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

app/api/banking/transactions/route.ts

@@ -1,8 +1,11 @@
 import { NextResponse } from "next/server";
 import { transactionService } from "@/services/transaction.service";
+import { requireAuth } from "@/lib/auth-utils";
 import type { Transaction } from "@/lib/types";
 
 export async function POST(request: Request) {
+  const authError = await requireAuth();
+  if (authError) return authError;
   try {
     const transactions: Transaction[] = await request.json();
     const result = await transactionService.createMany(transactions);
@@ -17,6 +20,9 @@ export async function POST(request: Request) {
 }
 
 export async function PUT(request: Request) {
+  const authError = await requireAuth();
+  if (authError) return authError;
+
   try {
     const transaction: Transaction = await request.json();
     const updated = await transactionService.update(
@@ -34,6 +40,9 @@ export async function PUT(request: Request) {
 }
 
 export async function DELETE(request: Request) {
+  const authError = await requireAuth();
+  if (authError) return authError;
+
   try {
     const { searchParams } = new URL(request.url);
     const id = searchParams.get("id");