Show outdated comments in files changed tab (#24936)

If enabled show a clickable label in the comment. A click on the label
opens the Conversation tab with the comment focussed - there you're able
to view the old diff (or original diff the comment was created on).

**Screenshots**


![image](https://github.com/go-gitea/gitea/assets/1135157/63ab9571-a9ee-4900-9f02-94ab0095f9e7)

![image](https://github.com/go-gitea/gitea/assets/1135157/78f7c225-8d76-46f5-acfd-9b8aab988a6c)



When resolved and outdated:

![image](https://github.com/go-gitea/gitea/assets/1135157/6ece9ebd-c792-4aa5-9c35-628694e9d093)

Option to enable/disable this (stored in user settings - default is
disabled):

![image](https://github.com/go-gitea/gitea/assets/1135157/ed99dfe4-76dc-4c12-bd96-e7e62da50ab5)

![image](https://github.com/go-gitea/gitea/assets/1135157/e837a052-e92e-4a28-906d-9db5bacf93a6)



fixes #24913

---------

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

18 files changed, 115 insertions, 38 deletions

diff --git a/models/issues/comment_code.go b/models/issues/comment_code.go
index 304ac4569f..d447d7542c 100644
--- a/models/issues/comment_code.go
+++ b/models/issues/comment_code.go
@@ -18,11 +18,11 @@ import (
 type CodeComments map[string]map[int64][]*Comment
 
 // FetchCodeComments will return a 2d-map: ["Path"]["Line"] = Comments at line
-func FetchCodeComments(ctx context.Context, issue *Issue, currentUser *user_model.User) (CodeComments, error) {
-	return fetchCodeCommentsByReview(ctx, issue, currentUser, nil)
+func FetchCodeComments(ctx context.Context, issue *Issue, currentUser *user_model.User, showOutdatedComments bool) (CodeComments, error) {
+	return fetchCodeCommentsByReview(ctx, issue, currentUser, nil, showOutdatedComments)
 }
 
-func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *user_model.User, review *Review) (CodeComments, error) {
+func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *user_model.User, review *Review, showOutdatedComments bool) (CodeComments, error) {
 	pathToLineToComment := make(CodeComments)
 	if review == nil {
 		review = &Review{ID: 0}
@@ -33,7 +33,7 @@ func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *u
 		ReviewID: review.ID,
 	}
 
-	comments, err := findCodeComments(ctx, opts, issue, currentUser, review)
+	comments, err := findCodeComments(ctx, opts, issue, currentUser, review, showOutdatedComments)
 	if err != nil {
 		return nil, err
 	}
@@ -47,15 +47,17 @@ func fetchCodeCommentsByReview(ctx context.Context, issue *Issue, currentUser *u
 	return pathToLineToComment, nil
 }
 
-func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issue, currentUser *user_model.User, review *Review) ([]*Comment, error) {
+func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issue, currentUser *user_model.User, review *Review, showOutdatedComments bool) ([]*Comment, error) {
 	var comments CommentList
 	if review == nil {
 		review = &Review{ID: 0}
 	}
 	conds := opts.ToConds()
-	if review.ID == 0 {
+
+	if !showOutdatedComments && review.ID == 0 {
 		conds = conds.And(builder.Eq{"invalidated": false})
 	}
+
 	e := db.GetEngine(ctx)
 	if err := e.Where(conds).
 		Asc("comment.created_unix").
@@ -118,12 +120,12 @@ func findCodeComments(ctx context.Context, opts FindCommentsOptions, issue *Issu
 }
 
