clearAll method
Wipe everything (logout, account switch, host-requested clear).
Implementation
Future<void> clearAll() async {
_epoch++;
_captureTimer?.cancel();
_captureTimer = null;
_captureRerun = false;
_pendingSharedCapture = null;
await _drainWrites();
_chains.clear();
_graph = emptyGraph();
_manifest.clear();
_currentScreen = null;
_lastNavigatedScreen = null;
_lastCapturedScreen = null;
_pendingNavigations.clear();
await _store.clear();
}