Method updateStatus

packages/server/src/services/task.service.ts:472–519

* 更新任务状态（含状态流转校验） * 更新后通过 EventBus 发射 task:updated 事件，通知前端实时更新

(id: string, status: TaskStatus)

      taskId: row.taskId,
      status: row.workspaceStatus,
      workspaceKind: row.workspaceKind,
      branchName: row.branchName,
      agentType: row.agentType,
      hasActiveSession: Boolean(row.hasActiveSession),
    }));

    const workspacesByTaskId = new Map<string, typeof workspaces>();
    for (const workspace of workspaces) {
      const group = workspacesByTaskId.get(workspace.taskId) ?? [];
      group.push(workspace);
      workspacesByTaskId.set(workspace.taskId, group);
    }

    const preferredWorkspaceByTaskId = new Map<string, (typeof workspaces)[number]>();
    for (const task of tasks) {
      const candidates = workspacesByTaskId.get(task.id) ?? [];
      const preferred = candidates.find((workspace) => workspace.status === WorkspaceStatus.ACTIVE)
        ?? candidates[0];
      if (preferred) {
        preferredWorkspaceByTaskId.set(task.id, preferred);
      }
    }

    const statusOrder: Record<string, number> = {
      [TaskStatus.IN_PROGRESS]: 0,
      [TaskStatus.IN_REVIEW]: 1,
      [TaskStatus.TODO]: 2,
      [TaskStatus.DONE]: 3,
      [TaskStatus.CANCELLED]: 4,
    };
    tasks.sort((a, b) => {
      const statusDelta = (statusOrder[a.status] ?? 99) - (statusOrder[b.status] ?? 99);
      if (statusDelta !== 0) return statusDelta;
      return a.position - b.position;
    });

    const data: TaskBoardItem[] = tasks.map((task) => {
      const titlePreview = buildTextPreview(task.title, TASK_TITLE_MAX_LENGTH);
      const preferredWorkspace = preferredWorkspaceByTaskId.get(task.id);
      const hasRunningSession = (workspacesByTaskId.get(task.id) ?? [])
        .some((workspace) => workspace.hasActiveSession);

      return {
        id: task.id,
        projectId: task.projectId,
        title: titlePreview,
        status: task.status as TaskStatus,
        ...(preferredWorkspace ? {
          preferredWorkspace: {
            ...(preferredWorkspace.workspaceKind === WorkspaceKind.MAIN_DIRECTORY
              ? { workspaceKind: WorkspaceKind.MAIN_DIRECTORY }