slice 1+2: header social URLs, drop TwitterX/Press Kit, wrap About/Team/PressKit, add /newsletter + /rss

- Header.tsx: bare linkedin/instagram/facebook URLs → /broadcastbeat handles; remove TwitterXIcon from social bar + import (Footer retains TwitterXIcon per "DO NOT OVERRIDE" marker)
- AboutDropdown.tsx: drop "Press kit" item (the page itself stays at /about/press-kit, just delisted from menu)
- SystemStatusBar.tsx: remove "Index online" pulse-dot and "N wire sources" span (keep articles count + events count + build version)
- /about, /about/team, /about/press-kit: wrap in Header+Footer (previously rendered bare <main>)
- /newsletter/page.tsx (new): redirect to /newsletter/archive — Header was 404'ing on /newsletter
- /rss/route.ts (new): dynamic RSS feed reading from legacy-source news section; replaces 404 at /rss

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/rss/route.ts

@@ -0,0 +1,60 @@
+import { getLegacyArticlesBySection } from "@/lib/articles/legacy-source";
+
+export const dynamic = "force-dynamic";
+export const revalidate = 1800;
+
+const SITE_URL = process.env.NEXT_PUBLIC_SITE_URL || "https://broadcastbeat.com";
+
+function escapeXml(s: string): string {
+  return s
+    .replace(/&/g, "&")
+    .replace(/</g, "&lt;")
+    .replace(/>/g, "&gt;")
+    .replace(/"/g, "&quot;")
+    .replace(/'/g, "&apos;");
+}
+
+export async function GET() {
+  let items = "";
+  try {
+    const articles = await getLegacyArticlesBySection("news", 50);
+    items = articles
+      .map((a) => {
+        const url = `${SITE_URL}/news/${a.slug}`;
+        const pubDate = a.date ? new Date(a.date).toUTCString() : new Date().toUTCString();
+        const title = escapeXml(a.title || "Untitled");
+        const description = escapeXml(a.excerpt || "");
+        return `    <item>
+      <title>${title}</title>
+      <link>${url}</link>
+      <guid isPermaLink="true">${url}</guid>
+      <pubDate>${pubDate}</pubDate>
+      <description>${description}</description>
+    </item>`;
+      })
+      .join("\n");
+  } catch {
+    // serve an empty but valid feed on failure
+    items = "";
+  }
+
+  const body = `<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>BroadcastBeat</title>
+    <link>${SITE_URL}</link>
+    <atom:link href="${SITE_URL}/rss" rel="self" type="application/rss+xml" />
+    <description>News &amp; Intelligence for Broadcast, Post-Production &amp; Streaming Technology</description>
+    <language>en-us</language>
+    <lastBuildDate>${new Date().toUTCString()}</lastBuildDate>
+${items}
+  </channel>
+</rss>`;
+
+  return new Response(body, {
+    headers: {
+      "Content-Type": "application/rss+xml; charset=utf-8",
+      "Cache-Control": "public, max-age=1800, s-maxage=1800, stale-while-revalidate=3600",
+    },
+  });
+}