Add unread chat indicator

public/admin.css

@@ -95,6 +95,8 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
 }
 .conversation-item.active { background: #eaf6f1; }
 .conversation-item.fresh { animation: pulse 1.2s ease-in-out 4; }
+.conversation-item.unread { background: #fffdf4; }
+.conversation-item.unread.active { background: #eaf6f1; }
 .conversation-open {
   min-width: 0;
   text-align: left;
@@ -108,6 +110,31 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
 }
 .conversation-open:hover { filter: none; background: #f3f7f4; }
 .row { display: flex; justify-content: space-between; gap: 10px; align-items: center; }
+.visitor-row { min-width: 0; }
+.visitor-name-wrap {
+  min-width: 0;
+  display: inline-flex;
+  align-items: center;
+  gap: 7px;
+}
+.visitor-name-wrap strong {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.unread-dot {
+  width: 9px;
+  height: 9px;
+  flex: 0 0 auto;
+  border-radius: 50%;
+  background: #c9d4ce;
+}
+.conversation-item.unread .unread-dot {
+  background: #ff3b30;
+  box-shadow: 0 0 0 0 rgb(255 59 48 / 55%);
+  animation: unreadPulse 1.25s ease-out infinite;
+}
 .status {
   font-size: 12px;
   color: white;
@@ -492,6 +519,12 @@ pre {
   50% { background: #dff7eb; }
 }
 
+@keyframes unreadPulse {
+  0% { box-shadow: 0 0 0 0 rgb(255 59 48 / 55%); }
+  70% { box-shadow: 0 0 0 8px rgb(255 59 48 / 0%); }
+  100% { box-shadow: 0 0 0 0 rgb(255 59 48 / 0%); }
+}
+
 @media (max-width: 820px) {
   body { overflow: auto; }
   .app { height: auto; min-height: 100vh; grid-template-columns: 1fr; overflow: visible; }

public/admin.js

@@ -199,6 +199,8 @@ async function openConversation(id) {
   state.activeId = id;
   const data = await api(`/api/admin/conversations/${id}`);
   state.active = data;
+  const index = state.conversations.findIndex((item) => item.id === id);
+  if (index >= 0) state.conversations[index] = { ...state.conversations[index], ...data.conversation };
   renderConversations();
   renderActive();
 }
@@ -246,10 +248,15 @@ function renderSite() {
 function renderConversations() {
   const conversations = filteredConversations();
   $("#conversationList").innerHTML = conversations.length ? conversations.map((item) => `
-    <article class="conversation-item ${item.id === state.activeId ? "active" : ""} ${item.status === "new" ? "fresh" : ""}">
+    <article class="conversation-item ${item.id === state.activeId ? "active" : ""} ${item.hasUnread ? "unread fresh" : ""}">
       <button class="conversation-open" type="button" data-open="${item.id}">
-        <span class="row"><strong>${escapeHtml(item.visitor.name || item.visitor.email || "Navstevnik")}</strong>${item.imageCount ? `<span class="photo-count">foto ${item.imageCount}</span>` : ""}</span>
+        <span class="row visitor-row">
-        <span class="preview">${escapeHtml(item.lastBody || "")}</span>
+          <span class="visitor-name-wrap">
+            <span class="unread-dot" aria-label="${item.hasUnread ? "Neprecteno" : "Precteno"}"></span>
+            <strong>${escapeHtml(item.visitor.name || item.visitor.email || "Navstevnik")}</strong>
+          </span>
+          ${item.imageCount ? `<span class="photo-count">foto ${item.imageCount}</span>` : ""}
+        </span>
         <span class="visitor-facts">
           <span title="Zeme">${visitorCountry(item)}</span>
           <span title="Doba na webu">${formatDuration(item.sessionSeconds)}</span>

server.js

@@ -162,6 +162,16 @@ function initDb() {
     CREATE INDEX IF NOT EXISTS idx_conversations_site_status ON conversations(site_id, status, last_message_at);
     CREATE INDEX IF NOT EXISTS idx_messages_conversation ON messages(conversation_id, created_at);
   `);
+  if (ensureColumn("conversations", "admin_seen_at", "TEXT")) {
+    db.prepare("UPDATE conversations SET admin_seen_at = last_message_at WHERE admin_seen_at IS NULL").run();
+  }
+}
+
+function ensureColumn(table, column, definition) {
+  const exists = db.prepare(`PRAGMA table_info(${table})`).all().some((item) => item.name === column);
+  if (exists) return false;
+  db.exec(`ALTER TABLE ${table} ADD COLUMN ${column} ${definition}`);
+  return true;
 }
 
