Type Alias ColumnDrawerBinding

ColumnDrawerBinding:
    | { kind: "searchFilters"; key: keyof SearchFilters }
    | { kind: "selectedSuppliers" }
    | {
        kind: "userSettingsRange";
        minKey: keyof UserSettings;
        maxKey: keyof UserSettings;
    }

Describes where a column's drawer-section value reads/writes in app state. DrawerSearchPanel dispatches on .kind to pull/push the right slice — columns don't need to know how the context is structured.