morsov 39b1c11bb6 fix(handoff): use env var fallback when town root detection fails ...

When the repo is in a broken state (wrong branch, detached HEAD, deleted
worktree), gt handoff would fail with "cannot detect town root" error.
This is exactly when handoff is most needed - to recover and hand off
to a fresh session.

Changes:
- detectTownRootFromCwd() now falls back to GT_TOWN_ROOT and GT_ROOT
  environment variables when cwd-based detection fails
- buildRestartCommand() now propagates GT_ROOT to ensure subsequent
  handoffs can also use the fallback
- Added tests for the fallback behavior

Fixes gt-x2q81.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-21 18:05:00 -08:00

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