 function seedDefaults() {
@@ -261,6 +271,12 @@ function adminConversations(res) {
       (SELECT body FROM messages WHERE conversation_id = c.id ORDER BY id DESC LIMIT 1) AS last_body,
       (SELECT COUNT(*) FROM messages WHERE conversation_id = c.id) AS message_count,
       (SELECT COUNT(*) FROM attachments WHERE conversation_id = c.id AND mime_type LIKE 'image/%') AS image_count,
+      EXISTS(
+        SELECT 1 FROM messages unread
+        WHERE unread.conversation_id = c.id
+          AND unread.sender_type = 'visitor'
+          AND datetime(unread.created_at) > datetime(COALESCE(c.admin_seen_at, '1970-01-01 00:00:00'))
+      ) AS has_unread,
       (SELECT COUNT(*) FROM conversations vc WHERE vc.site_id = c.site_id AND vc.visitor_token = c.visitor_token) AS visitor_conversation_count
     FROM conversations c
     JOIN sites s ON s.id = c.site_id
@@ -273,7 +289,8 @@ function adminConversations(res) {
 function adminConversation(res, url) {
   const conversation = findConversation(publicIdFrom(url));
   if (!conversation) return json(res, 404, { error: "conversation_not_found" });
-  return json(res, 200, conversationDetails(conversation));
+  markConversationSeen(conversation.id);
+  return json(res, 200, conversationDetails(findConversation(conversation.public_id)));
 }
 
 async function updateSite(req, res) {
@@ -377,7 +394,7 @@ async function createConversation(req, res) {
   });
   const insert = insertConversation();
 
-  const conversation = db.prepare("SELECT * FROM conversations WHERE id = ?").get(insert);
+  const conversation = findConversation(publicId);
   publish("admin", { type: "conversation:new", conversation: formatConversationSummary(conversation) });
   publishConversation(conversation, { type: "message:new", payload: conversationDetails(conversation) });
   return json(res, 201, conversationDetails(conversation));
@@ -392,6 +409,7 @@ async function createVisitorMessage(req, res, url) {
   const messageId = insertMessage(conversation.id, "visitor", conversation.visitor_name || "Visitor", String(body.message).trim());
   saveAttachments(conversation.id, messageId, body.attachments || []);
   updateVisitorContext(conversation.id, body);
+  markConversationUnread(conversation.id);
   bumpConversation(conversation.id, conversation.status === "resolved" ? "open" : conversation.status);
   const updated = findConversation(conversation.public_id);
   publishConversation(updated, { type: "message:new", payload: conversationDetails(updated) });
@@ -407,6 +425,7 @@ async function createAdminMessage(req, res, url) {
   const messageId = insertMessage(conversation.id, "admin", req.adminUser.username, String(body.message || "").trim());
   saveAttachments(conversation.id, messageId, body.attachments || []);
   bumpConversation(conversation.id, conversation.status === "new" ? "open" : conversation.status);
+  markConversationSeen(conversation.id);
   const updated = findConversation(conversation.public_id);
   publishConversation(updated, { type: "message:new", payload: conversationDetails(updated) });
   return json(res, 201, conversationDetails(updated));
@@ -575,6 +594,7 @@ function formatConversationSummary(row) {
     lastBody: row.last_body,
     messageCount: row.message_count,
     imageCount: row.image_count || 0,
+    hasUnread: Boolean(row.has_unread),
     pageCount: pageCount(row.browsing_history_json),
     sessionSeconds: sessionSeconds(row.browsing_history_json, row.created_at),
     visitorConversationCount: row.visitor_conversation_count || 1,
@@ -622,6 +642,15 @@ function getDefaultSite() {
 function findConversation(publicId) {
   return db.prepare(`
     SELECT c.*, s.site_key,
+      (SELECT body FROM messages WHERE conversation_id = c.id ORDER BY id DESC LIMIT 1) AS last_body,
+      (SELECT COUNT(*) FROM messages WHERE conversation_id = c.id) AS message_count,
+      (SELECT COUNT(*) FROM attachments WHERE conversation_id = c.id AND mime_type LIKE 'image/%') AS image_count,
+      EXISTS(
+        SELECT 1 FROM messages unread
+        WHERE unread.conversation_id = c.id
+          AND unread.sender_type = 'visitor'
+          AND datetime(unread.created_at) > datetime(COALESCE(c.admin_seen_at, '1970-01-01 00:00:00'))
+      ) AS has_unread,
       (SELECT COUNT(*) FROM conversations vc WHERE vc.site_id = c.site_id AND vc.visitor_token = c.visitor_token) AS visitor_conversation_count
     FROM conversations c
     JOIN sites s ON s.id = c.site_id
@@ -629,6 +658,14 @@ function findConversation(publicId) {
   `).get(publicId);
 }
 
+function markConversationSeen(conversationId) {
+  db.prepare("UPDATE conversations SET admin_seen_at = CURRENT_TIMESTAMP WHERE id = ?").run(conversationId);
+}
+
+function markConversationUnread(conversationId) {
+  db.prepare("UPDATE conversations SET admin_seen_at = NULL WHERE id = ?").run(conversationId);
+}
+
 function publicIdFrom(url) {
   const parts = url.pathname.split("/").filter(Boolean);
   return parts[parts.indexOf("conversations") + 1];