The relay carried its own copies of the worktree-list and unmerged-entry
porcelain parsers, and both had drifted from the desktop originals: the
relay copy had no `sparse` branch, so SSH sparse checkouts were never
marked, and it never C-quote-decoded a conflict path, so a conflicted file
with a space or non-ASCII byte was published under its raw quoted name and
probed as missing.
Move both parsers into src/shared and delete the relay copies, so there is
one implementation each. Type the relay's worktree-list plumbing on
GitWorktreeInfo instead of Record<string, unknown> so a field-copying step
can no longer silently drop a newly parsed field.
`isSparse` is a new optional field on the git.listWorktrees result
(remote-wire-compatibility Rule 1); Git <2.28 omits the porcelain line and
the field stays absent. No new git subcommand or option.
Closes#18280
* fix(ssh): keep an unreadable worktree catalog from authorizing teardown
#14004: the relay's worktree-list fallback caught every failure and returned
`[]`, so `SshGitProvider.listWorktrees` resolved as a success with an empty
list. Downstream reconciliation treats a resolved listing as authoritative,
which reaches `teardownMissingWorktreeTerminalsBestEffort` and the
unregistered-worktree removal paths — a data-loss path from a failed scan.
- relay: the `-z`-unsupported fallback lane propagates its failure instead of
swallowing it to `[]`.
- provider: an empty or malformed `git.listWorktrees` response is refused as
`WorktreeCatalogUnavailableError`. A Git repo always lists its own checkout,
so a zero-row listing can only be a scan that never answered — this is the
mixed-version guard against relays that still swallow.
- `listRepoWorktrees`: an unreachable SSH host reports unavailable instead of
an empty catalog.
#12661: `ssh:terminateSessions` now returns `{ terminated, unverifiable }`, so
an offline sweep that only tore down local transport cannot be mistaken for a
remote kill. The Manage-hosts toast warns instead of claiming success.
* chore(i18n): register the unreachable-terminal terminate message
Neil