- Add DeleteSessionAsync to ISessionStore/SessionService (unpublish portfolio card,
remove bot-created empty forum topic, update batch message).
- Add DeleteSessionForCurrentUserAsync to AuthorizedSessionService with audit log.
- Add delete button + confirmation dialog to GroupDetails.razor.
- Extend dashboard Playwright tests with edit persistence and delete verification.
- Update AuthorizedSessionServiceTests with delete authorization coverage.
- Mark issue #150 as done in tests/e2e/README.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>