diff --git a/src/bus/message.rs b/src/bus/message.rs
index d4d2d21..bfadaab 100644
--- a/src/bus/message.rs
+++ b/src/bus/message.rs
@@ -571,7 +571,8 @@ impl OutboundMessage {
             "assistant" => {
                 if let Some(tool_calls) = &message.tool_calls {
                     let mut outbound = Vec::new();
-                    if !message.content.trim().is_empty() {
+                    let has_content_or_reasoning = !message.content.trim().is_empty() || message.reasoning_content.is_some();
+                    if has_content_or_reasoning {
                         let mut resp = Self::assistant(
                             channel.to_string(),
                             chat_id.to_string(),
@@ -585,7 +586,7 @@ impl OutboundMessage {
                     }
 
                     outbound.extend(tool_calls.iter().map(|tool_call| {
-                        Self::tool_call(
+                        let mut tc = Self::tool_call(
                             channel.to_string(),
                             chat_id.to_string(),
                             session_id.clone(),
@@ -594,7 +595,9 @@ impl OutboundMessage {
                             tool_call.arguments.clone(),
                             reply_to.clone(),
                             metadata.clone(),
-                        )
+                        );
+                        tc.reasoning_content = message.reasoning_content.clone();
+                        tc
                     }));
                     outbound
                 } else {
diff --git a/src/gateway/ws.rs b/src/gateway/ws.rs
index 1cacf97..8bc479f 100644
--- a/src/gateway/ws.rs
+++ b/src/gateway/ws.rs
@@ -762,6 +762,7 @@ fn chat_message_to_ws_outbound(msg: &crate::bus::ChatMessage) -> Option<WsOutbou
                         subagent_task_id: None,
                         topic_id: None,
                         timestamp: Some(msg.timestamp / 1000),
+                        reasoning_content: msg.reasoning_content.clone(),
                     });
                 }
             }
diff --git a/src/protocol/mod.rs b/src/protocol/mod.rs
index f780ad5..e46984c 100644
--- a/src/protocol/mod.rs
+++ b/src/protocol/mod.rs
@@ -156,6 +156,8 @@ pub enum WsOutbound {
         topic_id: Option<String>,
         #[serde(default, skip_serializing_if = "Option::is_none")]
         timestamp: Option<i64>,
+        #[serde(default, skip_serializing_if = "Option::is_none")]
+        reasoning_content: Option<String>,
     },
     #[serde(rename = "tool_result")]
     ToolResult {
diff --git a/src/protocol/ws_adapter.rs b/src/protocol/ws_adapter.rs
index a9d5e1d..42c0080 100644
--- a/src/protocol/ws_adapter.rs
+++ b/src/protocol/ws_adapter.rs
@@ -15,7 +15,8 @@ pub(crate) fn ws_outbound_from_chat_message(message: &ChatMessage) -> Vec<WsOutb
         "assistant" => {
             if let Some(tool_calls) = &message.tool_calls {
                 let mut outbound = Vec::new();
-                if !message.content.trim().is_empty() {
+                let has_content_or_reasoning = !message.content.trim().is_empty() || message.reasoning_content.is_some();
+                if has_content_or_reasoning {
                     outbound.push(WsOutbound::AssistantResponse {
                         id: message.id.clone(),
                         content: message.content.clone(),
@@ -38,6 +39,7 @@ pub(crate) fn ws_outbound_from_chat_message(message: &ChatMessage) -> Vec<WsOutb
                     subagent_task_id: None,
                     topic_id: None,
                     timestamp: None,
+                    reasoning_content: message.reasoning_content.clone(),
                 }));
                 outbound
             } else {
@@ -126,6 +128,7 @@ pub(crate) fn ws_outbound_from_outbound_message(message: &OutboundMessage) -> Ve
             subagent_task_id: message.metadata.get("subagent_task_id").cloned(),
             topic_id: message.metadata.get("topic_id").cloned(),
             timestamp: Some(crate::protocol::now_timestamp()),
+            reasoning_content: message.reasoning_content.clone(),
         }],
         OutboundEventKind::ToolResult => vec![WsOutbound::ToolResult {
             id: message
diff --git a/tests/test_request_format.rs b/tests/test_request_format.rs
index 0c39a14..8e41f49 100644
--- a/tests/test_request_format.rs
+++ b/tests/test_request_format.rs
@@ -125,6 +125,7 @@ fn test_tool_call_outbound_serialization() {
         subagent_task_id: None,
         topic_id: None,
         timestamp: None,
+        reasoning_content: None,
     };
 
