Use the new/choose link for New Issue on project page

Extend issues/new/choose to pass the project id and change New Issue
link on project page to use new/choose

Fix go-gitea#19170

Signed-off-by: Andrew Thornton <[email protected]>

Author: zeripath

templates/repo/issue/choose.tmpl

@@ -14,7 +14,7 @@
 						<br/>{{.About | RenderEmojiPlain}}
 					</div>
 					<div class="column right aligned">
-						<a href="{{$.RepoLink}}/issues/new?template={{.FileName}}{{if $.milestone}}&milestone={{$.milestone}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
+						<a href="{{$.RepoLink}}/issues/new?template={{.FileName}}{{if $.milestone}}&milestone={{$.milestone}}{{end}}{{if $.project}}&project={{$.project}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
 					</div>
 				</div>
 			</div>
@@ -26,7 +26,7 @@
 					<br/>{{.i18n.Tr "repo.issues.choose.blank_about"}}
 				</div>
 				<div class="column right aligned">
-					<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
+					<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}{{if $.project}}&project={{$.project}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
 				</div>
 			</div>
 		</div>

templates/repo/projects/view.tmpl

@@ -8,7 +8,7 @@
 			</div>
 			<div class="column right aligned">
 				{{if and .CanWriteProjects (not .Repository.IsArchived)}}
-					<a class="ui green button show-modal item" href="{{$.RepoLink}}/issues/new?project={{$.Project.ID}}">{{.i18n.Tr "repo.issues.new"}}</a>
+					<a class="ui green button show-modal item" href="{{$.RepoLink}}/issues/new/choose?project={{$.Project.ID}}">{{.i18n.Tr "repo.issues.new"}}</a>
 					<a class="ui green button show-modal item" data-modal="#new-board-item">{{.i18n.Tr "new_project_board"}}</a>
 				{{end}}
 				<div class="ui small modal new-board-modal" id="new-board-item">