chore: hide demo gallery panel from UI

Demo gallery preserved on feat/demo-gallery branch for future work.

Author: GeneralJerel

apps/app/src/app/page.tsx

@@ -1,27 +1,15 @@
 "use client";
 
-import { useEffect, useState } from "react";
+import { useEffect } from "react";
 import { ExampleLayout } from "@/components/example-layout";
 import { useGenerativeUIExamples, useExampleSuggestions } from "@/hooks";
 import { ExplainerCardsPortal } from "@/components/explainer-cards";
-import { DemoGallery, type DemoItem } from "@/components/demo-gallery";
-
 import { CopilotChat } from "@copilotkit/react-core/v2";
-import { useCopilotChat } from "@copilotkit/react-core";
 
 export default function HomePage() {
   useGenerativeUIExamples();
   useExampleSuggestions();
 
-  const [demoDrawerOpen, setDemoDrawerOpen] = useState(false);
-  const { appendMessage } = useCopilotChat();
-
-  const handleTryDemo = (demo: DemoItem) => {
-    setDemoDrawerOpen(false);
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    appendMessage({ content: demo.prompt, role: "user" } as any);
-  };
-
   // Widget bridge: handle messages from widget iframes
   useEffect(() => {
     const handler = (e: MessageEvent) => {
@@ -67,25 +55,6 @@ export default function HomePage() {
                 </p>
               </div>
               <div className="flex items-center gap-2">
-                <button
-                  onClick={() => setDemoDrawerOpen(true)}
-                  className="inline-flex items-center gap-1.5 px-3 py-2 rounded-full text-sm font-medium no-underline whitespace-nowrap transition-all duration-150 hover:-translate-y-px cursor-pointer"
-                  style={{
-                    color: "var(--text-secondary)",
-                    border: "1px solid var(--color-border-glass, rgba(0,0,0,0.1))",
-                    background: "var(--surface-primary, rgba(255,255,255,0.6))",
-                    fontFamily: "var(--font-family)",
-                  }}
-                  title="Open Demo Gallery"
-                >
-                  <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
-                    <rect width="7" height="7" x="3" y="3" rx="1" />
-                    <rect width="7" height="7" x="14" y="3" rx="1" />
-                    <rect width="7" height="7" x="14" y="14" rx="1" />
-                    <rect width="7" height="7" x="3" y="14" rx="1" />
-                  </svg>
-                  Demos
-                </button>
                 <a
                   href="https://github.com/CopilotKit/OpenGenerativeUI"
                   target="_blank"
@@ -114,11 +83,6 @@ export default function HomePage() {
         </div>
       </div>
 
-      <DemoGallery
-        open={demoDrawerOpen}
-        onClose={() => setDemoDrawerOpen(false)}
-        onTryDemo={handleTryDemo}
-      />
     </>
   );
 }