diff --git a/tools/chatgui/src/callwindow.cpp b/tools/chatgui/src/callwindow.cpp
index 3f6b8cab..e8a123fc 100644
--- a/tools/chatgui/src/callwindow.cpp
+++ b/tools/chatgui/src/callwindow.cpp
@@ -25,8 +25,6 @@
 #include <cstring>
 
 extern "C" {
-#include "call/call.h"
-#include "../../lib/mem.h"
 #include "../../lib/debug_config.h"
 }
 
@@ -311,7 +309,9 @@ CallWindow::CallWindow(QWidget* parent)
     connect(m_continueBtn, &QPushButton::clicked, this, [this] {
         if (m_state != WaitDecision) return;
         DEBUG_INFO(DEBUG_CATEGORY_CALL, "desktop caller overrides phone busy id=%016llx", (unsigned long long)m_callId);
-        postCallFn(call_continue_trampoline, m_callId);
+        if (gui_bridge_call_action(GUI_CALL_CONTINUE, m_callId) < 0) {
+            m_statusLabel->setText(callText("Could not send the call command")); return;
+        }
         setState(Outgoing);
         SoundManager::instance()->playLoop("call_connecting");
     });
@@ -578,26 +578,22 @@ void CallWindow::applyVideo() {
     m_video->setVideo(enabled, m_camera->currentData().toByteArray(), size.width(), size.height(), m_codec->currentData().toInt(), fps ? fps : 30);
 }
 
-void CallWindow::postCallFn(void (*fn)(void*), uint64_t callId) {
-    struct call_id_arg* a = (struct call_id_arg*)u_malloc(sizeof(*a));
-    if (!a) return;
-    a->inst = gui_bridge_get_inst();
-    a->call_id = callId;
-    gui_bridge_post_uasync_fn(fn, a);
-}
-
 void CallWindow::onAccept() {
+    if (gui_bridge_call_action(GUI_CALL_ACCEPT, m_callId) < 0) {
+        m_statusLabel->setText(callText("Could not send the call command")); return;
+    }
     SoundManager::instance()->stopLoop();
     setState(Active);
-    postCallFn(call_accept_trampoline, m_callId);
 }
 
 void CallWindow::onDecline() {
-    postCallFn(call_decline_trampoline, m_callId);
+    if (gui_bridge_call_action(GUI_CALL_DECLINE, m_callId) < 0)
+        m_statusLabel->setText(callText("Could not send the call command"));
 }
 
 void CallWindow::onHangup() {
-    postCallFn(call_hangup_trampoline, m_callId);
+    if (gui_bridge_call_action(GUI_CALL_HANGUP, m_callId) < 0)
+        m_statusLabel->setText(callText("Could not send the call command"));
 }
 
 void CallWindow::onMuteToggled(bool checked) {
@@ -615,8 +611,9 @@ void CallWindow::onDeviceChanged(int index) {
 
 void CallWindow::closeEvent(QCloseEvent* event) {
     m_video->stop(); m_videoCall = 0;
-    if (m_state == Outgoing || m_state == Ringing || m_state == Active || m_state == WaitDecision)
-        postCallFn(call_hangup_trampoline, m_callId);
+    if ((m_state == Outgoing || m_state == Ringing || m_state == Active || m_state == WaitDecision)
+        && gui_bridge_call_action(GUI_CALL_HANGUP, m_callId) < 0)
+        DEBUG_WARN(DEBUG_CATEGORY_CALL, "call window closed without queued hangup id=%llu", (unsigned long long)m_callId);
     emit closed(m_callId);
     event->accept();
 }
diff --git a/tools/chatgui/src/callwindow.h b/tools/chatgui/src/callwindow.h
index 5227a1dd..f1bd644f 100644
--- a/tools/chatgui/src/callwindow.h
+++ b/tools/chatgui/src/callwindow.h
@@ -13,8 +13,10 @@ class QSpinBox;
 class CallVideoEngine;
 class CallVideoWindow;
 
-/* Окно звонка: состояния Outgoing (пытаемся связаться), Ringing (звоним),
- * Incoming (принять/отклонить), Active (идёт разговор, таймер), Ended (завершён). */
+/* GUI-окно звонка: Outgoing (соединение), Ringing (доставлен вызов), Incoming (принять/отклонить),
+ * Active (разговор/таймер), Ended (завершён), WaitDecision (явное разрешение звонить занятому телефону).
+ * Команды передаются через typed API моста без заимствованного instance/heap payload в GUI.
+ * Отказ постановки сохраняет состояние и показывает ошибку; видео принадлежит окну, аудио — общему CallAudioEngine. */
 class CallWindow : public QWidget {
     Q_OBJECT
 public:
@@ -50,7 +52,6 @@ private slots:
 private:
     void updateButtons();
     void populateDeviceCombo();
-    void postCallFn(void (*fn)(void*), uint64_t callId);
     void applyVideo();
     void updateVideoPresentation();
     CallVideoEngine* m_video;