Steps to reproduce:
1. Create new Unity project using Universal 3D Template
2. Navigate to Packages > com.unity.render-pipelines.universal > Editor > SceneTemplates > Indoors
3. Open Window > Rendering > Lighting
4. In the Lighting window, click "New" button to create a new Lighting Settings asset

Actual results: Unity attempts to create New Lighting Settings.lighting inside the immutable package path. No .meta file can be written. The following error is logged and the asset is ignored:

Asset Packages/com.unity.render pipelines.universal/Editor/SceneTemplates/Indoors/New Lighting Settings.lighting has no meta file, but it's in an immutable folder. The asset will be ignored.                     UnityEditor.GUIView:ProcessEvent (UnityEngine.EntityId,intptr,bool&)

Expected results: The operation is blocked or redirected — either the button is disabled (matching context menu behavior), or a save dialog opens defaulting to the Assets/ folder

Reproducible with versions: 6000.0.78f1, 6000.3.20f1, 6000.5.4f1, 6000.6.0b4, 6000.7.0a2

Tested on (OS): macOS Tahor 26.5.1 (M1)

Notes:

in 6000.0 version navigate to Packages > com.unity.render-pipelines.universal > Editor > SceneTemplates > Standard