 // FetchCodeCommentsByLine fetches the code comments for a given treePath and line number
-func FetchCodeCommentsByLine(ctx context.Context, issue *Issue, currentUser *user_model.User, treePath string, line int64) ([]*Comment, error) {
+func FetchCodeCommentsByLine(ctx context.Context, issue *Issue, currentUser *user_model.User, treePath string, line int64, showOutdatedComments bool) ([]*Comment, error) {
 	opts := FindCommentsOptions{
 		Type:     CommentTypeCode,
 		IssueID:  issue.ID,
 		TreePath: treePath,
 		Line:     line,
 	}
-	return findCodeComments(ctx, opts, issue, currentUser, nil)
+	return findCodeComments(ctx, opts, issue, currentUser, nil, showOutdatedComments)
 }
diff --git a/models/issues/comment_test.go b/models/issues/comment_test.go
index 43bad1660f..d766625be3 100644
--- a/models/issues/comment_test.go
+++ b/models/issues/comment_test.go
@@ -50,7 +50,7 @@ func TestFetchCodeComments(t *testing.T) {
 
 	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 2})
 	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
-	res, err := issues_model.FetchCodeComments(db.DefaultContext, issue, user)
+	res, err := issues_model.FetchCodeComments(db.DefaultContext, issue, user, false)
 	assert.NoError(t, err)
 	assert.Contains(t, res, "README.md")
 	assert.Contains(t, res["README.md"], int64(4))
@@ -58,7 +58,7 @@ func TestFetchCodeComments(t *testing.T) {
 	assert.Equal(t, int64(4), res["README.md"][4][0].ID)
 
 	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
-	res, err = issues_model.FetchCodeComments(db.DefaultContext, issue, user2)
+	res, err = issues_model.FetchCodeComments(db.DefaultContext, issue, user2, false)
 	assert.NoError(t, err)
 	assert.Len(t, res, 1)
 }
diff --git a/models/issues/review.go b/models/issues/review.go
index 3a1ab7468a..3685c65ce5 100644
--- a/models/issues/review.go
+++ b/models/issues/review.go
@@ -141,7 +141,7 @@ func (r *Review) LoadCodeComments(ctx context.Context) (err error) {
 	if err = r.loadIssue(ctx); err != nil {
 		return
 	}
-	r.CodeComments, err = fetchCodeCommentsByReview(ctx, r.Issue, nil, r)
+	r.CodeComments, err = fetchCodeCommentsByReview(ctx, r.Issue, nil, r, false)
 	return err
 }
 
diff --git a/models/user/setting_keys.go b/models/user/setting_keys.go
index 10255735b3..72b3974eee 100644
--- a/models/user/setting_keys.go
+++ b/models/user/setting_keys.go
@@ -8,6 +8,8 @@ const (
 	SettingsKeyHiddenCommentTypes = "issue.hidden_comment_types"
 	// SettingsKeyDiffWhitespaceBehavior is the setting key for whitespace behavior of diff
 	SettingsKeyDiffWhitespaceBehavior = "diff.whitespace_behaviour"
+	// SettingsKeyShowOutdatedComments is the setting key wether or not to show outdated comments in PRs
+	SettingsKeyShowOutdatedComments = "comment_code.show_outdated"
 	// UserActivityPubPrivPem is user's private key
 	UserActivityPubPrivPem = "activitypub.priv_pem"
 	// UserActivityPubPubPem is user's public key
diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index a2c67fbf55..70802fc4ca 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -1611,6 +1611,9 @@ issues.review.pending.tooltip = This comment is not currently visible to other u
 issues.review.review = Review
 issues.review.reviewers = Reviewers
 issues.review.outdated = Outdated
+issues.review.outdated_description = Content has changed since this comment was made
+issues.review.option.show_outdated_comments = Show outdated comments
+issues.review.option.hide_outdated_comments = Hide outdated comments
 issues.review.show_outdated = Show outdated
 issues.review.hide_outdated = Hide outdated
 issues.review.show_resolved = Show resolved
diff --git a/routers/web/repo/middlewares.go b/routers/web/repo/middlewares.go
index 5c38b31154..216550ca99 100644
--- a/routers/web/repo/middlewares.go
+++ b/routers/web/repo/middlewares.go
@@ -5,6 +5,7 @@ package repo
 
