0) {
$building = $sql->single(
"SELECT * FROM buildings WHERE id = ?",
"i",
[$buildingId]
);
}
$isEdit = !empty($building);
$pageTitle = $isEdit ? "Gebäude bearbeiten: " . htmlspecialchars($building['name']) : "Neues Gebäude";
$prefillLocationId = (int)($_GET['location_id'] ?? 0);
// =========================
// Standorte laden
// =========================
$locations = $sql->get("SELECT id, name FROM locations ORDER BY name", "", []);
$selectedLocationId = $building['location_id'] ?? $prefillLocationId;
?>