[web] Suppress skip-to-content link on pages without a navbar (#35670)

* Suppress skip-to-content link on pages without a navbar

* Add main content as target area for the skip link on the library page

GitOrigin-RevId: a47d7bbc283b648e47db93648d8fcae6ae12ea5a

services/web/app/views/layout-base.pug

@@ -115,7 +115,7 @@ html(
 				defer=deferScripts
 			)
 
-		if typeof suppressSkipToContent == 'undefined'
+		if suppressSkipToContent === false || (typeof suppressSkipToContent == 'undefined' && typeof suppressNavbar == 'undefined')
 			a(class='skip-to-content' href='#main-content') #{translate('skip_to_content')}
 
 		block body

services/web/app/views/project/list-react.pug

@@ -6,6 +6,7 @@ block entrypointVar
 block vars
 	- const suppressNavContentLinks = true
 	- const suppressNavbar = true
+	- const suppressSkipToContent = false
 	- const suppressFooter = true
 	- const suppressPugCookieBanner = true
 	- isWebsiteRedesign = true