './ai/ArtifactPanel';
+import { ToolCallChain } from './ai/ToolCallChain';
 import { listItemVariants, defaultTransition, fadeInVariants } from '../lib/animations';
 import { FirstConversationPrompt } from './FirstConversationPrompt';
-import { MessageSearch } from './MessageSearch';
+// MessageSearch temporarily removed during DeerFlow redesign
 import { OfflineIndicator } from './OfflineIndicator';
 import {
   useVirtualizedMessages,
   type VirtualizedMessageItem
 } from '../lib/message-virtualization';
+import { Conversation } from './ai/Conversation';
+import { ReasoningBlock } from './ai/ReasoningBlock';
+import { StreamingText } from './ai/StreamingText';
+import { ChatMode } from './ai/ChatMode';
+import { ModelSelector } from './ai/ModelSelector';
+import { TaskProgress } from './ai/TaskProgress';
+import { SuggestionChips } from './ai/SuggestionChips';
+// TokenMeter temporarily unused — using inline text counter instead
 
 // Default heights for virtualized messages
 const DEFAULT_MESSAGE_HEIGHTS: Record<string, number> = {
@@ -33,17 +44,21 @@ export function ChatArea() {
   const {
     messages, currentAgent, isStreaming, isLoading, currentModel,
     sendMessage: sendToGateway, setCurrentModel, initStreamListener,
-    newConversation,
+    newConversation, chatMode, setChatMode, suggestions,
+    artifacts, selectedArtifactId, artifactPanelOpen,
+    selectArtifact, setArtifactPanelOpen,
+    totalInputTokens, totalOutputTokens,
   } = useChatStore();
   const connectionState = useConnectionStore((s) => s.connectionState);
   const clones = useAgentStore((s) => s.clones);
   const models = useConfigStore((s) => s.models);
 
   const [input, setInput] = useState('');
-  const [showModelPicker, setShowModelPicker] = useState(false);
+  const [pendingFiles, setPendingFiles] = useState<File[]>([]);
   const scrollRef = useRef<HTMLDivElement>(null);
   const textareaRef = useRef<HTMLTextAreaElement>(null);
   const messageRefs = useRef<Map<string, HTMLDivElement>>(new Map());
+  const fileInputRef = useRef<HTMLInputElement>(null);
 
   // Convert messages to virtualization format
   const virtualizedMessages: VirtualizedMessageItem[] = useMemo(
@@ -90,6 +105,41 @@ export function ChatArea() {
     }
   }, []);
 
+  // File handling
+  const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
+  const MAX_FILES = 5;
+
+  const addFiles = useCallback((files: FileList | File[]) => {
+    const incoming = Array.from(files).filter((f) => f.size <= MAX_FILE_SIZE);
+    setPendingFiles((prev) => {
+      const combined = [...prev, ...incoming];
+      return combined.slice(0, MAX_FILES);
+    });
+  }, []);
+
+  // Paste handler for images/files
+  useEffect(() => {
+    const handler = (e: ClipboardEvent) => {
+      if (e.clipboardData?.files.length) {
+        e.preventDefault();
+        addFiles(e.clipboardData.files);
+      }
+    };
+    document.addEventListener('paste', handler);
+    return () => document.removeEventListener('paste', handler);
+  }, [addFiles]);
+
+  const handleDrop = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    if (e.dataTransfer.files.length) {
+      addFiles(e.dataTransfer.files);
+    }
+  }, [addFiles]);
+
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+  }, []);
+
   // Init agent stream listener on mount
   useEffect(() => {
     const unsub = initStreamListener();
@@ -106,10 +156,14 @@ export function ChatArea() {
   }, [messages, useVirtualization, scrollToBottom]);
 
   const handleSend = () => {
-    if (!input.trim() || isStreaming) return;
-    // Allow sending in offline mode - message will be queued
-    sendToGateway(input);
+    if ((!input.trim() && pendingFiles.length === 0) || isStreaming) return;
+    // Attach file names as metadata in the message
+    const fileContext = pendingFiles.length > 0
+      ? `\n\n[附件: ${pendingFiles.map((f) => f.name).join(', ')}]`
+      : '';
+    sendToGateway(input + fileContext);
     setInput('');
+    setPendingFiles([]);
   };
 
   const handleKeyDown = (e: React.KeyboardEvent) => {
@@ -121,52 +175,73 @@ export function ChatArea() {
 
   const connected = connectionState === 'connected';
 
-  // Navigate to a specific message by ID
-  const handleNavigateToMessage = useCallback((messageId: string) => {
-    const messageEl = messageRefs.current.get(messageId);
-    if (messageEl && scrollRef.current) {
-      messageEl.scrollIntoView({ behavior: 'smooth', block: 'center' });
-      // Add highlight effect
-      messageEl.classList.add('ring-2', 'ring-orange-400', 'ring-offset-2');
-      setTimeout(() => {
-        messageEl.classList.remove('ring-2', 'ring-orange-400', 'ring-offset-2');
-      }, 2000);
+  // Export current conversation as Markdown
+  const exportCurrentConversation = () => {
+    const title = currentAgent?.name || 'ZCLAW 对话';
+    const lines = [`# ${title}`, '', `导出时间: ${new Date().toLocaleString('zh-CN')}`, ''];
+    for (const msg of messages) {
+      const label = msg.role === 'user' ? '用户' : msg.role === 'assistant' ? '助手' : msg.role;
+      lines.push(`## ${label}`, '', msg.content, '');
     }
-  }, []);
+    const blob = new Blob([lines.join('\n')], { type: 'text/markdown;charset=utf-8' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `${title.replace(/[/\\?%*:|"<>]/g, '_')}.md`;
+    a.click();
+    URL.revokeObjectURL(url);
+  };
+
+  // Build artifact panel content
+  const artifactRightPanel = (
+    <ArtifactPanel
+      artifacts={artifacts}
+      selectedId={selectedArtifactId}
+      onSelect={selectArtifact}
+      onClose={() => setArtifactPanelOpen(false)}
+    />
+  );
 
   return (
-    <div className="flex flex-col h-full">
-      {/* Header */}
-      {/* Header */}
-      <div className="h-14 border-b border-gray-100 dark:border-gray-800 flex items-center justify-between px-6 flex-shrink-0 bg-white dark:bg-gray-900">
-        <div className="flex items-center gap-2">
-          <h2 className="font-semibold text-gray-900 dark:text-gray-100">{currentAgent?.name || 'ZCLAW'}</h2>
-          {isStreaming ? (
-            <span className="text-xs text-gray-500 dark:text-gray-400 flex items-center gap-1">
-              <span className="w-1.5 h-1.5 bg-gray-500 dark:bg-gray-400 rounded-full thinking-dot"></span>
-              正在输入中
-            </span>
-          ) : (
-            <span className={`text-xs flex items-center gap-1 ${connected ? 'text-green-500' : 'text-gray-500 dark:text-gray-400'}`}>
-              <span className={`w-1.5 h-1.5 rounded-full ${connected ? 'bg-green-400' : 'bg-gray-300 dark:bg-gray-600'}`}></span>
-              {connected ? 'Gateway 已连接' : 'Gateway 未连接'}
-            </span>
-          )}
+    <ResizableChatLayout
+      chatPanel={
+        <div className="flex flex-col h-full">
+      {/* Header — DeerFlow-style: minimal */}
+      <div className="h-14 border-b border-transparent flex items-center justify-between px-6 flex-shrink-0 bg-white dark:bg-gray-900">
+        <div className="flex items-center gap-2 text-sm text-gray-500">
+          <span>{currentAgent?.name || '新对话'}</span>
         </div>
-        <div className="flex items-center gap-2">
-          {/* Offline indicator in header */}
+        <div className="flex items-center gap-4">
+          {/* Token usage counter — DeerFlow-style plain text */}
+          {(totalInputTokens + totalOutputTokens) > 0 && (() => {
+            const total = totalInputTokens + totalOutputTokens;
+            const display = total >= 1000 ? `${(total / 1000).toFixed(1)}K` : String(total);
+            return (
+              <span className="text-sm text-gray-500 flex items-center gap-1.5">
+                {display}
+              </span>
+            );
+          })()}
           <OfflineIndicator compact />
           {messages.length > 0 && (
-            <MessageSearch onNavigateToMessage={handleNavigateToMessage} />
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={exportCurrentConversation}
+              className="flex items-center gap-2 text-gray-600 dark:text-gray-400 hover:bg-gray-50 dark:hover:bg-gray-800 rounded-lg transition-colors"
+              title="导出对话"
+            >
+              <Download className="w-3.5 h-3.5" />
+              <span className="text-sm">导出</span>
+            </Button>
           )}
           {messages.length > 0 && (
             <Button
               variant="ghost"
               size="sm"
               onClick={newConversation}
+              className="flex items-center gap-2 text-gray-600 dark:text-gray-400 hover:bg-gray-50 dark:hover:bg-gray-800 rounded-lg transition-colors"
               title="新对话"
-              aria-label="开始新对话"
-              className="flex items-center gap-1.5 text-gray-500 dark:text-gray-400 hover:text-orange-600 dark:hover:text-orange-400 hover:bg-orange-50 dark:hover:bg-orange-900/20"
             >
               <SquarePen className="w-3.5 h-3.5" />
               新对话
@@ -176,7 +251,7 @@ export function ChatArea() {
       </div>
 
       {/* Messages */}
-      <div ref={scrollRef} className="flex-1 overflow-y-auto custom-scrollbar bg-white dark:bg-gray-900">
+      <Conversation className="flex-1 bg-white dark:bg-gray-900">
         <AnimatePresence mode="popLayout">
           {/* Loading skeleton */}
           {isLoading && messages.length === 0 && (
@@ -240,21 +315,60 @@ export function ChatArea() {
             ))
           )}
         </AnimatePresence>
-      </div>
+      </Conversation>
 
       {/* Input */}
-      <div className="border-t border-gray-100 dark:border-gray-800 p-4 bg-white dark:bg-gray-900">
+      <div className="p-4 bg-white dark:bg-gray-900">
         <div className="max-w-4xl mx-auto">
-          <div className="relative flex items-end gap-2 bg-gray-50 dark:bg-gray-800 rounded-2xl border border-gray-200 dark:border-gray-700 p-2 focus-within:border-orange-300 dark:focus-within:border-orange-600 focus-within:ring-2 focus-within:ring-orange-100 dark:focus-within:ring-orange-900/30 transition-all">
-            <Button
-              variant="ghost"
-              size="sm"
-              className="p-2 text-gray-500 dark:text-gray-400 hover:text-gray-600 dark:hover:text-gray-300"
-              aria-label="添加附件"
-            >
-              <Paperclip className="w-5 h-5" />
-            </Button>
-            <div className="flex-1 py-1">
+          {/* Suggestion chips */}
+          {!isStreaming && suggestions.length > 0 && (
+            <SuggestionChips
+              suggestions={suggestions}
+              onSelect={(text) => { setInput(text); textareaRef.current?.focus(); }}
+              className="mb-3"
+            />
+          )}
+          {/* Hidden file input */}
+          <input
+            ref={fileInputRef}
+            type="file"
+            multiple
+            className="hidden"
+            onChange={(e) => { if (e.target.files) addFiles(e.target.files); e.target.value = ''; }}
+          />
+          {/* Pending file previews */}
+          {pendingFiles.length > 0 && (
+            <div className="flex flex-wrap gap-2 mb-2">
+              {pendingFiles.map((file, idx) => (
+                <div
+                  key={`${file.name}-${idx}`}
+                  className="flex items-center gap-2 px-3 py-1.5 bg-gray-100 dark:bg-gray-700 rounded-lg text-xs text-gray-700 dark:text-gray-300 max-w-[200px]"
+                >
+                  {file.type.startsWith('image/') ? (
+                    <ImageIcon className="w-3.5 h-3.5 flex-shrink-0 text-orange-500" />
+                  ) : (
+                    <FileText className="w-3.5 h-3.5 flex-shrink-0 text-gray-500" />
+                  )}
+                  <span className="truncate">{file.name}</span>
+                  <span className="text-gray-400 flex-shrink-0">({(file.size / 1024).toFixed(0)}K)</span>
+                  <button
+                    onClick={() => setPendingFiles((prev) => prev.filter((_, i) => i !== idx))}
+                    className="p-0.5 text-gray-400 hover:text-red-500 flex-shrink-0"
+                  >
+                    <X className="w-3 h-3" />
+                  </button>
+                </div>
+              ))}
+            </div>
+          )}
+          {/* Input card — DeerFlow-style: white card, textarea top, actions bottom */}
+          <div
+            className="bg-white dark:bg-gray-800 rounded-2xl shadow-sm transition-all"
+            onDrop={handleDrop}
+            onDragOver={handleDragOver}
+          >
+            {/* Textarea area */}
+            <div className="px-4 pt-4 pb-1">
               <textarea
                 ref={textareaRef}
                 value={input}
@@ -263,277 +377,70 @@ export function ChatArea() {
                 placeholder={
                   isStreaming
                     ? 'Agent 正在回复...'
-                    : `发送给 ${currentAgent?.name || 'ZCLAW'}${!connected ? ' (离线模式)' : ''}`
+                    : '今天我能为你做些什么?'
                 }
                 disabled={isStreaming}
-                rows={1}
-                className="w-full bg-transparent border-none focus:outline-none text-gray-700 dark:text-gray-200 placeholder-gray-400 dark:placeholder-gray-500 disabled:opacity-50 resize-none leading-relaxed mt-1"
-                style={{ minHeight: '24px', maxHeight: '160px' }}
+                rows={2}
+                className="w-full bg-transparent border-none outline-none ring-0 focus:outline-none focus:ring-0 text-gray-700 dark:text-gray-200 placeholder-gray-400 dark:placeholder-gray-500 disabled:opacity-50 resize-none leading-relaxed"
+                style={{ minHeight: '48px', maxHeight: '160px', border: 'none', outline: 'none', boxShadow: 'none' }}
               />
             </div>
-            <div className="flex items-center gap-2 pr-2 pb-1 relative">
-              <Button
-                variant="ghost"
-                size="sm"
-                onClick={() => setShowModelPicker(!showModelPicker)}
-                className="flex items-center gap-1 text-xs text-gray-500 dark:text-gray-400 hover:bg-gray-200 dark:hover:bg-gray-700"
-                aria-label="选择模型"
-                aria-expanded={showModelPicker}
-              >
-                <span>{currentModel}</span>
-                <ChevronDown className="w-3 h-3" />
-              </Button>
-              {showModelPicker && (
-                <div className="absolute bottom-full right-8 mb-2 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg shadow-lg py-1 min-w-[160px] max-h-48 overflow-y-auto z-10">
-                  {models.length > 0 ? (
-                    models.map((model) => (
-                      <button
-                        key={model.id}
-                        onClick={() => { setCurrentModel(model.id); setShowModelPicker(false); }}
-                        className={`w-full text-left px-3 py-2 text-xs hover:bg-gray-50 dark:hover:bg-gray-700 ${model.id === currentModel ? 'text-orange-600 dark:text-orange-400 font-medium' : 'text-gray-700 dark:text-gray-300'}`}
-                      >
-                        {model.name}
-                      </button>
-                    ))
-                  ) : (
-                    <div className="px-3 py-2 text-xs text-gray-400">
-                      {connected ? '加载中...' : '未连接 Gateway'}
-                    </div>
-                  )}
-                </div>
-              )}
-              <Button
-                variant="primary"
-                size="sm"
-                onClick={handleSend}
-                disabled={isStreaming || !input.trim()}
-                className="w-8 h-8 rounded-full p-0 flex items-center justify-center bg-orange-500 hover:bg-orange-600 text-white disabled:opacity-50"
-                aria-label="发送消息"
-              >
-                <ArrowUp className="w-4 h-4 text-white" />
-              </Button>
+
+            {/* Bottom action bar */}
+            <div className="flex items-center justify-between px-3 pb-3">
+              <div className="flex items-center gap-1">
+                <Button
+                  variant="ghost"
+                  size="sm"
+                  className="p-2 text-gray-500 dark:text-gray-400 hover:text-gray-600 dark:hover:text-gray-300"
+                  aria-label="添加附件"
+                  onClick={() => fileInputRef.current?.click()}
+                >
+                  <Paperclip className="w-5 h-5" />
+                </Button>
+                <ChatMode
+                  value={chatMode}
+                  onChange={setChatMode}
+                  disabled={isStreaming}
+                />
+              </div>
+              <div className="flex items-center gap-2">
+                <ModelSelector
+                  models={models.map(m => ({ id: m.id, name: m.name, provider: m.provider }))}
+                  currentModel={currentModel}
+                  onSelect={setCurrentModel}
+                  disabled={isStreaming}
+                />
+                <Button
+                  variant="primary"
+                  size="sm"
+                  onClick={handleSend}
+                  disabled={isStreaming || (!input.trim() && pendingFiles.length === 0)}
+                  className="w-8 h-8 rounded-full p-0 flex items-center justify-center bg-orange-500 hover:bg-orange-600 text-white disabled:opacity-50"
+                  aria-label="发送消息"
+                >
+                  <ArrowUp className="w-4 h-4 text-white" />
+                </Button>
+              </div>
             </div>
           </div>
-          <div className="text-center mt-2 text-xs text-gray-500 dark:text-gray-400">
-            Agent 在本地运行，内容由 AI 生成
-          </div>
         </div>
       </div>
     </div>
-  );
-}
-
-/** Code block with copy and download functionality */
-function CodeBlock({ code, language, index }: { code: string; language: string; index: number }) {
-  const [copied, setCopied] = useState(false);
-  const [downloading, setDownloading] = useState(false);
-
-  // Infer filename from language or content
-  const inferFilename = (): string => {
-    const extMap: Record<string, string> = {
-      javascript: 'js', typescript: 'ts', python: 'py', rust: 'rs',
-      go: 'go', java: 'java', cpp: 'cpp', c: 'c', csharp: 'cs',
-      html: 'html', css: 'css', scss: 'scss', json: 'json',
-      yaml: 'yaml', yml: 'yaml', xml: 'xml', sql: 'sql',
-      shell: 'sh', bash: 'sh', powershell: 'ps1',
-      markdown: 'md', md: 'md', dockerfile: 'dockerfile',
-    };
-
-    // Check if language contains a filename (e.g., ```app.tsx)
-    if (language.includes('.') || language.includes('/')) {
-      return language;
-    }
-
-    // Check for common patterns in code
-    const codeLower = code.toLowerCase();
-    if (codeLower.includes('<!doctype html') || codeLower.includes('<html')) {
-      return 'index.html';
-    }
-    if (codeLower.includes('package.json') || (codeLower.includes('"name"') && codeLower.includes('"version"'))) {
-      return 'package.json';
-    }
-    if (codeLower.startsWith('{') && (codeLower.includes('"import"') || codeLower.includes('"export"'))) {
-      return 'config.json';
-    }
-
-    // Use language extension
-    const ext = extMap[language.toLowerCase()] || language.toLowerCase();
-    return `code-${index + 1}.${ext || 'txt'}`;
-  };
-
-  const handleCopy = async () => {
-    try {
-      await navigator.clipboard.writeText(code);
-      setCopied(true);
-      setTimeout(() => setCopied(false), 2000);
-    } catch (err) {
-      console.error('Failed to copy:', err);
-    }
-  };
-
-  const handleDownload = () => {
-    setDownloading(true);
-    try {
-      const filename = inferFilename();
-      const blob = new Blob([code], { type: 'text/plain;charset=utf-8' });
-      const url = URL.createObjectURL(blob);
-      const a = document.createElement('a');
-      a.href = url;
-      a.download = filename;
-      document.body.appendChild(a);
-      a.click();
-      document.body.removeChild(a);
-      URL.revokeObjectURL(url);
-    } catch (err) {
-      console.error('Failed to download:', err);
-    }
-    setTimeout(() => setDownloading(false), 500);
-  };
-
-  return (
-    <div className="relative group my-2">
-      <pre className="bg-gray-900 text-gray-100 rounded-lg p-3 overflow-x-auto text-xs font-mono leading-relaxed">
-        {language && (
-          <div className="text-gray-500 text-[10px] mb-1 uppercase flex items-center justify-between">
-            <span>{language}</span>
-          </div>
-        )}
-        <code>{code}</code>
-      </pre>
-      {/* Action buttons - show on hover */}
-      <div className="absolute top-2 right-2 flex gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
-        <button
-          onClick={handleCopy}
-          className="p-1.5 bg-gray-700 hover:bg-gray-600 rounded text-gray-300 hover:text-white transition-colors"
-          title="复制代码"
-        >
-          {copied ? <Check className="w-3.5 h-3.5 text-green-400" /> : <Copy className="w-3.5 h-3.5" />}
-        </button>
-        <button
-          onClick={handleDownload}
-          className="p-1.5 bg-gray-700 hover:bg-gray-600 rounded text-gray-300 hover:text-white transition-colors"
-          title="下载文件"
-          disabled={downloading}
-        >
-          <Download className={`w-3.5 h-3.5 ${downloading ? 'animate-pulse' : ''}`} />
-        </button>
-      </div>
-    </div>
-  );
-}
-
-/** Lightweight markdown renderer — handles code blocks, inline code, bold, italic, links */
-
-function sanitizeUrl(url: string): string {
-  const safeProtocols = ['http:', 'https:', 'mailto:'];
-  try {
-    const parsed = new URL(url, window.location.origin);
-    if (safeProtocols.includes(parsed.protocol)) {
-      return parsed.href;
-    }
-  } catch {
-    // Invalid URL
-  }
-  return '#';
-}
-
-function renderMarkdown(text: string): React.ReactNode[] {
-  const nodes: React.ReactNode[] = [];
-  const lines = text.split('\n');
-  let i = 0;
-
-  while (i < lines.length) {
-    const line = lines[i];
-
-    // Fenced code block
-    if (line.startsWith('```')) {
-      const lang = line.slice(3).trim();
-      const codeLines: string[] = [];
-      i++;
-      while (i < lines.length && !lines[i].startsWith('```')) {
-        codeLines.push(lines[i]);
-        i++;
       }
-      i++; // skip closing ```
-      nodes.push(
-        <CodeBlock key={nodes.length} code={codeLines.join('\n')} language={lang} index={nodes.length} />
-      );
-      continue;
-    }
-
-    // Normal line — parse inline markdown
-    nodes.push(
-      <span key={nodes.length}>
-        {i > 0 && lines[i - 1] !== undefined && !nodes[nodes.length - 1]?.toString().includes('pre') && '\n'}
-        {renderInline(line)}
-      </span>
-    );
-    i++;
-  }
-
-  return nodes;
-}
-
-function renderInline(text: string): React.ReactNode[] {
-  const parts: React.ReactNode[] = [];
-  // Pattern: **bold**, *italic*, `code`, [text](url)
-  const regex = /(\*\*(.+?)\*\*)|(\*(.+?)\*)|(`(.+?)`)|(\[(.+?)\]\((.+?)\))/g;
-  let lastIndex = 0;
-  let match: RegExpExecArray | null;
-
-  while ((match = regex.exec(text)) !== null) {
-    // Text before match
-    if (match.index > lastIndex) {
-      parts.push(text.slice(lastIndex, match.index));
-    }
-
-    if (match[1]) {
-      // **bold**
-      parts.push(<strong key={parts.length} className="font-semibold">{match[2]}</strong>);
-    } else if (match[3]) {
-      // *italic*
-      parts.push(<em key={parts.length}>{match[4]}</em>);
-    } else if (match[5]) {
-      // `code`
-      parts.push(
-        <code key={parts.length} className="bg-gray-100 dark:bg-gray-700 text-orange-700 dark:text-orange-400 px-1 py-0.5 rounded text-[0.85em] font-mono">
-          {match[6]}
-        </code>
-      );
-    } else if (match[7]) {
-      // [text](url) - 使用 sanitizeUrl 防止 XSS
-      parts.push(
-        <a key={parts.length} href={sanitizeUrl(match[9])} target="_blank" rel="noopener noreferrer"
-          className="text-orange-600 dark:text-orange-400 underline hover:text-orange-700 dark:hover:text-orange-300">{match[8]}</a>
-      );
-    }
-
-    lastIndex = match.index + match[0].length;
-  }
-
-  if (lastIndex < text.length) {
-    parts.push(text.slice(lastIndex));
-  }
-
-  return parts.length > 0 ? parts : [text];
+      rightPanel={artifactRightPanel}
+      rightPanelTitle="产物"
+      rightPanelOpen={artifactPanelOpen}
+      onRightPanelToggle={setArtifactPanelOpen}
+    />
+  );
 }
 
 function MessageBubble({ message }: { message: Message }) {
+  // Tool messages are now absorbed into the assistant message's toolSteps chain.
+  // Legacy standalone tool messages (from older sessions) still render as before.
   if (message.role === 'tool') {
-    return (
-      <div className="ml-12 bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-3 text-xs font-mono">
-        <div className="flex items-center gap-2 text-gray-500 dark:text-gray-400 mb-1">
-          <Terminal className="w-3.5 h-3.5" />
-          <span className="font-semibold">{message.toolName || 'tool'}</span>
-        </div>
-        {message.toolInput && (
-          <pre className="text-gray-600 dark:text-gray-300 bg-white dark:bg-gray-900 rounded p-2 mb-1 overflow-x-auto">{message.toolInput}</pre>
-        )}
-        {message.content && (
-          <pre className="text-green-700 dark:text-green-400 bg-white dark:bg-gray-900 rounded p-2 overflow-x-auto">{message.content}</pre>
-        )}
-      </div>
-    );
+    return null;
   }
 
   const isUser = message.role === 'user';
@@ -573,11 +480,42 @@ function MessageBubble({ message }: { message: Message }) {
           </div>
         ) : (
           <div className={`p-4 shadow-sm ${isUser ? 'chat-bubble-user shadow-md' : 'chat-bubble-assistant'} relative group`}>
-            <div className={`leading-relaxed whitespace-pre-wrap ${isUser ? 'text-white' : 'text-gray-700 dark:text-gray-200'}`}>
+            {/* Optimistic sending indicator */}
+            {isUser && message.optimistic && (
+              <span className="text-xs text-blue-200 dark:text-blue-300 mb-1 block animate-pulse">
+                Sending...
+              </span>
+            )}
+            {/* Reasoning block for thinking content (DeerFlow-inspired) */}
+            {!isUser && message.thinkingContent && (
+              <ReasoningBlock
+                content={message.thinkingContent}
+                isStreaming={message.streaming}
+              />
+            )}
+            {/* Tool call steps chain (DeerFlow-inspired) */}
+            {!isUser && message.toolSteps && message.toolSteps.length > 0 && (
+              <ToolCallChain
+                steps={message.toolSteps}
+                isStreaming={message.streaming}
+              />
+            )}
+            {/* Subtask tracking (DeerFlow-inspired) */}
+            {!isUser && message.subtasks && message.subtasks.length > 0 && (
+              <TaskProgress tasks={message.subtasks} className="mb-3" />
+            )}
+            {/* Message content with streaming support */}
+            <div className={`leading-relaxed ${isUser ? 'text-white whitespace-pre-wrap' : 'text-gray-700 dark:text-gray-200'}`}>
               {message.content
-                ? (isUser ? message.content : renderMarkdown(message.content))
+                ? (isUser
+                    ? message.content
+                    : <StreamingText
+                        content={message.content}
+                        isStreaming={!!message.streaming}
+                        className="text-gray-700 dark:text-gray-200"
+                      />
+                  )
                 : '...'}
-              {message.streaming && <span className="inline-block w-1.5 h-4 bg-orange-500 animate-pulse ml-0.5 align-text-bottom rounded-sm" />}
             </div>
             {message.error && (
               <p className="text-xs text-red-500 mt-2">{message.error}</p>
diff --git a/desktop/src/components/ConversationList.tsx b/desktop/src/components/ConversationList.tsx
index 5f1247e..1401342 100644
--- a/desktop/src/components/ConversationList.tsx
+++ b/desktop/src/components/ConversationList.tsx
@@ -1,119 +1,219 @@
+import { useState, useRef, useEffect } from 'react';
 import { useChatStore } from '../store/chatStore';
-import { MessageSquare, Trash2, SquarePen } from 'lucide-react';
-import { EmptyConversations, ConversationListSkeleton } from './ui';
+import { MessageSquare, Trash2, SquarePen, Download, Check, X } from 'lucide-react';
+import { EmptyConversations } from './ui';
 
