feat(site): root opens the main gym; other gyms as navbar buttons

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

CLAUDE.md

@@ -78,7 +78,7 @@ Sistema → Auditoria (`platform.php?tool=audit`).
 Since 2026-09-25, one install serves several physical gyms: the `gyms` table, one URL
 folder per gym (`/3070/`, `/<postal-code>/`), content rows carry `gym_id`, and the
 backoffice has an "a editar" gym switcher (`admin_gym_id()` /
-`admin_gym()` in `config/functions_gyms.php`). `/` and `/home` 301 to the default gym.
+`admin_gym()` in `config/functions_gyms.php`). `/` and `/home` 301 to the default gym (`is_default`); the other published gyms appear as highlighted buttons (`.gym-switch-btn`) at the right end of the public navbar (`site/includes/navbar.php`). `site/gym_chooser.php` is no longer used.
 An unpublished gym 404s publicly but previews for staff.
 
 ## platform-tools

site/assets/css/style.css

@@ -408,6 +408,29 @@ section[id] {
   color: #fff !important;
 }
 
+/* ── Other-gym button (right end of the navbar) ────────────────────────────── */
+.gym-switch-btn {
+  display: inline-block;
+  background: var(--fitme-accent);
+  color: var(--fitme-dark);
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: .5px;
+  text-decoration: none;
+  white-space: nowrap;
+  border: 2px solid var(--fitme-accent);
+  border-radius: var(--fitme-radius);
+  padding: 6px 16px;
+  transition: background-color var(--fitme-transition), color var(--fitme-transition);
+}
+
+.gym-switch-btn:hover,
+.gym-switch-btn:focus-visible {
+  background: var(--fitme-dark);
+  border-color: var(--fitme-dark);
+  color: var(--fitme-accent);
+}
+
 /* ── Sticky Navbar ─────────────────────────────────────────────────────────── */
 .navbar-toggler {
   min-width: 44px;

site/includes/navbar.php

@@ -47,6 +47,22 @@ $logo_dims = svg_img_dims_attr(dirname(__DIR__, 2) . '/' . $logo_rel);
         </li>
         <?php endforeach; ?>
       </ul>
+      <?php
+      // Other published gyms: the main gym opens first, the rest are
+      // highlighted buttons at the right end of the bar.
+      $other_gyms = [];
+      if (!empty($GLOBALS['pdo'])) {
+          foreach (db_gyms_published($GLOBALS['pdo']) as $g) {
+              if ((int) $g['id'] !== (int) current_gym()['id']) $other_gyms[] = $g;
+          }
+      }
+      if ($other_gyms): ?>
+      <div class="gym-switch d-flex flex-wrap gap-2 ms-lg-auto py-2 py-lg-0 pe-lg-3">
+        <?php foreach ($other_gyms as $g): ?>
+        <a class="gym-switch-btn" href="<?= htmlspecialchars(gym_url($g)) ?>"><?= htmlspecialchars($g['name']) ?></a>
+        <?php endforeach; ?>
+      </div>
+      <?php endif; ?>
     </div>
   </nav>
 </header>

site/index.php

@@ -5,13 +5,15 @@ $current_uri_2 = '';
 
 // No gym in the URL (/, /home, old links): send people to a gym page. With a
 // single published gym that is a 301 to it (query string kept, e.g.
-// ?agendar=ok); with more, the gym chooser.
+// ?agendar=ok); with more, the main (default) gym — the others are reached
+// from the navbar's «Ginásios» menu.
 if (($_GET['gym'] ?? '') === '') {
     require_once __DIR__ . '/../config/db.php';
     require_once __DIR__ . '/../config/functions.php';
     $published = db_gyms_published($pdo);
-    if (count($published) > 1) { require __DIR__ . '/gym_chooser.php'; exit; }
-    $to  = $published[0] ?? db_gyms_default($pdo) ?? gym_fallback();
+    $main = null;
+    foreach ($published as $g) { if ((int) ($g['is_default'] ?? 0) === 1) { $main = $g; break; } }
+    $to  = $main ?? $published[0] ?? db_gyms_default($pdo) ?? gym_fallback();
     $qs  = $_SERVER['QUERY_STRING'] ?? '';
     header('Location: ' . gym_url($to) . ($qs !== '' ? '?' . $qs : ''), true, 301);
     exit;