Fix typecheck errors for branch/worktree fields

Add non-null assertion for activeProject in worktree creation path
(guarded by earlier check) and add missing branch/worktreePath to
test fixture.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
69e38a25c3Julius Marminge committed on 2/11/2026, 5:00:18 PMparent5944859
1 file changedLine totals unavailable