feat(xdfx): 行动分析聊天记录按行动id划分 + 首问追加 action_id

xdfx 单智能体问答不再按 task_id 划分聊天记录，改按「行动id（action_id）」划分：
- TaskContext 增加 partitionByAction 标记 + taskThreadMetadata 统一产出线程标签
- xdfx 新建线程额外打 metadata.actionId，对话列表按 actionId(+agent_id) 过滤
- 仍保留 metadata.taskId 以维持后端「任务深链对话全局共享」语义
- 首次提问开场信息追加「行动id（action_id）为…」
- useTaskThreads 增加 actionId 过滤参数；useChatsBase 从上下文派生
rwfx / 3qfx 行为不变。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/strategy-components/components/task-components/TaskFxWorkspace.tsx

@@ -46,11 +46,19 @@ import AgentChatPage from "@/pages/AgentChatPage";
 import { ChatRuntime } from "@/pages/WorkspaceRoutes";
 import { TaskJumpBar } from "@/strategy-components/components/task-components/TaskJumpBar";
 
-function useChatsBase(taskBase: string): { taskId: string; agentId: string; chatsBase: string } {
+function useChatsBase(taskBase: string): {
+  taskId: string;
+  agentId: string;
+  /** xdfx（partitionByAction）：按「行动id」划分聊天记录用；其它业务为 ""（仍按 taskId 划分）。 */
+  actionId: string;
+  chatsBase: string;
+} {
   const { agent_id } = useParams<{ agent_id: string }>();
   const agentId = agent_id ?? "";
-  const taskId = readTaskContext()?.taskId ?? "";
-  return { taskId, agentId, chatsBase: `${taskBase}/agent/${agentId}/chats` };
+  const ctx = readTaskContext();
+  const taskId = ctx?.taskId ?? "";
+  const actionId = ctx?.partitionByAction ? (ctx.actionId ?? "") : "";
+  return { taskId, agentId, actionId, chatsBase: `${taskBase}/agent/${agentId}/chats` };
 }
 
 /**
@@ -142,19 +150,22 @@ function parseThreadId(pathname: string, chatsBase: string): string | null {
 function TaskConversationsList({
   taskId,
   agentId,
+  actionId,
   chatsBase,
   business,
   lite,
 }: {
   taskId: string;
   agentId: string;
+  /** xdfx：按「行动id」划分聊天记录；其它业务为 ""。 */
+  actionId: string;
   chatsBase: string;
   business: TaskBusiness;
   lite?: boolean;
 }) {
   const { pathname } = useLocation();
   const navigate = useNavigate();
-  const { threads, isLoading } = useTaskThreads(taskId, agentId);
+  const { threads, isLoading } = useTaskThreads(taskId, agentId, actionId);
   const currentThreadId = useMemo(() => parseThreadId(pathname, chatsBase), [pathname, chatsBase]);
   const businessName = desensitize(TASK_BUSINESSES.find((b) => b.code === business)?.name ?? "");
 
@@ -371,13 +382,14 @@ export function TaskFxWorkspace({
   business: TaskBusiness;
   lite?: boolean;
 }) {
-  const { taskId, agentId, chatsBase } = useChatsBase(taskBase);
+  const { taskId, agentId, actionId, chatsBase } = useChatsBase(taskBase);
   return (
     <div className="flex size-full min-h-0 flex-col overflow-hidden">
       <div className="flex min-h-0 flex-1 overflow-hidden">
         <TaskConversationsList
           taskId={taskId}
           agentId={agentId}
+          actionId={actionId}
           chatsBase={chatsBase}
           business={business}
           lite={lite}
@@ -395,9 +407,9 @@ export function TaskFxWorkspace({
 
 /** chats 索引：有历史对话 → 跳最新；否则 → 跳 new（rwfx 走闸门 / 3qfx/xdfx 直接带开场信息）。 */
 export function TaskFxIndexResolver({ taskBase }: { taskBase: string }) {
-  const { taskId, agentId, chatsBase } = useChatsBase(taskBase);
+  const { taskId, agentId, actionId, chatsBase } = useChatsBase(taskBase);
   const navigate = useNavigate();
-  const { isLoading, hasThreads, latestThreadId } = useTaskThreads(taskId, agentId);
+  const { isLoading, hasThreads, latestThreadId } = useTaskThreads(taskId, agentId, actionId);
 
   useEffect(() => {
     if (isLoading) return;