Update frontend login page.jsx และ backend

backend/src/utils/passwords.js

@@ -1,4 +1,14 @@
-import bcrypt from 'bcrypt';
+// FILE: src/utils/passwords.js
+// Password hashing and verification utilities
+// - Uses bcrypt for secure password hashing
+// - Provides hashPassword(plain) and verifyPassword(plain, hash) functions
+// - hashPassword returns a promise that resolves to the hashed password
+// - verifyPassword returns a promise that resolves to true/false
+// - Uses 10 salt rounds for hashing
+// - Assumes bcrypt package is installed
+// - Suitable for user authentication systems
+// - Can be used in user registration and login flows
+import bcrypt from "bcrypt";
 export async function hashPassword(plain) {
   const saltRounds = 10;
   return bcrypt.hash(plain, saltRounds);