chore: griddy work

src/Griddy/core/columnMapper.ts

@@ -2,6 +2,7 @@ import type { ColumnDef } from '@tanstack/react-table'
 
 import type { GriddyColumn, SelectionConfig } from './types'
 
+import { createOperatorFilter } from '../features/filtering'
 import { DEFAULTS, SELECTION_COLUMN_ID, SELECTION_COLUMN_SIZE } from './constants'
 
 /**
@@ -38,10 +39,21 @@ export function mapColumns<T>(
       meta: { griddy: col },
       minSize: col.minWidth ?? DEFAULTS.minColumnWidth,
       size: col.width,
-      // For function accessors, TanStack can't auto-detect the sort type, so default to 'auto'
-      sortingFn: col.sortFn ?? (isStringAccessor ? undefined : 'auto') as any,
     }
-    if (col.filterFn) def.filterFn = col.filterFn
+
+    // For function accessors, TanStack can't auto-detect the sort type, so provide a default
+    if (col.sortFn) {
+      def.sortingFn = col.sortFn
+    } else if (!isStringAccessor && col.sortable !== false) {
+      // Use alphanumeric sorting for function accessors
+      def.sortingFn = 'alphanumeric'
+    }
+
+    if (col.filterFn) {
+      def.filterFn = col.filterFn
+    } else if (col.filterable) {
+      def.filterFn = createOperatorFilter()
+    }
     return def
   })