forum: rebrand header — Community → Industry, broaden audience copy

- "Community Forum" → "Industry Forum"
- "Connect with broadcast engineering professionals" → "Connect with broadcast, motion picture and post production professionals worldwide"

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

src/app/forum/page.tsx

@@ -263,10 +263,10 @@ export default function ForumIndexPage() {
           <div className="max-w-container mx-auto px-4 py-10">
             <div className="flex items-center gap-3 mb-2">
               <span className="text-2xl">💬</span>
-              <h1 className="text-3xl font-heading font-bold text-white">Community Forum</h1>
+              <h1 className="text-3xl font-heading font-bold text-white">Industry Forum</h1>
             </div>
             <p className="text-[#aab4c4] font-body text-base max-w-2xl">
-              Connect with broadcast engineering professionals. Ask questions, share expertise, and discuss the technology shaping the industry.
+              Connect with broadcast, motion picture and post production professionals worldwide. Ask questions, share expertise, and discuss the technology shaping the industry.
             </p>
           </div>
         </div>