Port from cline/cline#13827: foreign-session discovery hardcoded
~/.claude/projects and ~/.codex/sessions, so Claude Code installs using
CLAUDE_CONFIG_DIR and Codex CLI installs using CODEX_HOME (both official
relocation vars the tools themselves honor, and which hermes_cli/auth_codex.py
already reads for credentials) silently found nothing to import.
_default_root() resolves each source's store from its env var, treating a
blank/whitespace value as unset so an empty override can never resolve to a
CWD-relative "projects" path. The _SOURCES tuple gained the env fields; the
browser sibling now reads the parser through the _parser() accessor instead
of a positional index that the wider tuple would have silently broken.
Live E2E: env-rooted Claude + Codex sessions discovered, imported, and
resumed; blank override falls back to ~; docs updated.
_first_user_line indexed splitlines()[0] on a whitespace-only user message
(image-only / tool-only turn) and raised IndexError, which aborted the whole
CLI picker and the desktop session.foreign.list RPC. partition("\n") yields
"" for blank text and the loop moves on to the first real user line.
Reported first in #92290.
Teknium