fix: always show custom landing page, remove backend home_page_content override

The backend home_page_content setting was overriding the custom
OasisRelay landing page with old content. Since we have a fully
custom landing page now, remove the API check entirely.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/src/pages/Home/index.jsx

@@ -17,11 +17,9 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
 For commercial licensing, please contact support@quantumnous.com
 */
 
-import React, { useContext, useEffect, useState, useRef } from 'react';
+import React, { useContext, useEffect, useState } from 'react';
 import { API } from '../../helpers';
 import { StatusContext } from '../../context/Status';
-import { useActualTheme } from '../../context/Theme';
-import { marked } from 'marked';
 import { useTranslation } from 'react-i18next';
 import { Link } from 'react-router-dom';
 import NoticeModal from '../../components/layout/NoticeModal';
@@ -79,53 +77,10 @@ const FaqItem = ({ question, children, defaultOpen }) => {
    首页主组件
 ────────────────────────────────────────────── */
 const Home = () => {
-  const { i18n } = useTranslation();
   const [statusState] = useContext(StatusContext);
-  const actualTheme = useActualTheme();
-  const cachedContent = localStorage.getItem('home_page_content') || '';
-  const [homePageContentLoaded, setHomePageContentLoaded] = useState(!!cachedContent);
-  const [homePageContent, setHomePageContent] = useState(cachedContent);
   const [noticeVisible, setNoticeVisible] = useState(false);
   const isMobile = useIsMobile();
 
-  /* 服务端配置的自定义首页内容（Markdown 或外链 URL） */
-  const displayHomePageContent = async () => {
-    const cached = localStorage.getItem('home_page_content') || '';
-    setHomePageContent(cached);
-    try {
-      const res = await API.get('/api/home_page_content');
-      const { success, data } = res.data;
-      if (success && data && data.trim() !== '') {
-        let content = data;
-        if (!data.startsWith('https://')) {
-          content = marked.parse(data);
-        }
-        setHomePageContent(content);
-        localStorage.setItem('home_page_content', content);
-
-        if (data.startsWith('https://')) {
-          const iframe = document.querySelector('iframe');
-          if (iframe) {
-            iframe.onload = () => {
-              iframe.contentWindow.postMessage({ themeMode: actualTheme }, '*');
-              iframe.contentWindow.postMessage({ lang: i18n.language }, '*');
-            };
-          }
-        }
-        setHomePageContentLoaded(true);
-      } else {
-        // 没有自定义内容，显示默认首页
-        localStorage.removeItem('home_page_content');
-        setHomePageContent('');
-        setHomePageContentLoaded(true);
-      }
-    } catch (e) {
-      // 网络错误/无后端，直接显示默认首页，不报错
-      setHomePageContent('');
-      setHomePageContentLoaded(true);
-    }
-  };
-
   useEffect(() => {
     const checkNoticeAndShow = async () => {
       const lastCloseDate = localStorage.getItem('notice_close_date');
@@ -145,24 +100,7 @@ const Home = () => {
     checkNoticeAndShow();
   }, []);
 
-  useEffect(() => {
+  /* ── Landing Page ── */
-    displayHomePageContent().then();
-  }, []);
-
-  /* 如果管理员设置了自定义首页内容，则显示那个 */
-  if (homePageContentLoaded && homePageContent !== '') {
-    return (
-      <div className='overflow-x-hidden w-full'>
-        {homePageContent.startsWith('https://') ? (
-          <iframe src={homePageContent} className='w-full h-screen border-none' />
-        ) : (
-          <div className='mt-[60px]' dangerouslySetInnerHTML={{ __html: homePageContent }} />
-        )}
-      </div>
-    );
-  }
-
-  /* ── 默认 Landing Page ── */
   return (
     <div className='lp-root'>
       <NoticeModal