Refactor locale number (#24134)

Before, the `GiteaLocaleNumber.js` was just written as a a drop-in
replacement for old `js-pretty-number`.

Actually, we can use Golang's `text` package to format.

This PR partially completes the TODOs in `GiteaLocaleNumber.js`:

> if we have complete backend locale support (eg: Golang "x/text"
package), we can drop this component.
> tooltip: only 2 usages of this, we can replace it with Golang's
"x/text/number" package in the future.

This PR also helps #24131

Screenshots:

<details>

![image](https://user-images.githubusercontent.com/2114189/232179420-b1b9974b-9d96-4408-b209-b80182c8b359.png)


![image](https://user-images.githubusercontent.com/2114189/232179416-14f36aa0-3f3e-4ac9-b366-7bd3a4464a11.png)

</details>

19 files changed, 118 insertions, 106 deletions

diff --git a/modules/charset/escape_test.go b/modules/charset/escape_test.go
index 26e82bf13a..f63c5c5c52 100644
--- a/modules/charset/escape_test.go
+++ b/modules/charset/escape_test.go
@@ -132,18 +132,10 @@ then resh (ר), and finally heh (ה) (which should appear leftmost).`,
 	},
 }
 
-type nullLocale struct{}
-
-func (nullLocale) Language() string                                                   { return "" }
-func (nullLocale) Tr(key string, _ ...interface{}) string                             { return key }
-func (nullLocale) TrN(cnt interface{}, key1, keyN string, args ...interface{}) string { return "" }
-
-var _ (translation.Locale) = nullLocale{}
-
 func TestEscapeControlString(t *testing.T) {
 	for _, tt := range escapeControlTests {
 		t.Run(tt.name, func(t *testing.T) {
-			status, result := EscapeControlString(tt.text, nullLocale{})
+			status, result := EscapeControlString(tt.text, &translation.MockLocale{})
 			if !reflect.DeepEqual(*status, tt.status) {
 				t.Errorf("EscapeControlString() status = %v, wanted= %v", status, tt.status)
 			}
@@ -179,7 +171,7 @@ func TestEscapeControlReader(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			input := strings.NewReader(tt.text)
 			output := &strings.Builder{}
-			status, err := EscapeControlReader(input, output, nullLocale{})
+			status, err := EscapeControlReader(input, output, &translation.MockLocale{})
 			result := output.String()
 			if err != nil {
 				t.Errorf("EscapeControlReader(): err = %v", err)
@@ -201,5 +193,5 @@ func TestEscapeControlReader_panic(t *testing.T) {
 	for i := 0; i < 6826; i++ {
 		bs = append(bs, []byte("—")...)
 	}
-	_, _ = EscapeControlString(string(bs), nullLocale{})
+	_, _ = EscapeControlString(string(bs), &translation.MockLocale{})
 }
diff --git a/modules/csv/csv_test.go b/modules/csv/csv_test.go
index 6b91a81fc4..f6e782a5a4 100644
--- a/modules/csv/csv_test.go
+++ b/modules/csv/csv_test.go
@@ -13,6 +13,7 @@ import (
 
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/translation"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -550,20 +551,6 @@ a|"he said, ""here I am"""`,
 	}
 }
 
-type mockLocale struct{}
-
-func (l mockLocale) Language() string {
-	return "en"
-}
-
-func (l mockLocale) Tr(s string, _ ...interface{}) string {
-	return s
-}
-
-func (l mockLocale) TrN(_cnt interface{}, key1, _keyN string, _args ...interface{}) string {
-	return key1
-}
-
 func TestFormatError(t *testing.T) {
 	cases := []struct {
 		err             error
@@ -591,7 +578,7 @@ func TestFormatError(t *testing.T) {
 	}
 
 	for n, c := range cases {
-		message, err := FormatError(c.err, mockLocale{})
+		message, err := FormatError(c.err, &translation.MockLocale{})
 		if c.expectsError {
 			assert.Error(t, err, "case %d: expected an error to be returned", n)
 		} else {
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index f93419fe87..27d6000daf 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -132,7 +132,6 @@ func NewFuncMap() []template.FuncMap {
 		// -----------------------------------------------------------------
 		// time / number / format
 		"FileSize":      base.FileSize,
-		"LocaleNumber":  LocaleNumber,
 		"CountFmt":      base.FormatNumberSI,
 		"TimeSince":     timeutil.TimeSince,
 		"TimeSinceUnix": timeutil.TimeSinceUnix,
@@ -782,12 +781,6 @@ func mirrorRemoteAddress(ctx context.Context, m *repo_model.Repository, remoteNa
 	return a
 }
 
