fix(news): auto-retry news fetch when backend Celery task is in-flight

When a bill page opens with no stored articles, the backend queues a
fetch_news_for_bill Celery task and returns immediately. Added a retry
loop (up to 3x, 6 s apart) driven off newsArticles state so articles
populate without a manual refresh. Fixed broken useEffect dependency
([billId] → [newsArticles]) that caused the timer to never fire.
News is now fetched via a separate useBillNews query (staleTime: 0)
independent of the cached bill detail response.

Co-Authored-By: Jack Levy

frontend/app/bills/[id]/page.tsx

@@ -1,9 +1,9 @@
 "use client";
 
-import { use } from "react";
+import { use, useEffect, useRef } from "react";
 import Link from "next/link";
 import { ArrowLeft, ExternalLink, User } from "lucide-react";
-import { useBill, useBillTrend } from "@/lib/hooks/useBills";
+import { useBill, useBillNews, useBillTrend } from "@/lib/hooks/useBills";
 import { BriefPanel } from "@/components/bills/BriefPanel";
 import { ActionTimeline } from "@/components/bills/ActionTimeline";
 import { TrendChart } from "@/components/bills/TrendChart";
@@ -17,6 +17,23 @@ export default function BillDetailPage({ params }: { params: Promise<{ id: strin
 
   const { data: bill, isLoading } = useBill(billId);
   const { data: trendData } = useBillTrend(billId, 30);
+  const { data: newsArticles, refetch: refetchNews } = useBillNews(billId);
+
+  // When the bill page is opened with no stored articles, the backend queues
+  // a Celery news-fetch task that takes a few seconds to complete.
+  // Retry up to 3 times (every 6 s) so articles appear without a manual refresh.
+  // newsRetryRef resets on bill navigation so each bill gets its own retry budget.
+  const newsRetryRef = useRef(0);
+  useEffect(() => { newsRetryRef.current = 0; }, [billId]);
+  useEffect(() => {
+    if (newsArticles === undefined || newsArticles.length > 0) return;
+    if (newsRetryRef.current >= 3) return;
+    const timer = setTimeout(() => {
+      newsRetryRef.current += 1;
+      refetchNews();
+    }, 6000);
+    return () => clearTimeout(timer);
+  }, [newsArticles]); // eslint-disable-line react-hooks/exhaustive-deps
 
   if (isLoading) {
     return <div className="text-center py-20 text-muted-foreground">Loading bill...</div>;
@@ -85,7 +102,7 @@ export default function BillDetailPage({ params }: { params: Promise<{ id: strin
         </div>
         <div className="space-y-4">
           <TrendChart data={trendData} />
-          <NewsPanel articles={bill.news_articles} />
+          <NewsPanel articles={newsArticles} />
         </div>
       </div>
     </div>