feat: a trash for tickets

Deleting a ticket now sends it to the trash, for whoever opened it or an
admin: it disappears from boards, searches and statistics, cannot change,
and comes back from the ticket page or the trash page for 30 days. After
that it is deleted for good with the usual cascade.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/application/src/lib/issues.service.ts

@@ -16,6 +16,8 @@ import { DetachFileCommand } from './commands/detach-file.command';
 import { WatchIssueCommand } from './commands/watch-issue.command';
 import { SetIssueParentCommand } from './commands/set-issue-parent.command';
 import { RankIssueCommand } from './commands/rank-issue.command';
+import { RestoreIssueCommand, TrashIssueCommand } from './commands/trash';
+import { GetTrashQuery } from './queries/get-trash.query';
 import {
   BulkChange,
   BulkResult,
@@ -247,6 +249,22 @@ export class IssuesService {
     );
   }
 
+  /** To the trash (whoever opened it, or a manager); back with `restore`. */
+  trash(actorId: string, issueId: string): Promise<CommandResult> {
+    return this.commandBus.execute(new TrashIssueCommand(actorId, issueId));
+  }
+
+  restore(actorId: string, issueId: string): Promise<CommandResult> {
+    return this.commandBus.execute(new RestoreIssueCommand(actorId, issueId));
+  }
+
+  trashed(
+    viewerId: string | null,
+    projectId: string,
+  ): Promise<IssueReadModel[]> {
+    return this.queryBus.execute(new GetTrashQuery(viewerId, projectId));
+  }
+
   addChecklistItem(
     actorId: string,
     issueId: string,