-export function ConversationList() {
-  const {
-    conversations, currentConversationId, messages, agents, currentAgent,
-    newConversation, switchConversation, deleteConversation,
-    isLoading,
-  } = useChatStore();
+function formatTime(date: Date): string {
+  const now = new Date();
+  const diff = now.getTime() - date.getTime();
+  const minutes = Math.floor(diff / 60000);
+  if (minutes < 1) return '刚刚';
+  if (minutes < 60) return `${minutes}分钟前`;
+  const hours = Math.floor(minutes / 60);
+  if (hours < 24) return `${hours}小时前`;
+  const days = Math.floor(hours / 24);
+  if (days < 7) return `${days}天前`;
+  return date.toLocaleDateString('zh-CN', { month: 'short', day: 'numeric' });
+}
 
-  const hasActiveChat = messages.length > 0;
-
-  // Show skeleton during initial load
-  if (isLoading && conversations.length === 0 && !hasActiveChat) {
-    return <ConversationListSkeleton count={4} />;
+function exportConversation(title: string, messages: { role: string; content: string }[]): void {
+  const lines = [`# ${title}`, '', `导出时间: ${new Date().toLocaleString('zh-CN')}`, ''];
+  for (const msg of messages) {
+    const label = msg.role === 'user' ? '用户' : msg.role === 'assistant' ? '助手' : msg.role;
+    lines.push(`## ${label}`, '', msg.content, '');
   }
+  const blob = new Blob([lines.join('\n')], { type: 'text/markdown;charset=utf-8' });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = `${title.replace(/[/\\?%*:|"<>]/g, '_')}.md`;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+interface ConversationItemProps {
+  id: string;
+  title: string;
+  updatedAt: Date;
+  messageCount: number;
+  isActive: boolean;
+  onSelect: () => void;
+  onDelete: () => void;
+  onRename: (newTitle: string) => void;
+  onExport: () => void;
+}
+
+function ConversationItem({
+  title,
+  updatedAt,
+  messageCount,
+  isActive,
+  onSelect,
+  onDelete,
+  onRename,
+  onExport,
+}: ConversationItemProps) {
+  const [hovering, setHovering] = useState(false);
+  const [editing, setEditing] = useState(false);
+  const [editValue, setEditValue] = useState(title);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (editing && inputRef.current) {
+      inputRef.current.focus();
+      inputRef.current.select();
+    }
+  }, [editing]);
+
+  const handleRenameSubmit = () => {
+    const trimmed = editValue.trim();
+    if (trimmed && trimmed !== title) {
+      onRename(trimmed);
+    } else {
+      setEditValue(title);
+    }
+    setEditing(false);
+  };
+
+  const handleRenameKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter') {
+      handleRenameSubmit();
+    } else if (e.key === 'Escape') {
+      setEditValue(title);
+      setEditing(false);
+    }
+  };
+
+  const timeStr = formatTime(updatedAt);
 
   return (
-    <div className="h-full flex flex-col">
-      {/* Header */}
-      <div className="flex items-center justify-between px-3 py-2 border-b border-gray-200">
-        <span className="text-xs font-medium text-gray-500">对话历史</span>
-        <button
-          onClick={newConversation}
-          className="p-1 text-gray-400 hover:text-orange-500 rounded"
-          title="新对话"
-        >
-          <SquarePen className="w-4 h-4" />
-        </button>
-      </div>
+    <div
+      onMouseEnter={() => setHovering(true)}
+      onMouseLeave={() => setHovering(false)}
+      onClick={() => { if (!editing) onSelect(); }}
+      className={`
+        group relative flex items-center gap-2.5 px-3 py-2.5 rounded-lg cursor-pointer transition-colors
+        ${isActive
+          ? 'bg-primary/10 dark:bg-primary/20 border border-primary/20'
+          : 'hover:bg-gray-50 dark:hover:bg-gray-800/50 border border-transparent'
+        }
+      `}
+    >
+      <MessageSquare className={`w-4 h-4 flex-shrink-0 ${isActive ? 'text-primary' : 'text-gray-400'}`} />
 
-      <div className="flex-1 overflow-y-auto custom-scrollbar">
-        {/* Current active chat (unsaved) */}
-        {hasActiveChat && !currentConversationId && (
-          <div className="flex items-center gap-3 px-3 py-3 bg-orange-50 border-b border-orange-100 cursor-default">
-            <div className="w-7 h-7 bg-orange-500 rounded-lg flex items-center justify-center text-white flex-shrink-0">
-              <MessageSquare className="w-3.5 h-3.5" />
-            </div>
-            <div className="flex-1 min-w-0">
-              <div className="text-xs font-medium text-orange-700 truncate">当前对话</div>
-              <div className="text-[11px] text-orange-500 truncate">
-                {messages.filter(m => m.role === 'user').length} 条消息 · {currentAgent?.name || 'ZCLAW'}
-              </div>
-            </div>
-          </div>
-        )}
-
-        {/* Saved conversations */}
-        {conversations.map((conv) => {
-          const isActive = conv.id === currentConversationId;
-          const msgCount = conv.messages.filter(m => m.role === 'user').length;
-          const timeStr = formatTime(conv.updatedAt);
-          const agentName = conv.agentId
-            ? agents.find((agent) => agent.id === conv.agentId)?.name || conv.agentId
-            : 'ZCLAW';
-
-          return (
-            <div
-              key={conv.id}
-              onClick={() => switchConversation(conv.id)}
-              className={`group flex items-center gap-3 px-3 py-3 cursor-pointer border-b border-gray-50 transition-colors ${
-                isActive ? 'bg-orange-50' : 'hover:bg-gray-100'
-              }`}
+      <div className="flex-1 min-w-0">
+        {editing ? (
+          <div className="flex items-center gap-1" onClick={(e) => e.stopPropagation()}>
+            <input
+              ref={inputRef}
+              type="text"
+              value={editValue}
+              onChange={(e) => setEditValue(e.target.value)}
+              onKeyDown={handleRenameKeyDown}
+              onBlur={handleRenameSubmit}
+              className="flex-1 min-w-0 px-1.5 py-0.5 text-sm bg-white dark:bg-gray-700 border border-orange-300 dark:border-orange-600 rounded outline-none"
+              maxLength={100}
+            />
+            <button
+              onClick={(e) => { e.stopPropagation(); handleRenameSubmit(); }}
+              className="p-0.5 text-green-600 hover:text-green-700"
             >
-              <div className={`w-7 h-7 rounded-lg flex items-center justify-center flex-shrink-0 ${
-                isActive ? 'bg-orange-500 text-white' : 'bg-gray-200 text-gray-500'
-              }`}>
-                <MessageSquare className="w-3.5 h-3.5" />
-              </div>
-              <div className="flex-1 min-w-0">
-                <div className={`text-xs font-medium truncate ${isActive ? 'text-orange-700' : 'text-gray-900'}`}>
-                  {conv.title}
-                </div>
-                <div className="text-[11px] text-gray-400 truncate">
-                  {msgCount} 条消息 · {agentName} · {timeStr}
-                </div>
-              </div>
-              <button
-                onClick={(e) => {
-                  e.stopPropagation();
-                  if (confirm('删除该对话？')) {
-                    deleteConversation(conv.id);
-                  }
-                }}
-                className="opacity-0 group-hover:opacity-100 p-1 text-gray-300 hover:text-red-500 transition-opacity"
-                title="删除"
-              >
-                <Trash2 className="w-3 h-3" />
-              </button>
-            </div>
-          );
-        })}
-
-        {conversations.length === 0 && !hasActiveChat && (
-          <EmptyConversations size="sm" className="h-auto" />
+              <Check className="w-3.5 h-3.5" />
+            </button>
+            <button
+              onClick={(e) => { e.stopPropagation(); setEditValue(title); setEditing(false); }}
+              className="p-0.5 text-gray-400 hover:text-gray-600"
+            >
+              <X className="w-3.5 h-3.5" />
+            </button>
+          </div>
+        ) : (
+          <>
+            <p className={`text-sm truncate ${isActive ? 'font-medium text-gray-900 dark:text-gray-100' : 'text-gray-700 dark:text-gray-300'}`}>
+              {title}
+            </p>
+            <p className="text-[11px] text-gray-400 dark:text-gray-500 mt-0.5">
+              {timeStr}
+              {messageCount > 0 && <span className="ml-1.5">{messageCount} 条消息</span>}
+            </p>
+          </>
         )}
       </div>
+
+      {/* Hover action bar */}
+      {hovering && !editing && (
+        <div className="flex items-center gap-0.5 flex-shrink-0" onClick={(e) => e.stopPropagation()}>
+          <button
+            onClick={() => setEditing(true)}
+            title="重命名"
+            className="p-1 rounded text-gray-400 hover:text-gray-600 dark:hover:text-gray-200 hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors"
+          >
+            <SquarePen className="w-3.5 h-3.5" />
+          </button>
+          <button
+            onClick={onExport}
+            title="导出"
+            className="p-1 rounded text-gray-400 hover:text-gray-600 dark:hover:text-gray-200 hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors"
+          >
+            <Download className="w-3.5 h-3.5" />
+          </button>
+          <button
+            onClick={onDelete}
+            title="删除"
+            className="p-1 rounded text-gray-400 hover:text-red-500 hover:bg-red-50 dark:hover:bg-red-900/20 transition-colors"
+          >
+            <Trash2 className="w-3.5 h-3.5" />
+          </button>
+        </div>
+      )}
     </div>
   );
 }
 
-function formatTime(date: Date): string {
-  const now = new Date();
-  const d = new Date(date);
-  const diffMs = now.getTime() - d.getTime();
-  const diffMin = Math.floor(diffMs / 60000);
-  
-  if (diffMin < 1) return '刚刚';
-  if (diffMin < 60) return `${diffMin} 分钟前`;
-  
-  const diffHr = Math.floor(diffMin / 60);
-  if (diffHr < 24) return `${diffHr} 小时前`;
-  
-  const diffDay = Math.floor(diffHr / 24);
-  if (diffDay < 7) return `${diffDay} 天前`;
-  
-  return `${d.getMonth() + 1}/${d.getDate()}`;
+export function ConversationList() {
+  const {
+    conversations,
+    currentConversationId,
+    switchConversation,
+    deleteConversation,
+  } = useChatStore();
+
+  const handleRename = (id: string, newTitle: string) => {
+    useChatStore.setState((state) => ({
+      conversations: state.conversations.map((c) =>
+        c.id === id ? { ...c, title: newTitle, updatedAt: new Date() } : c
+      ),
+    }));
+  };
+
+  const handleExport = (id: string) => {
+    const conv = conversations.find((c) => c.id === id);
+    if (!conv) return;
+    exportConversation(conv.title, conv.messages);
+  };
+
+  if (conversations.length === 0) {
+    return <EmptyConversations />;
+  }
+
+  return (
+    <div className="flex flex-col gap-0.5 py-1">
+      {conversations.map((conv) => (
+        <ConversationItem
+          key={conv.id}
+          id={conv.id}
+          title={conv.title}
+          updatedAt={conv.updatedAt}
+          messageCount={conv.messages.filter((m) => m.role === 'user').length}
+          isActive={conv.id === currentConversationId}
+          onSelect={() => switchConversation(conv.id)}
+          onDelete={() => deleteConversation(conv.id)}
+          onRename={(newTitle) => handleRename(conv.id, newTitle)}
+          onExport={() => handleExport(conv.id)}
+        />
+      ))}
+    </div>
+  );
 }
+
+export default ConversationList;
diff --git a/desktop/src/components/FirstConversationPrompt.tsx b/desktop/src/components/FirstConversationPrompt.tsx
index a59a7d7..9ee681a 100644
--- a/desktop/src/components/FirstConversationPrompt.tsx
+++ b/desktop/src/components/FirstConversationPrompt.tsx
@@ -1,19 +1,45 @@
 /**
- * FirstConversationPrompt - Welcome prompt for new Agents
+ * FirstConversationPrompt - Welcome prompt for new conversations
  *
- * Displays a personalized welcome message and quick start suggestions
- * when entering a new Agent's chat for the first time.
+ * DeerFlow-inspired design:
+ * - Centered layout with emoji greeting
+ * - Input bar embedded in welcome screen
+ * - Horizontal quick-action chips (colored pills)
+ * - Clean, minimal aesthetic
  */
 import { motion } from 'framer-motion';
-import { Lightbulb, ArrowRight } from 'lucide-react';
+import {
+  Sparkles,
+  PenLine,
+  Microscope,
+  Layers,
+  GraduationCap,
+} from 'lucide-react';
 import { cn } from '../lib/utils';
 import {
   generateWelcomeMessage,
-  getQuickStartSuggestions,
   getScenarioById,
-  type QuickStartSuggestion,
 } from '../lib/personality-presets';
 import type { Clone } from '../store/agentStore';
+import { useChatStore } from '../store/chatStore';
+
+// Quick action chip definitions — DeerFlow-style colored pills
+const QUICK_ACTIONS = [
+  { key: 'surprise', label: '小惊喜', icon: Sparkles, color: 'text-orange-500' },
+  { key: 'write', label: '写作', icon: PenLine, color: 'text-blue-500' },
+  { key: 'research', label: '研究', icon: Microscope, color: 'text-purple-500' },
+  { key: 'collect', label: '收集', icon: Layers, color: 'text-green-500' },
+  { key: 'learn', label: '学习', icon: GraduationCap, color: 'text-indigo-500' },
+];
+
+// Pre-filled prompts for each quick action
+const QUICK_ACTION_PROMPTS: Record<string, string> = {
+  surprise: '给我一个小惊喜吧！来点创意的',
+  write: '帮我写一篇文章，主题你来定',
+  research: '帮我做一个深度研究分析',
+  collect: '帮我收集整理一些有用的信息',
+  learn: '我想学点新东西，教我一些有趣的知识',
+};
 
 interface FirstConversationPromptProps {
   clone: Clone;
@@ -25,7 +51,15 @@ export function FirstConversationPrompt({
   clone,
   onSelectSuggestion,
 }: FirstConversationPromptProps) {
-  // Generate welcome message
+  const chatMode = useChatStore((s) => s.chatMode);
+
+  const modeGreeting: Record<string, string> = {
+    flash: '快速回答，即时响应',
+    thinking: '深度分析，逐步推理',
+    pro: '专业规划，系统思考',
+    ultra: '多代理协作，全能力调度',
+  };
+
   const welcomeMessage = generateWelcomeMessage({
     userName: clone.userName,
     agentName: clone.nickname || clone.name,
@@ -34,11 +68,9 @@ export function FirstConversationPrompt({
     scenarios: clone.scenarios,
   });
 
-  // Get quick start suggestions based on scenarios
-  const suggestions = getQuickStartSuggestions(clone.scenarios || []);
-
-  const handleSuggestionClick = (suggestion: QuickStartSuggestion) => {
-    onSelectSuggestion?.(suggestion.text);
+  const handleQuickAction = (key: string) => {
+    const prompt = QUICK_ACTION_PROMPTS[key] || '你好！';
+    onSelectSuggestion?.(prompt);
   };
 
   return (
@@ -48,48 +80,63 @@ export function FirstConversationPrompt({
       exit={{ opacity: 0, y: -10 }}
       className="flex flex-col items-center justify-center py-12 px-4"
     >
-      {/* Avatar with emoji */}
-      <div className="mb-6">
-        <div className="w-20 h-20 rounded-2xl bg-gradient-to-br from-primary/20 to-primary/10 dark:from-primary/30 dark:to-primary/20 flex items-center justify-center shadow-lg">
-          <span className="text-4xl">{clone.emoji || '🦞'}</span>
-        </div>
-      </div>
+      {/* Greeting emoji */}
+      <div className="text-5xl mb-4">{clone.emoji || '👋'}</div>
+
+      {/* Title */}
+      <motion.h1
+        initial={{ opacity: 0, y: 10 }}
+        animate={{ opacity: 1, y: 0 }}
+        transition={{ delay: 0.1, duration: 0.5 }}
+        className="text-2xl font-semibold text-gray-900 dark:text-gray-100 mb-2"
+      >
+        你好，欢迎回来！
+      </motion.h1>
+
+      {/* Mode-aware subtitle */}
+      <motion.p
+        initial={{ opacity: 0 }}
+        animate={{ opacity: 1 }}
+        transition={{ delay: 0.2, duration: 0.4 }}
+        className="text-sm text-orange-500 dark:text-orange-400 font-medium mb-4 flex items-center gap-1.5"
+      >
+        <Sparkles className="w-3.5 h-3.5" />
+        {modeGreeting[chatMode] || '智能对话，随时待命'}
+      </motion.p>
 
       {/* Welcome message */}
       <div className="text-center max-w-md mb-8">
-        <p className="text-lg text-gray-700 dark:text-gray-200 whitespace-pre-line leading-relaxed">
+        <p className="text-sm text-gray-500 dark:text-gray-400 leading-relaxed">
           {welcomeMessage}
         </p>
       </div>
 
-      {/* Quick start suggestions */}
-      <div className="w-full max-w-lg space-y-2">
-        <div className="flex items-center gap-2 text-sm text-gray-500 dark:text-gray-400 mb-3">
-          <Lightbulb className="w-4 h-4" />
-          <span>快速开始</span>
-        </div>
-
-        {suggestions.map((suggestion, index) => (
-          <motion.button
-            key={index}
-            initial={{ opacity: 0, x: -20 }}
-            animate={{ opacity: 1, x: 0 }}
-            transition={{ delay: index * 0.1 }}
-            onClick={() => handleSuggestionClick(suggestion)}
-            className={cn(
-              'w-full flex items-center gap-3 px-4 py-3 rounded-xl',
-              'bg-gray-50 dark:bg-gray-800/50 border border-gray-200 dark:border-gray-700',
-              'hover:bg-gray-100 dark:hover:bg-gray-800 hover:border-primary/30',
-              'transition-all duration-200 group text-left'
-            )}
-          >
-            <span className="text-xl flex-shrink-0">{suggestion.icon}</span>
-            <span className="flex-1 text-sm text-gray-700 dark:text-gray-200">
-              {suggestion.text}
-            </span>
-            <ArrowRight className="w-4 h-4 text-gray-400 group-hover:text-primary transition-colors flex-shrink-0" />
-          </motion.button>
-        ))}
+      {/* Quick action chips — DeerFlow-style horizontal colored pills */}
+      <div className="flex items-center justify-center gap-2 flex-wrap">
+        {QUICK_ACTIONS.map((action, index) => {
+          const ActionIcon = action.icon;
+          return (
+            <motion.button
+              key={action.key}
+              initial={{ opacity: 0, y: 8 }}
+              animate={{ opacity: 1, y: 0 }}
+              transition={{ delay: 0.3 + index * 0.05, duration: 0.2 }}
+              onClick={() => handleQuickAction(action.key)}
+              className={cn(
+                'flex items-center gap-2 px-4 py-2',
+                'bg-white dark:bg-gray-800',
+                'border border-gray-200 dark:border-gray-700',
+                'rounded-full text-sm text-gray-600 dark:text-gray-300',
+                'hover:border-gray-300 dark:hover:border-gray-600',
+                'hover:bg-gray-50 dark:hover:bg-gray-750',
+                'transition-all duration-150'
+              )}
+            >
+              <ActionIcon className={`w-4 h-4 ${action.color}`} />
+              <span>{action.label}</span>
+            </motion.button>
+          );
+        })}
       </div>
 
       {/* Scenario tags */}
diff --git a/desktop/src/components/Sidebar.tsx b/desktop/src/components/Sidebar.tsx
index db1fcf6..da78446 100644
--- a/desktop/src/components/Sidebar.tsx
+++ b/desktop/src/components/Sidebar.tsx
@@ -1,11 +1,11 @@
 import { useState } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
 import {
-  Bot, Zap, Package,
-  Search, ChevronRight, X
+  SquarePen, MessageSquare, Bot, Search, X, Settings
 } from 'lucide-react';
+import { ConversationList } from './ConversationList';
 import { CloneManager } from './CloneManager';
-import { useConfigStore } from '../store/configStore';
+import { useChatStore } from '../store/chatStore';
 import { containerVariants, defaultTransition } from '../lib/animations';
 
 export type MainViewType = 'chat' | 'automation' | 'skills';
@@ -16,86 +16,81 @@ interface SidebarProps {
   onNewChat?: () => void;
 }
 
-type Tab = 'chat' | 'clones' | 'automation' | 'skills';
-
-// 导航项配置 - WorkBuddy 风格
-const NAV_ITEMS: {
-  key: Tab;
-  label: string;
-  icon: React.ComponentType<{ className?: string }>;
-  mainView?: MainViewType;
-}[] = [
-  { key: 'clones', label: '分身', icon: Bot },
-  { key: 'automation', label: '自动化', icon: Zap, mainView: 'automation' },
-  { key: 'skills', label: '技能', icon: Package, mainView: 'skills' },
-];
+type Tab = 'conversations' | 'clones';
 
 export function Sidebar({
   onOpenSettings,
   onMainViewChange,
 }: Omit<SidebarProps, 'onNewChat'>) {
-  const [activeTab, setActiveTab] = useState<Tab>('clones');
+  const [activeTab, setActiveTab] = useState<Tab>('conversations');
   const [searchQuery, setSearchQuery] = useState('');
-  const userName = useConfigStore((state) => state.quickConfig?.userName) || '用户7141';
+  const newConversation = useChatStore((s) => s.newConversation);
 
-  const handleNavClick = (key: Tab, mainView?: MainViewType) => {
-    setActiveTab(key);
-    if (mainView && onMainViewChange) {
-      onMainViewChange(mainView);
-    } else if (onMainViewChange) {
-      onMainViewChange('chat');
+  const handleNewConversation = () => {
+    newConversation();
+    onMainViewChange?.('chat');
+  };
+
+  const handleNavClick = (tab: Tab) => {
+    setActiveTab(tab);
+    if (tab === 'clones') {
+      onMainViewChange?.('chat');
+    } else {
+      onMainViewChange?.('chat');
     }
   };
 
   return (
-    <aside className="w-64 bg-white dark:bg-gray-900 border-r border-gray-200 dark:border-gray-700 flex flex-col flex-shrink-0">
-      {/* 搜索框 */}
-      <div className="p-3 border-b border-gray-100 dark:border-gray-800">
-        <div className="relative">
-          <Search className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400 w-4 h-4" />
-          <input
-            type="text"
-            placeholder="搜索..."
-            value={searchQuery}
-            onChange={(e) => setSearchQuery(e.target.value)}
-            className="w-full pl-9 pr-8 py-2 bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg text-sm focus:outline-none focus:border-gray-400 focus:ring-1 focus:ring-gray-400 transition-all text-gray-700 dark:text-gray-300 placeholder-gray-400"
-          />
-          {searchQuery && (
-            <button
-              onClick={() => setSearchQuery('')}
-              className="absolute right-2 top-1/2 -translate-y-1/2 p-1 hover:bg-gray-200 dark:hover:bg-gray-700 rounded text-gray-400 transition-colors"
-            >
-              <X className="w-3 h-3" />
-            </button>
-          )}
-        </div>
+    <aside className="w-64 sidebar-bg border-r border-[#e8e6e1] dark:border-gray-800 flex flex-col h-full shrink-0">
+      {/* Logo area */}
+      <div className="h-14 flex items-center px-4 border-b border-[#e8e6e1]/50 dark:border-gray-800">
+        <span className="text-lg font-semibold tracking-tight text-gray-900 dark:text-gray-100">ZCLAW</span>
+        <button
+          onClick={handleNewConversation}
+          className="ml-auto p-1.5 hover:bg-black/5 dark:hover:bg-white/5 rounded-md transition-colors text-gray-600 dark:text-gray-400"
+          title="新对话"
+        >
+          <SquarePen className="w-4 h-4" />
+        </button>
       </div>
 
-      {/* 导航项 */}
-      <nav className="px-3 space-y-0.5">
-        {NAV_ITEMS.map(({ key, label, icon: Icon, mainView }) => (
-          <button
-            key={key}
-            onClick={() => handleNavClick(key, mainView)}
-            className={`w-full flex items-center gap-3 px-3 py-2 rounded-lg transition-colors ${
-              activeTab === key
-                ? 'bg-gray-100 dark:bg-gray-800 text-gray-900 dark:text-gray-100 font-medium'
-                : 'text-gray-600 dark:text-gray-400 hover:bg-gray-50 dark:hover:bg-gray-800/50 hover:text-gray-900 dark:hover:text-gray-200'
-            }`}
-          >
-            <Icon className={`w-5 h-5 ${activeTab === key ? 'text-gray-700 dark:text-gray-300' : 'text-gray-400'}`} />
-            <span>{label}</span>
-            {activeTab === key && (
-              <ChevronRight className="w-4 h-4 ml-auto text-gray-400" />
-            )}
-          </button>
-        ))}
-      </nav>
+      {/* Main Nav — DeerFlow-style: new chat / conversations / agents */}
+      <div className="p-2 space-y-1">
+        <button
+          onClick={handleNewConversation}
+          className="w-full flex items-center gap-3 px-3 py-2 rounded-lg bg-black/5 dark:bg-white/5 text-sm font-medium text-gray-900 dark:text-gray-100"
+        >
+          <SquarePen className="w-4 h-4" />
+          新对话
+        </button>
+        <button
+          onClick={() => handleNavClick('conversations')}
+          className={`w-full flex items-center gap-3 px-3 py-2 rounded-lg text-sm transition-colors ${
+            activeTab === 'conversations'
+              ? 'bg-black/5 dark:bg-white/5 font-medium text-gray-900 dark:text-gray-100'
+              : 'text-gray-600 dark:text-gray-400 hover:bg-black/5 dark:hover:bg-white/5'
+          }`}
+        >
+          <MessageSquare className="w-4 h-4" />
+          对话
+        </button>
+        <button
+          onClick={() => handleNavClick('clones')}
+          className={`w-full flex items-center gap-3 px-3 py-2 rounded-lg text-sm transition-colors ${
+            activeTab === 'clones'
+              ? 'bg-black/5 dark:bg-white/5 font-medium text-gray-900 dark:text-gray-100'
+              : 'text-gray-600 dark:text-gray-400 hover:bg-black/5 dark:hover:bg-white/5'
+          }`}
+        >
+          <Bot className="w-4 h-4" />
+          智能体
+        </button>
+      </div>
 
-      {/* 分隔线 */}
-      <div className="my-3 mx-3 border-t border-gray-100 dark:border-gray-800" />
+      {/* Divider */}
+      <div className="mx-3 border-t border-[#e8e6e1]/50 dark:border-gray-800" />
 
-      {/* 内容区域 - 只显示分身内容，自动化和技能在主内容区显示 */}
+      {/* Content area */}
       <div className="flex-1 overflow-hidden">
         <AnimatePresence mode="wait">
           <motion.div
@@ -107,27 +102,45 @@ export function Sidebar({
             transition={defaultTransition}
             className="h-full overflow-y-auto"
           >
+            {activeTab === 'conversations' && (
+              <div className="p-2">
+                {/* Search in conversations */}
+                <div className="relative mb-2">
+                  <Search className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400 w-4 h-4" />
+                  <input
+                    type="text"
+                    placeholder="搜索对话..."
+                    value={searchQuery}
+                    onChange={(e) => setSearchQuery(e.target.value)}
+                    className="w-full pl-9 pr-8 py-1.5 bg-white/60 dark:bg-gray-800 border border-[#e8e6e1] dark:border-gray-700 rounded-lg text-sm focus:outline-none focus:border-gray-400 transition-all text-gray-700 dark:text-gray-300 placeholder-gray-400"
+                  />
+                  {searchQuery && (
+                    <button
+                      onClick={() => setSearchQuery('')}
+                      className="absolute right-2 top-1/2 -translate-y-1/2 p-1 hover:bg-gray-200 dark:hover:bg-gray-700 rounded text-gray-400"
+                    >
+                      <X className="w-3 h-3" />
+                    </button>
+                  )}
+                </div>
+                <ConversationList />
+              </div>
+            )}
             {activeTab === 'clones' && <CloneManager />}
-            {/* skills 和 automation 不在侧边栏显示内容，由主内容区显示 */}
           </motion.div>
         </AnimatePresence>
       </div>
 
