[Bug Report][3.11.8] VTreeview does not show indent lines when using `prepend-gap`

Environment

Vuetify Version: 3.11.8 Vue Version: 3.5.27 OS: Linux undefined (current)

Steps to reproduce

1. <v-treeview :prepend-gap="16" ... />
2. or set it in global defaults
3. or set it on VList global defaults
4. or use MD3 blueprint

Expected Behavior

Intent lines should show up normally while prepend gap should also be adjusted to the given size

Actual Behavior

Indent lines line up to the left boundary

Reproduction Link

https://play.vuetifyjs.com/#...