-// LocaleNumber renders a number with a Custom Element, browser will render it with a locale number
-func LocaleNumber(v interface{}) template.HTML {
-	num, _ := util.ToInt64(v)
-	return template.HTML(fmt.Sprintf(`<gitea-locale-number data-number="%d">%d</gitea-locale-number>`, num, num))
-}
-
 // Eval the expression and return the result, see the comment of eval.Expr for details.
 // To use this helper function in templates, pass each token as a separate parameter.
 //
diff --git a/modules/test/context_tests.go b/modules/test/context_tests.go
index 94dbd2f290..e558bf1b9f 100644
--- a/modules/test/context_tests.go
+++ b/modules/test/context_tests.go
@@ -18,6 +18,7 @@ import (
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/translation"
 	"code.gitea.io/gitea/modules/web/middleware"
 
 	chi "github.com/go-chi/chi/v5"
@@ -34,7 +35,7 @@ func MockContext(t *testing.T, path string) *context.Context {
 			Values: make(url.Values),
 		},
 		Resp:   context.NewResponse(resp),
-		Locale: &mockLocale{},
+		Locale: &translation.MockLocale{},
 	}
 	defer ctx.Close()
 
@@ -91,20 +92,6 @@ func LoadGitRepo(t *testing.T, ctx *context.Context) {
 	assert.NoError(t, err)
 }
 
-type mockLocale struct{}
-
-func (l mockLocale) Language() string {
-	return "en"
-}
-
-func (l mockLocale) Tr(s string, _ ...interface{}) string {
-	return s
-}
-
-func (l mockLocale) TrN(_cnt interface{}, key1, _keyN string, _args ...interface{}) string {
-	return key1
-}
-
 type mockResponseWriter struct {
 	httptest.ResponseRecorder
 	size int
diff --git a/modules/translation/mock.go b/modules/translation/mock.go
new file mode 100644
index 0000000000..6ce66166aa
--- /dev/null
+++ b/modules/translation/mock.go
@@ -0,0 +1,27 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package translation
+
+import "fmt"
+
+// MockLocale provides a mocked locale without any translations
+type MockLocale struct{}
+
+var _ Locale = (*MockLocale)(nil)
+
+func (l MockLocale) Language() string {
+	return "en"
+}
+
+func (l MockLocale) Tr(s string, _ ...interface{}) string {
+	return s
+}
+
+func (l MockLocale) TrN(_cnt interface{}, key1, _keyN string, _args ...interface{}) string {
+	return key1
+}
+
+func (l MockLocale) PrettyNumber(v any) string {
+	return fmt.Sprint(v)
+}
diff --git a/modules/translation/translation.go b/modules/translation/translation.go
index 331da0f965..56cf1df2d4 100644
--- a/modules/translation/translation.go
+++ b/modules/translation/translation.go
@@ -15,17 +15,20 @@ import (
 	"code.gitea.io/gitea/modules/translation/i18n"
 
 	"golang.org/x/text/language"
+	"golang.org/x/text/message"
+	"golang.org/x/text/number"
 )
 
 type contextKey struct{}
 
-var ContextKey interface{} = &contextKey{}
+var ContextKey any = &contextKey{}
 
 // Locale represents an interface to translation
 type Locale interface {
 	Language() string
-	Tr(string, ...interface{}) string
-	TrN(cnt interface{}, key1, keyN string, args ...interface{}) string
+	Tr(string, ...any) string
+	TrN(cnt any, key1, keyN string, args ...any) string
+	PrettyNumber(v any) string
 }
 