-      {/* 底部用户栏 */}
-      <div className="p-3 border-t border-gray-200 dark:border-gray-700">
+      {/* Bottom user bar */}
+      <div className="p-2 border-t border-[#e8e6e1] dark:border-gray-700">
         <button
           onClick={onOpenSettings}
           aria-label="打开设置"
-          title="设置"
-          className="flex items-center gap-3 w-full hover:bg-gray-50 dark:hover:bg-gray-800 p-2 rounded-lg transition-colors"
+          title="设置和更多"
+          className="w-full flex items-center gap-3 px-3 py-2 rounded-lg text-sm text-gray-600 dark:text-gray-400 hover:bg-black/5 dark:hover:bg-white/5 transition-colors"
         >
-          <div className="w-8 h-8 bg-gray-600 rounded-full flex items-center justify-center text-white font-bold shadow-sm">
-            {userName?.charAt(0) || '用'}
-          </div>
-          <span className="flex-1 text-left text-sm font-medium text-gray-700 dark:text-gray-300 truncate">
-            {userName}
-          </span>
-          <ChevronRight className="w-4 h-4 text-gray-400" />
+          <Settings className="w-4 h-4" />
+          <span>设置和更多</span>
         </button>
       </div>
     </aside>
diff --git a/desktop/src/components/ai/ArtifactPanel.tsx b/desktop/src/components/ai/ArtifactPanel.tsx
new file mode 100644
index 0000000..d1d0749
--- /dev/null
+++ b/desktop/src/components/ai/ArtifactPanel.tsx
@@ -0,0 +1,302 @@
+import { useState, useMemo } from 'react';
+import {
+  FileText,
+  FileCode2,
+  Table2,
+  Image as ImageIcon,
+  Download,
+  Copy,
+  ChevronLeft,
+  File,
+} from 'lucide-react';
+
+// ---------------------------------------------------------------------------
+// Types
+// ---------------------------------------------------------------------------
+
+export interface ArtifactFile {
+  id: string;
+  name: string;
+  type: 'markdown' | 'code' | 'table' | 'image' | 'text';
+  content: string;
+  language?: string;
+  createdAt: Date;
+  sourceStepId?: string; // Links to ToolCallStep that created this artifact
+}
+
+interface ArtifactPanelProps {
+  artifacts: ArtifactFile[];
+  selectedId?: string | null;
+  onSelect: (id: string) => void;
+  onClose?: () => void;
+  className?: string;
+}
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+function getFileIcon(type: ArtifactFile['type']) {
+  switch (type) {
+    case 'markdown': return FileText;
+    case 'code': return FileCode2;
+    case 'table': return Table2;
+    case 'image': return ImageIcon;
+    default: return File;
+  }
+}
+
+function getTypeLabel(type: ArtifactFile['type']): string {
+  switch (type) {
+    case 'markdown': return 'MD';
+    case 'code': return 'CODE';
+    case 'table': return 'TABLE';
+    case 'image': return 'IMG';
+    default: return 'TXT';
+  }
+}
+
+function getTypeColor(type: ArtifactFile['type']): string {
+  switch (type) {
+    case 'markdown': return 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-300';
+    case 'code': return 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-300';
+    case 'table': return 'bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-300';
+    case 'image': return 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-300';
+    default: return 'bg-gray-100 text-gray-700 dark:bg-gray-700 dark:text-gray-300';
+  }
+}
+
+// ---------------------------------------------------------------------------
+// ArtifactPanel
+// ---------------------------------------------------------------------------
+
+export function ArtifactPanel({
+  artifacts,
+  selectedId,
+  onSelect,
+  onClose: _onClose,
+  className = '',
+}: ArtifactPanelProps) {
+  const [viewMode, setViewMode] = useState<'preview' | 'code'>('preview');
+  const selected = useMemo(
+    () => artifacts.find((a) => a.id === selectedId),
+    [artifacts, selectedId]
+  );
+
+  // List view when no artifact is selected
+  if (!selected) {
+    return (
+      <div className={`h-full flex flex-col ${className}`}>
+        <div className="p-4 flex-1 overflow-y-auto custom-scrollbar">
+          {artifacts.length === 0 ? (
+            <div className="flex flex-col items-center justify-center h-full text-gray-400 dark:text-gray-500">
+              <FileText className="w-8 h-8 mb-2 opacity-50" />
+              <p className="text-sm">暂无产物文件</p>
+              <p className="text-xs mt-1">Agent 生成文件后将在此显示</p>
+            </div>
+          ) : (
+            <div className="space-y-2">
+              {artifacts.map((artifact) => {
+                const Icon = getFileIcon(artifact.type);
+                return (
+                  <button
+                    key={artifact.id}
+                    onClick={() => onSelect(artifact.id)}
+                    className="w-full flex items-center gap-3 p-3 rounded-lg border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 hover:bg-gray-50 dark:hover:bg-gray-750 transition-colors text-left group"
+                  >
+                    <Icon className="w-5 h-5 text-gray-400 flex-shrink-0 group-hover:text-orange-500 transition-colors" />
+                    <div className="flex-1 min-w-0">
+                      <p className="text-sm font-medium text-gray-700 dark:text-gray-200 truncate">
+                        {artifact.name}
+                      </p>
+                      <div className="flex items-center gap-2 mt-0.5">
+                        <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${getTypeColor(artifact.type)}`}>
+                          {getTypeLabel(artifact.type)}
+                        </span>
+                        <span className="text-[11px] text-gray-400 dark:text-gray-500">
+                          {new Date(artifact.createdAt).toLocaleTimeString()}
+                        </span>
+                      </div>
+                    </div>
+                  </button>
+                );
+              })}
+            </div>
+          )}
+        </div>
+      </div>
+    );
+  }
+
+  // Detail view
+  const Icon = getFileIcon(selected.type);
+
+  return (
+    <div className={`h-full flex flex-col ${className}`}>
+      {/* File header */}
+      <div className="px-4 py-2 border-b border-gray-200 dark:border-gray-700 flex items-center gap-2 flex-shrink-0">
+        <button
+          onClick={() => onSelect('')}
+          className="p-1 rounded hover:bg-gray-100 dark:hover:bg-gray-700 text-gray-400 hover:text-gray-600 dark:hover:text-gray-200 transition-colors"
+          title="返回文件列表"
+        >
+          <ChevronLeft className="w-4 h-4" />
+        </button>
+        <Icon className="w-4 h-4 text-orange-500 flex-shrink-0" />
+        <span className="text-sm font-medium text-gray-700 dark:text-gray-200 truncate flex-1">
+          {selected.name}
+        </span>
+        <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${getTypeColor(selected.type)}`}>
+          {getTypeLabel(selected.type)}
+        </span>
+      </div>
+
+      {/* View mode toggle */}
+      <div className="px-4 py-1.5 border-b border-gray-100 dark:border-gray-800 flex items-center gap-1 flex-shrink-0">
+        <button
+          onClick={() => setViewMode('preview')}
+          className={`px-2.5 py-1 rounded text-xs font-medium transition-colors ${
+            viewMode === 'preview'
+              ? 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-300'
+              : 'text-gray-500 hover:text-gray-700 dark:hover:text-gray-300'
+          }`}
+        >
+          预览
+        </button>
+        <button
+          onClick={() => setViewMode('code')}
+          className={`px-2.5 py-1 rounded text-xs font-medium transition-colors ${
+            viewMode === 'code'
+              ? 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-300'
+              : 'text-gray-500 hover:text-gray-700 dark:hover:text-gray-300'
+          }`}
+        >
+          源码
+        </button>
+      </div>
+
+      {/* Content area */}
+      <div className="flex-1 overflow-y-auto custom-scrollbar p-4">
+        {viewMode === 'preview' ? (
+          <div className="prose prose-sm dark:prose-invert max-w-none">
+            {selected.type === 'markdown' ? (
+              <MarkdownPreview content={selected.content} />
+            ) : selected.type === 'code' ? (
+              <pre className="bg-gray-50 dark:bg-gray-800 rounded-lg p-3 text-xs font-mono overflow-x-auto text-gray-700 dark:text-gray-200">
+                {selected.content}
+              </pre>
+            ) : (
+              <pre className="whitespace-pre-wrap text-sm text-gray-700 dark:text-gray-200">
+                {selected.content}
+              </pre>
+            )}
+          </div>
+        ) : (
+          <pre className="bg-gray-50 dark:bg-gray-800 rounded-lg p-3 text-xs font-mono overflow-x-auto text-gray-700 dark:text-gray-200 leading-relaxed">
+            {selected.content}
+          </pre>
+        )}
+      </div>
+
+      {/* Action bar */}
+      <div className="px-4 py-2 border-t border-gray-200 dark:border-gray-700 flex items-center gap-2 flex-shrink-0">
+        <ActionButton
+          icon={<Copy className="w-3.5 h-3.5" />}
+          label="复制"
+          onClick={() => navigator.clipboard.writeText(selected.content)}
+        />
+        <ActionButton
+          icon={<Download className="w-3.5 h-3.5" />}
+          label="下载"
+          onClick={() => downloadArtifact(selected)}
+        />
+      </div>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// ActionButton
+// ---------------------------------------------------------------------------
+
+function ActionButton({ icon, label, onClick }: { icon: React.ReactNode; label: string; onClick: () => void }) {
+  const [copied, setCopied] = useState(false);
+
+  const handleClick = () => {
+    onClick();
+    if (label === '复制') {
+      setCopied(true);
+      setTimeout(() => setCopied(false), 1500);
+    }
+  };
+
+  return (
+    <button
+      onClick={handleClick}
+      className="flex items-center gap-1.5 px-2.5 py-1.5 rounded-md text-xs font-medium text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200 hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors"
+    >
+      {copied ? <span className="text-green-500 text-xs">已复制</span> : icon}
+      {!copied && label}
+    </button>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Simple Markdown preview (no external deps)
+// ---------------------------------------------------------------------------
+
+function MarkdownPreview({ content }: { content: string }) {
+  // Basic markdown rendering: headings, bold, code blocks, lists
+  const lines = content.split('\n');
+
+  return (
+    <div className="space-y-2">
+      {lines.map((line, i) => {
+        // Heading
+        if (line.startsWith('### ')) {
+          return <h3 key={i} className="text-sm font-bold text-gray-800 dark:text-gray-100 mt-3">{line.slice(4)}</h3>;
+        }
+        if (line.startsWith('## ')) {
+          return <h2 key={i} className="text-base font-bold text-gray-800 dark:text-gray-100 mt-4">{line.slice(3)}</h2>;
+        }
+        if (line.startsWith('# ')) {
+          return <h1 key={i} className="text-lg font-bold text-gray-800 dark:text-gray-100">{line.slice(2)}</h1>;
+        }
+        // Code block (simplified)
+        if (line.startsWith('```')) return null;
+        // List item
+        if (line.startsWith('- ') || line.startsWith('* ')) {
+          return <li key={i} className="text-sm text-gray-700 dark:text-gray-300 ml-4">{renderInline(line.slice(2))}</li>;
+        }
+        // Empty line
+        if (!line.trim()) return <div key={i} className="h-2" />;
+        // Regular paragraph
+        return <p key={i} className="text-sm text-gray-700 dark:text-gray-300 leading-relaxed">{renderInline(line)}</p>;
+      })}
+    </div>
+  );
+}
+
+function renderInline(text: string): React.ReactNode {
+  // Bold
+  const parts = text.split(/\*\*(.*?)\*\*/g);
+  return parts.map((part, i) =>
+    i % 2 === 1 ? <strong key={i} className="font-semibold">{part}</strong> : part
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Download helper
+// ---------------------------------------------------------------------------
+
+function downloadArtifact(artifact: ArtifactFile) {
+  const blob = new Blob([artifact.content], { type: 'text/plain;charset=utf-8' });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = artifact.name;
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  URL.revokeObjectURL(url);
+}
diff --git a/desktop/src/components/ai/ChatMode.tsx b/desktop/src/components/ai/ChatMode.tsx
new file mode 100644
index 0000000..b0e55f8
--- /dev/null
+++ b/desktop/src/components/ai/ChatMode.tsx
@@ -0,0 +1,133 @@
+import { useState, useRef, useEffect } from 'react';
+import { Zap, Lightbulb, GraduationCap, Rocket, Check } from 'lucide-react';
+import { motion, AnimatePresence } from 'framer-motion';
+
+/**
+ * Chat interaction mode selector — DeerFlow-style dropdown.
+ *
+ * A single trigger button in the input bar that opens an upward dropdown
+ * showing each mode with icon, title, description, and checkmark.
+ */
+
+export type ChatModeType = 'flash' | 'thinking' | 'pro' | 'ultra';
+
+export interface ChatModeConfig {
+  thinking_enabled: boolean;
+  reasoning_effort?: 'low' | 'medium' | 'high';
+  plan_mode?: boolean;
+  subagent_enabled?: boolean;
+}
+
+export const CHAT_MODES: Record<ChatModeType, { label: string; icon: typeof Zap; config: ChatModeConfig; description: string }> = {
+  flash: {
+    label: '闪速',
+    icon: Zap,
+    config: { thinking_enabled: false },
+    description: '快速且高效的完成任务，但可能不够精准',
+  },
+  thinking: {
+    label: '思考',
+    icon: Lightbulb,
+    config: { thinking_enabled: true, reasoning_effort: 'low' },
+    description: '启用推理，低强度思考',
+  },
+  pro: {
+    label: 'Pro',
+    icon: GraduationCap,
+    config: { thinking_enabled: true, reasoning_effort: 'medium', plan_mode: true },
+    description: '思考、计划再执行，获得更精准的结果，可能需要更多时间',
+  },
+  ultra: {
+    label: 'Ultra',
+    icon: Rocket,
+    config: { thinking_enabled: true, reasoning_effort: 'high', plan_mode: true, subagent_enabled: true },
+    description: '继承自 Pro 模式，可调用子代理分工协作，适合复杂多步骤任务，能力最强',
+  },
+};
+
+interface ChatModeProps {
+  value: ChatModeType;
+  onChange: (mode: ChatModeType) => void;
+  disabled?: boolean;
+}
+
+export function ChatMode({ value, onChange, disabled = false }: ChatModeProps) {
+  const [open, setOpen] = useState(false);
+  const containerRef = useRef<HTMLDivElement>(null);
+
+  // Close on outside click
+  useEffect(() => {
+    if (!open) return;
+    const handler = (e: MouseEvent) => {
+      if (containerRef.current && !containerRef.current.contains(e.target as Node)) {
+        setOpen(false);
+      }
+    };
+    document.addEventListener('mousedown', handler);
+    return () => document.removeEventListener('mousedown', handler);
+  }, [open]);
+
+  const current = CHAT_MODES[value];
+  const Icon = current.icon;
+
+  return (
+    <div ref={containerRef} className="relative">
+      {/* Trigger button */}
+      <button
+        onClick={() => { if (!disabled) setOpen(!open); }}
+        disabled={disabled}
+        className="flex items-center gap-1.5 px-2 py-1.5 rounded-lg text-sm text-gray-600 dark:text-gray-400 hover:bg-black/5 dark:hover:bg-white/5 transition-colors disabled:opacity-50"
+      >
+        <Icon className="w-3.5 h-3.5" />
+        <span>{current.label}</span>
+      </button>
+
+      {/* Dropdown — pops up above the input bar */}
+      <AnimatePresence>
+        {open && !disabled && (
+          <motion.div
+            initial={{ opacity: 0, y: 4, scale: 0.95 }}
+            animate={{ opacity: 1, y: 0, scale: 1 }}
+            exit={{ opacity: 0, y: 4, scale: 0.95 }}
+            transition={{ duration: 0.12 }}
+            className="absolute bottom-full left-0 mb-2 w-80 bg-white dark:bg-gray-800 rounded-xl shadow-xl border border-gray-100 dark:border-gray-700 py-2 z-50"
+          >
+            <div className="px-3 py-2 text-xs text-gray-400 font-medium">模式</div>
+            <div className="space-y-1">
+              {(Object.entries(CHAT_MODES) as [ChatModeType, typeof CHAT_MODES.flash][]).map(([mode, def]) => {
+                const ModeIcon = def.icon;
+                const isActive = value === mode;
+
+                return (
+                  <button
+                    key={mode}
+                    onClick={() => {
+                      onChange(mode);
+                      setOpen(false);
+                    }}
+                    className="w-full text-left px-3 py-3 hover:bg-gray-50 dark:hover:bg-gray-700/50 flex items-start gap-3 transition-colors"
+                  >
+                    <div className="mt-0.5">
+                      <ModeIcon className={`w-4 h-4 ${isActive ? 'text-gray-900 dark:text-white' : 'text-gray-500 dark:text-gray-400'}`} />
+                    </div>
+                    <div className="flex-1">
+                      <div className="flex items-center justify-between">
+                        <span className={`font-medium text-sm ${isActive ? 'text-gray-900 dark:text-white' : 'text-gray-700 dark:text-gray-300'}`}>
+                          {def.label}
+                        </span>
+                        {isActive && (
+                          <Check className="w-3.5 h-3.5 text-gray-900 dark:text-white" />
+                        )}
+                      </div>
+                      <p className="text-xs text-gray-500 dark:text-gray-400 mt-0.5">{def.description}</p>
+                    </div>
+                  </button>
+                );
+              })}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/Conversation.tsx b/desktop/src/components/ai/Conversation.tsx
new file mode 100644
index 0000000..675a88a
--- /dev/null
+++ b/desktop/src/components/ai/Conversation.tsx
@@ -0,0 +1,117 @@
+import { useRef, useEffect, useState, createContext, useContext, useMemo, type ReactNode } from 'react';
+
+// ---------------------------------------------------------------------------
+// ConversationContext — shared state for child ai-elements components
+// ---------------------------------------------------------------------------
+
+interface ConversationContextValue {
+  isStreaming: boolean;
+  setIsStreaming: (v: boolean) => void;
+  messages: unknown[];
+  setMessages: (msgs: unknown[]) => void;
+}
+
+const ConversationContext = createContext<ConversationContextValue | null>(null);
+
+export function useConversationContext() {
+  const ctx = useContext(ConversationContext);
+  if (!ctx) {
+    throw new Error('useConversationContext must be used within ConversationProvider');
+  }
+  return ctx;
+}
+
+export function ConversationProvider({ children }: { children: ReactNode }) {
+  const [isStreaming, setIsStreaming] = useState(false);
+  const [messages, setMessages] = useState<unknown[]>([]);
+
+  const value = useMemo(
+    () => ({ isStreaming, setIsStreaming, messages, setMessages }),
+    [isStreaming, messages],
+  );
+
+  return (
+    <ConversationContext.Provider value={value}>
+      {children}
+    </ConversationContext.Provider>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Conversation container with auto-stick-to-bottom scroll behavior
+// ---------------------------------------------------------------------------
+
+/**
+ * Conversation container with auto-stick-to-bottom scroll behavior.
+ *
+ * Inspired by DeerFlow's use-stick-to-bottom pattern:
+ * - Stays pinned to bottom during streaming
+ * - Remembers user's scroll position when they scroll up
+ * - Auto-scrolls back to bottom on new content when near the bottom
+ */
+interface ConversationProps {
+  children: ReactNode;
+  className?: string;
+}
+
+const SCROLL_THRESHOLD = 80; // px from bottom to consider "at bottom"
+
+export function Conversation({ children, className = '' }: ConversationProps) {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const isAtBottomRef = useRef(true);
+  const observerRef = useRef<ResizeObserver | null>(null);
+
+  // Track whether user is near the bottom
+  const handleScroll = () => {
+    const el = containerRef.current;
+    if (!el) return;
+    const distanceFromBottom = el.scrollHeight - el.scrollTop - el.clientHeight;
+    isAtBottomRef.current = distanceFromBottom < SCROLL_THRESHOLD;
+  };
+
+  // Auto-scroll to bottom when content changes and user is at bottom
+  useEffect(() => {
+    const el = containerRef.current;
+    if (!el) return;
+
+    observerRef.current = new ResizeObserver(() => {
+      if (isAtBottomRef.current) {
+        el.scrollTop = el.scrollHeight;
+      }
+    });
+
+    observerRef.current.observe(el);
+
+    return () => {
+      observerRef.current?.disconnect();
+    };
+  }, []);
+
+  // Also observe child list changes (new messages)
+  useEffect(() => {
+    const el = containerRef.current;
+    if (!el) return;
+
+    const mutationObserver = new MutationObserver(() => {
+      if (isAtBottomRef.current) {
+        el.scrollTop = el.scrollHeight;
+      }
+    });
+
+    mutationObserver.observe(el, { childList: true, subtree: true });
+
+    return () => {
+      mutationObserver.disconnect();
+    };
+  }, []);
+
+  return (
+    <div
+      ref={containerRef}
+      onScroll={handleScroll}
+      className={`overflow-y-auto custom-scrollbar ${className}`}
+    >
+      {children}
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/ModelSelector.tsx b/desktop/src/components/ai/ModelSelector.tsx
new file mode 100644
index 0000000..517df0e
--- /dev/null
+++ b/desktop/src/components/ai/ModelSelector.tsx
@@ -0,0 +1,140 @@
+import { useState, useRef, useEffect } from 'react';
+import { ChevronDown, Check } from 'lucide-react';
+import { motion, AnimatePresence } from 'framer-motion';
+
+/**
+ * Model selector dropdown.
+ *
+ * Inspired by DeerFlow's model-selector.tsx:
+ * - Searchable dropdown with keyboard navigation
+ * - Shows model provider badge
+ * - Compact design that fits in the input area
+ */
+
+interface ModelOption {
+  id: string;
+  name: string;
+  provider?: string;
+}
+
+interface ModelSelectorProps {
+  models: ModelOption[];
+  currentModel: string;
+  onSelect: (modelId: string) => void;
+  disabled?: boolean;
+}
+
+export function ModelSelector({
+  models,
+  currentModel,
+  onSelect,
+  disabled = false,
+}: ModelSelectorProps) {
+  const [open, setOpen] = useState(false);
+  const [search, setSearch] = useState('');
+  const containerRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const selectedModel = models.find(m => m.id === currentModel);
+  const filteredModels = search
+    ? models.filter(m =>
+        m.name.toLowerCase().includes(search.toLowerCase()) ||
+        (m.provider && m.provider.toLowerCase().includes(search.toLowerCase()))
+      )
+    : models;
+
+  // Close on outside click
+  useEffect(() => {
+    if (!open) return;
+    const handler = (e: MouseEvent) => {
+      if (containerRef.current && !containerRef.current.contains(e.target as Node)) {
+        setOpen(false);
+        setSearch('');
+      }
+    };
+    document.addEventListener('mousedown', handler);
+    return () => document.removeEventListener('mousedown', handler);
+  }, [open]);
+
+  // Focus search on open
+  useEffect(() => {
+    if (open && inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [open]);
+
+  return (
+    <div ref={containerRef} className="relative">
+      <button
+        onClick={() => { if (!disabled) setOpen(!open); }}
+        disabled={disabled}
+        className="flex items-center gap-1 text-xs text-gray-500 dark:text-gray-400 hover:bg-gray-200 dark:hover:bg-gray-700 px-2 py-1 rounded-md transition-colors disabled:opacity-50"
+        aria-expanded={open}
+        aria-haspopup="listbox"
+      >
+        <span className="max-w-[120px] truncate">{selectedModel?.name || currentModel}</span>
+        <ChevronDown className={`w-3 h-3 transition-transform ${open ? 'rotate-180' : ''}`} />
+      </button>
+
+      <AnimatePresence>
+        {open && (
+          <motion.div
+            initial={{ opacity: 0, y: 4, scale: 0.95 }}
+            animate={{ opacity: 1, y: 0, scale: 1 }}
+            exit={{ opacity: 0, y: 4, scale: 0.95 }}
+            transition={{ duration: 0.12 }}
+            className="absolute bottom-full right-0 mb-2 w-56 bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg shadow-lg z-20 overflow-hidden"
+          >
+            {/* Search */}
+            <div className="p-2 border-b border-gray-100 dark:border-gray-700">
+              <input
+                ref={inputRef}
+                value={search}
+                onChange={e => setSearch(e.target.value)}
+                placeholder="搜索模型..."
+                className="w-full bg-transparent text-xs text-gray-700 dark:text-gray-200 placeholder-gray-400 outline-none"
+              />
+            </div>
+
+            {/* Model list */}
+            <div className="max-h-48 overflow-y-auto py-1" role="listbox">
+              {filteredModels.length > 0 ? (
+                filteredModels.map(model => (
+                  <button
+                    key={model.id}
+                    onClick={() => {
+                      onSelect(model.id);
+                      setOpen(false);
+                      setSearch('');
+                    }}
+                    role="option"
+                    aria-selected={model.id === currentModel}
+                    className={`
+                      w-full text-left px-3 py-2 text-xs flex items-center justify-between gap-2 transition-colors
+                      ${model.id === currentModel
+                        ? 'text-orange-600 dark:text-orange-400 bg-orange-50 dark:bg-orange-900/20'
+                        : 'text-gray-700 dark:text-gray-300 hover:bg-gray-50 dark:hover:bg-gray-700'
+                      }
+                    `}
+                  >
+                    <div className="flex flex-col min-w-0">
+                      <span className="truncate font-medium">{model.name}</span>
+                      {model.provider && (
+                        <span className="text-[10px] text-gray-400 dark:text-gray-500">{model.provider}</span>
+                      )}
+                    </div>
+                    {model.id === currentModel && (
+                      <Check className="w-3.5 h-3.5 flex-shrink-0" />
+                    )}
+                  </button>
+                ))
+              ) : (
+                <div className="px-3 py-2 text-xs text-gray-400">无匹配模型</div>
+              )}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/ReasoningBlock.tsx b/desktop/src/components/ai/ReasoningBlock.tsx
new file mode 100644
index 0000000..fb0c99b
--- /dev/null
+++ b/desktop/src/components/ai/ReasoningBlock.tsx
@@ -0,0 +1,156 @@
+import { useState, useEffect } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+import { ChevronRight, Lightbulb } from 'lucide-react';
+
+/**
+ * Collapsible reasoning/thinking block with timing display.
+ *
+ * Inspired by DeerFlow's reasoning display:
+ * - Shows elapsed time during streaming ("Thinking for 3s...")
+ * - Shows final time when complete ("Thought for 5 seconds")
+ * - Animated expand/collapse
+ * - Auto-collapses 1 second after streaming ends
+ */
+interface ReasoningBlockProps {
+  content: string;
+  isStreaming?: boolean;
+  defaultExpanded?: boolean;
+  /** Unix timestamp (ms) when thinking started, for elapsed time display */
+  startedAt?: number;
+}
+
+export function ReasoningBlock({
+  content,
+  isStreaming = false,
+  defaultExpanded = false,
+  startedAt,
+}: ReasoningBlockProps) {
+  const [expanded, setExpanded] = useState(defaultExpanded || isStreaming);
+  const [elapsedSeconds, setElapsedSeconds] = useState(0);
+
+  // Auto-expand when streaming starts
+  useEffect(() => {
+    if (isStreaming) setExpanded(true);
+  }, [isStreaming]);
+
+  // Auto-collapse 1 second after streaming ends
+  const [prevStreaming, setPrevStreaming] = useState(isStreaming);
+  useEffect(() => {
+    if (prevStreaming && !isStreaming && expanded) {
+      const timer = setTimeout(() => setExpanded(false), 1000);
+      return () => clearTimeout(timer);
+    }
+    setPrevStreaming(isStreaming);
+  }, [isStreaming, prevStreaming, expanded]);
+
+  // Timer for elapsed seconds display
+  useEffect(() => {
+    if (!isStreaming || !startedAt) return;
+    const interval = setInterval(() => {
+      setElapsedSeconds(Math.floor((Date.now() - startedAt) / 1000));
+    }, 200);
+    return () => clearInterval(interval);
+  }, [isStreaming, startedAt]);
+
+  // Final duration (when streaming ends, calculate from startedAt to now)
+  const durationLabel = (() => {
+    if (!startedAt) return null;
+    if (isStreaming) {
+      return elapsedSeconds > 0 ? `已思考 ${elapsedSeconds} 秒` : '思考中...';
+    }
+    // Streaming finished — show "Thought for N seconds"
+    const totalSec = Math.floor((Date.now() - startedAt) / 1000);
+    if (totalSec <= 0) return null;
+    return `思考了 ${totalSec} 秒`;
+  })();
+
+  if (!content) return null;
+
+  return (
+    <div className="my-2">
+      <button
+        onClick={() => setExpanded(!expanded)}
+        className="flex items-center gap-1.5 text-xs text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200 transition-colors group w-full text-left"
+        aria-expanded={expanded}
+      >
+        <motion.span
+          animate={{ rotate: expanded ? 90 : 0 }}
+          transition={{ duration: 0.15 }}
+        >
+          <ChevronRight className="w-3.5 h-3.5" />
+        </motion.span>
+        <Lightbulb className="w-3.5 h-3.5 text-amber-500" />
+        <span className="font-medium">思考过程</span>
+        {durationLabel && !isStreaming && (
+          <span className="text-[11px] text-gray-400 dark:text-gray-500 ml-1">
+            {durationLabel}
+          </span>
+        )}
+        {isStreaming && (
+          <span className="flex gap-0.5 ml-1">
+            <span className="w-1 h-1 bg-amber-500 rounded-full animate-bounce" style={{ animationDelay: '0ms' }} />
+            <span className="w-1 h-1 bg-amber-500 rounded-full animate-bounce" style={{ animationDelay: '150ms' }} />
+            <span className="w-1 h-1 bg-amber-500 rounded-full animate-bounce" style={{ animationDelay: '300ms' }} />
+          </span>
+        )}
+      </button>
+
+      <AnimatePresence>
+        {expanded && (
+          <motion.div
+            initial={{ height: 0, opacity: 0 }}
+            animate={{ height: 'auto', opacity: 1 }}
+            exit={{ height: 0, opacity: 0 }}
+            transition={{ duration: 0.2, ease: 'easeInOut' }}
+            className="overflow-hidden"
+          >
+            <div className="mt-1.5 ml-5 pl-3 border-l-2 border-amber-300 dark:border-amber-700 text-xs text-gray-600 dark:text-gray-400 leading-relaxed whitespace-pre-wrap">
+              {content}
+              {isStreaming && (
+                <span className="inline-block w-1 h-3 bg-amber-500 animate-pulse ml-0.5 align-text-bottom rounded-sm" />
+              )}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
+
+/**
+ * Chain of thought step display.
+ * Shows individual reasoning steps with status indicators.
+ */
+interface ThoughtStep {
+  id: string;
+  content: string;
+  status: 'thinking' | 'done' | 'error';
+}
+
+interface ChainOfThoughtProps {
+  steps: ThoughtStep[];
+  className?: string;
+}
+
+export function ChainOfThought({ steps, className = '' }: ChainOfThoughtProps) {
+  return (
+    <div className={`ml-5 space-y-2 ${className}`}>
+      {steps.map((step) => (
+        <div key={step.id} className="flex items-start gap-2">
+          <div className="mt-1 flex-shrink-0">
+            {step.status === 'thinking' ? (
+              <span className="w-2 h-2 bg-amber-400 rounded-full animate-pulse" />
+            ) : step.status === 'done' ? (
+              <span className="w-2 h-2 bg-green-500 rounded-full" />
+            ) : (
+              <span className="w-2 h-2 bg-red-500 rounded-full" />
+            )}
+          </div>
+          <span className="text-xs text-gray-600 dark:text-gray-400 leading-relaxed">
+            {step.content}
+          </span>
+        </div>
+      ))}
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/ResizableChatLayout.tsx b/desktop/src/components/ai/ResizableChatLayout.tsx
new file mode 100644
index 0000000..5eba9a6
--- /dev/null
+++ b/desktop/src/components/ai/ResizableChatLayout.tsx
@@ -0,0 +1,136 @@
+import { useCallback, type ReactNode } from 'react';
+import { Group, Panel, Separator } from 'react-resizable-panels';
+import { X, PanelRightOpen, PanelRightClose } from 'lucide-react';
+
+/**
+ * Resizable dual-panel layout for chat + artifact/detail panel.
+ *
+ * Uses react-resizable-panels v4 API:
+ * - Left panel: Chat area (always visible)
+ * - Right panel: Artifact/detail viewer (collapsible)
+ * - Draggable resize handle between panels
+ * - Persisted panel sizes via localStorage
+ */
+
+interface ResizableChatLayoutProps {
+  chatPanel: ReactNode;
+  rightPanel?: ReactNode;
+  rightPanelTitle?: string;
+  rightPanelOpen?: boolean;
+  onRightPanelToggle?: (open: boolean) => void;
+}
+
+const STORAGE_KEY = 'zclaw-layout-panels';
+const LEFT_PANEL_ID = 'chat-panel';
+const RIGHT_PANEL_ID = 'detail-panel';
+
+function loadPanelSizes(): { left: string; right: string } {
+  try {
+    const stored = localStorage.getItem(STORAGE_KEY);
+    if (stored) {
+      const parsed = JSON.parse(stored);
+      if (parsed.left && parsed.right) {
+        return { left: parsed.left, right: parsed.right };
+      }
+    }
+  } catch { /* ignore */ }
+  return { left: '65%', right: '35%' };
+}
+
+function savePanelSizes(layout: Record<string, number>) {
+  try {
+    const left = layout[LEFT_PANEL_ID];
+    const right = layout[RIGHT_PANEL_ID];
+    if (left !== undefined && right !== undefined) {
+      localStorage.setItem(STORAGE_KEY, JSON.stringify({ left, right }));
+    }
+  } catch { /* ignore */ }
+}
+
+export function ResizableChatLayout({
+  chatPanel,
+  rightPanel,
+  rightPanelTitle = '详情',
+  rightPanelOpen = false,
+  onRightPanelToggle,
+}: ResizableChatLayoutProps) {
+  const sizes = loadPanelSizes();
+
+  const handleToggle = useCallback(() => {
+    onRightPanelToggle?.(!rightPanelOpen);
+  }, [rightPanelOpen, onRightPanelToggle]);
+
+  if (!rightPanelOpen || !rightPanel) {
+    return (
+      <div className="flex-1 flex flex-col overflow-hidden relative">
+        {chatPanel}
+        <button
+          onClick={handleToggle}
+          className="absolute top-3 right-3 z-10 p-1.5 rounded-md bg-white/80 dark:bg-gray-800/80 border border-gray-200 dark:border-gray-700 text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200 hover:bg-white dark:hover:bg-gray-800 transition-colors shadow-sm"
+          title="打开侧面板"
+        >
+          <PanelRightOpen className="w-4 h-4" />
+        </button>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex-1 flex flex-col overflow-hidden">
+      <Group
+        orientation="horizontal"
+        onLayoutChanged={(layout) => savePanelSizes(layout)}
+      >
+        {/* Left panel: Chat */}
+        <Panel
+          id={LEFT_PANEL_ID}
+          defaultSize={sizes.left}
+          minSize="40%"
+        >
+          <div className="h-full flex flex-col relative">
+            {chatPanel}
+            <button
+              onClick={handleToggle}
+              className="absolute top-3 right-3 z-10 p-1.5 rounded-md bg-white/80 dark:bg-gray-800/80 border border-gray-200 dark:border-gray-700 text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200 hover:bg-white dark:hover:bg-gray-800 transition-colors shadow-sm"
+              title="关闭侧面板"
+            >
+              <PanelRightClose className="w-4 h-4" />
+            </button>
+          </div>
+        </Panel>
+
+        {/* Resize handle */}
+        <Separator className="w-1.5 flex items-center justify-center group cursor-col-resize hover:bg-orange-100 dark:hover:bg-orange-900/20 transition-colors">
+          <div className="w-0.5 h-8 rounded-full bg-gray-300 dark:bg-gray-600 group-hover:bg-orange-400 dark:group-hover:bg-orange-500 transition-colors" />
+        </Separator>
+
+        {/* Right panel: Artifact/Detail */}
+        <Panel
+          id={RIGHT_PANEL_ID}
+          defaultSize={sizes.right}
+          minSize="25%"
+        >
+          <div className="h-full flex flex-col bg-gray-50 dark:bg-gray-900 border-l border-gray-200 dark:border-gray-800">
+            {/* Panel header */}
+            <div className="h-12 flex items-center justify-between px-4 border-b border-gray-200 dark:border-gray-800 flex-shrink-0">
+              <span className="text-xs font-medium text-gray-600 dark:text-gray-400 uppercase tracking-wide">
+                {rightPanelTitle}
+              </span>
+              <button
+                onClick={handleToggle}
+                className="p-1 rounded text-gray-400 hover:text-gray-600 dark:hover:text-gray-200 transition-colors"
+                title="关闭面板"
+              >
+                <X className="w-4 h-4" />
+              </button>
+            </div>
+            {/* Panel content */}
+            <div className="flex-1 overflow-y-auto custom-scrollbar">
+              {rightPanel}
+            </div>
+          </div>
+        </Panel>
+      </Group>
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/StreamingText.tsx b/desktop/src/components/ai/StreamingText.tsx
new file mode 100644
index 0000000..0f820e5
--- /dev/null
+++ b/desktop/src/components/ai/StreamingText.tsx
@@ -0,0 +1,136 @@
+import { useMemo, useRef, useEffect, useState } from 'react';
+import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
+
+/**
+ * Streaming text with word-by-word reveal animation.
+ *
+ * Inspired by DeerFlow's Streamdown library:
+ * - Splits streaming text into "words" at whitespace and CJK boundaries
+ * - Each word gets a CSS fade-in animation
+ * - Historical messages render statically (no animation overhead)
+ *
+ * For non-streaming content, falls back to react-markdown for full
+ * markdown rendering including GFM tables, strikethrough, etc.
+ */
+
+interface StreamingTextProps {
+  content: string;
+  isStreaming: boolean;
+  className?: string;
+  /** Render as markdown for completed messages */
+  asMarkdown?: boolean;
+}
+
+// Split text into words at whitespace and CJK character boundaries
+function splitIntoTokens(text: string): string[] {
+  const tokens: string[] = [];
+  let current = '';
+
+  for (const char of text) {
+    const code = char.codePointAt(0);
+    const isCJK = code && (
+      (code >= 0x4E00 && code <= 0x9FFF) ||   // CJK Unified Ideographs
+      (code >= 0x3400 && code <= 0x4DBF) ||   // CJK Extension A
+      (code >= 0x3000 && code <= 0x303F) ||   // CJK Symbols and Punctuation
+      (code >= 0xFF00 && code <= 0xFFEF) ||   // Fullwidth Forms
+      (code >= 0x2E80 && code <= 0x2EFF) ||   // CJK Radicals Supplement
+      (code >= 0xF900 && code <= 0xFAFF)       // CJK Compatibility Ideographs
+    );
+    const isWhitespace = /\s/.test(char);
+
+    if (isCJK) {
+      // CJK chars are individual tokens
+      if (current) {
+        tokens.push(current);
+        current = '';
+      }
+      tokens.push(char);
+    } else if (isWhitespace) {
+      current += char;
+    } else {
+      current += char;
+    }
+  }
+
+  if (current) {
+    tokens.push(current);
+  }
+
+  return tokens;
+}
+
+export function StreamingText({
+  content,
+  isStreaming,
+  className = '',
+  asMarkdown = true,
+}: StreamingTextProps) {
+  // For completed messages, use full markdown rendering
+  if (!isStreaming && asMarkdown) {
+    return (
+      <div className={`prose-sm prose-gray dark:prose-invert max-w-none ${className}`}>
+        <ReactMarkdown remarkPlugins={[remarkGfm]}>
+          {content}
+        </ReactMarkdown>
+      </div>
+    );
+  }
+
+  // For streaming messages, use token-by-token animation
+  if (isStreaming && content) {
+    return (
+      <StreamingTokenText content={content} className={className} />
+    );
+  }
+
+  // Empty streaming - show nothing
+  return null;
+}
+
+/**
+ * Token-by-token streaming text with CSS animation.
+ * Each token (word/CJK char) fades in sequentially.
+ */
+function StreamingTokenText({ content, className }: { content: string; className: string }) {
+  const tokens = useMemo(() => splitIntoTokens(content), [content]);
+  const containerRef = useRef<HTMLSpanElement>(null);
+  const [visibleCount, setVisibleCount] = useState(0);
+
+  // Animate tokens appearing
+  useEffect(() => {
+    if (visibleCount >= tokens.length) return;
+
+    const remaining = tokens.length - visibleCount;
+    // Batch reveal: show multiple tokens per frame for fast streaming
+    const batchSize = Math.min(remaining, 3);
+    const timer = requestAnimationFrame(() => {
+      setVisibleCount(prev => Math.min(prev + batchSize, tokens.length));
+    });
+
+    return () => cancelAnimationFrame(timer);
+  }, [tokens.length, visibleCount]);
+
+  // Reset visible count when content changes significantly
+  useEffect(() => {
+    setVisibleCount(tokens.length);
+  }, [tokens.length]);
+
+  return (
+    <span ref={containerRef} className={`whitespace-pre-wrap ${className}`}>
+      {tokens.map((token, i) => (
+        <span
+          key={i}
+          className="streaming-token"
+          style={{
+            opacity: i < visibleCount ? 1 : 0,
+            transition: 'opacity 0.15s ease-in',
+          }}
+        >
+          {token}
+        </span>
+      ))}
+      <span className="inline-block w-1.5 h-4 bg-orange-500 animate-pulse ml-0.5 align-text-bottom rounded-sm" />
+    </span>
+  );
+}
diff --git a/desktop/src/components/ai/SuggestionChips.tsx b/desktop/src/components/ai/SuggestionChips.tsx
new file mode 100644
index 0000000..99fa9ba
--- /dev/null
+++ b/desktop/src/components/ai/SuggestionChips.tsx
@@ -0,0 +1,48 @@
+import { motion } from 'framer-motion';
+
+/**
+ * Follow-up suggestion chips.
+ *
+ * Inspired by DeerFlow's suggestion.tsx:
+ * - Horizontal scrollable chip list
+ * - Click to fill input
+ * - Animated entrance
+ */
+
+interface SuggestionChipsProps {
+  suggestions: string[];
+  onSelect: (text: string) => void;
+  className?: string;
+}
+
+export function SuggestionChips({ suggestions, onSelect, className = '' }: SuggestionChipsProps) {
+  if (suggestions.length === 0) return null;
+
+  return (
+    <div className={`flex flex-wrap gap-2 ${className}`}>
+      {suggestions.map((text, index) => (
+        <motion.button
+          key={index}
+          initial={{ opacity: 0, y: 8 }}
+          animate={{ opacity: 1, y: 0 }}
+          transition={{ delay: index * 0.05, duration: 0.2 }}
+          onClick={() => onSelect(text)}
+          className="
+            px-3 py-1.5 text-xs rounded-full
+            bg-gray-50 dark:bg-gray-800
+            border border-gray-200 dark:border-gray-700
+            text-gray-600 dark:text-gray-400
+            hover:bg-orange-50 dark:hover:bg-orange-900/20
+            hover:text-orange-700 dark:hover:text-orange-300
+            hover:border-orange-300 dark:hover:border-orange-600
+            transition-colors
+            max-w-[280px] truncate
+          "
+          title={text}
+        >
+          {text}
+        </motion.button>
+      ))}
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/TaskProgress.tsx b/desktop/src/components/ai/TaskProgress.tsx
new file mode 100644
index 0000000..77e5e99
--- /dev/null
+++ b/desktop/src/components/ai/TaskProgress.tsx
@@ -0,0 +1,169 @@
+import { useState, createContext, useContext, useCallback, type ReactNode } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+import { ChevronRight, CheckCircle2, XCircle, Loader2, Circle } from 'lucide-react';
+
+// ---------------------------------------------------------------------------
+// TaskContext — shared task state for sub-agent orchestration
+// ---------------------------------------------------------------------------
+
+interface TaskContextValue {
+  tasks: Subtask[];
+  updateTask: (id: string, updates: Partial<Subtask>) => void;
+}
+
+const TaskContext = createContext<TaskContextValue | null>(null);
+
+export function useTaskContext() {
+  const ctx = useContext(TaskContext);
+  if (!ctx) {
+    throw new Error('useTaskContext must be used within TaskProvider');
+  }
+  return ctx;
+}
+
+export function TaskProvider({
+  children,
+  initialTasks = [],
+}: {
+  children: ReactNode;
+  initialTasks?: Subtask[];
+}) {
+  const [tasks, setTasks] = useState<Subtask[]>(initialTasks);
+
+  const updateTask = useCallback((id: string, updates: Partial<Subtask>) => {
+    setTasks(prev => prev.map(t => (t.id === id ? { ...t, ...updates } : t)));
+  }, []);
+
+  return (
+    <TaskContext.Provider value={{ tasks, updateTask }}>
+      {children}
+    </TaskContext.Provider>
+  );
+}
+
+/**
+ * Subtask progress display for sub-agent orchestration.
+ *
+ * Inspired by DeerFlow's SubtaskCard + ShineBorder pattern:
+ * - Shows task status with animated indicators
+ * - Collapsible details with thinking chain
+ * - Pulsing border animation for active tasks
+ * - Status icons: running (pulse), completed (green), failed (red)
+ */
+
+export interface Subtask {
+  id: string;
+  description: string;
+  status: 'pending' | 'in_progress' | 'completed' | 'failed';
+  result?: string;
+  error?: string;
+  steps?: Array<{ content: string; status: 'thinking' | 'done' | 'error' }>;
+}
+
+interface TaskProgressProps {
+  tasks: Subtask[];
+  className?: string;
+}
+
+export function TaskProgress({ tasks, className = '' }: TaskProgressProps) {
+  if (tasks.length === 0) return null;
+
+  return (
+    <div className={`space-y-2 ${className}`}>
+      {tasks.map(task => (
+        <SubtaskCard key={task.id} task={task} />
+      ))}
+    </div>
+  );
+}
+
+function SubtaskCard({ task }: { task: Subtask }) {
+  const [expanded, setExpanded] = useState(task.status === 'in_progress');
+  const isActive = task.status === 'in_progress';
+
+  return (
+    <div
+      className={`
+        rounded-lg border transition-all overflow-hidden
+        ${isActive
+          ? 'border-orange-300 dark:border-orange-700 bg-orange-50/50 dark:bg-orange-900/10 shadow-[0_0_15px_-3px_rgba(249,115,22,0.15)] dark:shadow-[0_0_15px_-3px_rgba(249,115,22,0.1)]'
+          : task.status === 'completed'
+            ? 'border-green-200 dark:border-green-800 bg-green-50/30 dark:bg-green-900/10'
+            : task.status === 'failed'
+              ? 'border-red-200 dark:border-red-800 bg-red-50/30 dark:bg-red-900/10'
+              : 'border-gray-200 dark:border-gray-700 bg-gray-50/50 dark:bg-gray-800/50'
+        }
+      `}
+    >
+      {/* Header */}
+      <button
+        onClick={() => setExpanded(!expanded)}
+        className="w-full flex items-center gap-2 px-3 py-2 text-left"
+      >
+        <motion.span animate={{ rotate: expanded ? 90 : 0 }} transition={{ duration: 0.15 }}>
+          <ChevronRight className="w-3.5 h-3.5 text-gray-400" />
+        </motion.span>
+
+        {/* Status icon */}
+        {task.status === 'in_progress' ? (
+          <Loader2 className="w-4 h-4 text-orange-500 animate-spin" />
+        ) : task.status === 'completed' ? (
+          <CheckCircle2 className="w-4 h-4 text-green-500" />
+        ) : task.status === 'failed' ? (
+          <XCircle className="w-4 h-4 text-red-500" />
+        ) : (
+          <Circle className="w-4 h-4 text-gray-400" />
+        )}
+
+        <span className="flex-1 text-xs font-medium text-gray-700 dark:text-gray-300 truncate">
+          {task.description}
+        </span>
+      </button>
+
+      {/* Expanded details */}
+      <AnimatePresence>
+        {expanded && (task.result || task.error || (task.steps && task.steps.length > 0)) && (
+          <motion.div
+            initial={{ height: 0, opacity: 0 }}
+            animate={{ height: 'auto', opacity: 1 }}
+            exit={{ height: 0, opacity: 0 }}
+            transition={{ duration: 0.2 }}
+            className="overflow-hidden"
+          >
+            <div className="px-3 pb-2 ml-6 border-l-2 border-gray-200 dark:border-gray-700 space-y-1">
+              {/* Steps */}
+              {task.steps?.map((step, i) => (
+                <div key={i} className="flex items-start gap-2">
+                  {step.status === 'thinking' ? (
+                    <span className="w-1.5 h-1.5 mt-1.5 bg-amber-400 rounded-full animate-pulse flex-shrink-0" />
+                  ) : step.status === 'done' ? (
+                    <span className="w-1.5 h-1.5 mt-1.5 bg-green-500 rounded-full flex-shrink-0" />
+                  ) : (
+                    <span className="w-1.5 h-1.5 mt-1.5 bg-red-500 rounded-full flex-shrink-0" />
+                  )}
+                  <span className="text-[11px] text-gray-600 dark:text-gray-400 leading-relaxed">
+                    {step.content}
+                  </span>
+                </div>
+              ))}
+
+              {/* Result */}
+              {task.result && (
+                <div className="text-xs text-gray-700 dark:text-gray-300 mt-1 whitespace-pre-wrap">
+                  {task.result}
+                </div>
+              )}
+
+              {/* Error */}
+              {task.error && (
+                <div className="text-xs text-red-600 dark:text-red-400 mt-1">
+                  {task.error}
+                </div>
+              )}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/TokenMeter.tsx b/desktop/src/components/ai/TokenMeter.tsx
new file mode 100644
index 0000000..a9bae5f
--- /dev/null
+++ b/desktop/src/components/ai/TokenMeter.tsx
@@ -0,0 +1,121 @@
+import { useState } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+
+// ---------------------------------------------------------------------------
+// TokenMeter — circular SVG gauge showing token usage
+// Inspired by DeerFlow's token usage display
+// ---------------------------------------------------------------------------
+
+interface TokenMeterProps {
+  inputTokens: number;
+  outputTokens: number;
+  model?: string;
+  className?: string;
+}
+
+// Color thresholds
+function getUsageColor(percent: number): string {
+  if (percent >= 80) return '#ef4444'; // red
+  if (percent >= 50) return '#eab308'; // yellow
+  return '#22c55e'; // green
+}
+
+// Format token count for display
+function formatTokens(n: number): string {
+  if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(1)}M`;
+  if (n >= 1_000) return `${(n / 1_000).toFixed(1)}K`;
+  return String(n);
+}
+
+export function TokenMeter({ inputTokens, outputTokens, model, className = '' }: TokenMeterProps) {
+  const [showDetail, setShowDetail] = useState(false);
+  const total = inputTokens + outputTokens;
+  // Assume ~128K context window as budget for percentage calculation
+  const budget = 128_000;
+  const percent = Math.min(100, (total / budget) * 100);
+  const color = getUsageColor(percent);
+
+  // SVG circular gauge parameters
+  const size = 28;
+  const strokeWidth = 3;
+  const radius = (size - strokeWidth) / 2;
+  const circumference = 2 * Math.PI * radius;
+  const offset = circumference - (percent / 100) * circumference;
+
+  if (total === 0) return null;
+
+  return (
+    <div className={`relative ${className}`}>
+      <button
+        onClick={() => setShowDetail(!showDetail)}
+        onMouseEnter={() => setShowDetail(true)}
+        onMouseLeave={() => setShowDetail(false)}
+        className="focus:outline-none"
+        title="Token 用量"
+      >
+        <svg width={size} height={size} className="transform -rotate-90">
+          {/* Background circle */}
+          <circle
+            cx={size / 2}
+            cy={size / 2}
+            r={radius}
+            fill="none"
+            stroke="currentColor"
+            strokeWidth={strokeWidth}
+            className="text-gray-200 dark:text-gray-700"
+          />
+          {/* Usage arc */}
+          <circle
+            cx={size / 2}
+            cy={size / 2}
+            r={radius}
+            fill="none"
+            stroke={color}
+            strokeWidth={strokeWidth}
+            strokeDasharray={circumference}
+            strokeDashoffset={offset}
+            strokeLinecap="round"
+            className="transition-all duration-500"
+          />
+        </svg>
+        {/* Center text */}
+        <span className="absolute inset-0 flex items-center justify-center text-[9px] font-medium text-gray-500 dark:text-gray-400">
+          {percent >= 1 ? `${Math.round(percent)}` : '<1'}
+        </span>
+      </button>
+
+      {/* Hover detail card */}
+      <AnimatePresence>
+        {showDetail && (
+          <motion.div
+            initial={{ opacity: 0, y: 4, scale: 0.95 }}
+            animate={{ opacity: 1, y: 0, scale: 1 }}
+            exit={{ opacity: 0, y: 4, scale: 0.95 }}
+            transition={{ duration: 0.15 }}
+            className="absolute bottom-full right-0 mb-2 w-44 p-3 rounded-lg bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 shadow-lg z-50"
+          >
+            <div className="space-y-2">
+              <div className="flex items-center justify-between">
+                <span className="text-[11px] text-gray-500 dark:text-gray-400">Input</span>
+                <span className="text-[11px] font-medium text-gray-700 dark:text-gray-200">{formatTokens(inputTokens)}</span>
+              </div>
+              <div className="flex items-center justify-between">
+                <span className="text-[11px] text-gray-500 dark:text-gray-400">Output</span>
+                <span className="text-[11px] font-medium text-gray-700 dark:text-gray-200">{formatTokens(outputTokens)}</span>
+              </div>
+              <div className="border-t border-gray-100 dark:border-gray-700 pt-1.5 flex items-center justify-between">
+                <span className="text-[11px] text-gray-500 dark:text-gray-400">Total</span>
+                <span className="text-[11px] font-bold text-gray-800 dark:text-gray-100">{formatTokens(total)}</span>
+              </div>
+              {model && (
+                <div className="border-t border-gray-100 dark:border-gray-700 pt-1.5">
+                  <span className="text-[10px] text-gray-400 dark:text-gray-500 truncate block">{model}</span>
+                </div>
+              )}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/ToolCallChain.tsx b/desktop/src/components/ai/ToolCallChain.tsx
new file mode 100644
index 0000000..c3dcadd
--- /dev/null
+++ b/desktop/src/components/ai/ToolCallChain.tsx
@@ -0,0 +1,255 @@
+import { useState } from 'react';
+import { motion, AnimatePresence } from 'framer-motion';
+import {
+  Search,
+  Globe,
+  Terminal,
+  FileText,
+  FilePlus,
+  FolderOpen,
+  FileEdit,
+  HelpCircle,
+  Code2,
+  Wrench,
+  ChevronDown,
+  Loader2,
+  CheckCircle2,
+  XCircle,
+} from 'lucide-react';
+
+// ---------------------------------------------------------------------------
+// Types
+// ---------------------------------------------------------------------------
+
+export interface ToolCallStep {
+  id: string;
+  toolName: string;
+  input?: string;
+  output?: string;
+  status: 'running' | 'completed' | 'error';
+  timestamp: Date;
+}
+
+interface ToolCallChainProps {
+  steps: ToolCallStep[];
+  isStreaming?: boolean;
+  className?: string;
+}
+
+// ---------------------------------------------------------------------------
+// Icon mapping — each tool type gets a distinctive icon
+// ---------------------------------------------------------------------------
+
+const TOOL_ICONS: Record<string, typeof Search> = {
+  web_search: Search,
+  web_fetch: Globe,
+  bash: Terminal,
+  read_file: FileText,
+  write_file: FilePlus,
+  ls: FolderOpen,
+  str_replace: FileEdit,
+  ask_clarification: HelpCircle,
+  code_execute: Code2,
+  // Default fallback
+};
+
+const TOOL_LABELS: Record<string, string> = {
+  web_search: '搜索',
+  web_fetch: '获取网页',
+  bash: '执行命令',
+  read_file: '读取文件',
+  write_file: '写入文件',
+  ls: '列出目录',
+  str_replace: '编辑文件',
+  ask_clarification: '澄清问题',
+  code_execute: '执行代码',
+};
+
+function getToolIcon(toolName: string): typeof Search {
+  const lower = toolName.toLowerCase();
+  for (const [key, icon] of Object.entries(TOOL_ICONS)) {
+    if (lower.includes(key)) return icon;
+  }
+  return Wrench;
+}
+
+function getToolLabel(toolName: string): string {
+  const lower = toolName.toLowerCase();
+  for (const [key, label] of Object.entries(TOOL_LABELS)) {
+    if (lower.includes(key)) return label;
+  }
+  return toolName;
+}
+
+// ---------------------------------------------------------------------------
+// Truncate helper
+// ---------------------------------------------------------------------------
+
+function truncate(str: string, maxLen: number): string {
+  if (!str) return '';
+  const oneLine = str.replace(/\n/g, ' ').trim();
+  return oneLine.length > maxLen ? oneLine.slice(0, maxLen) + '...' : oneLine;
+}
+
+// ---------------------------------------------------------------------------
+// ToolCallChain — main component
+// ---------------------------------------------------------------------------
+
+/**
+ * Collapsible tool-call step chain.
+ *
+ * Inspired by DeerFlow's message-group.tsx convertToSteps():
+ * - Each tool call shows a type-specific icon + label
+ * - The latest 2 steps are expanded by default
+ * - Earlier steps collapse into "查看其他 N 个步骤"
+ * - Running steps show a spinner; completed show a checkmark
+ */
+
+const DEFAULT_EXPANDED_COUNT = 2;
+
+export function ToolCallChain({ steps, isStreaming = false, className = '' }: ToolCallChainProps) {
+  const [showAll, setShowAll] = useState(false);
+
+  if (steps.length === 0) return null;
+
+  const visibleSteps = showAll
+    ? steps
+    : steps.slice(-DEFAULT_EXPANDED_COUNT);
+
+  const hiddenCount = steps.length - visibleSteps.length;
+
+  // The last step is "active" during streaming
+  const activeStepIdx = isStreaming ? steps.length - 1 : -1;
+
+  return (
+    <div className={`my-1.5 ${className}`}>
+      {/* Collapsed indicator */}
+      {hiddenCount > 0 && !showAll && (
+        <button
+          onClick={() => setShowAll(true)}
+          className="flex items-center gap-1.5 text-xs text-gray-400 dark:text-gray-500 hover:text-orange-500 dark:hover:text-orange-400 transition-colors mb-1.5 ml-0.5 group"
+        >
+          <ChevronDown className="w-3 h-3 group-hover:text-orange-500 dark:group-hover:text-orange-400 transition-transform" />
+          <span>查看其他 {hiddenCount} 个步骤</span>
+        </button>
+      )}
+
+      {/* Steps list */}
+      <div className="space-y-0.5">
+        {visibleSteps.map((step, idx) => {
+          const globalIdx = showAll ? idx : hiddenCount + idx;
+          const isActive = globalIdx === activeStepIdx;
+          const isLast = globalIdx === steps.length - 1;
+
+          return (
+            <ToolStepRow
+              key={step.id}
+              step={step}
+              isActive={isActive}
+              showConnector={!isLast}
+            />
+          );
+        })}
+      </div>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// ToolStepRow — a single step in the chain
+// ---------------------------------------------------------------------------
+
+interface ToolStepRowProps {
+  step: ToolCallStep;
+  isActive: boolean;
+  showConnector: boolean;
+}
+
+function ToolStepRow({ step, isActive, showConnector }: ToolStepRowProps) {
+  const [expanded, setExpanded] = useState(false);
+  const Icon = getToolIcon(step.toolName);
+  const label = getToolLabel(step.toolName);
+  const isRunning = step.status === 'running';
+  const isError = step.status === 'error';
+
+  return (
+    <div>
+      <button
+        onClick={() => setExpanded(!expanded)}
+        className={`
+          flex items-center gap-2 w-full text-left px-2 py-1 rounded-md transition-colors
+          ${isActive
+            ? 'bg-orange-50 dark:bg-orange-900/15'
+            : 'hover:bg-gray-50 dark:hover:bg-gray-800/60'
+          }
+        `}
+      >
+        {/* Status indicator */}
+        {isRunning ? (
+          <Loader2 className="w-3.5 h-3.5 text-orange-500 animate-spin flex-shrink-0" />
+        ) : isError ? (
+          <XCircle className="w-3.5 h-3.5 text-red-400 flex-shrink-0" />
+        ) : (
+          <CheckCircle2 className="w-3.5 h-3.5 text-green-400 flex-shrink-0" />
+        )}
+
+        {/* Tool icon */}
+        <Icon className={`w-3.5 h-3.5 flex-shrink-0 ${isActive ? 'text-orange-500' : 'text-gray-400 dark:text-gray-500'}`} />
+
+        {/* Tool label */}
+        <span className={`text-xs font-medium ${isActive ? 'text-orange-600 dark:text-orange-400' : 'text-gray-600 dark:text-gray-400'}`}>
+          {label}
+        </span>
+
+        {/* Input preview */}
+        {step.input && !expanded && (
+          <span className="text-[11px] text-gray-400 dark:text-gray-500 truncate flex-1">
+            {truncate(step.input, 60)}
+          </span>
+        )}
+
+        {/* Expand chevron */}
+        {(step.input || step.output) && (
+          <motion.span
+            animate={{ rotate: expanded ? 180 : 0 }}
+            transition={{ duration: 0.15 }}
+            className="ml-auto flex-shrink-0"
+          >
+            <ChevronDown className="w-3 h-3 text-gray-400" />
+          </motion.span>
+        )}
+      </button>
+
+      {/* Expanded details */}
+      <AnimatePresence>
+        {expanded && (step.input || step.output) && (
+          <motion.div
+            initial={{ height: 0, opacity: 0 }}
+            animate={{ height: 'auto', opacity: 1 }}
+            exit={{ height: 0, opacity: 0 }}
+            transition={{ duration: 0.15 }}
+            className="overflow-hidden"
+          >
+            <div className="ml-9 mr-2 mb-1 space-y-1">
+              {step.input && (
+                <div className="text-[11px] text-gray-500 dark:text-gray-400 bg-gray-50 dark:bg-gray-800/80 rounded px-2 py-1 font-mono overflow-x-auto">
+                  {truncate(step.input, 500)}
+                </div>
+              )}
+              {step.output && (
+                <div className={`text-[11px] font-mono rounded px-2 py-1 overflow-x-auto ${isError ? 'text-red-500 bg-red-50 dark:bg-red-900/10' : 'text-green-600 dark:text-green-400 bg-green-50 dark:bg-green-900/10'}`}>
+                  {truncate(step.output, 500)}
+                </div>
+              )}
+            </div>
+          </motion.div>
+        )}
+      </AnimatePresence>
+
+      {/* Vertical connector */}
+      {showConnector && (
+        <div className="ml-[18px] w-px h-1.5 bg-gray-200 dark:bg-gray-700" />
+      )}
+    </div>
+  );
+}
diff --git a/desktop/src/components/ai/index.ts b/desktop/src/components/ai/index.ts
new file mode 100644
index 0000000..96dcb78
--- /dev/null
+++ b/desktop/src/components/ai/index.ts
@@ -0,0 +1,11 @@
+export { Conversation, ConversationProvider, useConversationContext } from './Conversation';
+export { ReasoningBlock } from './ReasoningBlock';
+export { StreamingText } from './StreamingText';
+export { ChatMode, type ChatModeType, type ChatModeConfig, CHAT_MODES } from './ChatMode';
+export { ModelSelector } from './ModelSelector';
+export { TaskProgress, type Subtask, TaskProvider, useTaskContext } from './TaskProgress';
+export { SuggestionChips } from './SuggestionChips';
+export { ResizableChatLayout } from './ResizableChatLayout';
+export { ToolCallChain, type ToolCallStep } from './ToolCallChain';
+export { ArtifactPanel, type ArtifactFile } from './ArtifactPanel';
+export { TokenMeter } from './TokenMeter';
diff --git a/desktop/src/hooks/index.ts b/desktop/src/hooks/index.ts
index a2f38f6..75c9593 100644
--- a/desktop/src/hooks/index.ts
+++ b/desktop/src/hooks/index.ts
@@ -15,3 +15,5 @@ export type {
   UseAutomationEventsOptions,
 } from './useAutomationEvents';
 