 import (
 	"fmt"
+	"strconv"
 
 	system_model "code.gitea.io/gitea/models/system"
 	user_model "code.gitea.io/gitea/models/user"
@@ -88,3 +89,27 @@ func SetWhitespaceBehavior(ctx *context.Context) {
 		ctx.Data["WhitespaceBehavior"] = whitespaceBehavior
 	}
 }
+
+// SetShowOutdatedComments set the show outdated comments option as context variable
+func SetShowOutdatedComments(ctx *context.Context) {
+	showOutdatedCommentsValue := ctx.FormString("show-outdated")
+	// var showOutdatedCommentsValue string
+
+	if showOutdatedCommentsValue != "true" && showOutdatedCommentsValue != "false" {
+		// invalid or no value for this form string -> use default or stored user setting
+		if ctx.IsSigned {
+			showOutdatedCommentsValue, _ = user_model.GetUserSetting(ctx.Doer.ID, user_model.SettingsKeyShowOutdatedComments, "false")
+		} else {
+			// not logged in user -> use the default value
+			showOutdatedCommentsValue = "false"
+		}
+	} else {
+		// valid value -> update user setting if user is logged in
+		if ctx.IsSigned {
+			_ = user_model.SetUserSetting(ctx.Doer.ID, user_model.SettingsKeyShowOutdatedComments, showOutdatedCommentsValue)
+		}
+	}
+
+	showOutdatedComments, _ := strconv.ParseBool(showOutdatedCommentsValue)
+	ctx.Data["ShowOutdatedComments"] = showOutdatedComments
+}
diff --git a/routers/web/repo/pull.go b/routers/web/repo/pull.go
index ef9d5856da..f2a58a35a7 100644
--- a/routers/web/repo/pull.go
+++ b/routers/web/repo/pull.go
@@ -761,7 +761,7 @@ func ViewPullFiles(ctx *context.Context) {
 		"numberOfViewedFiles": diff.NumViewedFiles,
 	}
 
-	if err = diff.LoadComments(ctx, issue, ctx.Doer); err != nil {
+	if err = diff.LoadComments(ctx, issue, ctx.Doer, ctx.Data["ShowOutdatedComments"].(bool)); err != nil {
 		ctx.ServerError("LoadComments", err)
 		return
 	}
diff --git a/routers/web/repo/pull_review.go b/routers/web/repo/pull_review.go
index 69d36ff4a4..5aa5811367 100644
--- a/routers/web/repo/pull_review.go
+++ b/routers/web/repo/pull_review.go
@@ -159,7 +159,7 @@ func UpdateResolveConversation(ctx *context.Context) {
 }
 
