* feat(ui): worktrees page owners and creation, structured snapshot failures, preserved-checkout cleanup
- Worktrees settings page gains an Owner column (manual/Workboard/session
with a link into the owning chat) and a New worktree form with repo
default, optional name, and a worktrees.branches-backed base picker
- non-forced worktrees.remove snapshot failures are a structured
{ removed: false, snapshotError } result (typed WorktreeSnapshotError in
the service) instead of error-string sniffing in the UI
- deleting a session whose dirty/unpushed checkout was preserved now
reports worktreePreserved through the session capability and offers an
explicit force removal instead of silently orphaning the checkout
Part of #103431
* fix(ui): report preserved checkouts from batch session deletes
deleteMany now aggregates worktreePreserved results, and the Sessions
page surfaces one notice pointing at Settings -> Worktrees instead of
silently orphaning dirty checkouts during bulk deletion.
Part of #103431
* fix(ui): reconcile generated locale artifacts after rebase