1.1.20

fix: inventory UX improvements and split/history fixes (#112)

Summary
A batch of inventory UX fixes and improvements.

Inventory sorting
Default sort: updated_at DESC, name ASC, entity_id ASC - most recently active items float to top
Category schema import
_infer_category_schemas was using "dropdown" instead of "select" for low-cardinality fields - fixed
Price import
_price_total back-calculation no longer hard-errors when qty=0; falls back to qty=1
Split / transform / merge activity history
Operation noise events suppressed from activity feed
Each operation shows exactly one clean summary row
Added item.transform label and detail handler
Split UX
Fixed ValueError on uuid.UUID(parent_location_id) - replaced with _parse_uuid() helper
QTY column header: QTY Carat (clean, no abbreviation in parens)
Weight column header: Weight (Carat) with unit name
When sell_by is a weight unit: child weight is static/derived (grey italic)
When sell_by is pieces: pieces column hidden (redundant with QTY)
Navigation
Category tabs and status cards strip skus and q from URL - clicking a tab after a split/merge result returns to clean catalog view