Fix Windows notification color inversion

src/kolibri_app/application.py

@@ -19,7 +19,7 @@
     import win32gui
 
     from kolibri_app.server_manager_windows import WindowsServerManager as ServerManager
-    from kolibri_app.taskbar_icon import KolibriTaskBarIcon
+    from kolibri_app.windows.taskbar_icon import KolibriTaskBarIcon
     from kolibri_app.windows_registry import is_webview2_installed
 else:
     from kolibri.core.device.utils import app_initialize_url

src/kolibri_app/constants.py

@@ -11,6 +11,12 @@
 # Windows specific constants
 TRAY_ICON_ICO = "icons/kolibri.ico"
 SERVICE_NAME = "Kolibri"
+# Explicit AppUserModelID for notification attribution. Without it, Windows
+# auto-generates an identity for the tray icon and renders the notification
+# header from a cached copy of the tray HICON, which can show with swapped
+# colours (see issue #184). Registered in the registry with a DisplayName and
+# IconUri so toasts show "Kolibri" and the icon file directly.
+APP_USER_MODEL_ID = "LearningEquality.Kolibri"
 # Microsoft's official identifier for the WebView2 Runtime, used for registry checks.
 # Source: https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/distribution?tabs=dotnetcsharp
 WEBVIEW2_RUNTIME_GUID = "{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}"

src/kolibri_app/windows/__init__.py

@@ -0,0 +1,6 @@
+"""Windows-only components of the Kolibri app.
+
+Modules in this package import ``pywin32``/Win32 APIs at import time and must
+only be imported when running on Windows (guard with
+``kolibri_app.constants.WINDOWS``).
+"""