Initial import of fitme3070.pt platform

Plain-PHP fleet platform with id.andmore.pt SSO. Wires shared/platform-tools
as a submodule (platform_update, backups, git/migration tools) like the other
platforms.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

includes/navbar.php

@@ -0,0 +1,18 @@
+<?php
+// Standalone top navbar — only outputs when header.php hasn't been included yet.
+// (system_settings.php includes both header.php + navbar.php, so this defers.)
+if (defined('ADMIN_SHELL_OPENED') && ADMIN_SHELL_OPENED) return;
+?>
+<link href="<?= base_url('assets/vendor/bootstrap5/css/bootstrap.min.css') ?>" rel="stylesheet">
+<link href="<?= base_url('assets/vendor/bootstrap-icons/bootstrap-icons.css') ?>" rel="stylesheet">
+<nav class="navbar navbar-expand navbar-dark px-3 mb-0" style="position:sticky;top:0;z-index:99;background:var(--bo-accent, #C2D500);">
+    <a class="navbar-brand fw-bold text-dark" href="<?= base_url('views/admin/dashboard.php') ?>">
+        <i class="bi bi-lightning-charge-fill me-2"></i><?= htmlspecialchars(defined('APP_NAME') ? APP_NAME : 'FitMe 3070') ?>
+    </a>
+    <ul class="navbar-nav ms-auto">
+        <li class="nav-item">
+            <span class="nav-link text-dark"><?= htmlspecialchars($user['name'] ?? '') ?></span>
+        </li>
+        <li class="nav-item"><a class="nav-link text-dark" href="<?= base_url('views/auth/logout.php') ?>"><i class="bi bi-box-arrow-right"></i></a></li>
+    </ul>
+</nav>