refactor: clean up imports and enhance type definitions across multiple components for improved clarity and maintainability

components/ui/category-filter-combobox.tsx

@@ -2,7 +2,6 @@
 
 import { useState, useMemo } from "react";
 import { Button } from "@/components/ui/button";
-import { Badge } from "@/components/ui/badge";
 import {
   Command,
   CommandEmpty,

components/ui/use-toast.ts

@@ -15,7 +15,7 @@ type ToasterToast = ToastProps & {
   action?: ToastActionElement;
 };
 
-const actionTypes = {
+const _actionTypes = {
   ADD_TOAST: "ADD_TOAST",
   UPDATE_TOAST: "UPDATE_TOAST",
   DISMISS_TOAST: "DISMISS_TOAST",
@@ -29,7 +29,7 @@ function genId() {
   return count.toString();
 }
 
-type ActionType = typeof actionTypes;
+type ActionType = typeof _actionTypes;
 
 type Action =
   | {