diff --git a/frontend/src/components/TaskTree/TaskFlowView.tsx b/frontend/src/components/TaskTree/TaskFlowView.tsx
index e8791dd..332c59e 100644
--- a/frontend/src/components/TaskTree/TaskFlowView.tsx
+++ b/frontend/src/components/TaskTree/TaskFlowView.tsx
@@ -164,9 +164,14 @@ export const TaskFlowView = memo(function TaskFlowView({ tasks, onAction, curren
   // 🚀 焦点模式 vs 全景模式：共用同一套垂直时间线布局，仅数据过滤不同
   const visibleMains = useMemo(() => {
     if (showFullMap) return allMains;
-    // 焦点模式：过滤掉已完成/已入库的历史主线，保留活跃主线 + 所有协助分支
-    return allMains.filter(t => active(t.status));
-  }, [allMains, showFullMap]);
+    // 焦点模式：保留自身活跃的主线，或含活跃分支（后代）的主线，
+    // 避免「主线已完成、但并发协助分支仍在进行中」时整条分支被错误隐藏
+    const hasActiveDescendant = (node: TaskResponse): boolean => {
+      const kids = childMap[node.id] || [];
+      return kids.some(k => active(k.status) || hasActiveDescendant(k));
+    };
+    return allMains.filter(t => active(t.status) || hasActiveDescendant(t));
+  }, [allMains, childMap, showFullMap]);
 
   return (
     <div>
diff --git a/frontend/src/pages/admin/AdminTasksPage.tsx b/frontend/src/pages/admin/AdminTasksPage.tsx
index 358d347..301dbe1 100644
--- a/frontend/src/pages/admin/AdminTasksPage.tsx
+++ b/frontend/src/pages/admin/AdminTasksPage.tsx
@@ -412,12 +412,15 @@ export default function AdminTasksPage() {
                             {/* 最新动态 */}
                             <div className="col-span-2 text-xs">
                               {p.latest_record_time ? (
-                                <Tooltip title={(p.latest_record_content || "") + (p.latest_record_has_images ? " [含图片]" : "")}>
+                                <Tooltip title={(p.latest_record_assignee_name ? `${p.latest_record_assignee_name}: ` : "") + (p.latest_record_content || "") + (p.latest_record_has_images ? " [含图片]" : "")}>
                                   <div className="cursor-default">
                                     <div className="text-[10px] text-gray-400">{new Date(p.latest_record_time).toLocaleString("zh-CN", { month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit" })}</div>
                                     <div className="mt-0.5 flex items-center gap-1 truncate text-[11px] text-gray-600">
                                       {p.latest_record_has_images && <span className="shrink-0">📷</span>}
-                                      <span className="truncate">{p.latest_record_content || (p.latest_record_has_images ? "图片记录" : "—")}</span>
+                                      <span className="truncate">
+                                        {p.latest_record_assignee_name && <span className="font-medium text-gray-700">{p.latest_record_assignee_name}: </span>}
+                                        {p.latest_record_content || (p.latest_record_has_images ? "图片记录" : "—")}
+                                      </span>
                                     </div>
                                   </div>
                                 </Tooltip>
diff --git a/frontend/src/types/admin.ts b/frontend/src/types/admin.ts
index fea9af6..d8a253f 100644
--- a/frontend/src/types/admin.ts
+++ b/frontend/src/types/admin.ts
@@ -21,6 +21,8 @@ export interface ProductResponse {
   latest_record_time: string | null;
   latest_record_content: string | null;
   latest_record_has_images: boolean;
+  latest_record_assignee_id: string | null;
+  latest_record_assignee_name: string | null;
 }
 
 /** MOM 物料选项 */