 // LangType represents a lang type
@@ -135,6 +138,7 @@ func Match(tags ...language.Tag) language.Tag {
 type locale struct {
 	i18n.Locale
 	Lang, LangName string // these fields are used directly in templates: .i18n.Lang
+	msgPrinter     *message.Printer
 }
 
 // NewLocale return a locale
@@ -147,13 +151,24 @@ func NewLocale(lang string) Locale {
 	langName := "unknown"
 	if l, ok := allLangMap[lang]; ok {
 		langName = l.Name
+	} else if len(setting.Langs) > 0 {
+		lang = setting.Langs[0]
+		langName = setting.Names[0]
 	}
+
 	i18nLocale, _ := i18n.GetLocale(lang)
-	return &locale{
+	l := &locale{
 		Locale:   i18nLocale,
 		Lang:     lang,
 		LangName: langName,
 	}
+	if langTag, err := language.Parse(lang); err != nil {
+		log.Error("Failed to parse language tag from name %q: %v", l.Lang, err)
+		l.msgPrinter = message.NewPrinter(language.English)
+	} else {
+		l.msgPrinter = message.NewPrinter(langTag)
+	}
+	return l
 }
 
 func (l *locale) Language() string {
@@ -199,7 +214,7 @@ var trNLangRules = map[string]func(int64) int{
 }
 
 // TrN returns translated message for plural text translation
-func (l *locale) TrN(cnt interface{}, key1, keyN string, args ...interface{}) string {
+func (l *locale) TrN(cnt any, key1, keyN string, args ...any) string {
 	var c int64
 	if t, ok := cnt.(int); ok {
 		c = int64(t)
@@ -223,3 +238,8 @@ func (l *locale) TrN(cnt interface{}, key1, keyN string, args ...interface{}) st
 	}
 	return l.Tr(keyN, args...)
 }
+
+func (l *locale) PrettyNumber(v any) string {
+	// TODO: this mechanism is not good enough, the complete solution is to switch the translation system to ICU message format
+	return l.msgPrinter.Sprintf("%v", number.Decimal(v))
+}
diff --git a/modules/translation/translation_test.go b/modules/translation/translation_test.go
new file mode 100644
index 0000000000..83a40f1458
--- /dev/null
+++ b/modules/translation/translation_test.go
@@ -0,0 +1,27 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package translation
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/modules/translation/i18n"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPrettyNumber(t *testing.T) {
+	// TODO: make this package friendly to testing
+
+	i18n.ResetDefaultLocales()
+
+	allLangMap = make(map[string]*LangType)
+	allLangMap["id-ID"] = &LangType{Lang: "id-ID", Name: "Bahasa Indonesia"}
+
+	l := NewLocale("id-ID")
+	assert.EqualValues(t, "1.000.000", l.PrettyNumber(1000000))
+
+	l = NewLocale("nosuch")
+	assert.EqualValues(t, "1,000,000", l.PrettyNumber(1000000))
+}
diff --git a/templates/devtest/gitea-ui.tmpl b/templates/devtest/gitea-ui.tmpl
index 1ab9ae7b7c..2fe478a07d 100644
--- a/templates/devtest/gitea-ui.tmpl
+++ b/templates/devtest/gitea-ui.tmpl
@@ -15,13 +15,13 @@
 
 	<div>
 		<h1>LocaleNumber</h1>
-		<div>{{LocaleNumber 1}}</div>
-		<div>{{LocaleNumber 12}}</div>
-		<div>{{LocaleNumber 123}}</div>
-		<div>{{LocaleNumber 1234}}</div>
-		<div>{{LocaleNumber 12345}}</div>
-		<div>{{LocaleNumber 123456}}</div>
-		<div>{{LocaleNumber 1234567}}</div>
+		<div>{{.locale.PrettyNumber 1}}</div>
+		<div>{{.locale.PrettyNumber 12}}</div>
+		<div>{{.locale.PrettyNumber 123}}</div>
+		<div>{{.locale.PrettyNumber 1234}}</div>
+		<div>{{.locale.PrettyNumber 12345}}</div>
+		<div>{{.locale.PrettyNumber 123456}}</div>
+		<div>{{.locale.PrettyNumber 1234567}}</div>
 	</div>
 
