feat：替换 Dify 为自建 RAG去实现

1、修复了若干无权限时的失败提示语
2、新增了一个生成后续建议问题的功能
3、重构了知识问答部分的权限管理模块
4、修复了若干渲染不恰当的样式渲染

app/components/dify-dataset-manager/layout.tsx

@@ -9,6 +9,7 @@ import {
     SwapOutlined,
 } from '@ant-design/icons';
 import type { DatasetLayoutProps, MenuTab, MenuItem } from '~/types/dify-dataset-manager/layout';
+import { usePermission } from '~/hooks/usePermission';
 
 /**
  * 知识库布局组件
@@ -25,11 +26,13 @@ export default function DatasetLayout({
     loadingAvailableDatasets = false,
     onDatasetChange,
 }: DatasetLayoutProps) {
+    const { hasPermission } = usePermission();
+
     const menuItems: MenuItem[] = [
-        { key: 'documents', icon: <FileTextOutlined />, label: '文档' },
-        { key: 'retrieve', icon: <SearchOutlined />, label: '召回测试' },
-        { key: 'area-config', icon: <AppstoreOutlined />, label: '配置管理' },
-        { key: 'settings', icon: <SettingOutlined />, label: '设置' },
+        ...(hasPermission('dify:dataset:read') ? [{ key: 'documents' as MenuTab, icon: <FileTextOutlined />, label: '文档' }] : []),
+        ...(hasPermission('dify:retrieve:test') ? [{ key: 'retrieve' as MenuTab, icon: <SearchOutlined />, label: '召回测试' }] : []),
+        ...(hasPermission('dify:config:manage') ? [{ key: 'area-config' as MenuTab, icon: <AppstoreOutlined />, label: '配置管理' }] : []),
+        ...(hasPermission('dify:settings:write') ? [{ key: 'settings' as MenuTab, icon: <SettingOutlined />, label: '设置' }] : []),
     ];
 
     // 是否显示知识库选择器（有多个知识库时显示）