feat: 更新 load_messages_for_topic 方法，支持按 session_id 过滤消息

src/gateway/processor.rs

@@ -323,7 +323,7 @@ impl InboundProcessor {
                                 tokio::spawn(async move {
                                     // 从 DB 查询该 topic 的第一条用户消息作为描述生成的依据
                                     let first_user_message = store_clone
-                                        .load_messages_for_topic(&topic_id_clone)
+                                        .load_messages_for_topic(&topic_id_clone, None)
                                         .ok()
                                         .and_then(|msgs| msgs.into_iter().find(|m| m.role == "user"))
                                         .map(|m| m.content);

src/gateway/session.rs

@@ -274,10 +274,11 @@ impl Session {
         // 先设置当前话题（set_history 需要这个）
         self.history.set_chat_topic(chat_id, topic_id.to_string());
 
-        // 加载新话题的历史
+        // 加载新话题的历史（按 session_id 过滤，排除子智能体消息）
+        let session_id = self.persistent_session_id(chat_id);
         let messages = self
             .store
-            .load_messages_for_topic(topic_id)
+            .load_messages_for_topic(topic_id, Some(&session_id))
             .map_err(|e| AgentError::Other(format!("load topic messages error: {}", e)))?;
 
         self.history.set_history(chat_id, messages);
@@ -464,11 +465,12 @@ impl Session {
     }
 
     pub(crate) fn reload_chat_history(&mut self, chat_id: &str) -> Result<(), AgentError> {
-        // 如果当前有 topic，加载该 topic 的消息
+        // 如果当前有 topic，加载该 topic 的消息（按 session_id 过滤，排除子智能体消息）
         if let Some(topic_id) = self.history.chat_topic(chat_id) {
+            let session_id = self.persistent_session_id(chat_id);
             let messages = self
                 .store
-                .load_messages_for_topic(topic_id)
+                .load_messages_for_topic(topic_id, Some(&session_id))
                 .map_err(|e| AgentError::Other(format!("load topic messages error: {}", e)))?;
             self.history.set_history(chat_id, messages);
         } else {

src/gateway/session_history.rs

@@ -66,8 +66,9 @@ impl SessionHistory {
 
         // 如果提供了 topic_id，按 topic 加载；否则按 session 加载
         let history = if let Some(tid) = topic_id {
+            let sid = self.persistent_session_id(chat_id);
             self.conversations
-                .load_messages_for_topic(tid)
+                .load_messages_for_topic(tid, Some(&sid))
                 .map_err(|err| AgentError::Other(format!("session history load error: {}", err)))?
         } else {
             self.conversations

src/gateway/ws.rs

@@ -637,12 +637,12 @@ fn resolve_ws_sender_id(sender_id: Option<&str>, runtime_session_id: &str) -> St
 /// 加载并发送话题历史消息
 async fn send_topic_history(
     store: &Arc<crate::storage::SessionStore>,
-    _session_id: &str,
+    session_id: &str,
     topic_id: &str,
     sender: &mpsc::Sender<WsOutbound>,
 ) -> Result<(), Box<dyn std::error::Error>> {
-    // 加载话题消息
+    // 加载话题消息，按 session_id 过滤，避免混入子智能体消息
-    let messages = store.load_messages_for_topic(topic_id)?;
+    let messages = store.load_messages_for_topic(topic_id, Some(session_id))?;
 
     tracing::info!(topic_id = %topic_id, message_count = messages.len(), "Sending topic history");
 

src/storage/mod.rs

@@ -1412,8 +1412,29 @@ impl SessionStore {
         load_messages_after(&conn, session_id, 0)
     }
 
-    pub fn load_messages_for_topic(&self, topic_id: &str) -> Result<Vec<ChatMessage>, StorageError> {
+    pub fn load_messages_for_topic(
+        &self,
+        topic_id: &str,
+        session_id: Option<&str>,
+    ) -> Result<Vec<ChatMessage>, StorageError> {
         let conn = self.pool.get()?;
+
+        if let Some(sid) = session_id {
+            let mut stmt = conn.prepare(
+                "
+                SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
+                FROM messages
+                WHERE topic_id = ?1 AND session_id = ?2
+                ORDER BY seq ASC
+                ",
+            )?;
+            let rows = stmt.query_map(params![topic_id, sid], map_chat_message_row)?;
+            let mut messages = Vec::new();
+            for row in rows {
+                messages.push(row?);
+            }
+            Ok(messages)
+        } else {
             let mut stmt = conn.prepare(
                 "
                 SELECT id, role, content, system_context, reasoning_content, media_refs_json, created_at, tool_call_id, tool_name, tool_calls_json, tool_duration_ms
@@ -1422,56 +1443,18 @@ impl SessionStore {
                 ORDER BY seq ASC
                 ",
             )?;
-
+            let rows = stmt.query_map(params![topic_id], map_chat_message_row)?;
-        let rows = stmt.query_map(params![topic_id], |row| {
-            let media_refs_json: String = row.get(5)?;
-            let media_refs: Vec<String> = serde_json::from_str(&media_refs_json).map_err(|err| {
-                rusqlite::Error::FromSqlConversionFailure(
-                    media_refs_json.len(),
-                    rusqlite::types::Type::Text,
-                    Box::new(err),
-                )
-            })?;
-
-            let tool_calls_json: Option<String> = row.get(9)?;
-            let tool_calls = tool_calls_json
-                .as_deref()
-                .map(serde_json::from_str)
-                .transpose()
-                .map_err(|err| {
-                    rusqlite::Error::FromSqlConversionFailure(
-                        9,
-                        rusqlite::types::Type::Text,
-                        Box::new(err),
-                    )
-                })?;
-
-            Ok(ChatMessage {
-                id: row.get(0)?,
-                role: row.get(1)?,
-                content: row.get(2)?,
-                system_context: row.get(3)?,
-                reasoning_content: row.get(4)?,
-                media_refs,
-                timestamp: row.get(6)?,
-                tool_call_id: row.get(7)?,
-                tool_name: row.get(8)?,
-                tool_state: None,
-                tool_duration_ms: row.get::<_, Option<i64>>(10)?.map(|v| v as u64),
-                tool_calls,
-            })
-        })?;
-
             let mut messages = Vec::new();
             for row in rows {
                 messages.push(row?);
             }
             Ok(messages)
         }
+    }
 
