style: misc UI fixes (#37691)

- Action view sidebar: rename `job-brief-item` to
`action-view-sidebar-item`, fix trash icon overflow on long artifact
names, align artifact and workflow hover styles with the jobs list
- Branches: expand new PR button cell to three wide so the button is not
clipped on narrow viewports
- Dashboard feed: add `tw-max-w-full` so long issue titles truncate
- Reactions: tighten label padding

<img width="261" height="65" alt="Screenshot 2026-05-13 at 16 18 33"
src="https://github.com/user-attachments/assets/ecfe8f37-4a65-4839-b8c0-defccc85482c"
/>
<img width="154" height="126" alt="Screenshot 2026-05-13 at 16 19 25"
src="https://github.com/user-attachments/assets/41302134-d1b7-401a-be2d-79173adb6d17"
/>
<img width="405" height="378" alt="Screenshot 2026-05-13 at 16 47 18"
src="https://github.com/user-attachments/assets/e2c5cdd4-f11d-498c-b17e-c74c80c0ddf7"
/>
<img width="206" height="149" alt="Screenshot 2026-05-13 at 16 55 53"
src="https://github.com/user-attachments/assets/7787125d-04b1-4500-b9b8-2637845509d6"
/>
<img width="858" height="135" alt="Screenshot 2026-05-13 at 16 58 41"
src="https://github.com/user-attachments/assets/cb5bdf56-3891-469d-aa77-ea38855958c1"
/>
<img width="434" height="128" alt="Screenshot 2026-05-13 at 17 00 43"
src="https://github.com/user-attachments/assets/60f2c34d-b345-4813-8f6d-a95bf51021b4"
/>



---
This PR was written with the help of Claude Opus 4.7

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/repo/issue/card.tmpl

@@ -68,7 +68,7 @@
 			{{range $label := .Labels}}
 				{{$link := print $.Issue.Repo.Link "/issues"}}
 				{{$link = QueryBuild $link "labels" $label.ID}}
-				{{ctx.RenderUtils.RenderLabelWithLink $label $link}}
+				<a class="item" href="{{$link}}">{{ctx.RenderUtils.RenderLabel $label}}</a>
 			{{end}}
 		</div>
 		{{if .Assignees}}

templates/repo/issue/view_content/comments.tmpl

@@ -169,7 +169,7 @@
 			</div>
 		{{else if eq .Type 7}}
 			{{if or .AddedLabels .RemovedLabels}}
-				<div class="timeline-item event with-labels-list-inline" id="{{.HashTag}}">
+				<div class="timeline-item event" id="{{.HashTag}}">
 					<span class="badge">{{svg "octicon-tag"}}</span>
 					{{template "shared/user/avatarlink" dict "user" .Poster}}
 					<span class="comment-text-line">