Update package.json scripts, enhance layout with new components, and improve API error handling

- Added new scripts for database operations and temporary production in package.json.
- Integrated KaydetBannerLazy component into the layout for improved user notifications.
- Enhanced API error handling in the soru route to mark credit exhaustion.
- Updated the IletisimPage for better button styling and user experience.
- Refactored ListemPage to streamline user flow and improve session handling.
- Removed unused ListePaneli component to clean up the codebase.

src/app/api/netler/route.ts

@@ -0,0 +1,19 @@
+import { NextResponse, type NextRequest } from "next/server";
+import { netlerGetir } from "@/lib/db";
+
+// Program satırındaki "netler" butonunun verisi: programa yerleşen son
+// kişinin yıl bazlı netleri (bkz. components/program-netleri.tsx). Veri
+// yılda bir değiştiği için istemci tarafında gönül rahatlığıyla cache'lenir.
+export function GET(request: NextRequest) {
+  const id = request.nextUrl.searchParams.get("id") ?? "";
+  if (!/^\d{1,12}$/.test(id)) {
+    return NextResponse.json(
+      { error: "Geçerli bir program kimliği gerekli." },
+      { status: 400 },
+    );
+  }
+  return NextResponse.json(
+    { netler: netlerGetir(id) },
+    { headers: { "Cache-Control": "public, max-age=86400" } },
+  );
+}