 func renderConversation(ctx *context.Context, comment *issues_model.Comment) {
-	comments, err := issues_model.FetchCodeCommentsByLine(ctx, comment.Issue, ctx.Doer, comment.TreePath, comment.Line)
+	comments, err := issues_model.FetchCodeCommentsByLine(ctx, comment.Issue, ctx.Doer, comment.TreePath, comment.Line, ctx.Data["ShowOutdatedComments"].(bool))
 	if err != nil {
 		ctx.ServerError("FetchCodeCommentsByLine", err)
 		return
diff --git a/routers/web/web.go b/routers/web/web.go
index a7573b38f5..26ad2d54c3 100644
--- a/routers/web/web.go
+++ b/routers/web/web.go
@@ -1037,7 +1037,7 @@ func registerRoutes(m *web.Route) {
 			m.Post("/dismiss_review", reqRepoAdmin, web.Bind(forms.DismissReviewForm{}), repo.DismissReview)
 			m.Post("/status", reqRepoIssuesOrPullsWriter, repo.UpdateIssueStatus)
 			m.Post("/delete", reqRepoAdmin, repo.BatchDeleteIssues)
-			m.Post("/resolve_conversation", reqRepoIssuesOrPullsReader, repo.UpdateResolveConversation)
+			m.Post("/resolve_conversation", reqRepoIssuesOrPullsReader, repo.SetShowOutdatedComments, repo.UpdateResolveConversation)
 			m.Post("/attachments", repo.UploadIssueAttachment)
 			m.Post("/attachments/remove", repo.DeleteAttachment)
 			m.Delete("/unpin/{index}", reqRepoAdmin, repo.IssueUnpin)
@@ -1285,10 +1285,10 @@ func registerRoutes(m *web.Route) {
 			m.Post("/set_allow_maintainer_edit", web.Bind(forms.UpdateAllowEditsForm{}), repo.SetAllowEdits)
 			m.Post("/cleanup", context.RepoMustNotBeArchived(), context.RepoRef(), repo.CleanUpPullRequest)
 			m.Group("/files", func() {
-				m.Get("", context.RepoRef(), repo.SetEditorconfigIfExists, repo.SetDiffViewStyle, repo.SetWhitespaceBehavior, repo.ViewPullFiles)
+				m.Get("", context.RepoRef(), repo.SetEditorconfigIfExists, repo.SetDiffViewStyle, repo.SetWhitespaceBehavior, repo.SetShowOutdatedComments, repo.ViewPullFiles)
 				m.Group("/reviews", func() {
 					m.Get("/new_comment", repo.RenderNewCodeCommentForm)
-					m.Post("/comments", web.Bind(forms.CodeCommentForm{}), repo.CreateCodeComment)
+					m.Post("/comments", web.Bind(forms.CodeCommentForm{}), repo.SetShowOutdatedComments, repo.CreateCodeComment)
 					m.Post("/submit", web.Bind(forms.SubmitReviewForm{}), repo.SubmitReview)
 				}, context.RepoMustNotBeArchived())
 			})
diff --git a/services/gitdiff/gitdiff.go b/services/gitdiff/gitdiff.go
index b6a75f6098..9adf3b9400 100644
--- a/services/gitdiff/gitdiff.go
+++ b/services/gitdiff/gitdiff.go
@@ -450,8 +450,8 @@ type Diff struct {
 }
 
 // LoadComments loads comments into each line
-func (diff *Diff) LoadComments(ctx context.Context, issue *issues_model.Issue, currentUser *user_model.User) error {
-	allComments, err := issues_model.FetchCodeComments(ctx, issue, currentUser)
+func (diff *Diff) LoadComments(ctx context.Context, issue *issues_model.Issue, currentUser *user_model.User, showOutdatedComments bool) error {
+	allComments, err := issues_model.FetchCodeComments(ctx, issue, currentUser, showOutdatedComments)
 	if err != nil {
 		return err
 	}
diff --git a/services/gitdiff/gitdiff_test.go b/services/gitdiff/gitdiff_test.go
index 389f787dfc..e270e46fd4 100644
--- a/services/gitdiff/gitdiff_test.go
+++ b/services/gitdiff/gitdiff_test.go
@@ -594,16 +594,26 @@ func setupDefaultDiff() *Diff {
 	}
 }
 
-func TestDiff_LoadComments(t *testing.T) {
+func TestDiff_LoadCommentsNoOutdated(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
 
 	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 2})
 	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
 	diff := setupDefaultDiff()
-	assert.NoError(t, diff.LoadComments(db.DefaultContext, issue, user))
+	assert.NoError(t, diff.LoadComments(db.DefaultContext, issue, user, false))
 	assert.Len(t, diff.Files[0].Sections[0].Lines[0].Comments, 2)
 }
 
