fix: 去除API文档重复按钮

docs/project_context.md

@@ -587,3 +587,9 @@
 - The per-row operation dropdown now keeps edit, enable/disable, regenerate, and delete actions; copying is surfaced beside the Token value for faster repeated use.
 - Build verification: `npm run build` passed with only the existing Vite large chunk warning.
 - Follow-up UI adjustment: the eye/copy buttons now sit immediately after the Token text instead of being pushed to the far right, and Token rows show `created_at` in the metadata area.
+
+## 2026-06-01: API documentation toolbar cleanup
+
+- `frontend/src/components/ApiDocs.vue` no longer registers a page-header `copy sample` action, avoiding duplicate `复制传参示例` buttons on the API documentation page.
+- The API documentation card still keeps its local toolbar actions: `复制传参示例` and `OpenAPI JSON`.
+- Verification performed: `npm run build` passed, and generated frontend build output was removed after verification.

frontend/src/components/ApiDocs.vue

@@ -20,13 +20,12 @@
 </template>
 
 <script setup lang="ts">
-import { nextTick, onBeforeUnmount, onMounted, ref } from 'vue';
+import { nextTick, onMounted, ref } from 'vue';
 import { useMessage } from 'naive-ui';
 import SwaggerUIBundle from 'swagger-ui-dist/swagger-ui-bundle.js';
 import 'swagger-ui-dist/swagger-ui.css';
 
 import { apiUrl, getApiBaseUrl, getToken } from '../api/client';
-import { resetPageHeader, setPageHeader } from '../composables/pageHeader';
 
 type SwaggerSystem = {
   getSystem?: () => {
@@ -47,19 +46,10 @@ const openApiUrl = apiUrl('/api/openapi.json');
 let swaggerUi: SwaggerSystem | undefined;
 
 onMounted(async () => {
-  setPageHeader({
-    actions: [
-      { key: 'copy-api-token-header', label: '复制传参示例', onClick: copyHeaderSample }
-    ]
-  });
   await nextTick();
   initSwagger();
 });
 
-onBeforeUnmount(() => {
-  resetPageHeader();
-});
-
 function initSwagger() {
   if (!swaggerHost.value) return;