decodeProjectKey() couldn't recover a dotdir path (e.g. ~/.codeman) from
Claude Code's encoded project-key names: the encoder maps both '/' and
'.' to '-', so the decoder's candidate joins never matched a hidden
directory on disk. It silently fell through to bare $HOME instead,
which corrupted workingDir for any resumed session under a dotdir case
(observed on ~/.codeman itself: history rows and state.json recorded
"/home/timkjr" instead of "/home/timkjr/.codeman").
Add a dot-prefixed candidate to both the backtracking decoder and its
greedy fallback so a leading empty split segment (the signature of a
literal '.' in the original path) is retried as a hidden directory.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
