manufacturers + NAB Show naming sweep

- Standardize "NAB Show" / "2026 NAB Show" across badges, filter chips,
  and headings; never bare "NAB" in user-facing copy.
- /manufacturers/[slug]: normalize show name at render, strip
  randomstring suffix on booth, hide booth unless the show is within 90
  days, filter single-letter junk out of category display.
- News filter "NAB Show" chip loose-matches any nab-tagged article so
  legacy "NAB 2026" tags still surface.

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

src/app/nab-2026/page.tsx

@@ -9,14 +9,14 @@ import CompanyMentionsHover from "@/components/CompanyMentionsHover";
 export const revalidate = 600;
 
 export const metadata: Metadata = {
-  title: "NAB Show 2026 — Live Coverage Hub | Broadcast Beat",
+  title: "2026 NAB Show — Live Coverage Hub | Broadcast Beat",
   description:
-    "Broadcast Beat's live coverage of NAB Show 2026: 1,100+ exhibitors, the latest product launches, booth-by-booth news, and editorial pick stories from the show floor.",
+    "Broadcast Beat's live coverage of 2026 NAB Show: 1,100+ exhibitors, the latest product launches, booth-by-booth news, and editorial pick stories from the show floor.",
   alternates: { canonical: "/nab-2026" },
   openGraph: {
-    title: "NAB Show 2026 — Live Coverage Hub",
+    title: "2026 NAB Show — Live Coverage Hub",
     description:
-      "Live coverage, exhibitor list, and breaking product news from NAB Show 2026.",
+      "Live coverage, exhibitor list, and breaking product news from 2026 NAB Show.",
     type: "website",
     url: "https://broadcastbeat.com/nab-2026",
   },
@@ -101,7 +101,7 @@ export default async function NabHub() {
             <span className="text-xs text-[#888]">April 11–16, 2026 · Las Vegas</span>
           </div>
           <h1 className="text-3xl md:text-5xl font-display font-bold text-[#e0e0e0] mb-3">
-            NAB Show 2026
+            2026 NAB Show
           </h1>
           <p className="text-[#aaa] text-base max-w-3xl">
             {exhibitors.length.toLocaleString()} exhibitors confirmed.
@@ -118,7 +118,7 @@ export default async function NabHub() {
           <section>
             <header className="flex items-baseline justify-between mb-4">
               <h2 className="text-xl font-display font-bold text-[#e0e0e0]">
-                Coverage Partners at NAB
+                Coverage Partners at the 2026 NAB Show
               </h2>
               <span className="text-xs text-[#888]">{sponsorRows.length} exhibiting partner{sponsorRows.length === 1 ? "" : "s"}</span>
             </header>
@@ -193,7 +193,7 @@ export default async function NabHub() {
         <section>
           <header className="flex items-baseline justify-between mb-4">
             <h2 className="text-xl font-display font-bold text-[#e0e0e0]">
-              All NAB 2026 exhibitors
+              All 2026 NAB Show exhibitors
             </h2>
             <Link href="/manufacturers" className="text-xs text-[#3b82f6] hover:underline">
               Full directory →