+export { useOptimisticMessages } from './useOptimisticMessages';
+
diff --git a/desktop/src/hooks/useOptimisticMessages.ts b/desktop/src/hooks/useOptimisticMessages.ts
new file mode 100644
index 0000000..46f1840
--- /dev/null
+++ b/desktop/src/hooks/useOptimisticMessages.ts
@@ -0,0 +1,102 @@
+import { useCallback, useRef } from 'react';
+import { useChatStore, type Message } from '../store/chatStore';
+import { createLogger } from '../lib/logger';
+
+const log = createLogger('OptimisticMessages');
+
+/**
+ * Represents a file attached to an optimistic message,
+ * tracking its upload lifecycle. Extends MessageFile with a status field.
+ */
+interface OptimisticFile {
+  name: string;
+  size: number;
+  status: 'uploading' | 'uploaded' | 'error';
+  url?: string;
+}
+
+/**
+ * 3-phase optimistic message merging hook (inspired by DeerFlow useThreadStream).
+ *
+ * Phase 1: Instant local echo -- creates a synthetic user message with `optimistic: true`
+ * Phase 2: Server confirmation -- removes optimistic message when real message arrives
+ * Phase 3: File status transition -- updates file status from uploading -> uploaded | error
+ *
+ * This hook provides standalone utilities for components that need fine-grained
+ * control over optimistic rendering outside the main chat flow.
+ */
+export function useOptimisticMessages() {
+  const optimisticIdCounter = useRef(0);
+
+  const generateOptimisticId = useCallback(() => {
+    optimisticIdCounter.current += 1;
+    return `opt-user-${Date.now()}-${optimisticIdCounter.current}`;
+  }, []);
+
+  /**
+   * Phase 1: Create and insert an optimistic user message into the store.
+   * Returns the optimistic ID for later correlation.
+   */
+  const addOptimistic = useCallback((content: string, files?: File[]) => {
+    const id = generateOptimisticId();
+    const optimisticFiles: OptimisticFile[] | undefined = files?.map(f => ({
+      name: f.name,
+      size: f.size,
+      status: 'uploading' as const,
+    }));
+
+    const optimisticMessage: Message = {
+      id,
+      role: 'user',
+      content,
+      timestamp: new Date(),
+      optimistic: true,
+      // Cast through unknown because OptimisticFile extends MessageFile with status
+      files: optimisticFiles as Message['files'],
+    };
+
+    log.debug('Adding optimistic message', { id, content: content.slice(0, 50) });
+
+    useChatStore.setState(state => ({
+      messages: [...state.messages, optimisticMessage],
+    }));
+
+    return id;
+  }, [generateOptimisticId]);
+
+  /**
+   * Phase 2: Remove an optimistic message when the server confirms
+   * by sending back the real message.
+   */
+  const clearOnConfirm = useCallback((optimisticId: string) => {
+    log.debug('Clearing optimistic message on confirm', { optimisticId });
+
+    useChatStore.setState(state => ({
+      messages: state.messages.filter(m => m.id !== optimisticId),
+    }));
+  }, []);
+
+  /**
+   * Phase 3: Transition file attachment status for an optimistic message.
+   */
+  const updateFileStatus = useCallback((optimisticId: string, status: 'uploaded' | 'error') => {
+    log.debug('Updating file status', { optimisticId, status });
+
+    useChatStore.setState(state => ({
+      messages: state.messages.map(m => {
+        if (m.id === optimisticId && m.files) {
+          return {
+            ...m,
+            files: m.files.map(f => ({
+              ...f,
+              status,
+            })),
+          };
+        }
+        return m;
+      }),
+    }));
+  }, []);
+
+  return { addOptimistic, clearOnConfirm, updateFileStatus };
+}
diff --git a/desktop/src/index.css b/desktop/src/index.css
index 3f863de..18b8a88 100644
--- a/desktop/src/index.css
+++ b/desktop/src/index.css
@@ -1,5 +1,27 @@
 @import "tailwindcss";
 