 	<div>
diff --git a/templates/projects/list.tmpl b/templates/projects/list.tmpl
index 213bab70b6..ae9e3a0d11 100644
--- a/templates/projects/list.tmpl
+++ b/templates/projects/list.tmpl
@@ -13,11 +13,11 @@
 		<div class="ui compact tiny menu">
 			<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{$.Link}}?state=open">
 				{{svg "octicon-project-symlink" 16 "gt-mr-3"}}
-				{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+				{{.locale.PrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 			</a>
 			<a class="item{{if .IsShowClosed}} active{{end}}" href="{{$.Link}}?state=closed">
 				{{svg "octicon-check" 16 "gt-mr-3"}}
-				{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+				{{.locale.PrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 			</a>
 		</div>
 
@@ -46,9 +46,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{$.locale.PrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{$.locale.PrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 						</span>
 					</div>
 					{{if and $.CanWriteProjects (not $.Repository.IsArchived)}}
diff --git a/templates/repo/issue/milestones.tmpl b/templates/repo/issue/milestones.tmpl
index 602461400b..e54a72714a 100644
--- a/templates/repo/issue/milestones.tmpl
+++ b/templates/repo/issue/milestones.tmpl
@@ -18,11 +18,11 @@
 				<div class="ui compact tiny menu">
 					<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/milestones?state=open&q={{$.Keyword}}">
 						{{svg "octicon-milestone" 16 "gt-mr-3"}}
-						{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+						{{.locale.PrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 					</a>
 					<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/milestones?state=closed&q={{$.Keyword}}">
 						{{svg "octicon-check" 16 "gt-mr-3"}}
-						{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+						{{.locale.PrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 					</a>
 				</div>
 			</div>
@@ -84,9 +84,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{$.locale.PrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{$.locale.PrettyNumber .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" (TimeSinceUnix .UpdatedUnix $.locale) | Safe}}{{end}}
 						</span>
diff --git a/templates/repo/issue/openclose.tmpl b/templates/repo/issue/openclose.tmpl
index 6eb26b36c5..045f513974 100644
--- a/templates/repo/issue/openclose.tmpl
+++ b/templates/repo/issue/openclose.tmpl
@@ -5,10 +5,10 @@
 		{{else}}
 			{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
 		{{end}}
-		{{LocaleNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+		{{.locale.PrettyNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 	</a>
 	<a class="{{if .IsShowClosed}}active {{end}}item" href="{{$.Link}}?q={{$.Keyword}}&type={{.ViewType}}&sort={{$.SortType}}&state=closed&labels={{.SelectLabels}}&milestone={{.MilestoneID}}&project={{.ProjectID}}&assignee={{.AssigneeID}}&poster={{.PosterID}}">
 		{{svg "octicon-check" 16 "gt-mr-3"}}
-		{{LocaleNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+		{{.locale.PrettyNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 	</a>
 </div>
diff --git a/templates/repo/projects/list.tmpl b/templates/repo/projects/list.tmpl
index fb5bc4f48d..bbcc20dd7c 100644
--- a/templates/repo/projects/list.tmpl
+++ b/templates/repo/projects/list.tmpl
@@ -15,11 +15,11 @@
 		<div class="ui compact tiny menu">
 			<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/projects?state=open">
 				{{svg "octicon-project" 16 "gt-mr-3"}}
-				{{LocaleNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+				{{.locale.PrettyNumber .OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 			</a>
 			<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.RepoLink}}/projects?state=closed">
 				{{svg "octicon-check" 16 "gt-mr-3"}}
-				{{LocaleNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+				{{.locale.PrettyNumber .ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 			</a>
 		</div>
 
