persist imported calendar events per session

src/components/tools/TenderCalendar.jsx

@@ -10,7 +10,11 @@ export const TenderCalendar = () => {
   const today = istanbulDateKey(now);
   const [month,setMonth] = useState(today.slice(0,7));
   const [selectedDay, setSelectedDay] = useState(today);
-  const [imported,setImported] = useState([]), [importError,setImportError] = useState('');
+  const [imported,setImported] = useState(() => {
+    try { const saved = JSON.parse(sessionStorage.getItem('ihaleist_imported_calendar') || '[]'); return Array.isArray(saved) && saved.length <= 100 ? saved : []; }
+    catch { return []; }
+  }), [importError,setImportError] = useState('');
+  React.useEffect(() => { try { sessionStorage.setItem('ihaleist_imported_calendar', JSON.stringify(imported)); } catch { /* private browsing can deny storage */ } }, [imported]);
   const allTenders = useMemo(() => [...tenders, ...imported], [tenders, imported]);
   const agenda=useMemo(()=>calendarAgenda(allTenders,now),[allTenders,now]);
   const daysList=calendarMonthDays(month).map(day=>({...day,count:agenda.days.get(day.key)?.length || 0}));
@@ -59,7 +63,7 @@ export const TenderCalendar = () => {
           catch(error) { setImported([]); setImportError(error.message); }
           event.target.value='';
         }} className="block text-xs" />
-        {imported.length>0&&<p role="status" className="text-xs text-emerald-700">{imported.length} harici etkinlik içe aktarıldı.</p>}
+        {imported.length>0&&<div className="flex flex-wrap items-center gap-3"><p role="status" className="text-xs text-emerald-700">{imported.length} harici etkinlik içe aktarıldı.</p><button type="button" className="text-xs underline text-slate-700" onClick={()=>setImported([])}>İçe aktarılanları temizle</button></div>}
         {importError&&<p role="alert" className="text-xs text-red-700">Takvim içe aktarılamadı: {importError}</p>}
       </section>
       <div role="group" className="flex flex-wrap gap-2" aria-label="Takvim ayı gezinme">