[Linxiushen]

When a linked Git worktree directory contains a newline, session discovery splits its path as if it were another porcelain field. This can omit the worktree's sessions; a newline followed by worktree can also make the listing include sessions stored under an unrelated project.

Read NUL-delimited git worktree list --porcelain -z output to preserve each path. Real-Git regressions exercise list_sessions and get_session_info, an ordinary space-containing path, and include_worktrees=False. This fixes LF field framing separately from #1225's encoding change.

Validation:

• New regressions on unchanged upstream: 2 failed, 1 passed; fixed regressions: 3 passed, including a separate reviewer's run.
• Linux full suite: 1646 passed, 6 skipped. Ruff check/format and mypy pass.
• Windows: ordinary-path control passes; the two POSIX-only newline cases are skipped.

AI assistance: Codex implemented and tested this change. Tests use real Git and synthetic session transcripts; no live Claude session was run.