Multi-select inventory items via checkboxes (select-all, shift-click
range, group header select) and apply bulk actions through a floating
toolbar: edit fields (shop, bin, price, THC/CBD), consume, checkout,
check in, and mark gone. Backend processes all operations in a single
SQLite transaction for atomicity.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
