fix: clear consumed Telegram challenges after link changes

src/components/tools/TelegramBaglanti.jsx

@@ -31,8 +31,8 @@ const TelegramPanel = ({isAdmin}) => {
   const calistir = async (ad, fn, basari) => {
     if(locked.current)return;locked.current=true;
     setBusy(ad);setMesaj(null);
-    try {await fn();if(!alive.current)return;if(ad!=='load')await yenile();if(alive.current&&basari)setMesaj({tur:'ok',metin:basari});}
-    catch(e){if(alive.current)setMesaj({tur:'hata',metin:e.message});}
+    try {await fn();if(!alive.current)return;if(ad==='bagla'||ad==='sil')setChallenge(null);if(ad!=='load')await yenile();if(alive.current&&basari)setMesaj({tur:'ok',metin:basari});}
+    catch(e){if(alive.current){if(e.kod==='TELEGRAM_CHALLENGE_INVALID')setChallenge(null);setMesaj({tur:'hata',metin:e.message});}}
     finally{locked.current=false;if(alive.current)setBusy(null);}
   };
   useEffect(()=>{alive.current=true;void calistir('load',yenile);return()=>{alive.current=false;};},[]);
@@ -95,6 +95,7 @@ const TelegramPanel = ({isAdmin}) => {
             <li>Sonra buraya dönüp <strong>Doğrula</strong>'ya basın.</li>
           </ol>
           <button disabled={!!busy} className="border rounded px-3 py-2" onClick={()=>calistir('kod',async()=>{
+            setChallenge(null);
             const data=await telegramKodOlustur();
             if(typeof data.kod!=='string'||!/^[a-f0-9]{48}$/.test(data.kod)||!Number.isFinite(data.expiresAt))throw new Error('Bağlama kodu doğrulanamadı.');
             if(alive.current)setChallenge(data);