feat: 子代理 todo 列表支持 — 进入子代理视图时显示子代理的待办

- SubAgentEmitter 添加 todo_write 持久化（照搬 BusToolCallEmitter 模式）
- DefaultSubAgentRuntime 加 store 字段，透传给 emitter
- Command::ListTodos 加 task_id 参数
- list_todos handler: 当 task_id 存在时，scope_key = sub:{parent}:{task_id}
- 前端: 子代理视图下自动带 task_id 请求子代理的 todo

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/command/handlers/list_todos.rs

@@ -20,7 +20,7 @@ impl ListTodosCommandHandler {
 #[async_trait]
 impl CommandHandler for ListTodosCommandHandler {
     fn can_handle(&self, cmd: &Command) -> bool {
-        matches!(cmd, Command::ListTodos)
+        matches!(cmd, Command::ListTodos { .. })
     }
 
     fn metadata(&self) -> Option<CommandMetadata> {
@@ -33,25 +33,35 @@ impl CommandHandler for ListTodosCommandHandler {
 
     async fn handle(
         &self,
-        _cmd: Command,
+        cmd: Command,
         ctx: CommandContext,
     ) -> Result<CommandResponse, CommandError> {
-        // scope_key = topic_id.unwrap_or(session_id)
-        let scope_key = ctx
-            .topic_id
-            .as_deref()
-            .filter(|t| !t.is_empty())
-            .or(ctx.session_id.as_deref())
-            .ok_or_else(|| {
-                CommandError::new(
-                    "MISSING_CONTEXT",
-                    "Cannot list todos: no session_id or topic_id in command context",
-                )
-            })?;
+        let task_id = match cmd {
+            Command::ListTodos { task_id } => task_id,
+            _ => None,
+        };
+
+        // 子代理：scope_key = sub:{parent_session_id}:{task_id}
+        // 主代理：scope_key = topic_id.unwrap_or(session_id)
+        let scope_key = if let (Some(tid), Some(parent_sid)) = (task_id.as_deref(), ctx.session_id.as_deref()) {
+            format!("sub:{}:{}", parent_sid, tid)
+        } else {
+            ctx.topic_id
+                .as_deref()
+                .filter(|t| !t.is_empty())
+                .or(ctx.session_id.as_deref())
+                .ok_or_else(|| {
+                    CommandError::new(
+                        "MISSING_CONTEXT",
+                        "Cannot list todos: no session_id or topic_id in command context",
+                    )
+                })?
+                .to_string()
+        };
 
         let records = self
             .store
-            .list_todos(scope_key)
+            .list_todos(&scope_key)
             .map_err(|e| CommandError::new("LIST_TODOS_ERROR", e.to_string()))?;
 
         tracing::info!(
@@ -77,6 +87,6 @@ impl CommandHandler for ListTodosCommandHandler {
 
         Ok(CommandResponse::success(ctx.request_id)
             .with_metadata("todos", &todos_json)
-            .with_metadata("todos_scope_key", scope_key))
+            .with_metadata("todos_scope_key", &scope_key))
     }
 }

src/command/mod.rs

@@ -74,7 +74,11 @@ pub enum Command {
     /// 列出所有技能
     ListSkills,
     /// 列出当前 Todo 列表
-    ListTodos,
+    ListTodos {
+        /// 子代理的 task_id（进入子代理视图时传入）
+        #[serde(default)]
+        task_id: Option<String>,
+    },
 }
 
 impl Command {
@@ -102,7 +106,7 @@ impl Command {
             Command::UpdateMemory { .. } => "update_memory",
             Command::DeleteMemory { .. } => "delete_memory",
             Command::ListSkills => "list_skills",
-            Command::ListTodos => "list_todos",
+            Command::ListTodos { .. } => "list_todos",
         }
     }
 }

src/gateway/runtime.rs

@@ -201,6 +201,7 @@ pub(crate) fn build_session_manager_with_sender(
             provider_config.clone(),
             catalog,
             bus.clone(),
+            store.clone(),
         ));
 
         (factory.with_subagent_runtime(subagent_runtime), task_repository)

src/tools/task/runtime.rs

@@ -12,7 +12,7 @@ use crate::bus::ChatMessage;
 use crate::bus::message::{OutboundMessage, OutboundEventKind};
 use crate::bus::MessageBus;
 use crate::config::{LLMProviderConfig, SubagentsConfig};
-use crate::storage::ConversationRepository;
+use crate::storage::{ConversationRepository, SessionStore};
 use crate::tools::{ToolContext, ToolRegistry};
 
 use super::error::TaskError;
@@ -105,6 +105,8 @@ struct SubAgentEmitter {
     channel_name: String,
     chat_id: String,
     metadata: HashMap<String, String>,
+    store: Arc<SessionStore>,
+    sub_session_id: String,
 }
 
