fixing categories 3rd normal form

src/services/apiClient.ts

@@ -433,10 +433,10 @@ export const fetchWatchedItems = (tokenOverride?: string): Promise<Response> =>
 
 export const addWatchedItem = (
   itemName: string,
-  category: string,
+  category_id: number,
   tokenOverride?: string,
 ): Promise<Response> =>
-  authedPost('/users/watched-items', { itemName, category }, { tokenOverride });
+  authedPost('/users/watched-items', { itemName, category_id }, { tokenOverride });
 
 export const removeWatchedItem = (
   masterItemId: number,