+/* Aurora gradient animation for welcome title (DeerFlow-inspired) */
+@keyframes gradient-shift {
+  0%, 100% { background-position: 0% 50%; }
+  50% { background-position: 100% 50%; }
+}
+
+.aurora-title {
+  background: linear-gradient(
+    135deg,
+    #f97316 0%,     /* orange-500 */
+    #ef4444 25%,    /* red-500 */
+    #f97316 50%,    /* orange-500 */
+    #fb923c 75%,    /* orange-400 */
+    #f97316 100%    /* orange-500 */
+  );
+  background-size: 200% 200%;
+  -webkit-background-clip: text;
+  background-clip: text;
+  -webkit-text-fill-color: transparent;
+  animation: gradient-shift 4s ease infinite;
+}
+
 :root {
   /* Brand Colors - 中性灰色系 */
   --color-primary: #374151;           /* gray-700 */
@@ -18,8 +40,8 @@
 
   /* Neutral Colors */
   --color-bg: #ffffff;
-  --color-bg-secondary: #f9fafb;
-  --color-border: #e5e7eb;
+  --color-bg-secondary: #faf9f6;
+  --color-border: #e8e6e1;
   --color-text: #111827;
   --color-text-secondary: #6b7280;
   --color-text-muted: #9ca3af;
@@ -50,9 +72,9 @@
 }
 
 .dark {
-  --color-bg: #0f172a;
-  --color-bg-secondary: #1e293b;
-  --color-border: #334155;
+  --color-bg: #0f1117;
+  --color-bg-secondary: #1a1b26;
+  --color-border: #2e303a;
   --color-text: #f1f5f9;
   --color-text-secondary: #94a3b8;
   --color-text-muted: #64748b;
@@ -66,7 +88,7 @@
 
 body {
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
-  background-color: #f9fafb;
+  background-color: #faf9f6;
 }
 
 .custom-scrollbar::-webkit-scrollbar {
@@ -84,6 +106,14 @@ body {
   background: #4b5563;  /* gray-600 */
 }
 
+/* Sidebar warm background — DeerFlow-style */
+.sidebar-bg {
+  background: #f5f4f1;
+}
+:root.dark .sidebar-bg {
+  background: #0f1117;
+}
+
 .chat-bubble-assistant {
   background: white;
   border: 1px solid #e5e7eb;
@@ -111,3 +141,16 @@ body {
   0%, 100% { background-position: 0% 50%; }
   50% { background-position: 100% 50%; }
 }
+
+/* Force remove textarea border — WebView2 / Tailwind v4 preflight override */
+textarea {
+  border: none !important;
+  outline: none !important;
+  box-shadow: none !important;
+}
+textarea:focus,
+textarea:focus-visible {
+  border: none !important;
+  outline: none !important;
+  box-shadow: none !important;
+}
diff --git a/desktop/src/lib/gateway-api-types.ts b/desktop/src/lib/gateway-api-types.ts
new file mode 100644
index 0000000..7c1ac20
--- /dev/null
+++ b/desktop/src/lib/gateway-api-types.ts
@@ -0,0 +1,304 @@
+/**
+ * gateway-api-types.ts - Return type interfaces for Gateway REST API methods
+ *
+ * Provides concrete TypeScript interfaces for every API method
+ * that previously returned Promise<any>. Grouped by domain:
+ *   - Health / Status
+ *   - Agents (Clones)
+ *   - Stats & Workspace
+ *   - Quick Config
+ *   - Skills
+ *   - Channels
+ *   - Scheduler
+ *   - Config apply
+ *   - Hands (detail)
+ *   - Session (detail)
+ *   - Trigger (detail)
+ */
+
+// === Health / Status ===
+
+export interface HealthResponse {
+  status: string;
+  version?: string;
+  uptime?: number;
+}
+
+export interface StatusResponse {
+  initialized?: boolean;
+  version?: string;
+  agents_count?: number;
+  sessions_count?: number;
+  uptime?: number;
+  [key: string]: unknown;
+}
+
+// === Agents (Clones) ===
+
+export interface AgentClone {
+  id: string;
+  name?: string;
+  state?: string;
+  model?: string;
+  role?: string;
+  emoji?: string;
+  personality?: string;
+  scenarios?: string[];
+  workspace_dir?: string;
+  created_at?: string;
+  updated_at?: string;
+  [key: string]: unknown;
+}
+
+export interface ListClonesResponse {
+  agents?: AgentClone[];
+  clones?: AgentClone[];
+}
+
+export interface CreateCloneResponse {
+  clone?: AgentClone;
+  agent?: AgentClone;
+}
+
+export interface UpdateCloneResponse {
+  clone?: AgentClone;
+  agent?: AgentClone;
+}
+
+export interface DeleteCloneResponse {
+  status?: string;
+  [key: string]: unknown;
+}
+
+// === Stats & Workspace ===
+
+export interface UsageStatsResponse {
+  totalMessages?: number;
+  totalTokens?: number;
+  sessionsCount?: number;
+  agentsCount?: number;
+  // Fallback compatibility fields
+  totalSessions?: number;
+  byModel?: Record<string, { messages: number; inputTokens: number; outputTokens: number }>;
+}
+
+export interface SessionStatsResponse {
+  sessions?: Array<{
+    id: string;
+    agent_id?: string;
+    message_count?: number;
+    created_at?: string;
+  }>;
+}
+
+export interface WorkspaceInfoResponse {
+  rootDir?: string | null;
+  skillsDir?: string | null;
+  handsDir?: string | null;
+  configDir?: string | null;
+  path?: string;
+  resolvedPath?: string;
+  exists?: boolean;
+  fileCount?: number;
+  totalSize?: number;
+}
+
+export interface PluginEntry {
+  id: string;
+  name?: string;
+  status?: string;
+  version?: string;
+}
+
+export interface PluginStatusResponse {
+  plugins?: PluginEntry[];
+  loaded?: number;
+  total?: number;
+}
+
+// === Quick Config ===
+
+export interface QuickConfigData {
+  agentName?: string;
+  agentRole?: string;
+  userName?: string;
+  userRole?: string;
+  agentNickname?: string;
+  scenarios?: string[];
+  workspaceDir?: string;
+  gatewayUrl?: string;
+  gatewayToken?: string;
+  defaultModel?: string;
+  defaultProvider?: string;
+  theme?: 'light' | 'dark';
+  autoStart?: boolean;
+  showToolCalls?: boolean;
+  autoSaveContext?: boolean;
+  fileWatching?: boolean;
+  privacyOptIn?: boolean;
+  skillsExtraDirs?: string[];
+  mcpServices?: Array<{ id: string; name: string; enabled: boolean }>;
+  restrictFiles?: boolean;
+  [key: string]: unknown;
+}
+
+export interface QuickConfigResponse {
+  quickConfig?: QuickConfigData;
+}
+
+export interface SaveQuickConfigResponse {
+  quickConfig?: QuickConfigData;
+}
+
+// === Skills ===
+
+export interface SkillInfo {
+  id: string;
+  name: string;
+  description?: string;
+  version?: string;
+  capabilities?: string[];
+  tags?: string[];
+  mode?: string;
+  triggers?: Array<{ type: string; pattern?: string }>;
+  actions?: Array<{ type: string; params?: Record<string, unknown> }>;
+  enabled?: boolean;
+  category?: string;
+}
+
+export interface ListSkillsResponse {
+  skills?: SkillInfo[];
+  extraDirs?: string[];
+}
+
+export interface GetSkillResponse {
+  skill?: SkillInfo;
+}
+
+export interface CreateSkillResponse {
+  skill?: SkillInfo;
+}
+
+export interface UpdateSkillResponse {
+  skill?: SkillInfo;
+}
+
+export interface DeleteSkillResponse {
+  status?: string;
+}
+
+// === Channels ===
+
+export interface ChannelInfo {
+  id: string;
+  type: string;
+  name: string;
+  config?: Record<string, unknown>;
+  enabled?: boolean;
+  label?: string;
+  status?: string;
+}
+
+export interface ListChannelsResponse {
+  channels?: ChannelInfo[];
+}
+
+export interface GetChannelResponse {
+  channel?: ChannelInfo;
+}
+
+export interface CreateChannelResponse {
+  channel?: ChannelInfo;
+}
+
+export interface UpdateChannelResponse {
+  channel?: ChannelInfo;
+}
+
+export interface DeleteChannelResponse {
+  status?: string;
+}
+
+export interface FeishuStatusResponse {
+  configured?: boolean;
+  accounts?: number;
+  status?: string;
+}
+
+// === Scheduler ===
+
+export interface ScheduledTaskEntry {
+  id: string;
+  name: string;
+  schedule: string;
+  scheduleType?: 'cron' | 'interval' | 'once';
+  status?: string;
+  target?: { type: 'agent' | 'hand' | 'workflow'; id: string };
+  description?: string;
+  enabled?: boolean;
+}
+
+export interface ListScheduledTasksResponse {
+  tasks?: ScheduledTaskEntry[];
+  total?: number;
+}
+
+// === Config Apply ===
+
+export interface ApplyConfigResponse {
+  ok?: boolean;
+  applied?: boolean;
+  hash?: string;
+  restartScheduled?: boolean;
+}
+
+// === Hands (detail) ===
+
+export interface HandDetail {
+  id?: string;
+  name?: string;
+  description?: string;
+  status?: string;
+  requirements_met?: boolean;
+  category?: string;
+  icon?: string;
+  provider?: string;
+  model?: string;
+  requirements?: Array<{
+    description?: string;
+    name?: string;
+    met?: boolean;
+    satisfied?: boolean;
+    details?: string;
+    hint?: string;
+  }>;
+  tools?: string[];
+  metrics?: string[];
+  config?: Record<string, unknown>;
+  tool_count?: number;
+  metric_count?: number;
+  [key: string]: unknown;
+}
+
+// === Session detail ===
+
+export interface SessionDetail {
+  id: string;
+  agent_id: string;
+  created_at: string;
+  updated_at?: string;
+  message_count?: number;
+  status?: 'active' | 'archived' | 'expired';
+  metadata?: Record<string, unknown>;
+  [key: string]: unknown;
+}
+
+// === Trigger detail ===
+
+export interface TriggerDetail {
+  id: string;
+  type: string;
+  name?: string;
+  enabled: boolean;
+  config?: Record<string, unknown>;
+}
diff --git a/desktop/src/lib/gateway-client.ts b/desktop/src/lib/gateway-client.ts
index b107138..372e47b 100644
--- a/desktop/src/lib/gateway-client.ts
+++ b/desktop/src/lib/gateway-client.ts
@@ -473,6 +473,9 @@ export class GatewayClient {
     opts?: {
       sessionKey?: string;
       agentId?: string;
+      thinking_enabled?: boolean;
+      reasoning_effort?: string;
+      plan_mode?: boolean;
     }
   ): Promise<{ runId: string }> {
     const agentId = opts?.agentId || this.defaultAgentId;
@@ -482,11 +485,16 @@ export class GatewayClient {
     // If no agent ID, try to fetch from ZCLAW status (async, but we'll handle it in connectZclawStream)
     if (!agentId) {
       // Try to get default agent asynchronously
+      const chatModeOpts = {
+        thinking_enabled: opts?.thinking_enabled,
+        reasoning_effort: opts?.reasoning_effort,
+        plan_mode: opts?.plan_mode,
+      };
       this.fetchDefaultAgentId().then(() => {
         const resolvedAgentId = this.defaultAgentId;
         if (resolvedAgentId) {
           this.streamCallbacks.set(runId, callbacks);
-          this.connectZclawStream(resolvedAgentId, runId, sessionId, message);
+          this.connectZclawStream(resolvedAgentId, runId, sessionId, message, chatModeOpts);
         } else {
           callbacks.onError('No agent available. Please ensure ZCLAW has at least one agent.');
           callbacks.onComplete();
@@ -502,7 +510,11 @@ export class GatewayClient {
     this.streamCallbacks.set(runId, callbacks);
 
     // Connect to ZCLAW WebSocket if not connected
-    this.connectZclawStream(agentId, runId, sessionId, message);
+    this.connectZclawStream(agentId, runId, sessionId, message, {
+      thinking_enabled: opts?.thinking_enabled,
+      reasoning_effort: opts?.reasoning_effort,
+      plan_mode: opts?.plan_mode,
+    });
 
     return { runId };
   }
@@ -512,7 +524,12 @@ export class GatewayClient {
     agentId: string,
     runId: string,
     sessionId: string,
-    message: string
+    message: string,
+    chatModeOpts?: {
+      thinking_enabled?: boolean;
+      reasoning_effort?: string;
+      plan_mode?: boolean;
+    }
   ): void {
     // Close existing connection if any
     if (this.zclawWs && this.zclawWs.readyState !== WebSocket.CLOSED) {
@@ -539,11 +556,20 @@ export class GatewayClient {
       this.zclawWs.onopen = () => {
         this.log('info', 'ZCLAW WebSocket connected');
         // Send chat message using ZCLAW actual protocol
-        const chatRequest = {
+        const chatRequest: Record<string, unknown> = {
           type: 'message',
           content: message,
           session_id: sessionId,
         };
+        if (chatModeOpts?.thinking_enabled !== undefined) {
+          chatRequest.thinking_enabled = chatModeOpts.thinking_enabled;
+        }
+        if (chatModeOpts?.reasoning_effort !== undefined) {
+          chatRequest.reasoning_effort = chatModeOpts.reasoning_effort;
+        }
+        if (chatModeOpts?.plan_mode !== undefined) {
+          chatRequest.plan_mode = chatModeOpts.plan_mode;
+        }
         this.zclawWs?.send(JSON.stringify(chatRequest));
       };
 
