fix: /manufacturers UI cleanup + /about/team phone formatting + /about media-kit link

Three pointed fixes:

/manufacturers (cloned from BB; still had broadcast vibe)
  • Drop the hardcoded "NAB + IBC" filter chip.
  • Per-card "2026 NAB Show" / "IBC 2026" badges replaced by dynamic
    pills generated from shows_attending intersected with av.events
    (so each card now shows the actual AV shows that exhibitor is
    attending — InfoComm, CEDIA, ISE, DSE, etc.).
  • Page intro counts: drop nabCount / ibcCount hardcoding, compute
    "top 3 shows by exhibitor count" from the data and surface those
    counts dynamically. With only InfoComm 2026 currently tagged the
    line reads "851 at InfoComm 2026" — adds more rows once other
    shows are scraped.
  • Meta description + OG: pro-AV / display / signage instead of
    "broadcast, post-production, and live-production."

/about/team phone formatting
  • New formatPhone() helper: E.164 → "(213) 418-2600" pattern.
  • Extension format: ", Ext. NNN" (capital E, comma-separated).
  • tel: link still uses the raw digits + RFC-3966 ',ext' pause for
    PBX auto-dial on supported clients.

/about page media-kit link
  • Was href="/about/advertise" — a relative path that 404s (no such
    route exists). Replaced with the absolute media-kit URL on
    relevantmediaproperties.com that the /advertise + /about/contact
    pages already use. Opens in a new tab.

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

src/app/about/team/page.tsx

@@ -77,6 +77,15 @@ export default async function TeamPage() {
       .map((w) => w.charAt(0).toUpperCase())
       .join("");
 
+  // Format an E.164 US number as (XXX) XXX-XXXX. Falls back to the raw
+  // string for international or non-standard inputs.
+  const formatPhone = (raw: string): string => {
+    const digits = raw.replace(/[^0-9]/g, "");
+    const local = digits.startsWith("1") && digits.length === 11 ? digits.slice(1) : digits;
+    if (local.length !== 10) return raw;
+    return `(${local.slice(0, 3)}) ${local.slice(3, 6)}-${local.slice(6)}`;
+  };
+
   // Derive @avbeat.com email from the persona slug. Real mailboxes
   // are set up centrally; this is the authoring address surfaced to readers.
   const editorialEmail = (p: Persona): { user: string; domain: string } | null => {
@@ -242,8 +251,8 @@ export default async function TeamPage() {
                           })()}
                           {p.phone && (
                             <div>
-                              <a href={`tel:${p.phone.replace(/[^\d+]/g, '')}`} className="hover:text-[#7DD3FC] font-mono">
-                                {p.phone}{p.extension ? ` ext. ${p.extension}` : ''}
+                              <a href={`tel:${p.phone.replace(/[^\d+]/g, '')}${p.extension ? ',' + p.extension : ''}`} className="hover:text-[#7DD3FC] font-mono">
+                                {formatPhone(p.phone)}{p.extension ? `, Ext. ${p.extension}` : ''}
                               </a>
                             </div>
                           )}