Measure uasync CPU load and display it in desktop and Android GUIs

Sample thread CPU usage without waking idle loops, expose a one-second moving average, and refresh compact GUI indicators at 3 Hz while visible on Android. Add load and bridge regression coverage, streaming notes, and task list cleanup.

tools/chatgui/src/mainwindow.cpp

@@ -171,6 +171,18 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
         setupConnects();
     }
     connect(m_autoPlayTimer, &QTimer::timeout, this, &MainWindow::autoPlayTimerTick);
+    m_cpuLoadTimer = new QTimer(this);
+    m_cpuLoadTimer->setTimerType(Qt::PreciseTimer);
+    connect(m_cpuLoadTimer, &QTimer::timeout, this, [this] {
+        auto* inst = gui_bridge_get_inst();
+        if (!m_node || !m_node->isRunning() || !inst || !gui_bridge_is_uasync_ready()) {
+            m_cpuLoadPending = false; m_channelList->setCpuLoad(0); return;
+        }
+        if (m_cpuLoadPending) return;
+        m_cpuLoadPending = gui_bridge_request_cpu_load() != 0;
+    });
+    m_cpuLoadTimer->start(333);
+    DEBUG_DEBUG(DEBUG_CATEGORY_SYS, "desktop CPU indicator polling started: period=333ms");
 
 #ifndef _WIN32
     std::signal(SIGINT, unixSignalHandler);
@@ -183,6 +195,9 @@ MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
 
 MainWindow::~MainWindow() {
     s_mainWindow = nullptr;
+    m_cpuLoadTimer->stop();
+    gui_bridge_set_cpu_load_cb(nullptr);
+    DEBUG_DEBUG(DEBUG_CATEGORY_SYS, "desktop CPU indicator polling stopped");
     if (m_messageNotification) m_messageNotification->dismiss("shutdown");
     m_messageNotification.reset();
     delete AvatarManager::instance();
@@ -407,6 +422,11 @@ void MainWindow::setupSoundFromConfig() {
 
 void MainWindow::setupBridgeCallbacks() {
     s_mainWindow = this;
+    gui_bridge_set_cpu_load_cb([](int percent) {
+        if (!s_mainWindow) return;
+        s_mainWindow->m_cpuLoadPending = false;
+        s_mainWindow->m_channelList->setCpuLoad(percent);
+    });
     gui_bridge_set_member_files_response_cb([](const uint8_t* data, int length) {
         DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "member_files: GUI response route bytes=%d browser=%d",
                     length, (int)(s_mainWindow && s_mainWindow->m_fileBrowser));
@@ -554,6 +574,8 @@ void MainWindow::setupBridgeCallbacks() {
     gui_bridge_set_network_changed_cb([](int type) {
         if (!s_mainWindow) return;
         if (type == 13) {
+            s_mainWindow->m_cpuLoadPending = false;
+            s_mainWindow->m_channelList->setCpuLoad(0);
             s_mainWindow->m_accountList->model()->setRadioState(0, false, false);
             s_mainWindow->m_messageList->clearDmCallRoute();
             s_mainWindow->m_channelList->clearDmPresence();