+func TestDiff_LoadCommentsWithOutdated(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	issue := unittest.AssertExistsAndLoadBean(t, &issues_model.Issue{ID: 2})
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1})
+	diff := setupDefaultDiff()
+	assert.NoError(t, diff.LoadComments(db.DefaultContext, issue, user, true))
+	assert.Len(t, diff.Files[0].Sections[0].Lines[0].Comments, 3)
+}
+
 func TestDiffLine_CanComment(t *testing.T) {
 	assert.False(t, (&DiffLine{Type: DiffLineSection}).CanComment())
 	assert.False(t, (&DiffLine{Type: DiffLineAdd, Comments: []*issues_model.Comment{{Content: "bla"}}}).CanComment())
diff --git a/templates/repo/diff/comments.tmpl b/templates/repo/diff/comments.tmpl
index 5b0b32cc97..d19ac1f047 100644
--- a/templates/repo/diff/comments.tmpl
+++ b/templates/repo/diff/comments.tmpl
@@ -31,6 +31,12 @@
 				{{end}}
 			</div>
 			<div class="comment-header-right actions gt-df gt-ac">
+				{{if .Invalidated}}
+					{{$referenceUrl := printf "%s#%s" $.root.Issue.Link .HashTag}}
+					<a href="{{AppSubUrl}}{{$referenceUrl}}" class="ui label basic small" data-tooltip-content="{{$.root.locale.Tr "repo.issues.review.outdated_description"}}">
+						{{$.root.locale.Tr "repo.issues.review.outdated"}}
+					</a>
+				{{end}}
 				{{if and .Review}}
 					{{if eq .Review.Type 0}}
 						<div class="ui label basic small yellow pending-label" data-tooltip-content="{{$.root.locale.Tr "repo.issues.review.pending.tooltip" ($.root.locale.Tr "repo.diff.review") ($.root.locale.Tr "repo.diff.review.approve") ($.root.locale.Tr "repo.diff.review.comment") ($.root.locale.Tr "repo.diff.review.reject")}}">
diff --git a/templates/repo/diff/conversation.tmpl b/templates/repo/diff/conversation.tmpl
index 8d4064967e..ce344794ea 100644
--- a/templates/repo/diff/conversation.tmpl
+++ b/templates/repo/diff/conversation.tmpl
@@ -1,14 +1,25 @@
 {{$resolved := (index .comments 0).IsResolved}}
+{{$invalid := (index .comments 0).Invalidated}}
 {{$resolveDoer := (index .comments 0).ResolveDoer}}
 {{$isNotPending := (not (eq (index .comments 0).Review.Type 0))}}
+{{$referenceUrl := printf "%s#%s" $.Issue.Link (index .comments 0).HashTag}}
 <div class="conversation-holder" data-path="{{(index .comments 0).TreePath}}" data-side="{{if lt (index .comments 0).Line 0}}left{{else}}right{{end}}" data-idx="{{(index .comments 0).UnsignedLine}}">
 	{{if $resolved}}
 		<div class="ui attached header resolved-placeholder gt-df gt-ac gt-sb">
-			<div class="ui grey text">
+			<div class="ui grey text gt-df gt-ac gt-fw gt-gap-2">
 				{{svg "octicon-check" 16 "icon gt-mr-2"}}
 				<b>{{$resolveDoer.Name}}</b> {{$.locale.Tr "repo.issues.review.resolved_by"}}
+				{{if $invalid}}
+					<!--
+					We only handle the case $resolved=true and $invalid=true in this template because if the comment is not resolved it has the outdated label in the comments area (not the header above).
+					The case $resolved=false and $invalid=true is handled in repo/diff/comments.tmpl
+					-->
+					<a href="{{AppSubUrl}}{{$referenceUrl}}" class="ui label basic small gt-ml-3" data-tooltip-content="{{$.locale.Tr "repo.issues.review.outdated_description"}}">
+						{{$.locale.Tr "repo.issues.review.outdated"}}
+					</a>
+				{{end}}
 			</div>
-			<div>
+			<div class="gt-df gt-ac gt-gap-3">
 				<button id="show-outdated-{{(index .comments 0).ID}}" data-comment="{{(index .comments 0).ID}}" class="ui tiny labeled button show-outdated gt-df gt-ac">
 					{{svg "octicon-unfold" 16 "gt-mr-3"}}
 					{{$.locale.Tr "repo.issues.review.show_resolved"}}
diff --git a/templates/repo/diff/options_dropdown.tmpl b/templates/repo/diff/options_dropdown.tmpl
index faf378b388..172e674770 100644
--- a/templates/repo/diff/options_dropdown.tmpl
+++ b/templates/repo/diff/options_dropdown.tmpl
@@ -14,5 +14,20 @@
 		{{end}}
 		<a id="expand-files-btn" class="item">{{.locale.Tr "repo.pulls.expand_files"}}</a>
 		<a id="collapse-files-btn"class="item">{{.locale.Tr "repo.pulls.collapse_files"}}</a>
+		{{if .Issue.Index}}
+			{{if .ShowOutdatedComments}}
+				<a class="item" href="?style={{if $.IsSplitStyle}}split{{else}}unified{{end}}&whitespace={{$.WhitespaceBehavior}}&show-outdated=false">
+					<label class="gt-pointer-events-none">
+						{{.locale.Tr "repo.issues.review.option.hide_outdated_comments"}}
+					</label>
+				</a>
+			{{else}}
