diff --git a/public/refresh-login-20260912.html b/public/refresh-login-20260912.html
new file mode 100644
index 0000000..b89c8b5
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+++ b/public/refresh-login-20260912.html
@@ -0,0 +1,52 @@
+<!doctype html>
+<html lang="ru">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width,initial-scale=1">
+  <meta http-equiv="Cache-Control" content="no-store, no-cache, must-revalidate, max-age=0">
+  <meta http-equiv="Pragma" content="no-cache">
+  <title>Caterium — обновление</title>
+  <style>
+    html,body{height:100%;margin:0}body{display:grid;place-items:center;background:#f5f0e7;color:#282621;font:16px Arial,sans-serif}.box{width:min(520px,calc(100% - 40px));text-align:center}.mark{width:78px;height:78px;object-fit:contain;margin-bottom:24px}.title{font:500 38px/1.05 Georgia,'Times New Roman',serif;margin:0 0 12px}.text{color:#777168;line-height:1.55}.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#e5a313;margin-right:8px;animation:pulse 1s infinite alternate}@keyframes pulse{to{opacity:.25;transform:scale(.8)}}
+  </style>
+</head>
+<body>
+  <main class="box">
+    <img class="mark" src="/caterium-mark-light.svg?refresh=20260912-3" alt="Caterium">
+    <h1 class="title">Обновляем Caterium</h1>
+    <p class="text" id="status"><span class="dot"></span>Удаляем старый экран входа и подключаем свежую версию…</p>
+  </main>
+<script>
+(async()=>{
+  const status=document.getElementById('status');
+  const stamp='20260912-3-'+Date.now();
+  try{
+    if('serviceWorker' in navigator){
+      const regs=await navigator.serviceWorker.getRegistrations();
+      await Promise.all(regs.map(r=>r.unregister()));
+    }
+    if('caches' in window){
+      const keys=await caches.keys();
+      await Promise.all(keys.map(k=>caches.delete(k)));
+    }
+    if('serviceWorker' in navigator){
+      const reg=await navigator.serviceWorker.register('/service-worker.js?reset='+encodeURIComponent(stamp),{scope:'/'});
+      const worker=reg.installing||reg.waiting||reg.active;
+      if(worker && worker.state!=='activated'){
+        await new Promise(resolve=>{
+          const done=()=>{if(worker.state==='activated'||worker.state==='redundant')resolve()};
+          worker.addEventListener('statechange',done);done();setTimeout(resolve,5000);
+        });
+      }
+      await navigator.serviceWorker.ready.catch(()=>{});
+    }
+    status.innerHTML='<span class="dot"></span>Готово. Открываем свежий экран входа…';
+    setTimeout(()=>location.replace('/?fresh='+encodeURIComponent(stamp)),350);
+  }catch(err){
+    status.textContent='Кэш очищен частично. Сейчас всё равно откроем приложение заново.';
+    setTimeout(()=>location.replace('/?fresh='+encodeURIComponent(stamp)),800);
+  }
+})();
+</script>
+</body>
+</html>
