Enhance error handling and user experience in AI-related features

- Introduced a mechanism to save partially generated responses in case of errors, ensuring users do not lose their input.
- Updated the RevizyonKutusu component to utilize a persistent request ID for retrying failed requests without double charging credits.
- Improved the Sayfalama component to support client-side pagination without changing the URL, enhancing user navigation.
- Added a timeout for AI generation requests to ensure credits are refunded in case of prolonged processing.
- Refactored various components for better clarity and responsiveness, including updates to the BolumProgramListesi and ListePaneli components.

src/app/paket/page.tsx

@@ -164,11 +164,20 @@ export default async function PaketPage({
                 {tl(URUNLER.topup.amountKurus)} TL.
               </p>
               <div className="mt-4">
-                {u ? (
+                {/* Top-up hasPaket vermez: paketsiz biri alırsa parasını verip
+                    yine maskeli liste görür. Satın alma yalnızca paketliye
+                    açık; paketsize durum dürüstçe açıklanır. */}
+                {u?.hasPaket ? (
                   <SatinAlForm
                     urun="topup"
                     label={`+${URUNLER.topup.credits} kredi — ${tl(URUNLER.topup.amountKurus)} TL`}
                   />
+                ) : u ? (
+                  <p className="rounded-xl border border-slate-200 bg-slate-50 px-3 py-2.5 text-xs leading-5 text-slate-600">
+                    Ek kredi, kilitli analizleri açmaz — o yüzden önce paket
+                    gerekir. Paket zaten {URUNLER.paket.credits} kredi içerir;
+                    bitince buradan yükleyebilirsin.
+                  </p>
                 ) : (
                   <Button
                     asChild