some improvements from claude

db.js

@@ -12,12 +12,22 @@ const pool = new Pool({
   database: process.env.DB_DATABASE,
   password: process.env.DB_PASSWORD,
   port: process.env.DB_PORT,
+  // Add connection pool settings for better performance
+  max: 20, // Maximum number of clients
+  idleTimeoutMillis: 30000, // How long a client is allowed to remain idle before being closed
+  connectionTimeoutMillis: 2000, // How long to wait for a connection
   // Optional: Add SSL configuration if required by your database provider
   // ssl: {
   //   rejectUnauthorized: false // Adjust as needed
   // }
 });
 
+// Listen for errors on the pool
+pool.on('error', (err) => {
+  console.error('Unexpected error on idle client', err);
+  process.exit(-1);
+});
+
 // Test the database connection on startup
 pool.connect((err, client, release) => {
   if (err) {
@@ -31,9 +41,22 @@ pool.connect((err, client, release) => {
   }
 });
 
-// Export a query function to interact with the database
+// Export functions to interact with the database
 module.exports = {
   query: (text, params) => pool.query(text, params),
-  // You can add more specific database functions here if needed
-  // Example: getClient: () => pool.connect()
+  // Add transaction helper
+  withTransaction: async (callback) => {
+    const client = await pool.connect();
+    try {
+      await client.query('BEGIN');
+      const result = await callback(client);
+      await client.query('COMMIT');
+      return result;
+    } catch (e) {
+      await client.query('ROLLBACK');
+      throw e;
+    } finally {
+      client.release();
+    }
+  }
 };