feat(overlay): handle WM_DISPLAYCHANGE and WM_SETTINGCHANGE for dynamic display updates

catser/overlay.py

@@ -76,6 +76,8 @@ WM_LBUTTONDOWN = 0x0201
 WM_LBUTTONUP = 0x0202
 WM_MOUSEMOVE = 0x0200
 WM_NCHITTEST = 0x0084
+WM_DISPLAYCHANGE = 0x007E
+WM_SETTINGCHANGE = 0x001A
 
 # Cursors
 IDC_ARROW = 32512
@@ -187,6 +189,7 @@ class OverlayWindow:
         on_mouse_down: Optional[Callable[[int, int], None]] = None,
         on_mouse_move: Optional[Callable[[int, int], None]] = None,
         on_mouse_up: Optional[Callable[[int, int], None]] = None,
+        on_display_change: Optional[Callable[[], None]] = None,
     ):
         self.width = width
         self.height = height
@@ -196,6 +199,7 @@ class OverlayWindow:
         self.on_mouse_down = on_mouse_down
         self.on_mouse_move = on_mouse_move
         self.on_mouse_up = on_mouse_up
+        self.on_display_change = on_display_change
 
         self.hwnd: Optional[int] = None
         self._wndproc_ref = None  # Prevent garbage collection of callback
@@ -352,6 +356,14 @@ class OverlayWindow:
                     self.on_mouse_up(pos.x, pos.y)
             return 0
 
+        elif msg in (WM_DISPLAYCHANGE, WM_SETTINGCHANGE):
+            if self.on_display_change:
+                try:
+                    self.on_display_change()
+                except Exception as e:
+                    logger.error(f"Error in on_display_change callback: {e}")
+            return 0
+
         elif msg == WM_DESTROY:
             user32.PostQuitMessage(0)
             return 0