Strengthen admin reply notifications

public/admin.js

@@ -6,7 +6,11 @@ const state = {
   active: null,
   events: null,
   statusFilter: "active",
-  replyFiles: []
+  replyFiles: [],
+  attentionTimer: null,
+  attentionOn: false,
+  originalTitle: document.title,
+  originalFavicon: document.querySelector("link[rel='icon']")?.href || "/favicon.svg"
 };
 
 const $ = (selector) => document.querySelector(selector);
@@ -41,6 +45,11 @@ $("#logoutButton").addEventListener("click", async () => {
 $("#settingsButton").addEventListener("click", () => $("#settingsPanel").classList.remove("hidden"));
 $("#closeSettingsButton").addEventListener("click", () => $("#settingsPanel").classList.add("hidden"));
 
+window.addEventListener("focus", stopAttention);
+document.addEventListener("visibilitychange", () => {
+  if (!document.hidden) stopAttention();
+});
+
 $("#onlineToggle").addEventListener("change", async () => {
   await saveSite({ isOnline: $("#onlineToggle").checked });
 });
@@ -69,26 +78,31 @@ $("#settingsForm").addEventListener("submit", async (event) => {
 $("#replyForm").addEventListener("submit", async (event) => {
   event.preventDefault();
   if (!state.activeId) return;
-  const textarea = event.currentTarget.querySelector("textarea[name='message']");
+  const replyForm = event.currentTarget;
+  const textarea = replyForm.querySelector("textarea[name='message']");
   const originalMessage = textarea.value;
-  const form = new FormData(event.currentTarget);
+  const form = new FormData(replyForm);
   const payload = {
     message: form.get("message") || "",
     attachments: await Promise.all(state.replyFiles.slice(0, 3).map(fileToPayload))
   };
   if (!payload.message.trim() && !payload.attachments.length) return;
-  textarea.value = "";
+  clearReplyComposer(replyForm);
   try {
     await api(`/api/admin/conversations/${state.activeId}/messages`, {
       method: "POST",
       body: payload
     });
-    event.currentTarget.reset();
+    clearReplyComposer(replyForm);
+    setTimeout(() => clearReplyComposer(replyForm), 0);
+    setTimeout(() => clearReplyComposer(replyForm), 120);
     state.replyFiles = [];
     renderReplyAttachments();
     await openConversation(state.activeId);
+    clearReplyComposer(replyForm);
   } catch (error) {
     textarea.value = originalMessage;
+    textarea.defaultValue = originalMessage;
     throw error;
   }
 });
@@ -207,6 +221,7 @@ async function loadConversations() {
 }
 
 async function openConversation(id) {
+  stopAttention();
   state.activeId = id;
   const data = await api(`/api/admin/conversations/${id}`);
   state.active = data;
@@ -234,7 +249,7 @@ function connectEvents() {
       return;
     }
     if (state.activeId) await openConversation(state.activeId).catch(() => clearActiveConversation());
-    if (data.type === "conversation:new" || data.type === "message:new") notify();
+    if (data.type === "conversation:new" || isVisitorMessageEvent(data)) notify();
   });
 }
 
@@ -443,6 +458,15 @@ function renderReplyAttachments() {
   `).join("");
 }
 
+function clearReplyComposer(form = $("#replyForm")) {
+  const textarea = form?.querySelector("textarea[name='message']");
+  if (!textarea) return;
+  textarea.value = "";
+  textarea.defaultValue = "";
+  textarea.textContent = "";
+  textarea.dispatchEvent(new Event("input", { bubbles: true }));
+}
+
 function mergeImageFiles(currentFiles, incomingFiles) {
   const allowedTypes = new Set(["image/jpeg", "image/png", "image/webp", "image/gif", "image/avif"]);
   const nextFiles = [...currentFiles];
@@ -544,19 +568,52 @@ async function saveSite(patch) {
 }
 
 function notify() {
-  document.title = "* Nova zprava - MaalFlows";
-  const audio = new AudioContext();
-  const osc = audio.createOscillator();
+  startAttention();
+  playNotifySound();
+}
+
+function playNotifySound() {
+  const AudioCtor = window.AudioContext || window.webkitAudioContext;
+  if (!AudioCtor) return;
+  const audio = new AudioCtor();
   const gain = audio.createGain();
-  osc.frequency.value = 880;
-  gain.gain.value = 0.04;
-  osc.connect(gain);
+  gain.gain.value = 0.055;
   gain.connect(audio.destination);
-  osc.start();
-  setTimeout(() => {
-    osc.stop();
-    audio.close();
-  }, 160);
+  [0, 0.14].forEach((offset, index) => {
+    const osc = audio.createOscillator();
+    osc.type = "sine";
+    osc.frequency.value = index ? 1040 : 820;
+    osc.connect(gain);
+    osc.start(audio.currentTime + offset);
+    osc.stop(audio.currentTime + offset + 0.11);
+  });
+  setTimeout(() => audio.close().catch(() => {}), 520);
+}
+
+function startAttention() {
+  if (state.attentionTimer) return;
+  const favicon = document.querySelector("link[rel='icon']");
+  const alertIcon = `data:image/svg+xml,${encodeURIComponent('<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><rect width="64" height="64" rx="14" fill="#0f8f6f"/><circle cx="46" cy="18" r="11" fill="#ff3b30"/><path fill="#fff" d="M18 24h22v6H18zm0 11h16v6H18z"/></svg>')}`;
+  state.attentionTimer = setInterval(() => {
+    state.attentionOn = !state.attentionOn;
+    document.title = state.attentionOn ? "* Nova zprava - MaalFlows" : state.originalTitle;
+    if (favicon) favicon.href = state.attentionOn ? alertIcon : state.originalFavicon;
+  }, 760);
+}
+
+function stopAttention() {
+  if (state.attentionTimer) clearInterval(state.attentionTimer);
+  state.attentionTimer = null;
+  state.attentionOn = false;
+  document.title = state.originalTitle;
+  const favicon = document.querySelector("link[rel='icon']");
+  if (favicon) favicon.href = state.originalFavicon;
+}
+
+function isVisitorMessageEvent(data) {
+  if (data.type !== "message:new") return false;
+  const messages = data.payload?.messages || [];
+  return messages[messages.length - 1]?.senderType === "visitor";
 }
 
 function flashTyping() {