refactor(app): remove dead template save relay from page component

Remove saveTemplate callback, postMessage handler, and unused useAgent
import from page.tsx. Template saving now happens directly in the
SaveTemplateOverlay component via useAgent().

Author: breadoncee

apps/app/src/app/page.tsx

@@ -1,65 +1,30 @@
 "use client";
 
-import { useEffect, useState, useCallback } from "react";
+import { useEffect, useState } from "react";
 import { ExampleLayout } from "@/components/example-layout";
 import { useGenerativeUIExamples, useExampleSuggestions } from "@/hooks";
 import { ExplainerCardsPortal } from "@/components/explainer-cards";
 import { TemplateLibrary } from "@/components/template-library";
 
 import { CopilotChat } from "@copilotkit/react-core/v2";
-import { useAgent } from "@copilotkit/react-core/v2";
 
 export default function HomePage() {
   useGenerativeUIExamples();
   useExampleSuggestions();
 
-  const { agent } = useAgent();
   const [templateDrawerOpen, setTemplateDrawerOpen] = useState(false);
 
-  // Save a template directly to agent state — no chat round-trip
-  const saveTemplate = useCallback((data: {
-    name: string;
-    title: string;
-    description: string;
-    html: string;
-  }) => {
-    const templates = agent.state?.templates || [];
-    const newTemplate = {
-      id: crypto.randomUUID(),
-      name: data.name || data.title || "Untitled Template",
-      description: data.description || data.title || "",
-      html: data.html,
-      data_description: "",
-      created_at: new Date().toISOString(),
-      version: 1,
-    };
-    agent.setState({ templates: [...templates, newTemplate] });
-  }, [agent]);
-
-  // Send a prompt via the agent API — adds a user message and triggers a run
-  const sendPrompt = useCallback((text: string) => {
-    agent.addMessage({
-      id: crypto.randomUUID(),
-      role: "user",
-      content: text,
-    });
-    agent.runAgent();
-  }, [agent]);
-
   // Widget bridge: handle messages from widget iframes
   useEffect(() => {
     const handler = (e: MessageEvent) => {
       if (e.data?.type === "open-link" && typeof e.data.url === "string") {
         window.open(e.data.url, "_blank", "noopener,noreferrer");
       }
-      // Handle save-as-template from WidgetRenderer — save directly to state
-      if (e.data?.type === "save-as-template") {
-        saveTemplate(e.data);
-      }
     };
     window.addEventListener("message", handler);
     return () => window.removeEventListener("message", handler);
-  }, [saveTemplate]);
+  }, []);
+
 
   return (
     <>
@@ -147,7 +112,6 @@ export default function HomePage() {
       <TemplateLibrary
         open={templateDrawerOpen}
         onClose={() => setTemplateDrawerOpen(false)}
-        onSendPrompt={sendPrompt}
       />
     </>
   );