diff --git a/web/hwlab-cloud-web/src/components/agents/AgentRunMindMap.vue b/web/hwlab-cloud-web/src/components/agents/AgentRunMindMap.vue
index ee801755..ac616e69 100644
--- a/web/hwlab-cloud-web/src/components/agents/AgentRunMindMap.vue
+++ b/web/hwlab-cloud-web/src/components/agents/AgentRunMindMap.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, nextTick } from "vue";
+import { computed, nextTick, onMounted, ref, watch } from "vue";
 import dagre from "@dagrejs/dagre";
 import { Handle, MarkerType, Position, VueFlow, useVueFlow, type Edge, type Node } from "@vue-flow/core";
 import { Focus, Minus, Plus } from "lucide-vue-next";
@@ -32,23 +32,35 @@ const emit = defineEmits<{
 const flowId = "agentrun-mind-map";
 const { fitView, zoomIn, zoomOut } = useVueFlow({ id: flowId });
 const runById = computed(() => new Map(props.runs.map((run) => [run.id, run])));
+const layoutCache = new Map<string, Map<string, { x: number; y: number }>>();
+const initialFitDone = ref(false);
 
 const graph = computed(() => {
-  const layout = new dagre.graphlib.Graph().setDefaultEdgeLabel(() => ({}));
-  layout.setGraph({ rankdir: "LR", ranksep: 74, nodesep: 24, edgesep: 12, marginx: 32, marginy: 32 });
-
-  for (const row of props.rows) layout.setNode(row.id, { width: nodeWidth(row), height: 70 });
-  for (const row of props.rows) if (row.parentId && layout.hasNode(row.parentId)) layout.setEdge(row.parentId, row.id);
-  dagre.layout(layout);
+  // 状态和消息更新只刷新节点内容，不重新计算位置。
+  const layoutKey = props.rows.map((row) => `${row.id}|${row.parentId ?? ""}|${row.kind}|${row.childCount}|${row.expanded}`).join("\n");
+  let positions = layoutCache.get(layoutKey);
+  if (!positions) {
+    const layout = new dagre.graphlib.Graph().setDefaultEdgeLabel(() => ({}));
+    layout.setGraph({ rankdir: "LR", ranksep: 74, nodesep: 24, edgesep: 12, marginx: 32, marginy: 32 });
+    for (const row of props.rows) layout.setNode(row.id, { width: nodeWidth(row), height: 70 });
+    for (const row of props.rows) if (row.parentId && layout.hasNode(row.parentId)) layout.setEdge(row.parentId, row.id);
+    dagre.layout(layout);
+    positions = new Map(props.rows.map((row) => {
+      const position = layout.node(row.id);
+      return [row.id, { x: position.x - position.width / 2, y: position.y - position.height / 2 }];
+    }));
+    layoutCache.set(layoutKey, positions);
+    if (layoutCache.size > 8) layoutCache.delete(layoutCache.keys().next().value!);
+  }
 
   const nodes: Node<MindMapNodeData>[] = props.rows.map((row) => {
-    const position = layout.node(row.id);
+    const position = positions.get(row.id) ?? { x: 0, y: 0 };
     const run = row.runId ? runById.value.get(row.runId) : undefined;
     const title = row.kind === "run" && run?.title ? run.title : row.label;
     return {
       id: row.id,
       type: "observer",
-      position: { x: position.x - position.width / 2, y: position.y - position.height / 2 },
+      position,
       sourcePosition: Position.Right,
       targetPosition: Position.Left,
       selectable: false,
@@ -57,7 +69,7 @@ const graph = computed(() => {
     };
   });
   const edges: Edge[] = props.rows
-    .filter((row) => row.parentId && layout.hasNode(row.parentId))
+    .filter((row) => row.parentId && positions.has(row.parentId))
     .map((row) => ({
       id: `${row.parentId}->${row.id}`,
       source: row.parentId!,
@@ -89,6 +101,15 @@ async function fit(): Promise<void> {
   await nextTick();
   await fitView({ padding: 0.14, duration: 220, maxZoom: 1 });
 }
+
+async function fitInitial(): Promise<void> {
+  if (initialFitDone.value || !props.rows.length) return;
+  await fit();
+  initialFitDone.value = true;
+}
+
+watch(() => graph.value.nodes.length, () => { void fitInitial(); }, { flush: "post" });
+onMounted(() => { void fitInitial(); });
 </script>
 
 <template>
@@ -103,7 +124,7 @@ async function fit(): Promise<void> {
       :nodes-draggable="false"
       :nodes-connectable="false"
       :elements-selectable="false"
-      fit-view-on-init
+      :fit-view-on-init="false"
       class="agent-mind-map-flow"
       aria-label="AgentRun 思维导图"
     >