     let json = serde_json::to_string(&msg).unwrap();
diff --git a/web/src/components/Chat/MessageBubble.tsx b/web/src/components/Chat/MessageBubble.tsx
index f347af9..68e11a8 100644
--- a/web/src/components/Chat/MessageBubble.tsx
+++ b/web/src/components/Chat/MessageBubble.tsx
@@ -242,11 +242,11 @@ function ThinkingSection({ content }: { content: string }) {
   return (
     <div className="mb-3 rounded-lg border border-purple-500/20 bg-purple-500/5 overflow-hidden">
       <button
-        onClick={() => setExpanded(!expanded)}
+        onClick={(e) => { e.stopPropagation(); setExpanded(!expanded) }}
         className="flex items-center gap-2 w-full px-3 py-2 text-xs text-[var(--text-muted)] hover:text-[var(--text-secondary)] hover:bg-purple-500/5 transition-colors cursor-pointer select-none"
       >
         <Brain className="h-3.5 w-3.5 text-purple-400 flex-shrink-0" />
-        <span className="font-medium text-purple-300">思考过程</span>
+        <span className="font-medium text-purple-300">Thinking</span>
         {expanded ? (
           <ChevronDown className="h-3 w-3 ml-auto flex-shrink-0" />
         ) : (
@@ -260,7 +260,7 @@ function ThinkingSection({ content }: { content: string }) {
       </button>
       {expanded && (
         <div className="px-3 py-2 border-t border-purple-500/10 animate-thinking-reveal">
-          <div className="text-xs text-purple-200/80 italic whitespace-pre-wrap leading-relaxed max-h-64 overflow-y-auto scrollbar-thin">
+          <div className="text-xs text-purple-200/80 whitespace-pre-wrap leading-relaxed max-h-64 overflow-y-auto scrollbar-thin">
             {content}
           </div>
         </div>
@@ -437,6 +437,12 @@ export function MessageBubble({ message, onNavigateToSubAgent }: MessageBubblePr
               </span>
             </div>
 
+            {/* 模型思考内容（工具调用时展示） */}
+            {message.reasoningContent && !toolExpanded && (
+              <div className="px-3 pb-1">
+                <ThinkingSection content={message.reasoningContent} />
+              </div>
+            )}
             {/* Collapsed preview */}
             {!toolExpanded && (
               <>
@@ -495,6 +501,10 @@ export function MessageBubble({ message, onNavigateToSubAgent }: MessageBubblePr
             {/* Expanded */}
             {toolExpanded && (
               <div className="border-t border-[var(--border-color)] px-3 py-2 space-y-2">
+                {/* 模型思考内容（展开时也展示） */}
+                {message.reasoningContent && (
+                  <ThinkingSection content={message.reasoningContent} />
+                )}
                 {taskResult ? (
                   <>
                     {taskPrompt && (
@@ -646,7 +656,7 @@ export function MessageBubble({ message, onNavigateToSubAgent }: MessageBubblePr
             {!isTool && message.reasoningContent && (
               <ThinkingSection content={message.reasoningContent} />
             )}
-            // AI 和工具消息使用 Markdown 渲染
+            {/* AI 和工具消息使用 Markdown 渲染 */}
             <div className="markdown-content text-sm leading-relaxed">
               <ReactMarkdown
                 remarkPlugins={[remarkGfm]}
diff --git a/web/src/hooks/useChat.ts b/web/src/hooks/useChat.ts
index 4694e75..940b424 100644
--- a/web/src/hooks/useChat.ts
+++ b/web/src/hooks/useChat.ts
@@ -210,6 +210,7 @@ export function useChat(): UseChatReturn {
           toolCallId: msg.tool_call_id,
           arguments: msg.arguments,
           subagentTaskId: msg.subagent_task_id,
+          reasoningContent: msg.reasoning_content,
         }
       }
       case 'tool_result': {
@@ -460,6 +461,7 @@ export function useChat(): UseChatReturn {
             toolCallId: msg.tool_call_id,
             arguments: msg.arguments,
             subagentTaskId: msg.subagent_task_id,
+            reasoningContent: msg.reasoning_content,
           },
         ])
         break
diff --git a/web/src/types/protocol.ts b/web/src/types/protocol.ts
index db23870..af9264c 100644
--- a/web/src/types/protocol.ts
+++ b/web/src/types/protocol.ts
@@ -59,6 +59,7 @@ export interface ToolCall {
   subagent_task_id?: string
   topic_id?: string
   timestamp?: number
+  reasoning_content?: string
 }
 
 export interface ToolResult {