fix: responsive toolbar and Chromium resize on screen geometry change

browser.py

@@ -128,6 +128,29 @@ class CDP:
         threading.Thread(target=self._send, args=(method, params),
                          daemon=True).start()
 
+    def resize_window(self, x, y, w, h):
+        """Move and resize the Chrome window via CDP Browser.setWindowBounds."""
+        if not self.ready:
+            return
+        import websocket
+        with self._lock:
+            try:
+                ws = websocket.create_connection(self._ws_url(), timeout=3)
+                ws.send(json.dumps({"id": 1, "method": "Browser.getWindowForTarget"}))
+                resp = json.loads(ws.recv())
+                wid = resp.get("result", {}).get("windowId")
+                if wid:
+                    ws.send(json.dumps({"id": 2,
+                        "method": "Browser.setWindowBounds",
+                        "params": {"windowId": wid,
+                                    "bounds": {"left": x, "top": y,
+                                               "width": w, "height": h,
+                                               "windowState": "normal"}}}))
+                    ws.recv()
+                ws.close()
+            except Exception as e:
+                print(f"CDP resize error: {e}")
+
     def navigate(self, url):
         self._async("Page.navigate", {"url": url})
 
@@ -486,6 +509,21 @@ class KioskOverlay(QWidget):
         self.bm_panel = BookmarkPanel(cdp, self)
         self.show()
 
+        # Reflow toolbar and Chrome when screen/RDP size changes
+        screen = QApplication.instance().primaryScreen()
+        screen.geometryChanged.connect(self._on_screen_resize)
+
+    def _on_screen_resize(self, rect):
+        global SCREEN_W, SCREEN_H
+        SCREEN_W, SCREEN_H = rect.width(), rect.height()
+        self.setGeometry(0, 0, SCREEN_W, TOP_H)
+        self.resize(SCREEN_W, TOP_H)
+        # Resize Chrome after brief delay so X has settled
+        QTimer.singleShot(300, self._resize_chrome)
+
+    def _resize_chrome(self):
+        self.cdp.resize_window(0, TOP_H, SCREEN_W, SCREEN_H - TOP_H)
+
     def _build_toolbar(self):
         bar = QWidget(); bar.setFixedHeight(TOOLBAR_H)
         bar.setStyleSheet(f"background:{TOOLBAR_COLOR};")