[GITEA] Fix issue card links on projects

- Don't expect that rendering is done on a repository, use the given
issue to figure out the repository link.
- Resolves https://codeberg.org/forgejo/forgejo/issues/1321

(cherry picked from commit 63f16652ca)
(cherry picked from commit 821785d0af)
(cherry picked from commit 345742a0dc)
(cherry picked from commit 2a37b91d7c)
(cherry picked from commit 9d40b409d7)
(cherry picked from commit c4c377e733)
(cherry picked from commit dc149daafe)

templates/repo/issue/card.tmpl

@@ -33,7 +33,7 @@
 		</div>
 		{{if .MilestoneID}}
 		<div class="meta gt-my-2">
-			<a class="milestone" href="{{$.Page.RepoLink}}/milestone/{{.MilestoneID}}">
+			<a class="milestone" href="{{.Repo.Link}}/milestone/{{.MilestoneID}}">
 				{{svg "octicon-milestone" 16 "gt-mr-2 gt-vm"}}
 				<span class="gt-vm">{{.Milestone.Name}}</span>
 			</a>
@@ -42,7 +42,7 @@
 		{{if $.Page.LinkedPRs}}
 		{{range index $.Page.LinkedPRs .ID}}
 		<div class="meta gt-my-2">
-			<a href="{{$.Page.RepoLink}}/pulls/{{.Index}}">
+			<a href="{{$.Issue.Repo.Link}}/pulls/{{.Index}}">
 				<span class="gt-m-0 text {{if .PullRequest.HasMerged}}purple{{else if .IsClosed}}red{{else}}green{{end}}">{{svg "octicon-git-merge" 16 "gt-mr-2 gt-vm"}}</span>
 				<span class="gt-vm">{{.Title}} <span class="text light grey">#{{.Index}}</span></span>
 			</a>
@@ -54,7 +54,7 @@
 	{{if or .Labels .Assignees}}
 	<div class="extra content labels-list gt-p-0 gt-pt-2">
 		{{range .Labels}}
-			<a target="_blank" href="{{$.Page.RepoLink}}/issues?labels={{.ID}}">{{RenderLabel ctx .}}</a>
+			<a target="_blank" href="{{$.Issue.Repo.Link}}/issues?labels={{.ID}}">{{RenderLabel ctx .}}</a>
 		{{end}}
 		<div class="right floated">
 			{{range .Assignees}}