@@ -48,9 +48,9 @@
 						{{end}}
 						<span class="issue-stats">
 							{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+							{{.locale.PrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 							{{svg "octicon-check" 16 "gt-mr-3"}}
-							{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+							{{.locale.PrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 						</span>
 					</div>
 					{{if and $.CanWriteProjects (not $.Repository.IsArchived)}}
diff --git a/templates/repo/release/list.tmpl b/templates/repo/release/list.tmpl
index 12aaa0bd71..8e1793a5ba 100644
--- a/templates/repo/release/list.tmpl
+++ b/templates/repo/release/list.tmpl
@@ -161,9 +161,9 @@
 											<li>
 												<span class="ui text middle aligned right">
 													<span class="ui text grey">{{.Size | FileSize}}</span>
-													<gitea-locale-number data-number-in-tooltip="{{dict "message" ($.locale.Tr "repo.release.download_count") "number" .DownloadCount | Json}}">
+													<span data-tooltip-content="{{$.locale.Tr "repo.release.download_count" ($.locale.PrettyNumber .DownloadCount)}}">
 														{{svg "octicon-info"}}
-													</gitea-locale-number>
+													</span>
 												</span>
 												<a target="_blank" rel="noopener noreferrer" href="{{.DownloadURL}}">
 													<strong>{{svg "octicon-package" 16 "gt-mr-2"}}{{.Name}}</strong>
diff --git a/templates/repo/release/new.tmpl b/templates/repo/release/new.tmpl
index 7a4e28cffa..ddedfd6086 100644
--- a/templates/repo/release/new.tmpl
+++ b/templates/repo/release/new.tmpl
@@ -71,9 +71,9 @@
 							<input name="attachment-edit-{{.UUID}}" class="gt-mr-3 attachment_edit" required value="{{.Name}}">
 							<input name="attachment-del-{{.UUID}}" type="hidden" value="false">
 							<span class="ui text grey gt-mr-3">{{.Size | FileSize}}</span>
-							<gitea-locale-number data-number-in-tooltip="{{dict "message" ($.locale.Tr "repo.release.download_count") "number" .DownloadCount | Json}}">
+							<span data-tooltip-content="{{$.locale.Tr "repo.release.download_count" ($.locale.PrettyNumber .DownloadCount)}}">
 								{{svg "octicon-info"}}
-							</gitea-locale-number>
+							</span>
 						</div>
 					</div>
 				{{end}}
diff --git a/templates/repo/sub_menu.tmpl b/templates/repo/sub_menu.tmpl
index 97fbabda41..9289295b1d 100644
--- a/templates/repo/sub_menu.tmpl
+++ b/templates/repo/sub_menu.tmpl
@@ -4,7 +4,7 @@
 		<div class="ui two horizontal center list">
 			{{if and (.Permission.CanRead $.UnitTypeCode) (not .IsEmptyRepo)}}
 				<div class="item{{if .PageIsCommits}} active{{end}}">
-					<a href="{{.RepoLink}}/commits/{{.BranchNameSubURL}}">{{svg "octicon-history"}} <b>{{LocaleNumber .CommitsCount}}</b> {{.locale.TrN .CommitsCount "repo.commit" "repo.commits"}}</a>
+					<a href="{{.RepoLink}}/commits/{{.BranchNameSubURL}}">{{svg "octicon-history"}} <b>{{.locale.PrettyNumber .CommitsCount}}</b> {{.locale.TrN .CommitsCount "repo.commit" "repo.commits"}}</a>
 				</div>
 				<div class="item{{if .PageIsBranches}} active{{end}}">
 					<a href="{{.RepoLink}}/branches">{{svg "octicon-git-branch"}} <b>{{.BranchesCount}}</b> {{.locale.TrN .BranchesCount "repo.branch" "repo.branches"}}</a>
diff --git a/templates/user/dashboard/issues.tmpl b/templates/user/dashboard/issues.tmpl
index 6b9bfe4eba..5a207aac60 100644
--- a/templates/user/dashboard/issues.tmpl
+++ b/templates/user/dashboard/issues.tmpl
@@ -65,11 +65,11 @@
 						<div class="ui compact tiny menu">
 							<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.Link}}?type={{$.ViewType}}&repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=open&q={{$.Keyword}}">
 								{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-								{{LocaleNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+								{{.locale.PrettyNumber .IssueStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 							</a>
