isModelCached method
Check if a model is cached in OPFS
Returns true if the file exists in OPFS.
Implementation
Future<bool> isModelCached(String filename) async {
try {
final result = await _opfs.isModelCached(filename.toJS).toDart;
return result.toDart;
} catch (e) {
debugPrint('[WebOPFSService] Error checking cache for $filename: $e');
return false;
}
}