Fixing dialogues and cutscenes, minor bug fixing

src/ScriptEngine.cpp

@@ -376,6 +376,22 @@ namespace ZL {
                     loc->requestReturnToMainMenu();
             });
 
+        // set_chat_unread(chat_index, unread [, preview_msg])
+        // chat_index: 0=first contact, 1=second, 2=third
+        // unread: true to mark as unread, false to mark as read
+        // preview_msg: optional string to show in the chat list preview (trimmed to 22 chars)
+        //   When unread=false and preview_msg is omitted, preview auto-updates from chat history.
+        api.set_function("set_chat_unread",
+            [loc](int chatIndex, bool unread, sol::object previewMsg) {
+                if (!loc->requestSetChatUnread) {
+                    std::cerr << "[script] set_chat_unread: callback not wired\n";
+                    return;
+                }
+                const std::string msg = previewMsg.is<std::string>()
+                    ? previewMsg.as<std::string>() : "";
+                loc->requestSetChatUnread(chatIndex, unread, msg);
+            });
+
         api.set_function("set_chat_callbacks",
             [this_impl = impl.get()](sol::object cb0, sol::object cb1, sol::object cb2) {
                 if (cb0.is<sol::protected_function>()) this_impl->chatOpenCallbacks[0] = cb0.as<sol::protected_function>();