feat: 重构数据中枢工作台与接入管理

- 新增统一的数据源、目录、纳管表与 Excel 处理后端能力

- 重建管理端数据中枢工作台并替换旧表管理页面

- 补充数据中枢迁移脚本、连接器底座与说明字段支持

easyflow-ui-admin/app/src/api/request.ts

@@ -23,6 +23,31 @@ import { useAuthStore } from '#/store';
 import { refreshTokenApi } from './core';
 
 const { apiURL } = useAppConfig(import.meta.env, import.meta.env.PROD);
+const ERROR_MESSAGE_DEDUP_WINDOW = 800;
+const SILENT_ERROR_MESSAGES = new Set([
+  '当前连接不可用，请检查连接配置后重试',
+  '连接不存在',
+]);
+let lastErrorMessage = '';
+let lastErrorTimestamp = 0;
+
+function showErrorOnce(message?: string) {
+  const nextMessage = String(message || '').trim();
+  if (!nextMessage) return;
+  if (SILENT_ERROR_MESSAGES.has(nextMessage)) {
+    return;
+  }
+  const now = Date.now();
+  if (
+    nextMessage === lastErrorMessage &&
+    now - lastErrorTimestamp < ERROR_MESSAGE_DEDUP_WINDOW
+  ) {
+    return;
+  }
+  lastErrorMessage = nextMessage;
+  lastErrorTimestamp = now;
+  ElMessage.error(nextMessage);
+}
 
 function createRequestClient(baseURL: string, options?: RequestClientOptions) {
   const client = new RequestClient({
@@ -80,7 +105,7 @@ function createRequestClient(baseURL: string, options?: RequestClientOptions) {
       codeField: 'errorCode',
       dataField: 'data',
       showErrorMessage: (message) => {
-        ElMessage.error(message);
+        showErrorOnce(message);
       },
       successCode: 0,
     }),
@@ -105,7 +130,7 @@ function createRequestClient(baseURL: string, options?: RequestClientOptions) {
       const responseData = error?.response?.data ?? {};
       const errorMessage = responseData?.error ?? responseData?.message ?? '';
       // 如果没有错误信息，则会根据状态码进行提示
-      ElMessage.error(errorMessage || msg);
+      showErrorOnce(errorMessage || msg);
     }),
   );