diff --git a/app/static/index.html b/app/static/index.html
index a6f8034..66b86fa 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -173,6 +173,45 @@
   .check-btn:hover { border-color: var(--accent); color: var(--accent); }
   .check-btn.checking { opacity: .5; cursor: default; }
 
+  /* Модальное окно истории проверок */
+  .modal-overlay {
+    position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 2000;
+    display: flex; align-items: center; justify-content: center;
+    backdrop-filter: blur(2px); opacity: 0; pointer-events: none; transition: opacity .2s;
+  }
+  .modal-overlay.open { opacity: 1; pointer-events: auto; }
+  .modal-box {
+    background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
+    width: 90%; max-width: 650px; max-height: 80vh; display: flex; flex-direction: column;
+    box-shadow: 0 10px 30px rgba(0,0,0,.5); overflow: hidden;
+  }
+  .modal-header {
+    padding: 14px 18px; border-bottom: 1px solid var(--border);
+    display: flex; align-items: center; justify-content: space-between;
+  }
+  .modal-header h3 { margin: 0; font-size: 15px; color: var(--text); }
+  .modal-close {
+    background: none; border: none; color: var(--text2); font-size: 18px; cursor: pointer;
+  }
+  .modal-close:hover { color: var(--text); }
+  .modal-body {
+    padding: 14px 18px; overflow-y: auto; font-size: 12px;
+  }
+  .check-log-item {
+    padding: 8px 10px; border-bottom: 1px solid var(--border);
+    display: flex; flex-direction: column; gap: 4px;
+  }
+  .check-log-item:last-child { border-bottom: none; }
+  .log-line1 { display: flex; align-items: center; justify-content: space-between; }
+  .log-status.ok { color: var(--green); }
+  .log-status.fail { color: var(--red); }
+  .log-meta { color: var(--text2); font-size: 11px; }
+  .log-err {
+    color: var(--red); font-family: Consolas, 'Fira Mono', monospace;
+    font-size: 11px; background: rgba(248,81,73,.1); padding: 4px 6px;
+    border-radius: 4px; white-space: pre-wrap; word-break: break-word;
+  }
+
   .empty { padding: 40px 24px; color: var(--text2); text-align: center; }
   .loading { text-align: center; padding: 60px; color: var(--text2); }
 
@@ -491,11 +530,48 @@ async function checkOne(modelId, btn) {
 async function openCheckHistory(modelId, btn) {
   const res = await fetch(`/api/checks/${encodeURIComponent(modelId)}`);
   const data = await res.json();
-  const idx = allData.findIndex(m => m.id === modelId);
-  if (idx >= 0) {
-    allData[idx].history = (data.checks || []).map(c => ({ ok: c.ok, latency_ms: c.latency_ms, at: c.checked_at, error: c.error }));
+  const checks = data.checks || [];
+
+  let modal = document.getElementById('history-modal');
+  if (!modal) {
+    modal = document.createElement('div');
+    modal.id = 'history-modal';
+    modal.className = 'modal-overlay';
+    modal.innerHTML = `
+      <div class="modal-box">
+        <div class="modal-header">
+          <h3 id="modal-title">Лог проверок</h3>
+          <button class="modal-close" onclick="closeModal()">&times;</button>
+        </div>
+        <div class="modal-body" id="modal-body"></div>
+      </div>
+    `;
+    modal.addEventListener('click', e => { if (e.target === modal) closeModal(); });
+    document.body.appendChild(modal);
   }
-  applyFilters();
+
+  document.getElementById('modal-title').textContent = `Лог проверок: ${modelId}`;
+  const body = document.getElementById('modal-body');
+  if (!checks.length) {
+    body.innerHTML = '<div class="no-data" style="text-align:center;padding:20px;">Нет данных о проверках</div>';
+  } else {
+    body.innerHTML = checks.map(c => `
+      <div class="check-log-item">
+        <div class="log-line1">
+          <span class="log-status ${c.ok ? 'ok' : 'fail'}">${c.ok ? '✓ Успех' : '✗ Провал'}</span>
+          <span class="log-meta">${fmtTime(c.checked_at)} · ${c.latency_ms !== null && c.latency_ms !== undefined ? c.latency_ms + ' мс' : '—'}</span>
+        </div>
+        ${c.error ? `<div class="log-err">${escapeHtml(c.error)}</div>` : ''}
+      </div>
+    `).join('');
+  }
+
+  modal.classList.add('open');
+}
+
+function closeModal() {
+  const modal = document.getElementById('history-modal');
+  if (modal) modal.classList.remove('open');
 }
 
 document.getElementById('btn-refresh').addEventListener('click', loadData);