+				<a class="item" href="?style={{if $.IsSplitStyle}}split{{else}}unified{{end}}&whitespace={{$.WhitespaceBehavior}}&show-outdated=true">
+					<label class="gt-pointer-events-none">
+						{{.locale.Tr "repo.issues.review.option.show_outdated_comments"}}
+					</label>
+				</a>
+			{{end}}
+		{{end}}
 	</div>
 </div>
diff --git a/templates/repo/diff/whitespace_dropdown.tmpl b/templates/repo/diff/whitespace_dropdown.tmpl
index 5a5b8c3dbd..a1830cb288 100644
--- a/templates/repo/diff/whitespace_dropdown.tmpl
+++ b/templates/repo/diff/whitespace_dropdown.tmpl
@@ -1,25 +1,25 @@
 <div class="ui dropdown tiny basic button" data-tooltip-content="{{.locale.Tr "repo.diff.whitespace_button"}}">
 	{{svg "gitea-whitespace"}}
 	<div class="menu">
-		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=show-all">
+		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=show-all&show-outdated={{$.ShowOutdatedComments}}">
 			<label class="gt-pointer-events-none">
 				<input class="gt-mr-3 gt-pointer-events-none" type="radio"{{if eq .WhitespaceBehavior "show-all"}} checked{{end}}>
 				{{.locale.Tr "repo.diff.whitespace_show_everything"}}
 			</label>
 		</a>
-		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-all">
+		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-all&show-outdated={{$.ShowOutdatedComments}}">
 			<label class="gt-pointer-events-none">
 				<input class="gt-mr-3 gt-pointer-events-none" type="radio"{{if eq .WhitespaceBehavior "ignore-all"}} checked{{end}}>
 				{{.locale.Tr "repo.diff.whitespace_ignore_all_whitespace"}}
 			</label>
 		</a>
-		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-change">
+		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-change&show-outdated={{$.ShowOutdatedComments}}">
 			<label class="gt-pointer-events-none">
 				<input class="gt-mr-3 gt-pointer-events-none" type="radio"{{if eq .WhitespaceBehavior "ignore-change"}} checked{{end}}>
 				{{.locale.Tr "repo.diff.whitespace_ignore_amount_changes"}}
 			</label>
 		</a>
-		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-eol">
+		<a class="item" href="?style={{if .IsSplitStyle}}split{{else}}unified{{end}}&whitespace=ignore-eol&show-outdated={{$.ShowOutdatedComments}}">
 			<label class="gt-pointer-events-none">
 				<input class="gt-mr-3 gt-pointer-events-none" type="radio"{{if eq .WhitespaceBehavior "ignore-eol"}} checked{{end}}>
 				{{.locale.Tr "repo.diff.whitespace_ignore_at_eol"}}
@@ -27,4 +27,4 @@
 		</a>
 	</div>
 </div>
-<a class="ui tiny basic button" href="?style={{if .IsSplitStyle}}unified{{else}}split{{end}}&whitespace={{$.WhitespaceBehavior}}" data-tooltip-content="{{if .IsSplitStyle}}{{.locale.Tr "repo.diff.show_unified_view"}}{{else}}{{.locale.Tr "repo.diff.show_split_view"}}{{end}}">{{if .IsSplitStyle}}{{svg "gitea-join"}}{{else}}{{svg "gitea-split"}}{{end}}</a>
+<a class="ui tiny basic button" href="?style={{if .IsSplitStyle}}unified{{else}}split{{end}}&whitespace={{$.WhitespaceBehavior}}&show-outdated={{$.ShowOutdatedComments}}" data-tooltip-content="{{if .IsSplitStyle}}{{.locale.Tr "repo.diff.show_unified_view"}}{{else}}{{.locale.Tr "repo.diff.show_split_view"}}{{end}}">{{if .IsSplitStyle}}{{svg "gitea-join"}}{{else}}{{svg "gitea-split"}}{{end}}</a>
diff --git a/templates/repo/issue/view_content/comments.tmpl b/templates/repo/issue/view_content/comments.tmpl
index bfcd292f44..9097a180e3 100644
--- a/templates/repo/issue/view_content/comments.tmpl
+++ b/templates/repo/issue/view_content/comments.tmpl
@@ -488,7 +488,7 @@
 										<div class="gt-df gt-ac">
 											<a href="{{(index $comms 0).CodeCommentLink}}" class="file-comment gt-ml-3 gt-word-break">{{$filename}}</a>
 											{{if $invalid}}
-												<span class="ui label basic small gt-ml-3">
+												<span class="ui label basic small gt-ml-3" data-tooltip-content="{{$.locale.Tr "repo.issues.review.outdated_description"}}">
 													{{$.locale.Tr "repo.issues.review.outdated"}}
 												</span>
 											{{end}}
diff --git a/web_src/css/repo.css b/web_src/css/repo.css
index fa97393421..c84b9e0f35 100644
--- a/web_src/css/repo.css
+++ b/web_src/css/repo.css
@@ -1702,6 +1702,10 @@
 .repository .diff-box .resolved-placeholder {
   display: flex;
   align-items: center;
+  font-size: 14px !important;
+  height: 36px;
+  padding-top: 0;
+  padding-bottom: 0;
 }
 
