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"
/>

options/locale/locale_en-US.json

@@ -173,6 +173,8 @@
   "search.org_kind": "Search orgs…",
   "search.team_kind": "Search teams…",
   "search.code_kind": "Search code…",
+  "search.code_empty": "Start a code search.",
+  "search.code_empty_description": "Enter a keyword to search across the code.",
   "search.code_search_unavailable": "Code search is currently not available. Please contact the site administrator.",
   "search.code_search_by_git_grep": "Current code search results are provided by \"git grep\". There might be better results if site administrator enables Repository Indexer.",
   "search.package_kind": "Search packages…",
@@ -1357,10 +1359,13 @@
   "repo.projects.desc": "Manage issues and pulls in projects.",
   "repo.projects.description": "Description (optional)",
   "repo.projects.description_placeholder": "Description",
+  "repo.projects.empty": "No projects yet.",
+  "repo.projects.empty_description": "Create a project to coordinate issues and pull requests.",
   "repo.projects.create": "Create Project",
   "repo.projects.title": "Title",
   "repo.projects.new": "New Project",
   "repo.projects.new_subheader": "Coordinate, track, and update your work in one place, so projects stay transparent and on schedule.",
+  "repo.projects.no_results": "No projects match your search.",
   "repo.projects.create_success": "The project \"%s\" has been created.",
   "repo.projects.deletion": "Delete Project",
   "repo.projects.deletion_desc": "Deleting a project removes it from all related issues. Continue?",
@@ -2722,6 +2727,8 @@
   "org.members": "Members",
   "org.teams": "Teams",
   "org.code": "Code",
+  "org.repos.empty": "No repositories yet.",
+  "org.repos.empty_description": "Create a repository to share code with the organization.",
   "org.lower_members": "members",
   "org.lower_repositories": "repositories",
   "org.create_new_team": "New Team",
@@ -2858,6 +2865,8 @@
   "org.worktime.date_range_end": "End date",
   "org.worktime.query": "Query",
   "org.worktime.time": "Time",
+  "org.worktime.empty": "No worktime data yet.",
+  "org.worktime.empty_description": "Adjust the date range to view tracked time.",
   "org.worktime.by_repositories": "By repositories",
   "org.worktime.by_milestones": "By milestones",
   "org.worktime.by_members": "By members",

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>