Refactor frontend tw-justify-between layouts to flex-left-right (#37291)

This PR standardizes left/right two-child frontend layouts on
`flex-left-right` and removes ad-hoc `tw-justify-between` combinations.
The goal is consistent wrapping + spacing behavior under narrow widths
with less utility-class churn.

Also: remove useless "flex-center-wrap", slightly improve some templates
(no visual change, tested)

---------

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/repo/release/list.tmpl

@@ -30,7 +30,7 @@
 						{{end}}
 					</div>
 					<div class="ui segment detail">
-						<div class="tw-flex tw-items-center tw-justify-between tw-flex-wrap tw-mb-2">
+						<div class="flex-left-right tw-mb-2">
 							<h4 class="release-list-title tw-break-anywhere">
 								{{if $.PageIsSingleTag}}{{$release.Title}}{{else}}<a class="muted" href="{{$.RepoLink}}/releases/tag/{{$release.TagName | PathEscapeSegments}}">{{$release.Title}}</a>{{end}}
 								{{template "repo/commit_statuses" dict "Status" $info.CommitStatus "Statuses" $info.CommitStatuses "AdditionalClasses" "tw-flex"}}