feat(sidebar): fleet sidebar standard (header row, user in sidebar, collapsible groups, mini mode, no-flash transitions)

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

views/staff/dashboard.php

@@ -0,0 +1,20 @@
+<?php
+// Painel da equipa (role staff). O staff ainda não tem páginas de gestão:
+// tudo em views/admin/ exige admin. Fica a saudação e o acesso ao perfil.
+require __DIR__ . '/../../config/db.php';
+require __DIR__ . '/../../config/functions.php';
+$user = require_staff();
+
+$page_title = 'Painel';
+include __DIR__ . '/../../includes/header.php';
+?>
+<div class="container">
+    <h1 class="h3 mb-4">Olá, <?= htmlspecialchars($user['name']) ?></h1>
+
+    <div class="card shadow-sm"><div class="card-body">
+        <p class="mb-3">Bem-vindo à área da equipa FitMe 3070.</p>
+        <a class="btn btn-outline-primary" href="<?= base_url('views/user/profile.php') ?>"><i class="bi bi-person me-1"></i>O meu perfil</a>
+        <p class="text-muted small mt-3 mb-0">As ferramentas da equipa serão disponibilizadas num passo seguinte.</p>
+    </div></div>
+</div>
+<?php include __DIR__ . '/../../includes/footer.php'; ?>

views/sysadmin/system_settings.php

@@ -128,7 +128,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 }
 
 include __DIR__ . '/../../includes/header.php';
-include __DIR__ . '/../../includes/navbar.php';
 ?>
 <div class="container py-4" style="max-width:900px;">
     <div class="d-flex justify-content-between align-items-center flex-wrap gap-2 mb-3">