feat(screen): 园区大屏园区资讯 widget

- ParkFeed 拉取 /park/api/content/feed，滚动展示本园区内容标题；图标用 @appica/icons-react(禁用emoji)
- DataScreen 挂载 ParkFeed

Co-Authored-By: Claude <noreply@anthropic.com>

src/pages/DataScreen.jsx

@@ -2,6 +2,7 @@ import { useState, useEffect, useRef } from 'react';
 import '../styles/datascreen.css';
 import Icon from '../components/Icons';
 import ParkOverviewStrip from '../components/ParkOverviewStrip';
+import ParkFeed from '../components/ParkFeed';
 import { useParkSim } from '../utils/parkData';
 
 /* =========================================================
@@ -576,6 +577,8 @@ export default function DataScreen() {
         </div>
       </section>
 
+      <ParkFeed />
+
       {/* 园区概览（保持在最底部） */}
       <ParkOverviewStrip d={d} />
     </div>