Localize milestone related time strings (#24051)

- With #23988 in place, we can improve these timestamps

---------

Co-authored-by: silverwind <me@silverwind.io>

models/issues/milestone.go

@@ -7,7 +7,6 @@ import (
 	"context"
 	"fmt"
 	"strings"
-	"time"
 
 	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -65,7 +64,6 @@ type Milestone struct {
 	DeadlineString string `xorm:"-"`
 
 	TotalTrackedTime int64 `xorm:"-"`
-	TimeSinceUpdate  int64 `xorm:"-"`
 }
 
 func init() {
@@ -84,9 +82,6 @@ func (m *Milestone) BeforeUpdate() {
 // AfterLoad is invoked from XORM after setting the value of a field of
 // this object.
 func (m *Milestone) AfterLoad() {
-	if !m.UpdatedUnix.IsZero() {
-		m.TimeSinceUpdate = time.Now().Unix() - m.UpdatedUnix.AsTime().Unix()
-	}
 	m.NumOpenIssues = m.NumIssues - m.NumClosedIssues
 	if m.DeadlineUnix.Year() == 9999 {
 		return

options/locale/locale_en-US.ini

@@ -1710,7 +1710,7 @@ pulls.delete.text = Do you really want to delete this pull request? (This will p
 
 milestones.new = New Milestone
 milestones.closed = Closed %s
-milestones.update_ago = Updated %s ago
+milestones.updated = Updated
 milestones.no_due_date = No due date
 milestones.open = Open
 milestones.close = Close

templates/repo/issue/milestone_issues.tmpl

@@ -35,7 +35,7 @@
 				{{else}}
 					{{svg "octicon-calendar"}}
 					{{if .Milestone.DeadlineString}}
-						<span {{if .IsOverdue}}class="overdue"{{end}}>{{.Milestone.DeadlineString}}</span>
+						<span {{if .IsOverdue}}class="overdue"{{end}}>{{template "shared/datetime/short" (dict "Datetime" .Milestone.DeadlineString "Fallback" .Milestone.DeadlineString)}}</span>
 					{{else}}
 						{{$.locale.Tr "repo.milestones.no_due_date"}}
 					{{end}}

templates/repo/issue/milestones.tmpl

@@ -77,7 +77,7 @@
 						{{else}}
 							{{svg "octicon-calendar"}}
 							{{if .DeadlineString}}
-								<span {{if .IsOverdue}}class="overdue"{{end}}>{{.DeadlineString}}</span>
+								<span {{if .IsOverdue}}class="overdue"{{end}}>{{template "shared/datetime/short" (dict "Datetime" .DeadlineString "Fallback" .DeadlineString)}}</span>
 							{{else}}
 								{{$.locale.Tr "repo.milestones.no_due_date"}}
 							{{end}}
@@ -88,7 +88,7 @@
 							{{svg "octicon-check" 16 "gt-mr-3"}}
 							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 							{{if .TotalTrackedTime}}{{svg "octicon-clock"}} {{.TotalTrackedTime|Sec2Time}}{{end}}
-							{{if .UpdatedUnix}}{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.update_ago" (.TimeSinceUpdate|Sec2Time)}}{{end}}
+							{{if .UpdatedUnix}}{{svg "octicon-clock"}} {{$.locale.Tr "repo.milestones.updated"}} {{TimeSinceUnix .UpdatedUnix $.locale}}{{end}}
 						</span>
 					</div>
 					{{if and (or $.CanWriteIssues $.CanWritePulls) (not $.Repository.IsArchived)}}

templates/user/dashboard/milestones.tmpl

@@ -97,7 +97,7 @@
 								{{else}}
 									{{svg "octicon-calendar"}}
 									{{if .DeadlineString}}
-										<span {{if .IsOverdue}}class="overdue"{{end}}>{{.DeadlineString}}</span>
+										<span {{if .IsOverdue}}class="overdue"{{end}}>{{template "shared/datetime/short" (dict "Datetime" .DeadlineString "Fallback" .DeadlineString)}}</span>
 									{{else}}
 										{{$.locale.Tr "repo.milestones.no_due_date"}}
 									{{end}}