Critical:
- Add deleted column: deleteMeasurement now soft-deletes, merge filters
out deleted items based on updatedAt (was: deletions were resurrected)
- Replace btoa with UTF-8-safe encodeBase64 utility for Hermes compat
Important:
- Preserve createdAt when overwriting duplicate-date measurements
- Add 15s AbortController timeout to all WebDAV fetch calls
- Revert broken date prefilling regression (MeasurementForm)
- getAllMeasurements/latest/byDate now filter deleted records
- Replace Dimensions with useWindowDimensions for rotation awareness
- Replace silent catch with console.warn in HistoryScreen
Tests: 8 new tests for deletion merge cases and soft-delete queries
