fix: harden hide_cursor CSS so the cursor reliably disappears

Extend the hide_cursor style block to also target html, body, the
::before/::after pseudo-elements, and the :hover state so the cursor
is hidden even when an element re-asserts a cursor via a pseudo-element
or on hover.

Fixes #784

Author: mvanhorn

internal/templates/partials/head.templ

@@ -28,7 +28,12 @@ templ Head(viewData common.ViewData) {
 	<link rel="icon" type="image/png" sizes="16x16" href="/assets/images/favicon-16x16.png"/>
 	if viewData.HideCursor {
 		<style>
-			* {
+			html,
+			body,
+			*,
+			*::before,
+			*::after,
+			*:hover {
 			    cursor: none !important;
 			}
 		</style>