- «ضرایب تبدیل» opens directly on the global materials list (no topic/category
page); sidebar accordion: unique base materials (brand/spec prefixes
stripped) with expandable spec variants; search toolbar filters live.
- Detail binds to the selected material: reference unit (editable combobox
over global units, changes canonical_unit_id), conversion factors from
material_units incl. optional brand scope (restored برند field), add/edit/
delete with live preview (canonical-first wording), unassigned-units
warning section, global standard conversions kept.
- Self-referencing children excluded (only base+spec variants listed);
groups without variants selectable via their representative material.
- New lib/units.ts uniqueUnits(): unit dropdowns show each name once,
preferring the canonical coded row (kg/piece) over duplicate custom rows
with identical Persian names.
whqreza
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