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/components/header-gate.tsx

@@ -3,14 +3,17 @@
 import { usePathname } from "next/navigation";
 
 // Site kromunun (banner, header, üst/alt blur) gizleneceği rotalar
-// (tam eşleşme veya alt yol)
+// (tam eşleşme veya alt yol). KaydetBanner da aynı listeye uyar.
 const HIDDEN_PREFIXES = ["/giris"];
 
+export function kromGizliMi(pathname: string) {
+  return HIDDEN_PREFIXES.some(
+    (p) => pathname === p || pathname.startsWith(`${p}/`),
+  );
+}
+
 export function HeaderGate({ children }: { children: React.ReactNode }) {
   const pathname = usePathname();
-  const gizli = HIDDEN_PREFIXES.some(
-    (p) => pathname === p || pathname.startsWith(`${p}/`),
-  );
-  if (gizli) return null;
+  if (kromGizliMi(pathname)) return null;
   return <>{children}</>;
 }