Add admin presence timing settings

public/admin.js

@@ -71,6 +71,9 @@ $("#logoutButton").addEventListener("click", async () => {
 
 $("#settingsButton").addEventListener("click", () => $("#settingsPanel").classList.toggle("hidden"));
 $("#closeSettingsButton").addEventListener("click", () => $("#settingsPanel").classList.add("hidden"));
+$("#presenceActiveSeconds").addEventListener("input", markPresenceSettingsDirty);
+$("#presenceOfflineSeconds").addEventListener("input", markPresenceSettingsDirty);
+$("#savePresenceSettings").addEventListener("click", savePresenceSettings);
 $("#adminSoundToggle").addEventListener("click", () => {
   setAdminSoundMuted(!state.soundMuted);
 });
@@ -522,6 +525,7 @@ function renderSite() {
     ? `Klic ulozeny (${s.translations.openaiApiKeyMasked || "sk-..."})`
     : "Klic neni ulozeny. Bez nej AI preklady nepobezi.";
   renderModelOptions(s.translations?.model || "gpt-5-mini");
+  renderPresenceSettings(s.adminPresence || {});
   renderTelegramSettings(s.telegram || {});
 }
 
@@ -757,6 +761,52 @@ function setOpenAiStatus(message) {
   $("#openaiApiKeyStatus").textContent = message;
 }
 
+function renderPresenceSettings(settings) {
+  const normalized = normalizePresenceSettings(settings);
+  $("#presenceActiveSeconds").value = normalized.activeSeconds;
+  $("#presenceOfflineSeconds").value = normalized.offlineSeconds;
+  setPresenceStatus(`Oranzova: ${normalized.activeSeconds}-${normalized.offlineSeconds} s necinosti.`);
+}
+
+function markPresenceSettingsDirty() {
+  const normalized = normalizePresenceSettings({
+    activeSeconds: $("#presenceActiveSeconds").value,
+    offlineSeconds: $("#presenceOfflineSeconds").value
+  });
+  setPresenceStatus(`Neulozeno. Oranzova bude ${normalized.activeSeconds}-${normalized.offlineSeconds} s.`);
+}
+
+async function savePresenceSettings() {
+  if (!state.site) return;
+  const normalized = normalizePresenceSettings({
+    activeSeconds: $("#presenceActiveSeconds").value,
+    offlineSeconds: $("#presenceOfflineSeconds").value
+  });
+  setPresenceStatus("Ukladam signalizaci...");
+  const settings = structuredClone(state.site.settings);
+  settings.adminPresence = normalized;
+  await saveSite({ settings, isOnline: state.site.isOnline });
+  renderPresenceSettings(state.site.settings.adminPresence || normalized);
+  await Promise.all([loadConversations(), loadVisitors()]);
+  setPresenceStatus(`Ulozeno. Oranzova: ${normalized.activeSeconds}-${normalized.offlineSeconds} s.`);
+}
+
+function normalizePresenceSettings(value = {}) {
+  const activeSeconds = clampNumber(value.activeSeconds, 10, 3600, 30);
+  const offlineSeconds = Math.max(clampNumber(value.offlineSeconds, 20, 7200, 120), activeSeconds + 10);
+  return { activeSeconds, offlineSeconds };
+}
+
+function clampNumber(value, min, max, fallback) {
+  const number = Number(value);
+  if (!Number.isFinite(number)) return fallback;
+  return Math.min(max, Math.max(min, Math.round(number)));
+}
+
+function setPresenceStatus(message) {
+  $("#presenceStatus").textContent = message;
+}
+
 function renderTelegramSettings(settings) {
   $("#telegramEnabled").checked = Boolean(settings.enabled);
   $("#telegramOperatorName").value = settings.operatorName || "Alex";