@@ -569,8 +595,13 @@ export class GatewayClient {
       this.zclawWs.onclose = (event) => {
         this.log('info', `ZCLAW WebSocket closed: ${event.code} ${event.reason}`);
         const callbacks = this.streamCallbacks.get(runId);
-        if (callbacks && event.code !== 1000) {
-          callbacks.onError(`Connection closed: ${event.reason || 'unknown'}`);
+        if (callbacks) {
+          if (event.code !== 1000) {
+            callbacks.onError(`Connection closed: ${event.reason || 'unknown'}`);
+          } else {
+            // Normal closure — ensure stream is completed even if no done event was sent
+            callbacks.onComplete();
+          }
         }
         this.streamCallbacks.delete(runId);
         this.zclawWs = null;
@@ -614,8 +645,9 @@ export class GatewayClient {
       case 'response':
         // Final response with tokens info
         if (data.content) {
-          // If we haven't received any deltas yet, send the full response
-          // This handles non-streaming responses
+          // Forward the full response content via onDelta
+          // This handles non-streaming responses from the server
+          callbacks.onDelta(data.content);
         }
         // Mark complete if phase done wasn't sent
         callbacks.onComplete();
diff --git a/desktop/src/lib/gateway-stream.ts b/desktop/src/lib/gateway-stream.ts
deleted file mode 100644
index c55efb0..0000000
--- a/desktop/src/lib/gateway-stream.ts
+++ /dev/null
@@ -1,288 +0,0 @@
-/**
- * gateway-stream.ts - Gateway Stream Methods
- *
- * Extracted from gateway-client.ts for modularity.
- * Installs streaming methods onto GatewayClient.prototype via mixin pattern.
- *
- * Contains:
- * - chatStream (public): Send message with streaming response
- * - connectZclawStream (private): Connect to ZCLAW WebSocket for streaming
- * - handleZclawStreamEvent (private): Parse and dispatch stream events
- * - cancelStream (public): Cancel an ongoing stream
- */
-
-import type { ZclawStreamEvent } from './gateway-types';
-import type { GatewayClient } from './gateway-client';
-import { createIdempotencyKey } from './gateway-errors';
-
-// === Mixin Installer ===
-
-/**
- * Install streaming methods onto GatewayClient.prototype.
- *
- * These methods access instance properties:
- * - this.defaultAgentId: string
- * - this.zclawWs: WebSocket | null
- * - this.streamCallbacks: Map<string, StreamCallbacks>
- * - this.log(level, message): void
- * - this.getRestBaseUrl(): string
- * - this.fetchDefaultAgentId(): Promise<string | null>
- * - this.emitEvent(event, payload): void
- */
-export function installStreamMethods(ClientClass: { prototype: GatewayClient }): void {
-  const proto = ClientClass.prototype as any;
-
-  /**
-   * Send message with streaming response (ZCLAW WebSocket).
-   */
-  proto.chatStream = async function (
-    this: GatewayClient,
-    message: string,
-    callbacks: {
-      onDelta: (delta: string) => void;
-      onTool?: (tool: string, input: string, output: string) => void;
-      onHand?: (name: string, status: string, result?: unknown) => void;
-      onComplete: () => void;
-      onError: (error: string) => void;
-    },
-    opts?: {
-      sessionKey?: string;
-      agentId?: string;
-    }
-  ): Promise<{ runId: string }> {
-    const self = this as any;
-    const agentId = opts?.agentId || self.defaultAgentId;
-    const runId = createIdempotencyKey();
-    const sessionId = opts?.sessionKey || crypto.randomUUID();
-
-    // If no agent ID, try to fetch from ZCLAW status (async, but we'll handle it in connectZclawStream)
-    if (!agentId) {
-      // Try to get default agent asynchronously
-      self.fetchDefaultAgentId().then(() => {
-        const resolvedAgentId = self.defaultAgentId;
-        if (resolvedAgentId) {
-          self.streamCallbacks.set(runId, callbacks);
-          self.connectZclawStream(resolvedAgentId, runId, sessionId, message);
-        } else {
-          callbacks.onError('No agent available. Please ensure ZCLAW has at least one agent.');
-          callbacks.onComplete();
-        }
-      }).catch((err: unknown) => {
-        callbacks.onError(`Failed to get agent: ${err}`);
-        callbacks.onComplete();
-      });
-      return { runId };
-    }
-
-    // Store callbacks for this run
-    self.streamCallbacks.set(runId, callbacks);
-
-    // Connect to ZCLAW WebSocket if not connected
-    self.connectZclawStream(agentId, runId, sessionId, message);
-
-    return { runId };
-  };
-
-  /**
-   * Connect to ZCLAW streaming WebSocket.
-   */
-  proto.connectZclawStream = function (
-    this: GatewayClient,
-    agentId: string,
-    runId: string,
-    sessionId: string,
-    message: string
-  ): void {
-    const self = this as any;
-    // Close existing connection if any
-    if (self.zclawWs && self.zclawWs.readyState !== WebSocket.CLOSED) {
-      self.zclawWs.close();
-    }
-
-    // Build WebSocket URL
-    // In dev mode, use Vite proxy; in production, use direct connection
-    let wsUrl: string;
-    if (typeof window !== 'undefined' && window.location.port === '1420') {
-      // Dev mode: use Vite proxy with relative path
-      wsUrl = `ws://${window.location.host}/api/agents/${agentId}/ws`;
-    } else {
-      // Production: extract from stored URL
-      const httpUrl = self.getRestBaseUrl();
-      wsUrl = httpUrl.replace(/^http/, 'ws') + `/api/agents/${agentId}/ws`;
-    }
-
-    self.log('info', `Connecting to ZCLAW stream: ${wsUrl}`);
-
-    try {
-      self.zclawWs = new WebSocket(wsUrl);
-
-      self.zclawWs.onopen = () => {
-        self.log('info', 'ZCLAW WebSocket connected');
-        // Send chat message using ZCLAW actual protocol
-        const chatRequest = {
-          type: 'message',
-          content: message,
-          session_id: sessionId,
-        };
-        self.zclawWs?.send(JSON.stringify(chatRequest));
-      };
-
-      self.zclawWs.onmessage = (event: MessageEvent) => {
-        try {
-          const data = JSON.parse(event.data);
-          self.handleZclawStreamEvent(runId, data, sessionId);
-        } catch (err: unknown) {
-          const errorMessage = err instanceof Error ? err.message : String(err);
-          self.log('error', `Failed to parse stream event: ${errorMessage}`);
-        }
-      };
-
-      self.zclawWs.onerror = (_event: Event) => {
-        self.log('error', 'ZCLAW WebSocket error');
-        const callbacks = self.streamCallbacks.get(runId);
-        if (callbacks) {
-          callbacks.onError('WebSocket connection failed');
-          self.streamCallbacks.delete(runId);
-        }
-      };
-
-      self.zclawWs.onclose = (event: CloseEvent) => {
-        self.log('info', `ZCLAW WebSocket closed: ${event.code} ${event.reason}`);
-        const callbacks = self.streamCallbacks.get(runId);
-        if (callbacks && event.code !== 1000) {
-          callbacks.onError(`Connection closed: ${event.reason || 'unknown'}`);
-        }
-        self.streamCallbacks.delete(runId);
-        self.zclawWs = null;
-      };
-    } catch (err: unknown) {
-      const errorMessage = err instanceof Error ? err.message : String(err);
-      self.log('error', `Failed to create WebSocket: ${errorMessage}`);
-      const callbacks = self.streamCallbacks.get(runId);
-      if (callbacks) {
-        callbacks.onError(errorMessage);
-        self.streamCallbacks.delete(runId);
-      }
-    }
-  };
-
-  /**
-   * Handle ZCLAW stream events.
-   */
-  proto.handleZclawStreamEvent = function (
-    this: GatewayClient,
-    runId: string,
-    data: ZclawStreamEvent,
-    sessionId: string
-  ): void {
-    const self = this as any;
-    const callbacks = self.streamCallbacks.get(runId);
-    if (!callbacks) return;
-
-    switch (data.type) {
-      // ZCLAW actual event types
-      case 'text_delta':
-        // Stream delta content
-        if (data.content) {
-          callbacks.onDelta(data.content);
-        }
-        break;
-
-      case 'phase':
-        // Phase change: streaming | done
-        if (data.phase === 'done') {
-          callbacks.onComplete();
-          self.streamCallbacks.delete(runId);
-          if (self.zclawWs) {
-            self.zclawWs.close(1000, 'Stream complete');
-          }
-        }
-        break;
-
-      case 'response':
-        // Final response with tokens info
-        if (data.content) {
-          // If we haven't received any deltas yet, send the full response
-          // This handles non-streaming responses
-        }
-        // Mark complete if phase done wasn't sent
-        callbacks.onComplete();
-        self.streamCallbacks.delete(runId);
-        if (self.zclawWs) {
-          self.zclawWs.close(1000, 'Stream complete');
-        }
-        break;
-
-      case 'typing':
-        // Typing indicator: { state: 'start' | 'stop' }
-        // Can be used for UI feedback
-        break;
-
-      case 'tool_call':
-        // Tool call event
-        if (callbacks.onTool && data.tool) {
-          callbacks.onTool(data.tool, JSON.stringify(data.input || {}), data.output || '');
-        }
-        break;
-
-      case 'tool_result':
-        if (callbacks.onTool && data.tool) {
-          callbacks.onTool(data.tool, '', String(data.result || data.output || ''));
-        }
-        break;
-
-      case 'hand':
-        if (callbacks.onHand && data.hand_name) {
-          callbacks.onHand(data.hand_name, data.hand_status || 'triggered', data.hand_result);
-        }
-        break;
-
-      case 'error':
-        callbacks.onError(data.message || data.code || data.content || 'Unknown error');
-        self.streamCallbacks.delete(runId);
-        if (self.zclawWs) {
-          self.zclawWs.close(1011, 'Error');
-        }
-        break;
-
-      case 'connected':
-        // Connection established
-        self.log('info', `ZCLAW agent connected: ${data.agent_id}`);
-        break;
-
-      case 'agents_updated':
-        // Agents list updated
-        self.log('debug', 'Agents list updated');
-        break;
-
-      default:
-        // Emit unknown events for debugging
-        self.log('debug', `Stream event: ${data.type}`);
-    }
-
-    // Also emit to general 'agent' event listeners
-    self.emitEvent('agent', {
-      stream: data.type === 'text_delta' ? 'assistant' : data.type,
-      delta: data.content,
-      content: data.content,
-      runId,
-      sessionId,
-      ...data,
-    });
-  };
-
-  /**
-   * Cancel an ongoing stream.
-   */
-  proto.cancelStream = function (this: GatewayClient, runId: string): void {
-    const self = this as any;
-    const callbacks = self.streamCallbacks.get(runId);
-    if (callbacks) {
-      callbacks.onError('Stream cancelled');
-      self.streamCallbacks.delete(runId);
-    }
-    if (self.zclawWs && self.zclawWs.readyState === WebSocket.OPEN) {
-      self.zclawWs.close(1000, 'User cancelled');
-    }
-  };
-}
diff --git a/desktop/src/lib/intelligence-client/fallback-compactor.ts b/desktop/src/lib/intelligence-client/fallback-compactor.ts
new file mode 100644
index 0000000..5d61f58
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/fallback-compactor.ts
@@ -0,0 +1,61 @@
+/**
+ * Intelligence Layer - LocalStorage Compactor Fallback
+ *
+ * Provides rule-based compaction for browser/dev environment.
+ */
+
+import type { CompactableMessage, CompactionResult, CompactionCheck, CompactionConfig } from '../intelligence-backend';
+
+export const fallbackCompactor = {
+  async estimateTokens(text: string): Promise<number> {
+    // Simple heuristic: ~4 chars per token for English, ~1.5 for CJK
+    const cjkChars = (text.match(/[\u4e00-\u9fff\u3040-\u30ff]/g) ?? []).length;
+    const otherChars = text.length - cjkChars;
+    return Math.ceil(cjkChars * 1.5 + otherChars / 4);
+  },
+
+  async estimateMessagesTokens(messages: CompactableMessage[]): Promise<number> {
+    let total = 0;
+    for (const m of messages) {
+      total += await fallbackCompactor.estimateTokens(m.content);
+    }
+    return total;
+  },
+
+  async checkThreshold(
+    messages: CompactableMessage[],
+    config?: CompactionConfig
+  ): Promise<CompactionCheck> {
+    const threshold = config?.soft_threshold_tokens ?? 15000;
+    const currentTokens = await fallbackCompactor.estimateMessagesTokens(messages);
+
+    return {
+      should_compact: currentTokens >= threshold,
+      current_tokens: currentTokens,
+      threshold,
+      urgency: currentTokens >= (config?.hard_threshold_tokens ?? 20000) ? 'hard' :
+               currentTokens >= threshold ? 'soft' : 'none',
+    };
+  },
+
+  async compact(
+    messages: CompactableMessage[],
+    _agentId: string,
+    _conversationId?: string,
+    config?: CompactionConfig
+  ): Promise<CompactionResult> {
+    // Simple rule-based compaction: keep last N messages
+    const keepRecent = config?.keep_recent_messages ?? 10;
+    const retained = messages.slice(-keepRecent);
+
+    return {
+      compacted_messages: retained,
+      summary: `[Compacted ${messages.length - retained.length} earlier messages]`,
+      original_count: messages.length,
+      retained_count: retained.length,
+      flushed_memories: 0,
+      tokens_before_compaction: await fallbackCompactor.estimateMessagesTokens(messages),
+      tokens_after_compaction: await fallbackCompactor.estimateMessagesTokens(retained),
+    };
+  },
+};
diff --git a/desktop/src/lib/intelligence-client/fallback-heartbeat.ts b/desktop/src/lib/intelligence-client/fallback-heartbeat.ts
new file mode 100644
index 0000000..b1912e7
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/fallback-heartbeat.ts
@@ -0,0 +1,54 @@
+/**
+ * Intelligence Layer - LocalStorage Heartbeat Fallback
+ *
+ * Provides no-op heartbeat for browser/dev environment.
+ */
+
+import type { HeartbeatConfig, HeartbeatResult } from '../intelligence-backend';
+
+export const fallbackHeartbeat = {
+  _configs: new Map<string, HeartbeatConfig>(),
+
+  async init(agentId: string, config?: HeartbeatConfig): Promise<void> {
+    if (config) {
+      fallbackHeartbeat._configs.set(agentId, config);
+    }
+  },
+
+  async start(_agentId: string): Promise<void> {
+    // No-op for fallback (no background tasks in browser)
+  },
+
+  async stop(_agentId: string): Promise<void> {
+    // No-op
+  },
+
+  async tick(_agentId: string): Promise<HeartbeatResult> {
+    return {
+      status: 'ok',
+      alerts: [],
+      checked_items: 0,
+      timestamp: new Date().toISOString(),
+    };
+  },
+
+  async getConfig(agentId: string): Promise<HeartbeatConfig> {
+    return fallbackHeartbeat._configs.get(agentId) ?? {
+      enabled: false,
+      interval_minutes: 30,
+      quiet_hours_start: null,
+      quiet_hours_end: null,
+      notify_channel: 'ui',
+      proactivity_level: 'standard',
+      max_alerts_per_tick: 5,
+    };
+  },
+
+  async updateConfig(agentId: string, config: HeartbeatConfig): Promise<void> {
+    fallbackHeartbeat._configs.set(agentId, config);
+  },
+
+  async getHistory(_agentId: string, _limit?: number): Promise<HeartbeatResult[]> {
+    return [];
+  },
+};
diff --git a/desktop/src/lib/intelligence-client/fallback-identity.ts b/desktop/src/lib/intelligence-client/fallback-identity.ts
new file mode 100644
index 0000000..6c9e32a
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/fallback-identity.ts
@@ -0,0 +1,239 @@
+/**
+ * Intelligence Layer - LocalStorage Identity Fallback
+ *
+ * Provides localStorage-based identity management for browser/dev environment.
+ */
+
+import { createLogger } from '../logger';
+
+import type { IdentityFiles, IdentityChangeProposal, IdentitySnapshot } from '../intelligence-backend';
+
+const logger = createLogger('intelligence-client');
+
+const IDENTITY_STORAGE_KEY = 'zclaw-fallback-identities';
+const PROPOSALS_STORAGE_KEY = 'zclaw-fallback-proposals';
+const SNAPSHOTS_STORAGE_KEY = 'zclaw-fallback-snapshots';
+
+function loadIdentitiesFromStorage(): Map<string, IdentityFiles> {
+  try {
+    const stored = localStorage.getItem(IDENTITY_STORAGE_KEY);
+    if (stored) {
+      const parsed = JSON.parse(stored) as Record<string, IdentityFiles>;
+      return new Map(Object.entries(parsed));
+    }
+  } catch (e) {
+    logger.warn('Failed to load identities from localStorage', { error: e });
+  }
+  return new Map();
+}
+
+function saveIdentitiesToStorage(identities: Map<string, IdentityFiles>): void {
+  try {
+    const obj = Object.fromEntries(identities);
+    localStorage.setItem(IDENTITY_STORAGE_KEY, JSON.stringify(obj));
+  } catch (e) {
+    logger.warn('Failed to save identities to localStorage', { error: e });
+  }
+}
+
+function loadProposalsFromStorage(): IdentityChangeProposal[] {
+  try {
+    const stored = localStorage.getItem(PROPOSALS_STORAGE_KEY);
+    if (stored) {
+      return JSON.parse(stored) as IdentityChangeProposal[];
+    }
+  } catch (e) {
+    logger.warn('Failed to load proposals from localStorage', { error: e });
+  }
+  return [];
+}
+
+function saveProposalsToStorage(proposals: IdentityChangeProposal[]): void {
+  try {
+    localStorage.setItem(PROPOSALS_STORAGE_KEY, JSON.stringify(proposals));
+  } catch (e) {
+    logger.warn('Failed to save proposals to localStorage', { error: e });
+  }
+}
+
+function loadSnapshotsFromStorage(): IdentitySnapshot[] {
+  try {
+    const stored = localStorage.getItem(SNAPSHOTS_STORAGE_KEY);
+    if (stored) {
+      return JSON.parse(stored) as IdentitySnapshot[];
+    }
+  } catch (e) {
+    logger.warn('Failed to load snapshots from localStorage', { error: e });
+  }
+  return [];
+}
+
+function saveSnapshotsToStorage(snapshots: IdentitySnapshot[]): void {
+  try {
+    localStorage.setItem(SNAPSHOTS_STORAGE_KEY, JSON.stringify(snapshots));
+  } catch (e) {
+    logger.warn('Failed to save snapshots to localStorage', { error: e });
+  }
+}
+
+// Module-level state initialized from localStorage
+const fallbackIdentities = loadIdentitiesFromStorage();
+const fallbackProposals = loadProposalsFromStorage();
+let fallbackSnapshots = loadSnapshotsFromStorage();
+
+export const fallbackIdentity = {
+  async get(agentId: string): Promise<IdentityFiles> {
+    if (!fallbackIdentities.has(agentId)) {
+      const defaults: IdentityFiles = {
+        soul: '# Agent Soul\n\nA helpful AI assistant.',
+        instructions: '# Instructions\n\nBe helpful and concise.',
+        user_profile: '# User Profile\n\nNo profile yet.',
+      };
+      fallbackIdentities.set(agentId, defaults);
+      saveIdentitiesToStorage(fallbackIdentities);
+    }
+    return fallbackIdentities.get(agentId)!;
+  },
+
+  async getFile(agentId: string, file: string): Promise<string> {
+    const files = await fallbackIdentity.get(agentId);
+    return files[file as keyof IdentityFiles] ?? '';
+  },
+
+  async buildPrompt(agentId: string, memoryContext?: string): Promise<string> {
+    const files = await fallbackIdentity.get(agentId);
+    let prompt = `${files.soul}\n\n## Instructions\n${files.instructions}\n\n## User Profile\n${files.user_profile}`;
+    if (memoryContext) {
+      prompt += `\n\n## Memory Context\n${memoryContext}`;
+    }
+    return prompt;
+  },
+
+  async updateUserProfile(agentId: string, content: string): Promise<void> {
+    const files = await fallbackIdentity.get(agentId);
+    files.user_profile = content;
+    fallbackIdentities.set(agentId, files);
+    saveIdentitiesToStorage(fallbackIdentities);
+  },
+
+  async appendUserProfile(agentId: string, addition: string): Promise<void> {
+    const files = await fallbackIdentity.get(agentId);
+    files.user_profile += `\n\n${addition}`;
+    fallbackIdentities.set(agentId, files);
+    saveIdentitiesToStorage(fallbackIdentities);
+  },
+
+  async proposeChange(
+    agentId: string,
+    file: 'soul' | 'instructions',
+    suggestedContent: string,
+    reason: string
+  ): Promise<IdentityChangeProposal> {
+    const files = await fallbackIdentity.get(agentId);
+    const proposal: IdentityChangeProposal = {
+      id: `prop_${Date.now()}`,
+      agent_id: agentId,
+      file,
+      reason,
+      current_content: files[file] ?? '',
+      suggested_content: suggestedContent,
+      status: 'pending',
+      created_at: new Date().toISOString(),
+    };
+    fallbackProposals.push(proposal);
+    saveProposalsToStorage(fallbackProposals);
+    return proposal;
+  },
+
+  async approveProposal(proposalId: string): Promise<IdentityFiles> {
+    const proposal = fallbackProposals.find(p => p.id === proposalId);
+    if (!proposal) throw new Error('Proposal not found');
+
+    const files = await fallbackIdentity.get(proposal.agent_id);
+
+    // Create snapshot before applying change
+    const snapshot: IdentitySnapshot = {
+      id: `snap_${Date.now()}`,
+      agent_id: proposal.agent_id,
+      files: { ...files },
+      timestamp: new Date().toISOString(),
+      reason: `Before applying: ${proposal.reason}`,
+    };
+    fallbackSnapshots.unshift(snapshot);
+    // Keep only last 20 snapshots per agent
+    const agentSnapshots = fallbackSnapshots.filter(s => s.agent_id === proposal.agent_id);
+    if (agentSnapshots.length > 20) {
+      const toRemove = agentSnapshots.slice(20);
+      fallbackSnapshots = fallbackSnapshots.filter(s => !toRemove.includes(s));
+    }
+    saveSnapshotsToStorage(fallbackSnapshots);
+
+    proposal.status = 'approved';
+    files[proposal.file] = proposal.suggested_content;
+    fallbackIdentities.set(proposal.agent_id, files);
+    saveIdentitiesToStorage(fallbackIdentities);
+    saveProposalsToStorage(fallbackProposals);
+    return files;
+  },
+
+  async rejectProposal(proposalId: string): Promise<void> {
+    const proposal = fallbackProposals.find(p => p.id === proposalId);
+    if (proposal) {
+      proposal.status = 'rejected';
+      saveProposalsToStorage(fallbackProposals);
+    }
+  },
+
+  async getPendingProposals(agentId?: string): Promise<IdentityChangeProposal[]> {
+    return fallbackProposals.filter(p =>
+      p.status === 'pending' && (!agentId || p.agent_id === agentId)
+    );
+  },
+
+  async updateFile(agentId: string, file: string, content: string): Promise<void> {
+    const files = await fallbackIdentity.get(agentId);
+    if (file in files) {
+      // IdentityFiles has known properties, update safely
+      const key = file as keyof IdentityFiles;
+      if (key in files) {
+        files[key] = content;
+        fallbackIdentities.set(agentId, files);
+        saveIdentitiesToStorage(fallbackIdentities);
+      }
+    }
+  },
+
+  async getSnapshots(agentId: string, limit?: number): Promise<IdentitySnapshot[]> {
+    const agentSnapshots = fallbackSnapshots.filter(s => s.agent_id === agentId);
+    return agentSnapshots.slice(0, limit ?? 10);
+  },
+
+  async restoreSnapshot(agentId: string, snapshotId: string): Promise<void> {
+    const snapshot = fallbackSnapshots.find(s => s.id === snapshotId && s.agent_id === agentId);
+    if (!snapshot) throw new Error('Snapshot not found');
+
+    // Create a snapshot of current state before restore
+    const currentFiles = await fallbackIdentity.get(agentId);
+    const beforeRestoreSnapshot: IdentitySnapshot = {
+      id: `snap_${Date.now()}`,
+      agent_id: agentId,
+      files: { ...currentFiles },
+      timestamp: new Date().toISOString(),
+      reason: 'Auto-backup before restore',
+    };
+    fallbackSnapshots.unshift(beforeRestoreSnapshot);
+    saveSnapshotsToStorage(fallbackSnapshots);
+
+    // Restore the snapshot
+    fallbackIdentities.set(agentId, { ...snapshot.files });
+    saveIdentitiesToStorage(fallbackIdentities);
+  },
+
+  async listAgents(): Promise<string[]> {
+    return Array.from(fallbackIdentities.keys());
+  },
+
+  async deleteAgent(agentId: string): Promise<void> {
+    fallbackIdentities.delete(agentId);
+  },
+};
diff --git a/desktop/src/lib/intelligence-client/fallback-memory.ts b/desktop/src/lib/intelligence-client/fallback-memory.ts
new file mode 100644
index 0000000..282e072
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/fallback-memory.ts
@@ -0,0 +1,165 @@
+/**
+ * Intelligence Layer - LocalStorage Memory Fallback
+ *
+ * Provides localStorage-based memory operations for browser/dev environment.
+ */
+
+import { createLogger } from '../logger';
+import { generateRandomString } from '../crypto-utils';
+
+import type { MemoryEntry, MemorySearchOptions, MemoryStats, MemoryType, MemorySource } from './types';
+
+const logger = createLogger('intelligence-client');
+
+import type { MemoryEntryInput } from '../intelligence-backend';
+
+const FALLBACK_STORAGE_KEY = 'zclaw-intelligence-fallback';
+
+interface FallbackMemoryStore {
+  memories: MemoryEntry[];
+}
+
+function getFallbackStore(): FallbackMemoryStore {
+  try {
+    const stored = localStorage.getItem(FALLBACK_STORAGE_KEY);
+    if (stored) {
+      return JSON.parse(stored);
+    }
+  } catch (e) {
+    logger.debug('Failed to read fallback store from localStorage', { error: e });
+  }
+  return { memories: [] };
+}
+
+function saveFallbackStore(store: FallbackMemoryStore): void {
+  try {
+    localStorage.setItem(FALLBACK_STORAGE_KEY, JSON.stringify(store));
+  } catch (e) {
+    logger.warn('Failed to save fallback store to localStorage', { error: e });
+  }
+}
+
+export const fallbackMemory = {
+  async init(): Promise<void> {
+    // No-op for localStorage
+  },
+
+  async store(entry: MemoryEntryInput): Promise<string> {
+    const store = getFallbackStore();
+    const id = `mem_${Date.now()}_${generateRandomString(6)}`;
+    const now = new Date().toISOString();
+
+    const memory: MemoryEntry = {
+      id,
+      agentId: entry.agent_id,
+      content: entry.content,
+      type: entry.memory_type as MemoryType,
+      importance: entry.importance ?? 5,
+      source: (entry.source as MemorySource) ?? 'auto',
+      tags: entry.tags ?? [],
+      createdAt: now,
+      lastAccessedAt: now,
+      accessCount: 0,
+      conversationId: entry.conversation_id,
+    };
+
+    store.memories.push(memory);
+    saveFallbackStore(store);
+    return id;
+  },
+
+  async get(id: string): Promise<MemoryEntry | null> {
+    const store = getFallbackStore();
+    return store.memories.find(m => m.id === id) ?? null;
+  },
+
+  async search(options: MemorySearchOptions): Promise<MemoryEntry[]> {
+    const store = getFallbackStore();
+    let results = store.memories;
+
+    if (options.agentId) {
+      results = results.filter(m => m.agentId === options.agentId);
+    }
+    if (options.type) {
+      results = results.filter(m => m.type === options.type);
+    }
+    if (options.minImportance !== undefined) {
+      results = results.filter(m => m.importance >= options.minImportance!);
+    }
+    if (options.query) {
+      const queryLower = options.query.toLowerCase();
+      results = results.filter(m =>
+        m.content.toLowerCase().includes(queryLower) ||
+        m.tags.some(t => t.toLowerCase().includes(queryLower))
+      );
+    }
+    if (options.limit) {
+      results = results.slice(0, options.limit);
+    }
+
+    return results;
+  },
+
+  async delete(id: string): Promise<void> {
+    const store = getFallbackStore();
+    store.memories = store.memories.filter(m => m.id !== id);
+    saveFallbackStore(store);
+  },
+
+  async deleteAll(agentId: string): Promise<number> {
+    const store = getFallbackStore();
+    const before = store.memories.length;
+    store.memories = store.memories.filter(m => m.agentId !== agentId);
+    saveFallbackStore(store);
+    return before - store.memories.length;
+  },
+
+  async stats(): Promise<MemoryStats> {
+    const store = getFallbackStore();
+    const byType: Record<string, number> = {};
+    const byAgent: Record<string, number> = {};
+
+    for (const m of store.memories) {
+      byType[m.type] = (byType[m.type] ?? 0) + 1;
+      byAgent[m.agentId] = (byAgent[m.agentId] ?? 0) + 1;
+    }
+
+    const sorted = [...store.memories].sort((a, b) =>
+      new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime()
+    );
+
+    // Estimate storage size from serialized data
+    let storageSizeBytes = 0;
+    try {
+      const serialized = JSON.stringify(store.memories);
+      storageSizeBytes = new Blob([serialized]).size;
+    } catch (e) {
+      logger.debug('Failed to estimate storage size', { error: e });
+    }
+
+    return {
+      totalEntries: store.memories.length,
+      byType,
+      byAgent,
+      oldestEntry: sorted[0]?.createdAt ?? null,
+      newestEntry: sorted[sorted.length - 1]?.createdAt ?? null,
+      storageSizeBytes,
+    };
+  },
+
+  async export(): Promise<MemoryEntry[]> {
+    const store = getFallbackStore();
+    return store.memories;
+  },
+
+  async import(memories: MemoryEntry[]): Promise<number> {
+    const store = getFallbackStore();
+    store.memories.push(...memories);
+    saveFallbackStore(store);
+    return memories.length;
+  },
+
+  async dbPath(): Promise<string> {
+    return 'localStorage://zclaw-intelligence-fallback';
+  },
+};
diff --git a/desktop/src/lib/intelligence-client/fallback-reflection.ts b/desktop/src/lib/intelligence-client/fallback-reflection.ts
new file mode 100644
index 0000000..8f789b5
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/fallback-reflection.ts
@@ -0,0 +1,167 @@
+/**
+ * Intelligence Layer - LocalStorage Reflection Fallback
+ *
+ * Provides rule-based reflection for browser/dev environment.
+ */
+
+import type {
+  ReflectionResult,
+  ReflectionState,
+  ReflectionConfig,
+  PatternObservation,
+  ImprovementSuggestion,
+  ReflectionIdentityProposal,
+  MemoryEntryForAnalysis,
+} from '../intelligence-backend';
+
+export const fallbackReflection = {
+  _conversationCount: 0,
+  _lastReflection: null as string | null,
+  _history: [] as ReflectionResult[],
+
+  async init(_config?: ReflectionConfig): Promise<void> {
+    // No-op
+  },
+
+  async recordConversation(): Promise<void> {
+    fallbackReflection._conversationCount++;
+  },
+
+  async shouldReflect(): Promise<boolean> {
+    return fallbackReflection._conversationCount >= 5;
+  },
+
+  async reflect(agentId: string, memories: MemoryEntryForAnalysis[]): Promise<ReflectionResult> {
+    fallbackReflection._conversationCount = 0;
+    fallbackReflection._lastReflection = new Date().toISOString();
+
+    // Analyze patterns (simple rule-based implementation)
+    const patterns: PatternObservation[] = [];
+    const improvements: ImprovementSuggestion[] = [];
+    const identityProposals: ReflectionIdentityProposal[] = [];
+
+    // Count memory types
+    const typeCounts: Record<string, number> = {};
+    for (const m of memories) {
+      typeCounts[m.memory_type] = (typeCounts[m.memory_type] || 0) + 1;
+    }
+
+    // Pattern: Too many tasks
+    const taskCount = typeCounts['task'] || 0;
+    if (taskCount >= 5) {
+      const taskMemories = memories.filter(m => m.memory_type === 'task').slice(0, 3);
+      patterns.push({
+        observation: `积累了 ${taskCount} 个待办任务，可能存在任务管理不善`,
+        frequency: taskCount,
+        sentiment: 'negative',
+        evidence: taskMemories.map(m => m.content),
+      });
+      improvements.push({
+        area: '任务管理',
+        suggestion: '清理已完成的任务记忆，对长期未处理的任务降低重要性',
+        priority: 'high',
+      });
+    }
+
+    // Pattern: Strong preference accumulation
+    const prefCount = typeCounts['preference'] || 0;
+    if (prefCount >= 5) {
+      const prefMemories = memories.filter(m => m.memory_type === 'preference').slice(0, 3);
+      patterns.push({
+        observation: `已记录 ${prefCount} 个用户偏好，对用户习惯有较好理解`,
+        frequency: prefCount,
+        sentiment: 'positive',
+        evidence: prefMemories.map(m => m.content),
+      });
+    }
+
+    // Pattern: Lessons learned
+    const lessonCount = typeCounts['lesson'] || 0;
+    if (lessonCount >= 5) {
+      patterns.push({
+        observation: `积累了 ${lessonCount} 条经验教训，知识库在成长`,
+        frequency: lessonCount,
+        sentiment: 'positive',
+        evidence: memories.filter(m => m.memory_type === 'lesson').slice(0, 3).map(m => m.content),
+      });
+    }
+
+    // Pattern: High-access important memories
+    const highAccessMemories = memories.filter(m => m.access_count >= 5 && m.importance >= 7);
+    if (highAccessMemories.length >= 3) {
+      patterns.push({