 							<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.Link}}?type={{$.ViewType}}&repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=closed&q={{$.Keyword}}">
 								{{svg "octicon-issue-closed" 16 "gt-mr-3"}}
-								{{LocaleNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+								{{.locale.PrettyNumber .IssueStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 							</a>
 						</div>
 					</div>
diff --git a/templates/user/dashboard/milestones.tmpl b/templates/user/dashboard/milestones.tmpl
index 9915159721..39eea2fc75 100644
--- a/templates/user/dashboard/milestones.tmpl
+++ b/templates/user/dashboard/milestones.tmpl
@@ -39,11 +39,11 @@
 						<div class="ui compact tiny menu">
 							<a class="item{{if not .IsShowClosed}} active{{end}}" href="{{.Link}}?repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=open&q={{$.Keyword}}">
 								{{svg "octicon-milestone" 16 "gt-mr-3"}}
-								{{LocaleNumber .MilestoneStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
+								{{.locale.PrettyNumber .MilestoneStats.OpenCount}}&nbsp;{{.locale.Tr "repo.issues.open_title"}}
 							</a>
 							<a class="item{{if .IsShowClosed}} active{{end}}" href="{{.Link}}?repos=[{{range $.RepoIDs}}{{.}}%2C{{end}}]&sort={{$.SortType}}&state=closed&q={{$.Keyword}}">
 								{{svg "octicon-check" 16 "gt-mr-3"}}
-								{{LocaleNumber .MilestoneStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
+								{{.locale.PrettyNumber .MilestoneStats.ClosedCount}}&nbsp;{{.locale.Tr "repo.issues.closed_title"}}
 							</a>
 						</div>
 					</div>
@@ -104,9 +104,9 @@
 								{{end}}
 								<span class="issue-stats">
 									{{svg "octicon-issue-opened" 16 "gt-mr-3"}}
-									{{LocaleNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
+									{{.locale.PrettyNumber .NumOpenIssues}}&nbsp;{{$.locale.Tr "repo.issues.open_title"}}
 									{{svg "octicon-check" 16 "gt-mr-3"}}
-									{{LocaleNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
+									{{.locale.PrettyNumber .NumClosedIssues}}&nbsp;{{$.locale.Tr "repo.issues.closed_title"}}
 									{{if .TotalTrackedTime}}
 										{{svg "octicon-clock"}} {{.TotalTrackedTime|Sec2Time}}
 									{{end}}
diff --git a/web_src/js/webcomponents/GiteaLocaleNumber.js b/web_src/js/webcomponents/GiteaLocaleNumber.js
deleted file mode 100644
index 613aa67359..0000000000
--- a/web_src/js/webcomponents/GiteaLocaleNumber.js
+++ /dev/null
@@ -1,20 +0,0 @@
-// Convert a number to a locale string by data-number attribute.
-// Or add a tooltip by data-number-in-tooltip attribute. JSON: {message: "count: %s", number: 123}
-window.customElements.define('gitea-locale-number', class extends HTMLElement {
-  connectedCallback() {
-    // ideally, the number locale formatting and plural processing should be done by backend with translation strings.
-    // if we have complete backend locale support (eg: Golang "x/text" package), we can drop this component.
-    const number = this.getAttribute('data-number');
-    if (number) {
-      this.attachShadow({mode: 'open'});
-      this.shadowRoot.textContent = new Intl.NumberFormat().format(Number(number));
-    }
-    const numberInTooltip = this.getAttribute('data-number-in-tooltip');
-    if (numberInTooltip) {
-      // TODO: only 2 usages of this, we can replace it with Golang's "x/text/number" package in the future
-      const {message, number} = JSON.parse(numberInTooltip);
-      const tooltipContent = message.replace(/%[ds]/, new Intl.NumberFormat().format(Number(number)));
-      this.setAttribute('data-tooltip-content', tooltipContent);
-    }
-  }
-});
diff --git a/web_src/js/webcomponents/webcomponents.js b/web_src/js/webcomponents/webcomponents.js
index 7e8135aa00..123607282b 100644
--- a/web_src/js/webcomponents/webcomponents.js
+++ b/web_src/js/webcomponents/webcomponents.js
@@ -1,4 +1,3 @@
 import '@webcomponents/custom-elements'; // polyfill for some browsers like Pale Moon
 import '@github/relative-time-element';
-import './GiteaLocaleNumber.js';
 import './GiteaOriginUrl.js';