fix(csv): stream file export and build clipboard CSV off the UI isolate (#277) - #287
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…te (#277) - Write CSV to disk via IOSink in writeResultGridCsv instead of assembling one giant String before File.writeAsString. - Add resultGridAsCsvAsync (Isolate.run) and use it for Copy as CSV so large grids do not freeze the Flutter UI isolate. - Rebuild resultGridAsCsv with StringBuffer to reduce intermediate allocations. - Cover streaming and async paths with unit tests.
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Jul 27, 2026
fix(csv): stream file export and build clipboard CSV off the UI isolate (#277)
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Summary
writeResultGridCsv+IOSinkinstead of building one large string beforeFile.writeAsString.resultGridAsCsvAsync(Isolate.run) so large result grids no longer freeze the UI isolate.resultGridAsCsvto useStringBufferand add unit tests for streaming and async paths.Fixes #277.
Test plan
flutter test test/core/csv/result_grid_csv_test.dart