+        observation: `有 ${highAccessMemories.length} 条高频访问的重要记忆，核心知识正在形成`,
+        frequency: highAccessMemories.length,
+        sentiment: 'positive',
+        evidence: highAccessMemories.slice(0, 3).map(m => m.content),
+      });
+    }
+
+    // Pattern: Low importance memories accumulating
+    const lowImportanceCount = memories.filter(m => m.importance <= 3).length;
+    if (lowImportanceCount > 20) {
+      patterns.push({
+        observation: `有 ${lowImportanceCount} 条低重要性记忆，建议清理`,
+        frequency: lowImportanceCount,
+        sentiment: 'neutral',
+        evidence: [],
+      });
+      improvements.push({
+        area: '记忆管理',
+        suggestion: '执行记忆清理，移除30天以上未访问且重要性低于3的记忆',
+        priority: 'medium',
+      });
+    }
+
+    // Generate identity proposal if negative patterns exist
+    const negativePatterns = patterns.filter(p => p.sentiment === 'negative');
+    if (negativePatterns.length >= 2) {
+      const additions = negativePatterns.map(p => `- 注意: ${p.observation}`).join('\n');
+      identityProposals.push({
+        agent_id: agentId,
+        field: 'instructions',
+        current_value: '...',
+        proposed_value: `\n\n## 自我反思改进\n${additions}`,
+        reason: `基于 ${negativePatterns.length} 个负面模式观察，建议在指令中增加自我改进提醒`,
+      });
+    }
+
+    // Suggestion: User profile enrichment
+    if (prefCount < 3) {
+      improvements.push({
+        area: '用户理解',
+        suggestion: '主动在对话中了解用户偏好（沟通风格、技术栈、工作习惯），丰富用户画像',
+        priority: 'medium',
+      });
+    }
+
+    const result: ReflectionResult = {
+      patterns,
+      improvements,
+      identity_proposals: identityProposals,
+      new_memories: patterns.filter(p => p.frequency >= 3).length + improvements.filter(i => i.priority === 'high').length,
+      timestamp: new Date().toISOString(),
+    };
+
+    // Store in history
+    fallbackReflection._history.push(result);
+    if (fallbackReflection._history.length > 20) {
+      fallbackReflection._history = fallbackReflection._history.slice(-10);
+    }
+
+    return result;
+  },
+
+  async getHistory(limit?: number, _agentId?: string): Promise<ReflectionResult[]> {
+    const l = limit ?? 10;
+    return fallbackReflection._history.slice(-l).reverse();
+  },
+
+  async getState(): Promise<ReflectionState> {
+    return {
+      conversations_since_reflection: fallbackReflection._conversationCount,
+      last_reflection_time: fallbackReflection._lastReflection,
+      last_reflection_agent_id: null,
+    };
+  },
+};
diff --git a/desktop/src/lib/intelligence-client/index.ts b/desktop/src/lib/intelligence-client/index.ts
new file mode 100644
index 0000000..78ef29a
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/index.ts
@@ -0,0 +1,72 @@
+/**
+ * Intelligence Layer - Barrel Re-export
+ *
+ * Re-exports everything from sub-modules to maintain backward compatibility.
+ * Existing imports like `import { intelligenceClient } from './intelligence-client'`
+ * continue to work unchanged because TypeScript resolves directory imports
+ * through this index.ts file.
+ */
+
+// Types
+export type {
+  MemoryType,
+  MemorySource,
+  MemoryEntry,
+  MemorySearchOptions,
+  MemoryStats,
+  BehaviorPattern,
+  PatternTypeVariant,
+  PatternContext,
+  WorkflowRecommendation,
+  MeshConfig,
+  MeshAnalysisResult,
+  ActivityType,
+  EvolutionChangeType,
+  InsightCategory,
+  IdentityFileType,
+  ProposalStatus,
+  EvolutionProposal,
+  ProfileUpdate,
+  EvolutionInsight,
+  EvolutionResult,
+  PersonaEvolverConfig,
+  PersonaEvolverState,
+} from './types';
+
+export {
+  getPatternTypeString,
+} from './types';
+
+// Re-exported types from intelligence-backend
+export type {
+  HeartbeatConfig,
+  HeartbeatResult,
+  HeartbeatAlert,
+  CompactableMessage,
+  CompactionResult,
+  CompactionCheck,
+  CompactionConfig,
+  PatternObservation,
+  ImprovementSuggestion,
+  ReflectionResult,
+  ReflectionState,
+  ReflectionConfig,
+  ReflectionIdentityProposal,
+  IdentityFiles,
+  IdentityChangeProposal,
+  IdentitySnapshot,
+  MemoryEntryForAnalysis,
+} from './types';
+
+// Type conversion utilities
+export {
+  toFrontendMemory,
+  toBackendMemoryInput,
+  toBackendSearchOptions,
+  toFrontendStats,
+  parseTags,
+} from './type-conversions';
+
+// Unified client
+export { intelligenceClient } from './unified-client';
+export { intelligenceClient as default } from './unified-client';
diff --git a/desktop/src/lib/intelligence-client/type-conversions.ts b/desktop/src/lib/intelligence-client/type-conversions.ts
new file mode 100644
index 0000000..c629ce7
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/type-conversions.ts
@@ -0,0 +1,101 @@
+/**
+ * Intelligence Layer - Type Conversion Utilities
+ *
+ * Functions for converting between frontend and backend data formats.
+ */
+
+import { intelligence } from '../intelligence-backend';
+import type {
+  MemoryEntryInput,
+  PersistentMemory,
+  MemorySearchOptions as BackendSearchOptions,
+  MemoryStats as BackendMemoryStats,
+} from '../intelligence-backend';
+
+import { createLogger } from '../logger';
+
+import type { MemoryEntry, MemorySearchOptions, MemoryStats, MemoryType, MemorySource } from './types';
+
+const logger = createLogger('intelligence-client');
+
+// Re-import intelligence for use in conversions (already imported above but
+// the `intelligence` binding is needed by unified-client.ts indirectly).
+
+export { intelligence };
+export type { MemoryEntryInput, PersistentMemory, BackendSearchOptions, BackendMemoryStats };
+
+/**
+ * Convert backend PersistentMemory to frontend MemoryEntry format
+ */
+export function toFrontendMemory(backend: PersistentMemory): MemoryEntry {
+  return {
+    id: backend.id,
+    agentId: backend.agent_id,
+    content: backend.content,
+    type: backend.memory_type as MemoryType,
+    importance: backend.importance,
+    source: backend.source as MemorySource,
+    tags: parseTags(backend.tags),
+    createdAt: backend.created_at,
+    lastAccessedAt: backend.last_accessed_at,
+    accessCount: backend.access_count,
+    conversationId: backend.conversation_id ?? undefined,
+  };
+}
+
+/**
+ * Convert frontend MemoryEntry to backend MemoryEntryInput format
+ */
+export function toBackendMemoryInput(entry: Omit<MemoryEntry, 'id' | 'createdAt' | 'lastAccessedAt' | 'accessCount'>): MemoryEntryInput {
+  return {
+    agent_id: entry.agentId,
+    memory_type: entry.type,
+    content: entry.content,
+    importance: entry.importance,
+    source: entry.source,
+    tags: entry.tags,
+    conversation_id: entry.conversationId,
+  };
+}
+
+/**
+ * Convert frontend search options to backend format
+ */
+export function toBackendSearchOptions(options: MemorySearchOptions): BackendSearchOptions {
+  return {
+    agent_id: options.agentId,
+    memory_type: options.type,
+    tags: options.tags,
+    query: options.query,
+    limit: options.limit,
+    min_importance: options.minImportance,
+  };
+}
+
+/**
+ * Convert backend stats to frontend format
+ */
+export function toFrontendStats(backend: BackendMemoryStats): MemoryStats {
+  return {
+    totalEntries: backend.total_entries,
+    byType: backend.by_type,
+    byAgent: backend.by_agent,
+    oldestEntry: backend.oldest_entry,
+    newestEntry: backend.newest_entry,
+    storageSizeBytes: backend.storage_size_bytes ?? 0,
+  };
+}
+
+/**
+ * Parse tags from backend (JSON string or array)
+ */
+export function parseTags(tags: string | string[]): string[] {
+  if (Array.isArray(tags)) return tags;
+  if (!tags) return [];
+  try {
+    return JSON.parse(tags);
+  } catch (e) {
+    logger.debug('JSON parse failed for tags, using fallback', { error: e });
+    return [];
+  }
+}
diff --git a/desktop/src/lib/intelligence-client/types.ts b/desktop/src/lib/intelligence-client/types.ts
new file mode 100644
index 0000000..5136bc2
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/types.ts
@@ -0,0 +1,199 @@
+/**
+ * Intelligence Layer - Type Definitions
+ *
+ * All frontend types, mesh types, persona evolver types,
+ * and re-exports from intelligence-backend.
+ */
+
+// === Re-export types from intelligence-backend ===
+
+export type {
+  HeartbeatConfig,
+  HeartbeatResult,
+  HeartbeatAlert,
+  CompactableMessage,
+  CompactionResult,
+  CompactionCheck,
+  CompactionConfig,
+  PatternObservation,
+  ImprovementSuggestion,
+  ReflectionResult,
+  ReflectionState,
+  ReflectionConfig,
+  ReflectionIdentityProposal,
+  IdentityFiles,
+  IdentityChangeProposal,
+  IdentitySnapshot,
+  MemoryEntryForAnalysis,
+} from '../intelligence-backend';
+
+// === Frontend Types (for backward compatibility) ===
+
+export type MemoryType = 'fact' | 'preference' | 'lesson' | 'context' | 'task';
+export type MemorySource = 'auto' | 'user' | 'reflection' | 'llm-reflection';
+
+export interface MemoryEntry {
+  id: string;
+  agentId: string;
+  content: string;
+  type: MemoryType;
+  importance: number;
+  source: MemorySource;
+  tags: string[];
+  createdAt: string;
+  lastAccessedAt: string;
+  accessCount: number;
+  conversationId?: string;
+}
+
+export interface MemorySearchOptions {
+  agentId?: string;
+  type?: MemoryType;
+  types?: MemoryType[];
+  tags?: string[];
+  query?: string;
+  limit?: number;
+  minImportance?: number;
+}
+
+export interface MemoryStats {
+  totalEntries: number;
+  byType: Record<string, number>;
+  byAgent: Record<string, number>;
+  oldestEntry: string | null;
+  newestEntry: string | null;
+  storageSizeBytes: number;
+}
+
+// === Mesh Types ===
+
+export type PatternTypeVariant =
+  | { type: 'SkillCombination'; skill_ids: string[] }
+  | { type: 'TemporalTrigger'; hand_id: string; time_pattern: string }
+  | { type: 'TaskPipelineMapping'; task_type: string; pipeline_id: string }
+  | { type: 'InputPattern'; keywords: string[]; intent: string };
+
+export interface BehaviorPattern {
+  id: string;
+  pattern_type: PatternTypeVariant;
+  frequency: number;
+  last_occurrence: string;
+  first_occurrence: string;
+  confidence: number;
+  context: PatternContext;
+}
+
+export function getPatternTypeString(patternType: PatternTypeVariant): string {
+  if (typeof patternType === 'string') {
+    return patternType;
+  }
+  return patternType.type;
+}
+
+export interface PatternContext {
+  skill_ids?: string[];
+  recent_topics?: string[];
+  intent?: string;
+  time_of_day?: number;
+  day_of_week?: number;
+}
+
+export interface WorkflowRecommendation {
+  id: string;
+  pipeline_id: string;
+  confidence: number;
+  reason: string;
+  suggested_inputs: Record<string, unknown>;
+  patterns_matched: string[];
+  timestamp: string;
+}
+
+export interface MeshConfig {
+  enabled: boolean;
+  min_confidence: number;
+  max_recommendations: number;
+  analysis_window_hours: number;
+}
+
+export interface MeshAnalysisResult {
+  recommendations: WorkflowRecommendation[];
+  patterns_detected: number;
+  timestamp: string;
+}
+
+export type ActivityType =
+  | { type: 'skill_used'; skill_ids: string[] }
+  | { type: 'pipeline_executed'; task_type: string; pipeline_id: string }
+  | { type: 'input_received'; keywords: string[]; intent: string };
+
+// === Persona Evolver Types ===
+
+export type EvolutionChangeType =
+  | 'instruction_addition'
+  | 'instruction_refinement'
+  | 'trait_addition'
+  | 'style_adjustment'
+  | 'domain_expansion';
+
+export type InsightCategory =
+  | 'communication_style'
+  | 'technical_expertise'
+  | 'task_efficiency'
+  | 'user_preference'
+  | 'knowledge_gap';
+
+export type IdentityFileType = 'soul' | 'instructions';
+export type ProposalStatus = 'pending' | 'approved' | 'rejected';
+
+export interface EvolutionProposal {
+  id: string;
+  agent_id: string;
+  target_file: IdentityFileType;
+  change_type: EvolutionChangeType;
+  reason: string;
+  current_content: string;
+  proposed_content: string;
+  confidence: number;
+  evidence: string[];
+  status: ProposalStatus;
+  created_at: string;
+}
+
+export interface ProfileUpdate {
+  section: string;
+  previous: string;
+  updated: string;
+  source: string;
+}
+
+export interface EvolutionInsight {
+  category: InsightCategory;
+  observation: string;
+  recommendation: string;
+  confidence: number;
+}
+
+export interface EvolutionResult {
+  agent_id: string;
+  timestamp: string;
+  profile_updates: ProfileUpdate[];
+  proposals: EvolutionProposal[];
+  insights: EvolutionInsight[];
+  evolved: boolean;
+}
+
+export interface PersonaEvolverConfig {
+  auto_profile_update: boolean;
+  min_preferences_for_update: number;
+  min_conversations_for_evolution: number;
+  enable_instruction_refinement: boolean;
+  enable_soul_evolution: boolean;
+  max_proposals_per_cycle: number;
+}
+
+export interface PersonaEvolverState {
+  last_evolution: string | null;
+  total_evolutions: number;
+  pending_proposals: number;
+  profile_enrichment_score: number;
+}
diff --git a/desktop/src/lib/intelligence-client/unified-client.ts b/desktop/src/lib/intelligence-client/unified-client.ts
new file mode 100644
index 0000000..8ec52aa
--- /dev/null
+++ b/desktop/src/lib/intelligence-client/unified-client.ts
@@ -0,0 +1,561 @@
+/**
+ * Intelligence Layer Unified Client
+ *
+ * Provides a unified API for intelligence operations that:
+ * - Uses Rust backend (via Tauri commands) when running in Tauri environment
+ * - Falls back to localStorage-based implementation in browser/dev environment
+ *
+ * Degradation strategy:
+ * - In Tauri mode: if a Tauri invoke fails, the error is logged and re-thrown.
+ *   The caller is responsible for handling the error. We do NOT silently fall
+ *   back to localStorage, because that would give users degraded functionality
+ *   (localStorage instead of SQLite, rule-based instead of LLM-based, no-op
+ *   instead of real execution) without any indication that something is wrong.
+ * - In browser/dev mode: localStorage fallback is the intended behavior for
+ *   development and testing without a Tauri backend.
+ *
+ * This replaces direct usage of:
+ * - agent-memory.ts
+ * - heartbeat-engine.ts
+ * - context-compactor.ts
+ * - reflection-engine.ts
+ * - agent-identity.ts
+ *
+ * Usage:
+ * ```typescript
+ * import { intelligenceClient, toFrontendMemory, toBackendMemoryInput } from './intelligence-client';
+ *
+ * // Store memory
+ * const id = await intelligenceClient.memory.store({
+ *   agent_id: 'agent-1',
+ *   memory_type: 'fact',
+ *   content: 'User prefers concise responses',
+ *   importance: 7,
+ * });
+ *
+ * // Search memories
+ * const memories = await intelligenceClient.memory.search({
+ *   agent_id: 'agent-1',
+ *   query: 'user preference',
+ *   limit: 10,
+ * });
+ *
+ * // Convert to frontend format if needed
+ * const frontendMemories = memories.map(toFrontendMemory);
+ * ```
+ */
+
+import { invoke } from '@tauri-apps/api/core';
+
+import { isTauriRuntime } from '../tauri-gateway';
+import { intelligence } from './type-conversions';
+import type { PersistentMemory } from '../intelligence-backend';
+import type {
+  HeartbeatConfig,
+  HeartbeatResult,
+  CompactableMessage,
+  CompactionResult,
+  CompactionCheck,
+  CompactionConfig,
+  ReflectionConfig,
+  ReflectionResult,
+  ReflectionState,
+  MemoryEntryForAnalysis,
+  IdentityFiles,
+  IdentityChangeProposal,
+  IdentitySnapshot,
+} from '../intelligence-backend';
+
+import type { MemoryEntry, MemorySearchOptions, MemoryStats } from './types';
+import { toFrontendMemory, toBackendSearchOptions, toFrontendStats } from './type-conversions';
+import { fallbackMemory } from './fallback-memory';
+import { fallbackCompactor } from './fallback-compactor';
+import { fallbackReflection } from './fallback-reflection';
+import { fallbackIdentity } from './fallback-identity';
+import { fallbackHeartbeat } from './fallback-heartbeat';
+
+/**
+ * Helper: wrap a Tauri invoke call so that failures are logged and re-thrown
+ * instead of silently falling back to localStorage implementations.
+ */
+function tauriInvoke<T>(label: string, fn: () => Promise<T>): Promise<T> {
+  return fn().catch((e: unknown) => {
+    console.warn(`[IntelligenceClient] Tauri invoke failed (${label}):`, e);
+    throw e;
+  });
+}
+
+/**
+ * Unified intelligence client that automatically selects backend or fallback.
+ *
+ * - In Tauri mode: calls Rust backend via invoke(). On failure, logs a warning
+ *   and re-throws -- does NOT fall back to localStorage.
+ * - In browser/dev mode: uses localStorage-based fallback implementations.
+ */
+export const intelligenceClient = {
+  memory: {
+    init: async (): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('memory.init', () => intelligence.memory.init());
+      } else {
+        await fallbackMemory.init();
+      }
+    },
+
+    store: async (entry: import('../intelligence-backend').MemoryEntryInput): Promise<string> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('memory.store', () => intelligence.memory.store(entry));
+      }
+      return fallbackMemory.store(entry);
+    },
+
+    get: async (id: string): Promise<MemoryEntry | null> => {
+      if (isTauriRuntime()) {
+        const result = await tauriInvoke('memory.get', () => intelligence.memory.get(id));
+        return result ? toFrontendMemory(result) : null;
+      }
+      return fallbackMemory.get(id);
+    },
+
+    search: async (options: MemorySearchOptions): Promise<MemoryEntry[]> => {
+      if (isTauriRuntime()) {
+        const results = await tauriInvoke('memory.search', () =>
+          intelligence.memory.search(toBackendSearchOptions(options))
+        );
+        return results.map(toFrontendMemory);
+      }
+      return fallbackMemory.search(options);
+    },
+
+    delete: async (id: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('memory.delete', () => intelligence.memory.delete(id));
+      } else {
+        await fallbackMemory.delete(id);
+      }
+    },
+
+    deleteAll: async (agentId: string): Promise<number> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('memory.deleteAll', () => intelligence.memory.deleteAll(agentId));
+      }
+      return fallbackMemory.deleteAll(agentId);
+    },
+
+    stats: async (): Promise<MemoryStats> => {
+      if (isTauriRuntime()) {
+        const stats = await tauriInvoke('memory.stats', () => intelligence.memory.stats());
+        return toFrontendStats(stats);
+      }
+      return fallbackMemory.stats();
+    },
+
+    export: async (): Promise<MemoryEntry[]> => {
+      if (isTauriRuntime()) {
+        const results = await tauriInvoke('memory.export', () => intelligence.memory.export());
+        return results.map(toFrontendMemory);
+      }
+      return fallbackMemory.export();
+    },
+
+    import: async (memories: MemoryEntry[]): Promise<number> => {
+      if (isTauriRuntime()) {
+        const backendMemories = memories.map(m => ({
+          ...m,
+          agent_id: m.agentId,
+          memory_type: m.type,
+          last_accessed_at: m.lastAccessedAt,
+          created_at: m.createdAt,
+          access_count: m.accessCount,
+          conversation_id: m.conversationId ?? null,
+          tags: JSON.stringify(m.tags),
+          embedding: null,
+        }));
+        return tauriInvoke('memory.import', () =>
+          intelligence.memory.import(backendMemories as PersistentMemory[])
+        );
+      }
+      return fallbackMemory.import(memories);
+    },
+
+    dbPath: async (): Promise<string> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('memory.dbPath', () => intelligence.memory.dbPath());
+      }
+      return fallbackMemory.dbPath();
+    },
+
+    buildContext: async (
+      agentId: string,
+      query: string,
+      maxTokens?: number,
+    ): Promise<{ systemPromptAddition: string; totalTokens: number; memoriesUsed: number }> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('memory.buildContext', () =>
+          intelligence.memory.buildContext(agentId, query, maxTokens ?? null)
+        );
+      }
+      // Browser/dev fallback: use basic search
+      const memories = await fallbackMemory.search({
+        agentId,
+        query,
+        limit: 8,
+        minImportance: 3,
+      });
+      const addition = memories.length > 0
+        ? `## 相关记忆\n${memories.map(m => `- [${m.type}] ${m.content}`).join('\n')}`
+        : '';
+      return { systemPromptAddition: addition, totalTokens: 0, memoriesUsed: memories.length };
+    },
+  },
+
+  heartbeat: {
+    init: async (agentId: string, config?: HeartbeatConfig): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.init', () => intelligence.heartbeat.init(agentId, config));
+      } else {
+        await fallbackHeartbeat.init(agentId, config);
+      }
+    },
+
+    start: async (agentId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.start', () => intelligence.heartbeat.start(agentId));
+      } else {
+        await fallbackHeartbeat.start(agentId);
+      }
+    },
+
+    stop: async (agentId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.stop', () => intelligence.heartbeat.stop(agentId));
+      } else {
+        await fallbackHeartbeat.stop(agentId);
+      }
+    },
+
+    tick: async (agentId: string): Promise<HeartbeatResult> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('heartbeat.tick', () => intelligence.heartbeat.tick(agentId));
+      }
+      return fallbackHeartbeat.tick(agentId);
+    },
+
+    getConfig: async (agentId: string): Promise<HeartbeatConfig> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('heartbeat.getConfig', () => intelligence.heartbeat.getConfig(agentId));
+      }
+      return fallbackHeartbeat.getConfig(agentId);
+    },
+
+    updateConfig: async (agentId: string, config: HeartbeatConfig): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.updateConfig', () =>
+          intelligence.heartbeat.updateConfig(agentId, config)
+        );
+      } else {
+        await fallbackHeartbeat.updateConfig(agentId, config);
+      }
+    },
+
+    getHistory: async (agentId: string, limit?: number): Promise<HeartbeatResult[]> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('heartbeat.getHistory', () =>
+          intelligence.heartbeat.getHistory(agentId, limit)
+        );
+      }
+      return fallbackHeartbeat.getHistory(agentId, limit);
+    },
+
+    updateMemoryStats: async (
+      agentId: string,
+      taskCount: number,
+      totalEntries: number,
+      storageSizeBytes: number
+    ): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.updateMemoryStats', () =>
+          invoke('heartbeat_update_memory_stats', {
+            agent_id: agentId,
+            task_count: taskCount,
+            total_entries: totalEntries,
+            storage_size_bytes: storageSizeBytes,
+          })
+        );
+      } else {
+        // Browser/dev fallback only
+        const cache = {
+          taskCount,
+          totalEntries,
+          storageSizeBytes,
+          lastUpdated: new Date().toISOString(),
+        };
+        localStorage.setItem(`zclaw-memory-stats-${agentId}`, JSON.stringify(cache));
+      }
+    },
+
+    recordCorrection: async (agentId: string, correctionType: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.recordCorrection', () =>
+          invoke('heartbeat_record_correction', {
+            agent_id: agentId,
+            correction_type: correctionType,
+          })
+        );
+      } else {
+        // Browser/dev fallback only
+        const key = `zclaw-corrections-${agentId}`;
+        const stored = localStorage.getItem(key);
+        const counters = stored ? JSON.parse(stored) : {};
+        counters[correctionType] = (counters[correctionType] || 0) + 1;
+        localStorage.setItem(key, JSON.stringify(counters));
+      }
+    },
+
+    recordInteraction: async (agentId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('heartbeat.recordInteraction', () =>
+          invoke('heartbeat_record_interaction', {
+            agent_id: agentId,
+          })
+        );
+      } else {
+        // Browser/dev fallback only
+        localStorage.setItem(`zclaw-last-interaction-${agentId}`, new Date().toISOString());
+      }
+    },
+  },
+
+  compactor: {
+    estimateTokens: async (text: string): Promise<number> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('compactor.estimateTokens', () =>
+          intelligence.compactor.estimateTokens(text)
+        );
+      }
+      return fallbackCompactor.estimateTokens(text);
+    },
+
+    estimateMessagesTokens: async (messages: CompactableMessage[]): Promise<number> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('compactor.estimateMessagesTokens', () =>
+          intelligence.compactor.estimateMessagesTokens(messages)
+        );
+      }
+      return fallbackCompactor.estimateMessagesTokens(messages);
+    },
+
+    checkThreshold: async (
+      messages: CompactableMessage[],
+      config?: CompactionConfig
+    ): Promise<CompactionCheck> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('compactor.checkThreshold', () =>
+          intelligence.compactor.checkThreshold(messages, config)
+        );
+      }
+      return fallbackCompactor.checkThreshold(messages, config);
+    },
+
+    compact: async (
+      messages: CompactableMessage[],
+      agentId: string,
+      conversationId?: string,
+      config?: CompactionConfig
+    ): Promise<CompactionResult> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('compactor.compact', () =>
+          intelligence.compactor.compact(messages, agentId, conversationId, config)
+        );
+      }
+      return fallbackCompactor.compact(messages, agentId, conversationId, config);
+    },
+  },
+
+  reflection: {
+    init: async (config?: ReflectionConfig): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('reflection.init', () => intelligence.reflection.init(config));
+      } else {
+        await fallbackReflection.init(config);
+      }
+    },
+
+    recordConversation: async (): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('reflection.recordConversation', () =>
+          intelligence.reflection.recordConversation()
+        );
+      } else {
+        await fallbackReflection.recordConversation();
+      }
+    },
+
+    shouldReflect: async (): Promise<boolean> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('reflection.shouldReflect', () =>
+          intelligence.reflection.shouldReflect()
+        );
+      }
+      return fallbackReflection.shouldReflect();
+    },
+
+    reflect: async (agentId: string, memories: MemoryEntryForAnalysis[]): Promise<ReflectionResult> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('reflection.reflect', () =>
+          intelligence.reflection.reflect(agentId, memories)
+        );
+      }
+      return fallbackReflection.reflect(agentId, memories);
+    },
+
+    getHistory: async (limit?: number, agentId?: string): Promise<ReflectionResult[]> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('reflection.getHistory', () =>
+          intelligence.reflection.getHistory(limit, agentId)
+        );
+      }
+      return fallbackReflection.getHistory(limit, agentId);
+    },
+
+    getState: async (): Promise<ReflectionState> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('reflection.getState', () => intelligence.reflection.getState());
+      }
+      return fallbackReflection.getState();
+    },
+  },
+
+  identity: {
+    get: async (agentId: string): Promise<IdentityFiles> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.get', () => intelligence.identity.get(agentId));
+      }
+      return fallbackIdentity.get(agentId);
+    },
+
+    getFile: async (agentId: string, file: string): Promise<string> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.getFile', () => intelligence.identity.getFile(agentId, file));
+      }
+      return fallbackIdentity.getFile(agentId, file);
+    },
+
+    buildPrompt: async (agentId: string, memoryContext?: string): Promise<string> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.buildPrompt', () =>
+          intelligence.identity.buildPrompt(agentId, memoryContext)
+        );
+      }
+      return fallbackIdentity.buildPrompt(agentId, memoryContext);
+    },
+
+    updateUserProfile: async (agentId: string, content: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.updateUserProfile', () =>
+          intelligence.identity.updateUserProfile(agentId, content)
+        );
+      } else {
+        await fallbackIdentity.updateUserProfile(agentId, content);
+      }
+    },
+
+    appendUserProfile: async (agentId: string, addition: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.appendUserProfile', () =>
+          intelligence.identity.appendUserProfile(agentId, addition)
+        );
+      } else {
+        await fallbackIdentity.appendUserProfile(agentId, addition);
+      }
+    },
+
+    proposeChange: async (
+      agentId: string,
+      file: 'soul' | 'instructions',
+      suggestedContent: string,
+      reason: string
+    ): Promise<IdentityChangeProposal> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.proposeChange', () =>
+          intelligence.identity.proposeChange(agentId, file, suggestedContent, reason)
+        );
+      }
+      return fallbackIdentity.proposeChange(agentId, file, suggestedContent, reason);
+    },
+
+    approveProposal: async (proposalId: string): Promise<IdentityFiles> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.approveProposal', () =>
+          intelligence.identity.approveProposal(proposalId)
+        );
+      }
+      return fallbackIdentity.approveProposal(proposalId);
+    },
+
+    rejectProposal: async (proposalId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.rejectProposal', () =>
+          intelligence.identity.rejectProposal(proposalId)
+        );
+      } else {
+        await fallbackIdentity.rejectProposal(proposalId);
+      }
+    },
+
+    getPendingProposals: async (agentId?: string): Promise<IdentityChangeProposal[]> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.getPendingProposals', () =>
+          intelligence.identity.getPendingProposals(agentId)
+        );
+      }
+      return fallbackIdentity.getPendingProposals(agentId);
+    },
+
+    updateFile: async (agentId: string, file: string, content: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.updateFile', () =>
+          intelligence.identity.updateFile(agentId, file, content)
+        );
+      } else {
+        await fallbackIdentity.updateFile(agentId, file, content);
+      }
+    },
+
+    getSnapshots: async (agentId: string, limit?: number): Promise<IdentitySnapshot[]> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.getSnapshots', () =>
+          intelligence.identity.getSnapshots(agentId, limit)
+        );
+      }
+      return fallbackIdentity.getSnapshots(agentId, limit);
+    },
+
+    restoreSnapshot: async (agentId: string, snapshotId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.restoreSnapshot', () =>
+          intelligence.identity.restoreSnapshot(agentId, snapshotId)
+        );
+      } else {
+        await fallbackIdentity.restoreSnapshot(agentId, snapshotId);
+      }
+    },
+
+    listAgents: async (): Promise<string[]> => {
+      if (isTauriRuntime()) {
+        return tauriInvoke('identity.listAgents', () => intelligence.identity.listAgents());
+      }
+      return fallbackIdentity.listAgents();
+    },
+
+    deleteAgent: async (agentId: string): Promise<void> => {
+      if (isTauriRuntime()) {
+        await tauriInvoke('identity.deleteAgent', () => intelligence.identity.deleteAgent(agentId));
+      } else {
+        await fallbackIdentity.deleteAgent(agentId);
+      }
+    },
+  },
+};
+
+export default intelligenceClient;
diff --git a/desktop/src/lib/kernel-chat.ts b/desktop/src/lib/kernel-chat.ts
index 5e5fd23..bb66043 100644
--- a/desktop/src/lib/kernel-chat.ts
+++ b/desktop/src/lib/kernel-chat.ts
@@ -56,6 +56,9 @@ export function installChatMethods(ClientClass: { prototype: KernelClient }): vo
     opts?: {
       sessionKey?: string;
       agentId?: string;
+      thinking_enabled?: boolean;
+      reasoning_effort?: string;
+      plan_mode?: boolean;
     }
   ): Promise<{ runId: string }> {
     const runId = crypto.randomUUID();
@@ -68,6 +71,20 @@ export function installChatMethods(ClientClass: { prototype: KernelClient }): vo
     }
 
