The root-level overlay back callback was keyed only on the overlay state, so after an
album drill-down or tab switch the NavHost could re-register its own back callback
above ours and regain priority — one back press then popped Erkunden → Home instead
of dismissing the overlay ("sometimes" bug). Key the DisposableEffect on
currentBackEntry as well, so the callback is removed and re-added (bumped to the top
of the OnBackPressedDispatcher) after every navigation while an overlay is open.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
HoneyandClaude Opus 4.8
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