feat(interest): add public interest tracking for members of Congress

Adds Google Trends, NewsAPI, and Google News RSS scoring for members,
mirroring the existing bill interest pipeline. Member profiles now show
a Public Interest chart (with signal breakdown) and a Related News panel.

Key changes:
- New member_trend_scores + member_news_articles tables (migration 0008)
- fetch_gnews_articles() added to news_service for unlimited RSS article storage
- Bill news fetcher now combines NewsAPI + Google News RSS (more coverage)
- New member_interest Celery worker with scheduled news + trend tasks
- GET /members/{id}/trend and /news API endpoints
- TrendChart redesigned with signal breakdown badges and bar+line combo chart
- NewsPanel accepts generic article shape (bills and members)

Co-Authored-By: Jack Levy

frontend/components/bills/NewsPanel.tsx

@@ -1,9 +1,16 @@
 import { ExternalLink, Newspaper } from "lucide-react";
-import { NewsArticle } from "@/lib/types";
 import { formatDate } from "@/lib/utils";
 
+interface ArticleLike {
+  id: number;
+  source?: string;
+  headline?: string;
+  url?: string;
+  published_at?: string;
+}
+
 interface NewsPanelProps {
-  articles?: NewsArticle[];
+  articles?: ArticleLike[];
 }
 
 export function NewsPanel({ articles }: NewsPanelProps) {

frontend/components/bills/TrendChart.tsx

@@ -1,51 +1,89 @@
 "use client";
 
-import { TrendingUp } from "lucide-react";
+import { TrendingUp, Newspaper, Radio } from "lucide-react";
 import {
-  LineChart,
+  ComposedChart,
   Line,
+  Bar,
   XAxis,
   YAxis,
   Tooltip,
   ResponsiveContainer,
   CartesianGrid,
+  Legend,
 } from "recharts";
-import { TrendScore } from "@/lib/types";
-import { formatDate } from "@/lib/utils";
+import { TrendScore, MemberTrendScore } from "@/lib/types";
+
+type AnyTrendScore = TrendScore | MemberTrendScore;
 
 interface TrendChartProps {
-  data?: TrendScore[];
+  data?: AnyTrendScore[];
+  title?: string;
 }
 
-export function TrendChart({ data }: TrendChartProps) {
+function ScoreBadge({ label, value, icon }: { label: string; value: number | string; icon: React.ReactNode }) {
+  return (
+    <div className="flex flex-col items-center gap-0.5">
+      <div className="text-muted-foreground">{icon}</div>
+      <span className="text-xs font-semibold tabular-nums">{value}</span>
+      <span className="text-[10px] text-muted-foreground">{label}</span>
+    </div>
+  );
+}
+
+export function TrendChart({ data, title = "Public Interest" }: TrendChartProps) {
   const chartData = data?.map((d) => ({
-    date: new Date(d.score_date).toLocaleDateString("en-US", { month: "short", day: "numeric" }),
+    date: new Date(d.score_date + "T00:00:00").toLocaleDateString("en-US", { month: "short", day: "numeric" }),
     score: Math.round(d.composite_score),
-    news: d.newsapi_count,
+    newsapi: d.newsapi_count,
     gnews: d.gnews_count,
+    gtrends: Math.round(d.gtrends_score),
   })) ?? [];
 
-  const latest = data?.[data.length - 1]?.composite_score;
+  const latest = data?.[data.length - 1];
 
   return (
-    <div className="bg-card border border-border rounded-lg p-4">
-      <div className="flex items-center justify-between mb-4">
+    <div className="bg-card border border-border rounded-lg p-4 space-y-4">
+      <div className="flex items-center justify-between">
         <h3 className="font-semibold text-sm flex items-center gap-2">
           <TrendingUp className="w-4 h-4" />
-          Public Interest
+          {title}
         </h3>
         {latest !== undefined && (
-          <span className="text-2xl font-bold tabular-nums">{Math.round(latest)}</span>
+          <span className="text-2xl font-bold tabular-nums">{Math.round(latest.composite_score)}</span>
         )}
       </div>
 
+      {/* Signal breakdown badges */}
+      {latest && (
+        <div className="flex justify-around border border-border rounded-md p-2 bg-muted/30">
+          <ScoreBadge
+            label="NewsAPI"
+            value={latest.newsapi_count}
+            icon={<Newspaper className="w-3 h-3" />}
+          />
+          <div className="w-px bg-border" />
+          <ScoreBadge
+            label="Google News"
+            value={latest.gnews_count}
+            icon={<Radio className="w-3 h-3" />}
+          />
+          <div className="w-px bg-border" />
+          <ScoreBadge
+            label="Trends"
+            value={`${Math.round(latest.gtrends_score)}/100`}
+            icon={<TrendingUp className="w-3 h-3" />}
+          />
+        </div>
+      )}
+
       {chartData.length === 0 ? (
         <p className="text-xs text-muted-foreground italic text-center py-8">
-          Trend data not yet available.
+          Interest data not yet available. Check back after the nightly scoring run.
         </p>
       ) : (
         <ResponsiveContainer width="100%" height={180}>
-          <LineChart data={chartData} margin={{ top: 4, right: 4, left: -20, bottom: 0 }}>
+          <ComposedChart data={chartData} margin={{ top: 4, right: 4, left: -20, bottom: 0 }}>
             <CartesianGrid strokeDasharray="3 3" stroke="hsl(var(--border))" />
             <XAxis
               dataKey="date"
@@ -64,23 +102,33 @@ export function TrendChart({ data }: TrendChartProps) {
                 borderRadius: "6px",
                 fontSize: "12px",
               }}
+              formatter={(value: number, name: string) => {
+                const labels: Record<string, string> = {
+                  score: "Composite",
+                  newsapi: "NewsAPI articles",
+                  gnews: "Google News articles",
+                  gtrends: "Google Trends",
+                };
+                return [value, labels[name] ?? name];
+              }}
             />
+            <Bar dataKey="gnews" fill="hsl(var(--muted-foreground))" opacity={0.3} name="gnews" radius={[2, 2, 0, 0]} />
+            <Bar dataKey="newsapi" fill="hsl(var(--primary))" opacity={0.3} name="newsapi" radius={[2, 2, 0, 0]} />
             <Line
               type="monotone"
               dataKey="score"
               stroke="hsl(var(--primary))"
               strokeWidth={2}
               dot={false}
-              name="Zeitgeist Score"
+              name="score"
             />
-          </LineChart>
+          </ComposedChart>
         </ResponsiveContainer>
       )}
 
-      <div className="mt-3 flex gap-4 text-xs text-muted-foreground">
-        <span>Score: 0–100 composite</span>
-        <span>NewsAPI + Google News + Trends</span>
-      </div>
+      <p className="text-[10px] text-muted-foreground">
+        Composite 0–100 · NewsAPI articles (max 40 pts) + Google News volume (max 30 pts) + Google Trends score (max 30 pts)
+      </p>
     </div>
   );
 }