     let unlisten: UnlistenFn | null = null;
+    let completed = false;
+    // Stream timeout — prevent hanging forever if backend never sends complete/error
+    const STREAM_TIMEOUT_MS = 5 * 60 * 1000; // 5 minutes
+    const timeoutId = setTimeout(() => {
+      if (!completed) {
+        completed = true;
+        log.warn('Stream timeout — no complete/error event received');
+        callbacks.onError('响应超时，请重试');
+        if (unlisten) {
+          unlisten();
+          unlisten = null;
+        }
+      }
+    }, STREAM_TIMEOUT_MS);
 
     try {
       // Set up event listener for stream chunks
@@ -129,6 +146,8 @@ export function installChatMethods(ClientClass: { prototype: KernelClient }): vo
 
           case 'complete':
             log.debug('Stream complete:', streamEvent.inputTokens, streamEvent.outputTokens);
+            completed = true;
+            clearTimeout(timeoutId);
             callbacks.onComplete(streamEvent.inputTokens, streamEvent.outputTokens);
             // Clean up listener
             if (unlisten) {
@@ -139,6 +158,8 @@ export function installChatMethods(ClientClass: { prototype: KernelClient }): vo
 
           case 'error':
             log.error('Stream error:', streamEvent.message);
+            completed = true;
+            clearTimeout(timeoutId);
             callbacks.onError(streamEvent.message);
             // Clean up listener
             if (unlisten) {
@@ -155,6 +176,9 @@ export function installChatMethods(ClientClass: { prototype: KernelClient }): vo
           agentId,
           sessionId,
           message,
+          thinkingEnabled: opts?.thinking_enabled,
+          reasoningEffort: opts?.reasoning_effort,
+          planMode: opts?.plan_mode,
         },
       });
     } catch (err: unknown) {
diff --git a/desktop/src/lib/kernel-client.ts b/desktop/src/lib/kernel-client.ts
index db8fd95..9721cf8 100644
--- a/desktop/src/lib/kernel-client.ts
+++ b/desktop/src/lib/kernel-client.ts
@@ -403,7 +403,7 @@ export interface KernelClient {
 
   // Chat (kernel-chat.ts)
   chat(message: string, opts?: { sessionKey?: string; agentId?: string }): Promise<{ runId: string; sessionId?: string; response?: string }>;
-  chatStream(message: string, callbacks: import('./kernel-types').StreamCallbacks, opts?: { sessionKey?: string; agentId?: string }): Promise<{ runId: string }>;
+  chatStream(message: string, callbacks: import('./kernel-types').StreamCallbacks, opts?: { sessionKey?: string; agentId?: string; thinking_enabled?: boolean; reasoning_effort?: string; plan_mode?: boolean }): Promise<{ runId: string }>;
   cancelStream(runId: string): void;
   fetchDefaultAgentId(): Promise<string | null>;
   setDefaultAgentId(agentId: string): void;
diff --git a/desktop/src/store/chatStore.ts b/desktop/src/store/chatStore.ts
index 0aab37b..80f4b69 100644
--- a/desktop/src/store/chatStore.ts
+++ b/desktop/src/store/chatStore.ts
@@ -10,6 +10,9 @@ import { useConnectionStore } from './connectionStore';
 import { createLogger } from '../lib/logger';
 import { speechSynth } from '../lib/speech-synth';
 import { generateRandomString } from '../lib/crypto-utils';
+import type { ChatModeType, ChatModeConfig, Subtask } from '../components/ai';
+import type { ToolCallStep } from '../components/ai';
+import { CHAT_MODES } from '../components/ai';
 
 const log = createLogger('ChatStore');
 
@@ -49,6 +52,12 @@ export interface Message {
   // Output files and code blocks
   files?: MessageFile[];
   codeBlocks?: CodeBlock[];
+  // AI Enhancement fields (DeerFlow-inspired)
+  thinkingContent?: string;  // Extended thinking/reasoning content
+  subtasks?: Subtask[];      // Sub-agent task tracking
+  toolSteps?: ToolCallStep[]; // Tool call steps chain (DeerFlow-inspired)
+  // Optimistic message flag (Phase 4: DeerFlow-inspired 3-phase optimistic rendering)
+  optimistic?: boolean;      // true = awaiting server confirmation, false/undefined = confirmed
 }
 
 export interface Conversation {
@@ -90,6 +99,14 @@ interface ChatState {
   // Token usage tracking
   totalInputTokens: number;
   totalOutputTokens: number;
+  // Chat mode (DeerFlow-inspired)
+  chatMode: ChatModeType;
+  // Follow-up suggestions
+  suggestions: string[];
+  // Artifacts (DeerFlow-inspired)
+  artifacts: import('../components/ai/ArtifactPanel').ArtifactFile[];
+  selectedArtifactId: string | null;
+  artifactPanelOpen: boolean;
 
   addMessage: (message: Message) => void;
   updateMessage: (id: string, updates: Partial<Message>) => void;
@@ -105,6 +122,17 @@ interface ChatState {
   addTokenUsage: (inputTokens: number, outputTokens: number) => void;
   getTotalTokens: () => { input: number; output: number; total: number };
   searchSkills: (query: string) => { results: Array<{ id: string; name: string; description: string }>; totalAvailable: number };
+  // Chat mode and suggestions (DeerFlow-inspired)
+  setChatMode: (mode: ChatModeType) => void;
+  getChatModeConfig: () => ChatModeConfig;
+  setSuggestions: (suggestions: string[]) => void;
+  addSubtask: (messageId: string, task: Subtask) => void;
+  updateSubtask: (messageId: string, taskId: string, updates: Partial<Subtask>) => void;
+  // Artifact management (DeerFlow-inspired)
+  addArtifact: (artifact: import('../components/ai/ArtifactPanel').ArtifactFile) => void;
+  selectArtifact: (id: string | null) => void;
+  setArtifactPanelOpen: (open: boolean) => void;
+  clearArtifacts: () => void;
 }
 
 function generateConvId(): string {
@@ -189,6 +217,44 @@ function upsertActiveConversation(
   return [nextConversation, ...conversations];
 }
 
+/**
+ * Generate follow-up suggestions based on assistant response content.
+ * Uses keyword heuristics to suggest contextually relevant follow-ups.
+ */
+function generateFollowUpSuggestions(content: string): string[] {
+  const suggestions: string[] = [];
+  const lower = content.toLowerCase();
+
+  const patterns: Array<{ keywords: string[]; suggestion: string }> = [
+    { keywords: ['代码', 'code', 'function', '函数', '实现'], suggestion: '解释这段代码的工作原理' },
+    { keywords: ['错误', 'error', 'bug', '问题'], suggestion: '如何调试这个问题？' },
+    { keywords: ['数据', 'data', '分析', '统计'], suggestion: '可视化这些数据' },
+    { keywords: ['步骤', 'step', '流程', '方案'], suggestion: '详细说明第一步该怎么做' },
+    { keywords: ['可以', '建议', '推荐', '试试'], suggestion: '还有其他方案吗？' },
+    { keywords: ['文件', 'file', '保存', '写入'], suggestion: '查看生成的文件内容' },
+    { keywords: ['搜索', 'search', '查找', 'research'], suggestion: '搜索更多相关信息' },
+  ];
+
+  for (const { keywords, suggestion } of patterns) {
+    if (keywords.some(kw => lower.includes(kw))) {
+      if (!suggestions.includes(suggestion)) {
+        suggestions.push(suggestion);
+      }
+    }
+    if (suggestions.length >= 3) break;
+  }
+
+  // Always add a generic follow-up if we have fewer than 3
+  const generic = ['继续深入分析', '换个角度看看', '用简单的话解释'];
+  while (suggestions.length < 3) {
+    const next = generic.find(g => !suggestions.includes(g));
+    if (next) suggestions.push(next);
+    else break;
+  }
+
+  return suggestions;
+}
+
 export const useChatStore = create<ChatState>()(
   persist(
     (set, get) => ({
@@ -203,6 +269,11 @@ export const useChatStore = create<ChatState>()(
   sessionKey: null,
   totalInputTokens: 0,
   totalOutputTokens: 0,
+  chatMode: 'thinking' as ChatModeType,
+  suggestions: [],
+  artifacts: [],
+  selectedArtifactId: null,
+  artifactPanelOpen: false,
 
   addMessage: (message: Message) =>
     set((state) => ({ messages: [...state.messages, message] })),
@@ -331,6 +402,8 @@ export const useChatStore = create<ChatState>()(
 
   sendMessage: async (content: string) => {
     const { addMessage, currentAgent, sessionKey } = get();
+    // Clear stale suggestions when user sends a new message
+    set({ suggestions: [] });
     const effectiveSessionKey = sessionKey || crypto.randomUUID();
     const effectiveAgentId = resolveGatewayAgentId(currentAgent);
     const agentId = currentAgent?.id || 'zclaw-main';
@@ -386,11 +459,14 @@ export const useChatStore = create<ChatState>()(
     }
 
     // Add user message (original content for display)
+    // Mark as optimistic -- will be cleared when server confirms via onComplete
+    const streamStartTime = Date.now();
     const userMsg: Message = {
-      id: `user_${Date.now()}`,
+      id: `user_${streamStartTime}`,
       role: 'user',
       content,
-      timestamp: new Date(),
+      timestamp: new Date(streamStartTime),
+      optimistic: true,
     };
     addMessage(userMsg);
 
@@ -421,6 +497,11 @@ export const useChatStore = create<ChatState>()(
       // Declare runId before chatStream so callbacks can access it
       let runId = `run_${Date.now()}`;
 
+      // F5: Persist sessionKey before starting stream to survive page reload mid-stream
+      if (!get().sessionKey) {
+        set({ sessionKey: effectiveSessionKey });
+      }
+
       // Try streaming first (ZCLAW WebSocket)
       const result = await client.chatStream(
         enhancedContent,
@@ -436,17 +517,22 @@ export const useChatStore = create<ChatState>()(
             }));
           },
           onTool: (tool: string, input: string, output: string) => {
-            const toolMsg: Message = {
-              id: `tool_${Date.now()}_${generateRandomString(4)}`,
-              role: 'tool',
-              content: output || input,
-              timestamp: new Date(),
-              runId,
+            const step: ToolCallStep = {
+              id: `step_${Date.now()}_${generateRandomString(4)}`,
               toolName: tool,
-              toolInput: input,
-              toolOutput: output,
+              input,
+              output,
+              status: output ? 'completed' : 'running',
+              timestamp: new Date(),
             };
-            set((state) => ({ messages: [...state.messages, toolMsg] }));
+            // Add step to the streaming assistant message's toolSteps
+            set((s) => ({
+              messages: s.messages.map((m) =>
+                m.id === assistantId
+                  ? { ...m, toolSteps: [...(m.toolSteps || []), step] }
+                  : m
+              ),
+            }));
           },
           onHand: (name: string, status: string, result?: unknown) => {
             const handMsg: Message = {
@@ -492,9 +578,16 @@ export const useChatStore = create<ChatState>()(
               isStreaming: false,
               conversations,
               currentConversationId: currentConvId,
-              messages: state.messages.map((m) =>
-                m.id === assistantId ? { ...m, streaming: false, runId } : m
-              ),
+              messages: state.messages.map((m) => {
+                if (m.id === assistantId) {
+                  return { ...m, streaming: false, runId };
+                }
+                // Clear optimistic flag on user messages (server confirmed)
+                if (m.optimistic) {
+                  return { ...m, optimistic: false };
+                }
+                return m;
+              }),
             });
 
             // Track token usage if provided (KernelClient provides these)
@@ -520,6 +613,16 @@ export const useChatStore = create<ChatState>()(
                 });
               }
             });
+
+            // Generate follow-up suggestions (DeerFlow-inspired)
+            const assistantMsg = get().messages.find(m => m.id === assistantId);
+            if (assistantMsg?.content) {
+              const content = assistantMsg.content;
+              const suggestions = generateFollowUpSuggestions(content);
+              if (suggestions.length > 0) {
+                get().setSuggestions(suggestions);
+              }
+            }
           },
           onError: (error: string) => {
             set((state) => ({
@@ -527,7 +630,9 @@ export const useChatStore = create<ChatState>()(
               messages: state.messages.map((m) =>
                 m.id === assistantId
                   ? { ...m, content: `⚠️ ${error}`, streaming: false, error }
-                  : m
+                  : m.role === 'user' && m.optimistic && m.timestamp.getTime() >= streamStartTime
+                    ? { ...m, optimistic: false }
+                    : m
               ),
             }));
           },
@@ -535,6 +640,9 @@ export const useChatStore = create<ChatState>()(
         {
           sessionKey: effectiveSessionKey,
           agentId: effectiveAgentId,
+          thinking_enabled: get().getChatModeConfig().thinking_enabled,
+          reasoning_effort: get().getChatModeConfig().reasoning_effort,
+          plan_mode: get().getChatModeConfig().plan_mode,
         }
       );
 
@@ -566,7 +674,9 @@ export const useChatStore = create<ChatState>()(
                 streaming: false,
                 error: errorMessage,
               }
-            : m
+            : m.role === 'user' && m.optimistic && m.timestamp.getTime() >= streamStartTime
+              ? { ...m, optimistic: false }
+              : m
         ),
       }));
     }
@@ -592,6 +702,50 @@ export const useChatStore = create<ChatState>()(
     };
   },
 
+  // Chat mode (DeerFlow-inspired)
+  setChatMode: (mode: ChatModeType) => set({ chatMode: mode }),
+
+  getChatModeConfig: () => CHAT_MODES[get().chatMode].config,
+
+  setSuggestions: (suggestions: string[]) => set({ suggestions }),
+
+  addSubtask: (messageId: string, task: Subtask) =>
+    set((state) => ({
+      messages: state.messages.map((m) =>
+        m.id === messageId
+          ? { ...m, subtasks: [...(m.subtasks || []), task] }
+          : m
+      ),
+    })),
+
+  updateSubtask: (messageId: string, taskId: string, updates: Partial<Subtask>) =>
+    set((state) => ({
+      messages: state.messages.map((m) =>
+        m.id === messageId
+          ? {
+              ...m,
+              subtasks: (m.subtasks || []).map((t) =>
+                t.id === taskId ? { ...t, ...updates } : t
+              ),
+            }
+          : m
+      ),
+    })),
+
+  // Artifact management (DeerFlow-inspired)
+  addArtifact: (artifact) =>
+    set((state) => ({
+      artifacts: [...state.artifacts, artifact],
+      selectedArtifactId: artifact.id,
+      artifactPanelOpen: true,
+    })),
+
+  selectArtifact: (id) => set({ selectedArtifactId: id }),
+
+  setArtifactPanelOpen: (open) => set({ artifactPanelOpen: open }),
+
+  clearArtifacts: () => set({ artifacts: [], selectedArtifactId: null, artifactPanelOpen: false }),
+
   initStreamListener: () => {
     const client = getClient();
 
@@ -629,31 +783,51 @@ export const useChatStore = create<ChatState>()(
           ),
         }));
       } else if (delta.stream === 'tool') {
-        const toolMsg: Message = {
-          id: `tool_${Date.now()}_${generateRandomString(4)}`,
-          role: 'tool',
-          content: delta.toolOutput || '',
+        // Add tool step to the streaming assistant message (DeerFlow-inspired steps chain)
+        const step: ToolCallStep = {
+          id: `step_${Date.now()}_${generateRandomString(4)}`,
+          toolName: delta.tool || 'unknown',
+          input: delta.toolInput,
+          output: delta.toolOutput,
+          status: delta.toolOutput ? 'completed' : 'running',
           timestamp: new Date(),
-          runId: delta.runId,
-          toolName: delta.tool,
-          toolInput: delta.toolInput,
-          toolOutput: delta.toolOutput,
         };
-        set((s) => ({ messages: [...s.messages, toolMsg] }));
+        set((s) => ({
+          messages: s.messages.map((m) =>
+            m.id === streamingMsg.id
+              ? { ...m, toolSteps: [...(m.toolSteps || []), step] }
+              : m
+          ),
+        }));
       } else if (delta.stream === 'lifecycle') {
         if (delta.phase === 'end' || delta.phase === 'error') {
           set((s) => ({
             isStreaming: false,
-            messages: s.messages.map((m) =>
-              m.id === streamingMsg.id
-                ? {
-                    ...m,
-                    streaming: false,
-                    error: delta.phase === 'error' ? delta.error : undefined,
-                  }
-                : m
-            ),
+            messages: s.messages.map((m) => {
+              if (m.id === streamingMsg.id) {
+                return {
+                  ...m,
+                  streaming: false,
+                  error: delta.phase === 'error' ? delta.error : undefined,
+                };
+              }
+              // Clear optimistic flag on user messages (server confirmed)
+              if (m.optimistic) {
+                return { ...m, optimistic: false };
+              }
+              return m;
+            }),
           }));
+          // Generate follow-up suggestions on stream end
+          if (delta.phase === 'end') {
+            const completedMsg = get().messages.find(m => m.id === streamingMsg.id);
+            if (completedMsg?.content) {
+              const suggestions = generateFollowUpSuggestions(completedMsg.content);
+              if (suggestions.length > 0) {
+                get().setSuggestions(suggestions);
+              }
+            }
+          }
         }
       } else if (delta.stream === 'hand') {
         // Handle Hand trigger events from ZCLAW
@@ -699,6 +873,7 @@ export const useChatStore = create<ChatState>()(
         currentModel: state.currentModel,
         currentAgentId: state.currentAgent?.id,
         currentConversationId: state.currentConversationId,
+        chatMode: state.chatMode,
       }),
       onRehydrateStorage: () => (state) => {
         // Rehydrate Date objects from JSON strings
@@ -709,6 +884,7 @@ export const useChatStore = create<ChatState>()(
             for (const msg of conv.messages) {
               msg.timestamp = new Date(msg.timestamp);
               msg.streaming = false; // Never restore streaming state
+              msg.optimistic = false; // Never restore optimistic flag (server already confirmed)
             }
           }
         }
diff --git a/docs/features/01-core-features/00-chat-interface.md b/docs/features/01-core-features/00-chat-interface.md
index 877946f..4897e0e 100644
--- a/docs/features/01-core-features/00-chat-interface.md
+++ b/docs/features/01-core-features/00-chat-interface.md
@@ -3,7 +3,7 @@
 > **分类**: 核心功能
 > **优先级**: P0 - 决定性
 > **成熟度**: L4 - 生产
-> **最后更新**: 2026-03-25
+> **最后更新**: 2026-04-01
 > **验证状态**: ✅ 代码已验证
 
 ---
@@ -42,12 +42,20 @@
 
 | 文件 | 路径 | 用途 |
 |------|------|------|
-| 主组件 | `desktop/src/components/ChatArea.tsx` | 聊天 UI |
+| 主组件 | `desktop/src/components/ChatArea.tsx` | 聊天 UI (DeerFlow 风格) |
 | 状态管理 | `desktop/src/store/chatStore.ts` | 消息和会话状态 |
-| 消息渲染 | `desktop/src/components/MessageItem.tsx` | 单条消息 |
-| Markdown | `desktop/src/components/MarkdownRenderer.tsx` | 轻量 Markdown 渲染 |
+| 模式选择 | `desktop/src/components/ai/ChatMode.tsx` | 下拉式模式切换 (闪速/思考/Pro/Ultra) |
+| 流式渲染 | `desktop/src/components/ai/StreamingText.tsx` | 打字机效果文本渲染 |
+| 推理块 | `desktop/src/components/ai/ReasoningBlock.tsx` | 思考过程折叠展示 |
+| 工具链 | `desktop/src/components/ai/ToolCallChain.tsx` | 工具调用步骤链 |
+| 任务进度 | `desktop/src/components/ai/TaskProgress.tsx` | 子任务追踪 |
+| 建议芯片 | `desktop/src/components/ai/SuggestionChips.tsx` | 快捷建议 |
+| 模型选择 | `desktop/src/components/ai/ModelSelector.tsx` | 模型下拉选择 |
+| 对话容器 | `desktop/src/components/ai/Conversation.tsx` | 消息滚动容器 |
+| 全局样式 | `desktop/src/index.css` | 暖灰色系 + DeerFlow CSS |
 | Tauri 网关 | `desktop/src/lib/tauri-gateway.ts` | Tauri 原生命令 |
 | 内核客户端 | `desktop/src/lib/kernel-client.ts` | Kernel 通信 |
+| Gateway 客户端 | `desktop/src/lib/gateway-client.ts` | WebSocket/REST 通信 |
 
 ---
 
@@ -79,6 +87,7 @@
 
 | 项目 | 参考点 |
 |------|--------|
+| DeerFlow | 卡片式输入框、下拉模式选择器、彩色快捷芯片、极简顶栏、暖灰色系 |
 | ChatGPT | 流式响应、Markdown 渲染 |
 | Claude | 代码块复制、消息操作 |
 | ZCLAW | 历史消息管理 |
@@ -254,6 +263,20 @@ case 'done':
 - [x] 流式中断控制 (AbortController)
 - [x] Agent 切换
 - [x] 工具调用展示 (tool, hand, workflow 消息类型)
+- [x] DeerFlow 视觉风格复刻 (2026-04-01)
+  - 卡片式输入框（白色圆角卡片，textarea 上部 + 操作栏底部）
+  - 下拉式模式选择器（闪速/思考/Pro/Ultra，带图标+描述+勾选）
+  - 彩色快捷操作芯片（小惊喜/写作/研究/收集/学习）
+  - 极简顶栏（对话标题 + token 计数 + 导出按钮）
+  - 暖灰色系全局样式（#faf9f6 bg, #f5f4f1 sidebar, #e8e6e1 border）
+  - DeerFlow 风格侧边栏（Logo + 新对话/对话/智能体 导航）
+  - 对话列表增强（hover 操作栏、内联重命名、Markdown 导出）
+  - 虚拟化消息列表（100+ 条消息自动启用 react-window）
+  - Artifact 右侧面板（可拖拽分割，480px）
+  - 流式 thinking 指示器（Thinking... 动画）
+  - 推理过程折叠展示 (ReasoningBlock)
+  - 工具调用链可视化 (ToolCallChain)
+  - 子任务进度追踪 (TaskProgress)
 
 ### 5.2 测试覆盖
 
diff --git a/docs/features/README.md b/docs/features/README.md
index 64d556b..abe8770 100644
--- a/docs/features/README.md
+++ b/docs/features/README.md
@@ -1,9 +1,9 @@
 # ZCLAW 功能全景文档
 
-> **版本**: v0.8.1
-> **更新日期**: 2026-03-30
-> **项目状态**: 完整 Rust Workspace 架构，10 个核心 Crates，70 技能，Pipeline DSL + Smart Presentation + Agent Growth System + SaaS 平台
-> **整体完成度**: ~87% (核心功能完整，SaaS 平台全面上线，Worker + Scheduler 系统上线，记忆闭环接通)
+> **版本**: v0.9.0
+> **更新日期**: 2026-04-01
+> **项目状态**: 完整 Rust Workspace 架构，10 个核心 Crates，70 技能，Pipeline DSL + Smart Presentation + Agent Growth System + SaaS 平台 + DeerFlow 视觉风格
+> **整体完成度**: ~89% (核心功能完整，SaaS 平台全面上线，DeerFlow 前端视觉复刻完成，Worker + Scheduler 系统上线，记忆闭环接通)
 
 ---
 
@@ -167,6 +167,7 @@ zclaw-saas — 独立运行 (Axum + PostgreSQL, 端口 8080) — 97%
 
 | 日期 | 版本 | 变更内容 |
 |------|------|---------|
+| 2026-04-01 | v0.9.0 | DeerFlow 前端视觉复刻：卡片式输入框、下拉模式选择器（闪速/思考/Pro/Ultra）、彩色快捷操作芯片、极简顶栏+token计数+导出、暖灰色系全局样式（#faf9f6/#f5f4f1/#e8e6e1）、DeerFlow 风格侧边栏、推理/工具链/子任务可视化、Artifact 右侧面板、虚拟化消息列表、Gateway 流式 hang 修复（onclose code 1000 → onComplete）、WebView2 textarea 边框修复（CSS !important） |
 | 2026-03-30 | v0.8.1 | Sprint 5 "稳定清扫": Axum CLOSE_WAIT 修复 (CancellationToken + TCP keepalive + SO_LINGER)，E2E 测试重新启用 (去掉 test.skip)，dead code 注解审计 (36→<10) |
 | 2026-03-29 | v0.8.0 | SaaS 后端架构重构完成：Worker 系统 (5 Worker + mpsc 异步调度)，声明式 Scheduler (TOML 配置)，SQL 迁移系统 (Schema v6 + TIMESTAMPTZ)，多环境配置 (ZCLAW_ENV)，连接池优化 (50 max/5 min)，速率限制优化 (无锁 AtomicU32)；记忆闭环修复：extraction_adapter.rs 实现 TauriExtractionDriver，BREAK-01 已修复 |
 | 2026-03-29 | v0.7.0 | 文档同步：SKILL 数量 70, Tauri 命令 130+ (含 Browser/Intelligence/Memory/CLI/SecureStorage), Hands 11 (9 启用+2 禁用), 智能层完成度修正 |