Add placeholder content for empty content page (#37114)

- Empty repositories in organization

<img width="877" height="470" alt="image"
src="https://github.com/user-attachments/assets/94dc3992-1ab5-47cc-954a-8c420ec68500"
/>

- Empty projects in organization

<img width="1309" height="358" alt="image"
src="https://github.com/user-attachments/assets/94ef20c5-a6d9-4c39-9457-2a691a98d327"
/>

- Empty code search result in organization and global code search page

<img width="1312" height="345" alt="image"
src="https://github.com/user-attachments/assets/364f2a75-c68f-4302-b3b8-7ba1265622a1"
/>

- Empty worktime in organization

<img width="1301" height="357" alt="image"
src="https://github.com/user-attachments/assets/bb7f2cf8-fb95-463a-94c7-eafa63f56b2b"
/>

templates/org/home.tmpl

@@ -9,8 +9,16 @@
 					<div id="readme_profile" class="render-content markup" data-profile-view-as-member="{{.IsViewingOrgAsMember}}">{{.ProfileReadmeContent}}</div>
 				{{end}}
 				{{template "shared/repo/search" .}}
-				{{template "shared/repo/list" .}}
-				{{template "base/paginate" .}}
+				{{if not .Repos}}
+					<div class="empty-placeholder">
+						{{svg "octicon-repo" 48}}
+						<h2>{{ctx.Locale.Tr "org.repos.empty"}}</h2>
+						<p>{{ctx.Locale.Tr "org.repos.empty_description"}}</p>
+					</div>
+				{{else}}
+					{{template "shared/repo/list" .}}
+					{{template "base/paginate" .}}
+				{{end}}
 			</div>
 
 			{{if .ShowMemberAndTeamTab}}

templates/org/worktime/empty_placeholder.tmpl

@@ -0,0 +1,9 @@
+<tr>
+	<td colspan="{{.Colspan}}">
+		<div class="empty-placeholder">
+			{{svg "octicon-clock" 48}}
+			<h2>{{ctx.Locale.Tr "org.worktime.empty"}}</h2>
+			<p>{{ctx.Locale.Tr "org.worktime.empty_description"}}</p>
+		</div>
+	</td>
+</tr>

templates/org/worktime/table_members.tmpl

@@ -11,6 +11,8 @@
 			<td>{{svg "octicon-person"}} <a href="{{AppSubUrl}}/{{PathEscape .UserName}}">{{.UserName}}</a></td>
 			<td>{{svg "octicon-clock"}} {{.SumTime | Sec2Hour}}</td>
 		</tr>
+		{{else}}
+			{{template "org/worktime/empty_placeholder" dict "Colspan" 2}}
 		{{end}}
 	</tbody>
 </table>

templates/org/worktime/table_milestones.tmpl

@@ -23,6 +23,8 @@
 			</td>
 			<td>{{svg "octicon-clock"}} {{.SumTime | Sec2Hour}}</td>
 		</tr>
+		{{else}}
+			{{template "org/worktime/empty_placeholder" dict "Colspan" 3}}
 		{{end}}
 	</tbody>
 </table>

templates/org/worktime/table_repos.tmpl

@@ -11,6 +11,8 @@
 			<td>{{svg "octicon-repo"}} <a href="{{$.Org.HomeLink}}/{{PathEscape .RepoName}}/issues">{{.RepoName}}</a></td>
 			<td>{{svg "octicon-clock"}} {{.SumTime | Sec2Hour}}</td>
 		</tr>
+		{{else}}
+			{{template "org/worktime/empty_placeholder" dict "Colspan" 2}}
 		{{end}}
 	</tbody>
 </table>

templates/projects/list.tmpl

@@ -75,6 +75,19 @@
 				<div class="render-content markup">{{.RenderedContent}}</div>
 			{{end}}
 		</li>
+	{{else}}
+		{{if and (eq .OpenCount 0) (eq .ClosedCount 0)}}
+			<div class="empty-placeholder">
+				{{svg "octicon-project-symlink" 48}}
+				<h2>{{ctx.Locale.Tr "repo.projects.empty"}}</h2>
+				<p>{{ctx.Locale.Tr "repo.projects.empty_description"}}</p>
+			</div>
+		{{else}}
+			<div class="empty-placeholder">
+				{{svg "octicon-search" 48}}
+				<h2>{{ctx.Locale.Tr "repo.projects.no_results"}}</h2>
+			</div>
+		{{end}}
 	{{end}}
 
 	{{template "base/paginate" .}}

templates/shared/search/code/search.tmpl

@@ -24,6 +24,12 @@
 			{{template "shared/search/code/results" .}}
 		{{else if .Keyword}}
 			<div>{{ctx.Locale.Tr "search.no_results"}}</div>
+		{{else}}
+			<div class="empty-placeholder">
+				{{svg "octicon-search" 48}}
+				<h2>{{ctx.Locale.Tr "search.code_empty"}}</h2>
+				<p>{{ctx.Locale.Tr "search.code_empty_description"}}</p>
+			</div>
 		{{end}}
 	{{end}}
 </div>