     /// 获取指定话题的消息数量（动态计算，确保准确）
     pub fn get_topic_message_count(&self, topic_id: &str) -> Result<usize, StorageError> {
-        self.load_messages_for_topic(topic_id).map(|msgs| msgs.len())
+        self.load_messages_for_topic(topic_id, None).map(|msgs| msgs.len())
     }
 
     pub fn load_all_messages(&self, session_id: &str) -> Result<Vec<ChatMessage>, StorageError> {
@@ -1673,6 +1656,45 @@ fn map_skill_event_record(row: &rusqlite::Row<'_>) -> rusqlite::Result<SkillEven
     })
 }
 
+fn map_chat_message_row(row: &rusqlite::Row<'_>) -> rusqlite::Result<ChatMessage> {
+    let media_refs_json: String = row.get(5)?;
+    let media_refs: Vec<String> = serde_json::from_str(&media_refs_json).map_err(|err| {
+        rusqlite::Error::FromSqlConversionFailure(
+            media_refs_json.len(),
+            rusqlite::types::Type::Text,
+            Box::new(err),
+        )
+    })?;
+
+    let tool_calls_json: Option<String> = row.get(9)?;
+    let tool_calls = tool_calls_json
+        .as_deref()
+        .map(serde_json::from_str)
+        .transpose()
+        .map_err(|err| {
+            rusqlite::Error::FromSqlConversionFailure(
+                9,
+                rusqlite::types::Type::Text,
+                Box::new(err),
+            )
+        })?;
+
+    Ok(ChatMessage {
+        id: row.get(0)?,
+        role: row.get(1)?,
+        content: row.get(2)?,
+        system_context: row.get(3)?,
+        reasoning_content: row.get(4)?,
+        media_refs,
+        timestamp: row.get(6)?,
+        tool_call_id: row.get(7)?,
+        tool_name: row.get(8)?,
+        tool_state: None,
+        tool_duration_ms: row.get::<_, Option<i64>>(10)?.map(|v| v as u64),
+        tool_calls,
+    })
+}
+
 fn map_memory_record(row: &rusqlite::Row<'_>) -> rusqlite::Result<MemoryRecord> {
     Ok(MemoryRecord {
         id: row.get(0)?,

src/storage/ports.rs

@@ -22,7 +22,11 @@ pub trait ConversationRepository: Send + Sync + 'static {
 
     fn load_messages(&self, session_id: &str) -> Result<Vec<ChatMessage>, StorageError>;
 
-    fn load_messages_for_topic(&self, topic_id: &str) -> Result<Vec<ChatMessage>, StorageError>;
+    fn load_messages_for_topic(
+        &self,
+        topic_id: &str,
+        session_id: Option<&str>,
+    ) -> Result<Vec<ChatMessage>, StorageError>;
 
     fn append_message(&self, session_id: &str, message: &ChatMessage) -> Result<(), StorageError>;
 
@@ -180,8 +184,12 @@ impl ConversationRepository for super::SessionStore {
         super::SessionStore::load_messages(self, session_id)
     }
 
-    fn load_messages_for_topic(&self, topic_id: &str) -> Result<Vec<ChatMessage>, StorageError> {
+    fn load_messages_for_topic(
-        super::SessionStore::load_messages_for_topic(self, topic_id)
+        &self,
+        topic_id: &str,
+        session_id: Option<&str>,
+    ) -> Result<Vec<ChatMessage>, StorageError> {
+        super::SessionStore::load_messages_for_topic(self, topic_id, session_id)
     }
 
     fn append_message(&self, session_id: &str, message: &ChatMessage) -> Result<(), StorageError> {