- add ContentSearch WebPart to pagelayout
- must be unremovable
- toolpane must be aviable to edit Query and Display Template
- PageLayout, JS and CSS solution
The only way to have a WebPart being editable via the UI is to put it in a WebPart Zone. That makes it removable. Only and everything but secure solution is hiding or removing the delete option clientside. -Users who can use the browser devtools would be able to bypass this.
Someone here with a better idea ?