feat(gyms): per-gym brand colour; CrossFit pill follows it

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

site/includes/include.php

@@ -39,7 +39,7 @@ $canonical = $GLOBALS['_canonical_override'] ?? match ($page) {
 <meta name="description" content="<?= htmlspecialchars($page_desc) ?>">
 <meta name="keywords" content="fitness, ginásio, exercício, personal trainer, crossfit, box, aveiro, mira">
 <meta name="author" content="FitMe 3070">
-<meta name="theme-color" content="#C2D500">
+<meta name="theme-color" content="<?= htmlspecialchars(($gym_meta['brand_color'] ?? '') !== '' ? $gym_meta['brand_color'] : '#C2D500') ?>">
 <title><?= htmlspecialchars($page_title) ?></title>
 <link rel="canonical" href="<?= htmlspecialchars($canonical) ?>">
 <?php if (seo_noindex()): /* staging copies (e.g. fitme.andmore.pt) must not compete with the real domain */ ?>
@@ -85,6 +85,7 @@ $canonical = $GLOBALS['_canonical_override'] ?? match ($page) {
 
 <!-- Structured data -->
 <?= view('seo') ?>
+<?php if (($brand_css = gym_brand_css($gym_meta)) !== ''): ?><style><?= $brand_css ?></style><?php endif; ?>
 <?php include dirname(__DIR__, 2) . '/includes/env_ribbon.php';   // moldura de aviso fora de produção ?>
 </head>
 <body>