fix: handle notification changes and timing review text safely

- Dismiss stale overlay progress when notification mode changes
- Validate and forward combined timing review text
- Keep macOS timing preview socket paths within system limits

changes/anki-update-notifications.md

@@ -0,0 +1,4 @@
+type: fixed
+area: anki
+
+- Dismissed active overlay card-update progress when notification settings switch to OSD before an update finishes.