feat(site): Comunidade section with Instagram posts the gym was tagged in

Per-gym Graph API /tags fetch with file cache and local thumbnails, section after the gallery, navbar link and admin page (Gestão > Site).

site/index.php

@@ -37,6 +37,7 @@ usort($whours, fn($x, $y) => strcmp((string) $x['open'], (string) $y['open']));
 $events      = site_active_events($pdo, $gid);   // time-limited events, banner below the hero
 $memberships = $on('mensalidades') ? site_memberships($pdo, $gid)  : [];
 $reviews     = $on('reviews')      ? site_reviews($gym)            : null;   // null when not configured / nothing qualifies
+$community   = $on('comunidade')   ? site_instagram($gym)          : [];     // tagged Instagram posts, [] when not configured
 $hero_img    = $gym['hero_image'] !== '' ? $gym['hero_image'] : 'site/assets/img/home.jpg';
 
 // ── Hero section ────────────────────────────────────────────────────────────────
@@ -128,6 +129,47 @@ $gallery_h2 = 'Conhece as nossas instalações';
 </section>
 <?php endif; ?>
 
+<?php
+// ── Comunidade (Instagram) ──────────────────────────────────────────────────────
+// Latest public posts where the gym was tagged (functions_instagram.php), cached
+// with local thumbnails; each tile opens the post on Instagram.
+if ($community):
+?>
+<section id="comunidade" class="community-section" aria-labelledby="comunidade-title">
+    <div class="container">
+        <div class="row justify-content-md-center mb-4">
+            <div class="col-lg-8">
+                <div class="section-title text-center deco">
+                    <span class="section-eyebrow">Comunidade</span>
+                    <h2 id="comunidade-title">A nossa comunidade</h2>
+                    <p class="section-subtitle">Os treinos de quem nos identifica no Instagram.</p>
+                </div>
+            </div>
+        </div>
+        <ul class="community-grid list-unstyled">
+            <?php foreach ($community as $p):
+                $cm_alt = trim(mb_strimwidth(preg_replace('/[[:space:]]+/u', ' ', $p['caption']), 0, 120, '…'));
+            ?>
+            <li>
+                <a class="community-post" href="<?= htmlspecialchars($p['permalink']) ?>" target="_blank" rel="noopener"
+                   aria-label="<?= htmlspecialchars('Publicação de @' . $p['username'] . ' no Instagram') ?>">
+                    <img src="<?= htmlspecialchars(base_url($p['image'])) ?>" alt="<?= htmlspecialchars($cm_alt) ?>" loading="lazy" decoding="async">
+                    <?php if ($p['type'] === 'VIDEO'): ?><i class="fas fa-play community-type" aria-hidden="true"></i>
+                    <?php elseif ($p['type'] === 'CAROUSEL_ALBUM'): ?><i class="far fa-clone community-type" aria-hidden="true"></i><?php endif; ?>
+                    <span class="community-user"><i class="fab fa-instagram" aria-hidden="true"></i> @<?= htmlspecialchars($p['username']) ?></span>
+                </a>
+            </li>
+            <?php endforeach; ?>
+        </ul>
+        <?php if (!empty($info['instagram'])): ?>
+        <p class="text-center mt-4 mb-0">
+            <a class="btn btn-outline-dark" href="<?= htmlspecialchars($info['instagram']) ?>" target="_blank" rel="noopener"><i class="fab fa-instagram me-1"></i> Identifica-nos no Instagram</a>
+        </p>
+        <?php endif; ?>
+    </div>
+</section>
+<?php endif; ?>
+
 <?php
 // ── Modalidades ─────────────────────────────────────────────────────────────────
 if ($modalidades):