www/save_note.php

<?php
require_once __DIR__ . "/api/protecao.php";
require __DIR__ . "/api/db.php";

$uid  = $_POST['uid']  ?? '';
$note = $_POST['note'] ?? '';

$stmt = $pdo->prepare("
    UPDATE contadores
    SET note = ?
    WHERE uid = ?
");

$stmt->execute([$note, $uid]);

header("Location: console.php");