Fix various problems (artifact order, api empty slice, assignee check, fuzzy prompt, mirror proxy, adopt git) (#33569) (#33577)

Backport #33569 by @wxiaoguang

* Make artifact list output has stable order
* Fix #33506
* Fix #33521
* Fix #33288
* Fix #33196
* Fix #33561

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/convert/pull.go

@@ -18,6 +18,7 @@ import (
 	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/log"
 	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/util"
 )
 
 // ToAPIPullRequest assumes following fields have been assigned with valid values:
@@ -77,7 +78,7 @@ func ToAPIPullRequest(ctx context.Context, pr *issues_model.PullRequest, doer *u
 		Labels:         apiIssue.Labels,
 		Milestone:      apiIssue.Milestone,
 		Assignee:       apiIssue.Assignee,
-		Assignees:      apiIssue.Assignees,
+		Assignees:      util.SliceNilAsEmpty(apiIssue.Assignees),
 		State:          apiIssue.State,
 		Draft:          pr.IsWorkInProgress(ctx),
 		IsLocked:       apiIssue.IsLocked,
@@ -94,6 +95,10 @@ func ToAPIPullRequest(ctx context.Context, pr *issues_model.PullRequest, doer *u
 		Updated:        pr.Issue.UpdatedUnix.AsTimePtr(),
 		PinOrder:       apiIssue.PinOrder,
 
+		// output "[]" rather than null to align to github outputs
+		RequestedReviewers:      []*api.User{},
+		RequestedReviewersTeams: []*api.Team{},
+
 		AllowMaintainerEdit: pr.AllowMaintainerEdit,
 
 		Base: &api.PRBranchInfo{