UI tweaks for match columns step + auto hide empty columns

inventory-server/src/utils/db.js

@@ -1,21 +0,0 @@
-const { Pool } = require('pg');
-
-let pool;
-
-function initPool(config) {
-  pool = new Pool(config);
-  return pool;
-}
-
-async function getConnection() {
-  if (!pool) {
-    throw new Error('Database pool not initialized');
-  }
-  return pool.connect();
-}
-
-module.exports = {
-  initPool,
-  getConnection,
-  getPool: () => pool
-};