diff --git a/frontend/src/components/TaskTree/TaskFlowView.tsx b/frontend/src/components/TaskTree/TaskFlowView.tsx
index 2dd6834..3813d18 100644
--- a/frontend/src/components/TaskTree/TaskFlowView.tsx
+++ b/frontend/src/components/TaskTree/TaskFlowView.tsx
@@ -102,10 +102,10 @@ export const TaskFlowView = memo(function TaskFlowView({ tasks, onAction, curren
   const { allMains, childMap } = useMemo(() => {
     ALL_TASKS.clear(); if (tasks.length) collectAll(tasks);
     const all = Array.from(ALL_TASKS);
-    // 🔧 仅收集根级主干节点（parent_task_id IS NULL），杜绝 TRANSFER 子节点双重渲染
+    // 🚀 收集所有主线任务（全部进入中央垂直主轴）
     const mains: TaskResponse[] = [];
     for (const t of all) {
-      if (!t.parent_task_id && isMain(t)) mains.push(t);
+      if (isMain(t)) mains.push(t);
     }
     mains.sort((a, b) => new Date(a.created_at).getTime() - new Date(b.created_at).getTime());
     // 🚀 构建全局 childMap（按 parent_task_id 索引直接子节点，保留真实树结构）
@@ -162,7 +162,8 @@ export const TaskFlowView = memo(function TaskFlowView({ tasks, onAction, curren
       {/* ─── 统一垂直时间线布局（焦点/全景共用） ─── */}
       <div className="space-y-6">
         {visibleMains.map(mainTask => {
-          const directChildren = childMap[mainTask.id] || [];
+          // 🔧 侧翼严格过滤：主线归主轴，仅 SPAWN 协助分支进入左右翼
+          const directChildren = (childMap[mainTask.id] || []).filter(c => !isMain(c));
           const hasLegacyActive = directChildren.some(c => !isMain(c) && !active(mainTask.status));
           const leftDirect = directChildren.filter((_, i) => i % 2 === 0);
           const rightDirect = directChildren.filter((_, i) => i % 2 === 1);