[6.x] Add set placeholder text clashes with non-text nodes

[jacksleight]

Bug description

It looks like the code that detects whether or not to display the "Type / to insert a set" text only detects text nodes, as it remains visible if only non-text node are on the line:

How to reproduce

1. Add a non-text inline node to a bard field with sets configured

You can use the v6 branch of https://github.com/jacksleight/statamic-bard-texstyle and a pin style to test.

Logs

Environment

Environment
Application Name: Statamic
Laravel Version: 12.47.0
PHP Version: 8.3.29
Composer Version: 2.9.2
Environment: local
Debug Mode: ENABLED
URL: statamic-bard-texstyle-lab.test
Maintenance Mode: OFF
Timezone: UTC
Locale: en

Cache
Config: NOT CACHED
Events: NOT CACHED
Routes: NOT CACHED
Views: CACHED

Drivers
Broadcasting: log
Cache: file
Database: sqlite
Logs: stack / single
Mail: log
Queue: sync
Session: file

Storage
public/storage: NOT LINKED

Statamic
Addons: 1
Sites: 1
Stache Watcher: Enabled (auto)
Static Caching: Disabled
Version: 6.0.0-beta.2 PRO

Statamic Addons
jacksleight/statamic-bard-texstyle: dev-main

Installation

Fresh statamic/statamic site via CLI

Additional details

No response