feat(menu): 移除知识库功能入口和Webhook配置

- 从菜单中移除知识生成相关的BookOpen图标
- 删除知识库功能的导航项及其相关配置
- 移除Webhook配置页面和对应的菜单选项
- 简化设置页面的导入依赖和组件结构

frontend/src/pages/SettingsPage/SettingsPage.tsx

@@ -1,14 +1,11 @@
 import { useState } from "react";
-import { Button, Menu } from "antd";
-import { SettingOutlined, ApiOutlined } from "@ant-design/icons";
-import { Component, X } from "lucide-react";
-import { useNavigate } from "react-router";
+import { Menu } from "antd";
+import { SettingOutlined } from "@ant-design/icons";
+import { Component } from "lucide-react";
 import SystemConfig from "./SystemConfig";
 import ModelAccess from "./ModelAccess";
-import WebhookConfig from "./WebhookConfig";
 
 export default function SettingsPage() {
-  const navigate = useNavigate();
   const [activeTab, setActiveTab] = useState("model-access");
 
   return (
@@ -32,13 +29,6 @@ export default function SettingsPage() {
                 icon: <SettingOutlined />,
                 label: "参数配置",
               },
-              {
-                key: "webhook-config",
-                icon: <ApiOutlined />,
-                label: "Webhook",
-                disabled: true,
-                title: "暂未开放"
-              },
             ]}
             selectedKeys={[activeTab]}
             onClick={({ key }) => {
@@ -51,7 +41,6 @@ export default function SettingsPage() {
         {/* 内容区域，根据 activeTab 渲染不同的组件 */}
         {activeTab === "system-config" && <SystemConfig />}
         {activeTab === "model-access" && <ModelAccess />}
-        {activeTab === "webhook-config" && <WebhookConfig />}
       </div>
     </div>
   );