 .repository .diff-box .resolved-placeholder .button {
@@ -1728,10 +1732,6 @@
   text-align: center;
 }
 
-.repository .diff-file-box .code-diff {
-  font-size: 12px;
-}
-
 .repository .diff-file-box .code-diff td {
   padding: 0 0 0 10px !important;
   border-top: 0;
@@ -2495,14 +2495,17 @@
   left: 7px;
 }
 
-.comment-header .actions a {
-  margin-right: 0 !important;
+.comment-header .actions a:not(.label) {
   padding: 0.5rem !important;
 }
 
-.comment-header-left > * + *,
-.comment-header-right > * + * {
-  margin-left: 0.25rem;
+.comment-header .actions .label {
+  margin: 0 !important;
+}
+
+.comment-header-left,
+.comment-header-right {
+  gap: 4px;
 }
 
 .comment-body {
diff --git a/web_src/css/review.css b/web_src/css/review.css
index dce23bcd74..263f821f38 100644
--- a/web_src/css/review.css
+++ b/web_src/css/review.css
@@ -128,7 +128,7 @@
 }
 
 .comment-code-cloud .attached.header {
-  padding: 0.1rem 1rem;
+  padding: 1px 8px 1px 12px;
 }
 
 .comment-code-cloud .attached.header .text {