// Handle add perspective form
    if (
        $perspectives_table_exists &&
        isset($_POST['add_perspective']) &&
        !empty($_POST['perspective_name']) &&
        !empty($_POST['perspective_type'])
    ) {
        $name = sanitize_text_field($_POST['perspective_name']);
        $type = sanitize_text_field($_POST['perspective_type']);
        $states = isset($_POST['perspective_states']) ? sanitize_text_field($_POST['perspective_states']) : null;
        $is_default = !empty($_POST['perspective_default']) ? 1 : 0;
        $target_project_id = $is_default ? null : $project_id;
        // Only allow user to add non-fixed perspectives
        if ($type === 'fixed') {
            echo '<div class="error"><p>Cannot add new fixed perspectives.</p></div>';
        } else {
            $result = $wpdb->insert($perspectives_table, [
                'project_id' => $target_project_id,
                'name' => $name,
                'type' => $type,
                'states' => $states,
                'default' => $is_default,
                'created_at' => current_time('mysql'),
            ]);
            if ($result === false) {
                echo '<div class="error"><p>Failed to add perspective: ' . esc_html($wpdb->last_error) . '</p></div>';
            } else {
                echo '<div class="updated"><p>Perspective added.</p></div>';
            }
        }
    }