update tsrest code (#5755)

* doc

* update tsrest code

packages/global/common/tsRest/fastgpt/openapi.ts

@@ -0,0 +1,36 @@
+import { fastgptContract, type FadtGPTContractType } from './contracts';
+import { generateOpenApi } from '@ts-rest/open-api';
+
+const hasCustomTags = (metadata: unknown): metadata is { tags: string[] } => {
+  return !!metadata && typeof metadata === 'object' && 'tags' in metadata;
+};
+
+type OpenAPIObject = ReturnType<typeof generateOpenApi>;
+function generateOpenApiDocument(c: FadtGPTContractType): OpenAPIObject {
+  return generateOpenApi(
+    c,
+    {
+      info: {
+        title: 'FastGPT OpenAPI',
+        version: '4.13.2',
+        description: 'FastGPT OpenAPI'
+      },
+      servers: [{ url: '/api' }]
+    },
+    {
+      operationMapper(operation, appRoute) {
+        return {
+          ...operation,
+          ...(hasCustomTags(appRoute.metadata)
+            ? {
+                tags: appRoute.metadata.tags
+              }
+            : {})
+        };
+      },
+      setOperationId: false
+    }
+  );
+}
+
+export const fastgptOpenApiDocument = generateOpenApiDocument(fastgptContract);