refactor(api): 移除未使用的配置接口及相关Hook

- 从cmsWebsiteField接口中删除configWebsiteField方法
- 删除useConfig自定义Hook及其引用
- 更新about页面，去除对config对象和useConfig的使用
- 修正invite模块请求URL，统一加上/api前缀

src/hooks/useConfig.ts

@@ -1,50 +0,0 @@
-import { useEffect, useState } from 'react';
-import Taro from '@tarojs/taro';
-import { configWebsiteField } from '@/api/cms/cmsWebsiteField';
-import { Config } from '@/api/cms/cmsWebsiteField/model';
-
-/**
- * 自定义Hook用于获取和管理网站配置数据
- * @returns {Object} 包含配置数据和加载状态的对象
- */
-export const useConfig = () => {
-  const [config, setConfig] = useState<Config | null>(null);
-  const [loading, setLoading] = useState<boolean>(true);
-  const [error, setError] = useState<Error | null>(null);
-
-  useEffect(() => {
-    const fetchConfig = async () => {
-      try {
-        setLoading(true);
-        const data = await configWebsiteField();
-        setConfig(data);
-        Taro.setStorageSync('config', data);
-        
-        // 设置主题
-        if (data.theme && !Taro.getStorageSync('user_theme')) {
-          Taro.setStorageSync('user_theme', data.theme);
-        }
-      } catch (err) {
-        setError(err instanceof Error ? err : new Error('获取配置失败'));
-        console.error('获取网站配置失败:', err);
-      } finally {
-        setLoading(false);
-      }
-    };
-
-    fetchConfig();
-  }, []);
-
-  return { config, loading, error, refetch: () => {
-    setLoading(true);
-    setError(null);
-    configWebsiteField().then(data => {
-      setConfig(data);
-      Taro.setStorageSync('config', data);
-      setLoading(false);
-    }).catch(err => {
-      setError(err instanceof Error ? err : new Error('获取配置失败'));
-      setLoading(false);
-    });
-  }};
-};