diff --git a/easyflow-ui-admin/app/src/views/ai/agents/AgentDesigner.vue b/easyflow-ui-admin/app/src/views/ai/agents/AgentDesigner.vue
index dffb17c9..217400ad 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/AgentDesigner.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agents/AgentDesigner.vue
@@ -9,7 +9,8 @@ import type {
 import { computed, onActivated, onDeactivated, onMounted, ref } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 
-import { ElMessage, ElMessageBox } from 'element-plus';
+import { ArrowLeft } from '@element-plus/icons-vue';
+import { ElButton, ElMessage, ElMessageBox } from 'element-plus';
 import { tryit } from 'radash';
 
 import { api } from '#/api/request';
@@ -502,10 +503,22 @@ function handleTryout() {
 function handleCloseTryout() {
   selectBase();
 }
+
+function handleBack() {
+  router.push(AGENT_TAB_PAGE_KEY);
+}
 </script>
 
 <template>
   <div v-loading="pageLoading" class="agent-designer">
+    <ElButton
+      class="agent-designer__back"
+      :icon="ArrowLeft"
+      aria-label="返回智能体列表"
+      @click="handleBack"
+    >
+      返回智能体列表
+    </ElButton>
     <template v-if="contentReady">
       <AgentStudioCanvas
         :active="canvasActive"
@@ -566,4 +579,13 @@ function handleCloseTryout() {
     ),
     var(--el-fill-color-extra-light);
 }
+
+.agent-designer__back {
+  position: absolute;
+  top: var(--space-6);
+  left: var(--space-6);
+  z-index: 10;
+  border-radius: var(--radius-control);
+  box-shadow: var(--shadow-subtle);
+}
 </style>
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentToolForm.vue b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentToolForm.vue
index 85c54018..925c220b 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/components/AgentToolForm.vue
+++ b/easyflow-ui-admin/app/src/views/ai/agents/components/AgentToolForm.vue
@@ -82,11 +82,14 @@ const selectedMcpToolCount = computed(() => selectedMcpTools.value.length);
 
 const asyncExecutionEnabled = computed({
   get() {
-    return String(props.binding.optionsJson?.executionMode || '').toUpperCase() === 'ASYNC';
+    return (
+      String(props.binding.optionsJson?.executionMode || '').toUpperCase() ===
+      'ASYNC'
+    );
   },
   set(value: boolean) {
     props.binding.optionsJson = {
-      ...(props.binding.optionsJson || {}),
+      ...props.binding.optionsJson,
       executionMode: value ? 'ASYNC' : 'SYNC',
     };
     emit('change');
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.test.ts b/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.test.ts
index 55b3ff29..9c5bdc8d 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.test.ts
+++ b/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.test.ts
@@ -31,3 +31,42 @@ describe('useAgentDesignerState generation stream', () => {
     );
   });
 });
+
+describe('useAgentDesignerState memory compression', () => {
+  it('keeps only token-based compression settings in state and payload', () => {
+    expect(
+      createEmptyAgent().memoryConfigJson?.compressionParameter,
+    ).not.toHaveProperty('msgThreshold');
+
+    const designer = useAgentDesignerState();
+    designer.reset({
+      name: '旧压缩配置智能体',
+      memoryConfigJson: {
+        maxAttachedMessageCount: 12,
+        compressionParameter: {
+          enabled: true,
+          msgThreshold: 12,
+          lastKeep: 6,
+          minCompressionTokenThreshold: 128_000,
+        },
+      },
+    });
+
+    const stateCompressionParameter =
+      designer.state.agent.memoryConfigJson?.compressionParameter;
+    expect(stateCompressionParameter).not.toHaveProperty('msgThreshold');
+    expect(stateCompressionParameter?.lastKeep).toBe(6);
+    expect(stateCompressionParameter?.minCompressionTokenThreshold).toBe(
+      128_000,
+    );
+
+    const payloadMemoryConfig = designer.buildPayloadAgent().memoryConfigJson;
+    expect(payloadMemoryConfig).not.toHaveProperty('maxAttachedMessageCount');
+    expect(payloadMemoryConfig?.compressionParameter).not.toHaveProperty(
+      'msgThreshold',
+    );
+    expect(
+      payloadMemoryConfig?.compressionParameter.minCompressionTokenThreshold,
+    ).toBe(128_000);
+  });
+});
diff --git a/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.ts b/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.ts
index 5384568f..91e330cb 100644
--- a/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.ts
+++ b/easyflow-ui-admin/app/src/views/ai/agents/composables/useAgentDesignerState.ts
@@ -76,6 +76,14 @@ function normalizeBindingToolName(binding: AgentToolBinding) {
   return resolveToolName(kind, resource);
 }
 
+function tokenOnlyCompressionParameter(
+  parameter?: Record<string, any>,
+): Record<string, any> {
+  const normalized = { ...parameter };
+  delete normalized.msgThreshold;
+  return normalized;
+}
+
 export function createEmptyAgent(): AgentInfo {
   return {
     name: '未命名智能体',
@@ -88,7 +96,6 @@ export function createEmptyAgent(): AgentInfo {
     memoryConfigJson: {
       compressionParameter: {
         enabled: true,
-        msgThreshold: 12,
         lastKeep: 8,
         minCompressionTokenThreshold: 6000,
       },
@@ -101,10 +108,11 @@ export function createEmptyAgent(): AgentInfo {
 function normalizeAgent(agent?: AgentInfo): AgentInfo {
   const source = agent || {};
   const memoryConfig = source.memoryConfigJson || {};
-  const compressionParameter = memoryConfig.compressionParameter || {};
+  const compressionParameter = tokenOnlyCompressionParameter(
+    memoryConfig.compressionParameter,
+  );
   const defaultCompressionParameter =
     createEmptyAgent().memoryConfigJson?.compressionParameter || {};
-  const legacyMsgThreshold = memoryConfig.maxAttachedMessageCount;
   return {
     ...createEmptyAgent(),
     ...source,
@@ -121,10 +129,6 @@ function normalizeAgent(agent?: AgentInfo): AgentInfo {
       compressionParameter: {
         enabled: true,
         ...compressionParameter,
-        msgThreshold:
-          compressionParameter.msgThreshold ??
-          legacyMsgThreshold ??
-          defaultCompressionParameter.msgThreshold,
         lastKeep:
           compressionParameter.lastKeep ?? defaultCompressionParameter.lastKeep,
         minCompressionTokenThreshold:
@@ -353,9 +357,13 @@ export function useAgentDesignerState() {
 
   function buildPayloadAgent(): AgentInfo {
     const memoryConfigJson = state.agent.memoryConfigJson || {};
-    const compressionParameter = memoryConfigJson.compressionParameter || {};
-    const { maxAttachedMessageCount, ...restMemoryConfigJson } =
-      memoryConfigJson;
+    const compressionParameter = tokenOnlyCompressionParameter(
+      memoryConfigJson.compressionParameter,
+    );
+    const {
+      maxAttachedMessageCount: _maxAttachedMessageCount,
+      ...restMemoryConfigJson
+    } = memoryConfigJson;
     return {
       ...state.agent,
       interactionConfigJson: buildInteractionConfigPayload(