- Add _wide_table.html.erb partial (server-rendered pivot table)
- Add load_measurements helper in controller to prepare @wide_groups and
@wide_quantities for all mutating actions
- Update index view to render the wide_table partial in #measurements-wide
- Add/update create, destroy, update turbo_stream views to refresh the
wide table atomically after each mutation
- Remove buildWideTable() and editMeasurementWide() from application.js
- Fix create.turbo_stream.erb condition (empty readouts are vacuously all persisted)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
