diff --git a/apps/desktop/src/commands.rs b/apps/desktop/src/commands.rs
index 2dfa5ee..2c184dd 100644
--- a/apps/desktop/src/commands.rs
+++ b/apps/desktop/src/commands.rs
@@ -458,12 +458,12 @@ pub async fn chat_send(
     app: AppHandle,
     state: State<'_, App>,
     payload: ChatSendPayload,
-) -> Result<(), String> {
+) -> Result<serde_json::Value, String> {
     let core = state.core.clone();
     let engine = state.engine.clone();
     let base = state.engine_base.clone();
 
-    let (history, model, engine_bin) = {
+    let (history, model, engine_bin, user_message_id) = {
         let db = core.db.lock().unwrap();
         if sessions_db::get_conversation(&db, &payload.conversation_id)
             .map_err(|e| e.to_string())?
@@ -479,7 +479,7 @@ pub async fn chat_send(
             )
             .map_err(|e| e.to_string())?;
         }
-        sessions_db::add_message(
+        let user_message_id = sessions_db::add_message(
             &db,
             &payload.conversation_id,
             "user",
@@ -508,7 +508,7 @@ pub async fn chat_send(
         let bin = settings_db::get(&db, "engine_bin")
             .map_err(|e| e.to_string())?
             .unwrap_or_default();
-        (history, model, bin)
+        (history, model, bin, user_message_id)
     };
 
     let conversation_id = payload.conversation_id.clone();
@@ -523,13 +523,16 @@ pub async fn chat_send(
         core,
         engine,
         base,
-        conversation_id,
+        conversation_id.clone(),
         history,
         model,
         engine_bin,
         payload.params,
     ));
-    Ok(())
+    Ok(serde_json::json!({
+        "conversation_id": conversation_id,
+        "message_id": user_message_id,
+    }))
 }
 
 /// 统一的生成与流式转发：支持本地引擎 / 远程 API，统计首字延迟、token 数与耗时。
diff --git a/ui/src/api.ts b/ui/src/api.ts
index bf44df6..a1712b6 100644
--- a/ui/src/api.ts
+++ b/ui/src/api.ts
@@ -188,7 +188,8 @@ export const api = {
     invoke<void>("deploy_model", { modelId, params }),
   engineStop: () => invoke<void>("engine_stop"),
   engineStatus: () => invoke<EngineStatus>("engine_status"),
-  chatSend: (payload: ChatSendPayload) => invoke<string>("chat_send", { payload }),
+  chatSend: (payload: ChatSendPayload) =>
+    invoke<{ conversation_id: string; message_id: string }>("chat_send", { payload }),
   regenerateMessage: (
     conversationId: string,
     messageId: string,
diff --git a/ui/src/pages/ChatPage.tsx b/ui/src/pages/ChatPage.tsx
index 7798f06..a6c39d3 100644
--- a/ui/src/pages/ChatPage.tsx
+++ b/ui/src/pages/ChatPage.tsx
@@ -219,21 +219,27 @@ export default function ChatPage() {
       await refreshConversations();
     }
 
+    const tempUserId = `user-${Date.now()}`;
     setMessages((prev) => [
       ...prev,
-      { id: `user-${Date.now()}`, role: "user", content, images },
+      { id: tempUserId, role: "user", content, images },
       { id: `assistant-${Date.now()}`, role: "assistant", content: "", streaming: true },
     ]);
     setStreaming(true);
 
     try {
-      await api.chatSend({
+      const result = await api.chatSend({
         conversation_id: convId,
         model_id: selectedModelId,
         content,
         params,
         images,
       });
+      if (result?.message_id) {
+        setMessages((prev) =>
+          prev.map((m) => (m.id === tempUserId ? { ...m, id: result.message_id } : m)),
+        );
+      }
     } catch (e) {
       setStreaming(false);
       setError(String(e));