fix(VTreeview): hide extended lines when fluid (#21798)

fixes #21794

Author: J-Sek

packages/vuetify/src/components/VTreeview/VTreeview.tsx

@@ -28,7 +28,6 @@ function flatten (items: ListItem[], flat: ListItem[] = []) {
 }
 
 export const makeVTreeviewProps = propsFactory({
-  fluid: Boolean,
   openAll: Boolean,
   indentLines: [Boolean, String] as PropType<boolean | IndentLinesVariant>,
   search: String,

packages/vuetify/src/components/VTreeview/VTreeviewChildren.tsx

@@ -37,6 +37,7 @@ export type VTreeviewChildrenSlots<T> = {
 }
 
 export const makeVTreeviewChildrenProps = propsFactory({
+  fluid: Boolean,
   disabled: Boolean,
   loadChildren: Function as PropType<(item: unknown) => Promise<void>>,
   loadingIcon: {
@@ -132,7 +133,7 @@ export const VTreeviewChildren = genericComponent<new <T extends InternalListIte
         depth,
         isLast,
         isLastGroup: props.isLastGroup,
-        leafLinks: !props.hideActions,
+        leafLinks: !props.hideActions && !props.fluid,
         separateRoots: props.separateRoots,
         parentIndentLines: props.parentIndentLines,
         variant: props.indentLinesVariant,