make labeled app regions semantic

src/components/TenderList.jsx

@@ -130,7 +130,7 @@ export const TenderList = () => {
   };
 
   return (
-    <div aria-label="İhale listesi" aria-busy={itemSearchState?.status === 'loading'} className="w-full min-w-0 flex-1 space-y-4">
+    <div role="region" aria-label="İhale listesi" aria-busy={itemSearchState?.status === 'loading'} className="w-full min-w-0 flex-1 space-y-4">
       {Object.entries(detailedQueries).filter(([,value])=>value).map(([key,value])=><div key={key} className="flex gap-3 items-center flex-wrap text-sm bg-blue-50 border rounded p-3">
         <span>{key==='institution'?'Kurum adı':'İKN / DT no'}: {value}</span>
         <button type="button" className="underline text-blue-800" onClick={()=>setDetailedQueries(old=>({...old,[key]:''}))}>{key==='institution'?'Kurum adı filtresini kaldır':'İKN filtresini kaldır'}</button>

src/components/tools/DocumentVault.jsx

@@ -164,7 +164,7 @@ const DocumentVaultSession = ({signedIn}) => {
   const doluluk = h?.bayt ? Math.min(100, Math.round(((k?.bayt || 0) / h.bayt) * 100)) : 0;
 
   return (
-    <div aria-label="Belge kasası" aria-busy={busy} className="space-y-6 animate-fade-in">
+    <div role="region" aria-label="Belge kasası" aria-busy={busy} className="space-y-6 animate-fade-in">
       {hata && <button type="button" onClick={yukle} className="px-4 py-2 border rounded-lg">Yeniden dene</button>}
       <div className="bg-linear-to-r from-slate-900 via-teal-950 to-cyan-900 text-white p-6 rounded-2xl shadow-lg border border-teal-800/40">
         <div className="flex items-center gap-3">

src/components/tools/TenderCalendar.jsx

@@ -29,7 +29,7 @@ export const TenderCalendar = () => {
   </button>;
 
   return (
-    <div aria-label="İhale takvimi" className="space-y-4 my-4 animate-fade-in">
+    <div role="region" aria-label="İhale takvimi" className="space-y-4 my-4 animate-fade-in">
       
       {/* Top Banner */}
       <div className="bg-white rounded-xl border border-slate-200 p-5 shadow-xs flex items-center justify-between">