 #[async_trait]
@@ -151,6 +153,57 @@ impl EmittedMessageHandler for SubAgentEmitter {
                 );
             }
         }
+
+        // 拦截 todo_write 结果：持久化到 SQLite（子代理用 session_id 作为 scope_key）
+        if message.tool_name.as_deref() == Some("todo_write") {
+            self.persist_todo_write_result(&message);
+        }
+    }
+}
+
+impl SubAgentEmitter {
+    fn persist_todo_write_result(&self, message: &ChatMessage) {
+        let parsed: serde_json::Value = match serde_json::from_str(&message.content) {
+            Ok(v) => v,
+            Err(_) => return,
+        };
+
+        let Some(todos_array) = parsed.get("current_todos").and_then(|v| v.as_array()) else {
+            return;
+        };
+
+        let scope_key = &self.sub_session_id;
+
+        let records: Vec<crate::storage::TodoRecord> = todos_array
+            .iter()
+            .filter_map(|item| {
+                Some(crate::storage::TodoRecord {
+                    id: item.get("id")?.as_str()?.to_string(),
+                    scope_key: scope_key.clone(),
+                    session_id: scope_key.clone(),
+                    topic_id: None,
+                    content: item.get("content")?.as_str()?.to_string(),
+                    status: item.get("status")?.as_str()?.to_string(),
+                    priority: item.get("priority")?.as_str()?.to_string(),
+                    created_at: item.get("created_at")?.as_i64()?,
+                    updated_at: item.get("updated_at")?.as_i64()?,
+                })
+            })
+            .collect();
+
+        if records.is_empty() {
+            return;
+        }
+
+        tracing::info!(
+            scope_key = %scope_key,
+            todo_count = records.len(),
+            "SubAgentEmitter: persisting todo_write result"
+        );
+
+        if let Err(e) = self.store.replace_todos(scope_key, &records) {
+            tracing::warn!(error = %e, %scope_key, "Failed to persist sub-agent todo list");
+        }
     }
 }
 
@@ -173,6 +226,7 @@ pub struct DefaultSubAgentRuntime {
     /// 子代理定义目录（内置 + 自定义）
     catalog: Arc<SubagentCatalog>,
     bus: Option<Arc<MessageBus>>,
+    store: Arc<SessionStore>,
 }
 
 impl DefaultSubAgentRuntime {
@@ -184,6 +238,7 @@ impl DefaultSubAgentRuntime {
         provider_config: LLMProviderConfig,
         catalog: Arc<SubagentCatalog>,
         bus: Option<Arc<MessageBus>>,
+        store: Arc<SessionStore>,
     ) -> Self {
         Self {
             config,
@@ -193,6 +248,7 @@ impl DefaultSubAgentRuntime {
             provider_config,
             catalog,
             bus,
+            store,
         }
     }
 
@@ -258,6 +314,8 @@ impl DefaultSubAgentRuntime {
                         channel_name: session.parent_channel_name.clone(),
                         chat_id: session.parent_chat_id.clone(),
                         metadata,
+                        store: self.store.clone(),
+                        sub_session_id: session.session_id.clone(),
                     },
                     self.conversation_repository.clone(),
                     session.session_id.clone(),

web/src/App.tsx

@@ -45,6 +45,7 @@ function App() {
     requestSkillList,
     todos,
     requestTodoList,
+    requestSubAgentTodoList,
     // 定时任务
     schedulerJobs,
     sidebarTab,
@@ -342,10 +343,12 @@ function App() {
     const key = `${selectedTopic ?? ''}|${subAgentView?.taskId ?? ''}`
     if (key === prevTodoTriggerRef.current) return
     prevTodoTriggerRef.current = key
-    const todoCmd = requestTodoList()
+    const todoCmd = subAgentView?.taskId
+      ? requestSubAgentTodoList(subAgentView.taskId)
+      : requestTodoList()
     handleCommand(todoCmd)
     sendMessage({ type: 'command', payload: JSON.stringify(todoCmd) })
-  }, [status, selectedTopic, subAgentView, handleCommand, sendMessage, requestTodoList])
+  }, [status, selectedTopic, subAgentView, handleCommand, sendMessage, requestTodoList, requestSubAgentTodoList])
 
   const handleRefreshMemories = useCallback(() => {
     const cmd = requestMemoryList()

web/src/hooks/useChat.ts

@@ -97,6 +97,7 @@ interface UseChatReturn {
   // Todo 状态
   todos: TodoItemSummary[]
   requestTodoList: () => Command
+  requestSubAgentTodoList: (subTaskId: string) => Command
 
   // 定时任务状态
   schedulerJobs: SchedulerJobSummary[]
@@ -766,6 +767,10 @@ export function useChat(): UseChatReturn {
     return { type: 'list_todos' }
   }, [])
 
+  const requestSubAgentTodoList = useCallback((subTaskId: string): Command => {
+    return { type: 'list_todos', task_id: subTaskId }
+  }, [])
+
   // 定时任务方法
   const requestSchedulerJobList = useCallback((): Command => {
     return { type: 'list_scheduler_jobs' }
@@ -856,6 +861,7 @@ export function useChat(): UseChatReturn {
     requestSkillList,
     todos,
     requestTodoList,
+    requestSubAgentTodoList,
     schedulerJobs,
     sidebarTab,
     setSidebarTab,

web/src/types/protocol.ts

@@ -390,6 +390,7 @@ export interface ListSkillsCommand {
 
 export interface ListTodosCommand {
   type: 'list_todos'
+  task_id?: string
 }
 
 export type Command =