feat: integrate authentication and password management features, including bcrypt for hashing and NextAuth for session handling

app/api/banking/transactions/clear-categories/route.ts

@@ -1,7 +1,10 @@
 import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
+import { requireAuth } from "@/lib/auth-utils";
 
 export async function POST() {
+  const authError = await requireAuth();
+  if (authError) return authError;
   try {
     const result = await prisma.transaction.updateMany({
       where: {