refactor(templates): remove ctxData from tmpl files, use ctx.RootData instead (#37567)

Sub-templates have direct access to `ctx.RootData` (the root data map),
so there is no need for callers to explicitly pass it as `ctxData` via `dict`.

Also fix #37569 by the way

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: wxiaoguang <2114189+wxiaoguang@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/admin/user/edit.tmpl

@@ -1,4 +1,4 @@
-{{template "admin/layout_head" (dict "ctxData" . "pageClass" "admin edit user")}}
+{{template "admin/layout_head" (dict "pageClass" "admin edit user")}}
 	<div class="admin-setting-content">
 		<h4 class="ui top attached header">
 			{{ctx.Locale.Tr "admin.users.edit_account"}}