Implement Excel-style filters (SKU, ASIN, Title, Line) across GRID, WEEKLY SALES, and FC26 tabs

types.ts

@@ -27,6 +27,16 @@ export interface FilterState {
   vendorStock: string[]; // Added Vendor Stock filter
   woc: string[]; // Added Weeks of Coverage filter
   bulkSearch: string; // Added Bulk Search support
+  columnFilters: Record<string, ColumnFilterCondition>; // Added Excel-style column filters
+}
+
+export interface ColumnFilterCondition {
+  textFilter?: {
+    operator: 'equals' | 'notEquals' | 'contains' | 'notContains' | 'startsWith' | 'notStartsWith' | 'endsWith' | 'notEndsWith';
+    value: string;
+  };
+  selectedValues?: string[];
+  sort?: 'asc' | 'desc';
 }
 
 export interface GrowthMetric {