feat: bulk edit tickets

Select several tickets in the backlog and change their status, assignee,
sprint, priority or labels at once. Each ticket goes through the normal
rules and may refuse on its own; the result says which did.

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

libs/api/tracker/application/src/lib/commands/commands.spec.ts

@@ -78,6 +78,7 @@ import { DeleteCommentCommand } from './delete-comment.command';
 import { PublishReleaseCommand } from './publish-release.command';
 import { SetIssueReleaseCommand } from './set-issue-release.command';
 import { WriteAccess } from './write-access';
+import { BulkResult, BulkUpdateIssuesCommand } from './bulk-update-issues';
 import { UpdateProjectSettingsCommand } from './update-project-settings.command';
 import { ReadAccess } from '../queries/read-access';
 import { FindProjectsRepository } from '../ports/find-projects.repository';
@@ -626,6 +627,45 @@ describe('tracker commands (event sourced)', () => {
     );
   });
 
+  it('changes several tickets at once and says which refused', async () => {
+    const { run, rehydrator } = await setup();
+    const projectId = await projectWithTeam(run);
+    const ids: string[] = [];
+    for (const title of ['A', 'B'])
+      ids.push(
+        (
+          await run(
+            new CreateIssueCommand('dev', projectId, IssueType.TASK, title, {}),
+          )
+        ).id,
+      );
+    for (const status of ['TODO', 'IN_PROGRESS'])
+      await run(new ChangeIssueStatusCommand('dev', ids[1], status));
+    // A is in BACKLOG: the workflow does not let it jump to review.
+    const result = (await run(
+      new BulkUpdateIssuesCommand('dev', [...ids, ids[1]], {
+        status: 'IN_REVIEW',
+        assigneeId: 'qa',
+        addLabels: ['sprint-14'],
+      }),
+    )) as unknown as BulkResult;
+
+    expect(result.updated).toBe(1);
+    expect(result.results.map((r) => [r.issueId, r.ok])).toEqual([
+      [ids[0], false],
+      [ids[1], true],
+    ]);
+    const b = await rehydrator.rehydrate(ids[1], Issue);
+    expect([b.status, b.assigneeId, b.labels]).toEqual([
+      'IN_REVIEW',
+      'qa',
+      ['sprint-14'],
+    ]);
+    await expect(
+      run(new BulkUpdateIssuesCommand('dev', ids, {})),
+    ).rejects.toThrow(/Nothing to change/);
+  });
+
   it('does not let viewers modify tickets', async () => {
     const { run } = await setup();
     const projectId = await projectWithTeam(run);