After the XDG migration the CLI reads from
$XDG_DATA_HOME/ecc-homunculus/ (default ~/.local/share/ecc-homunculus/),
but installs that retained an older manual copy at ~/.claude/homunculus/
saw observations land in the new location while `instinct-cli.py status`
silently continued to look at the new directory only. The reporter
spent hours tracing the divergence because nothing surfaced the legacy
tree.
Add `_detect_legacy_homunculus_dir()` which returns the legacy path
when ~/.claude/homunculus/ contains real ECC state (projects/,
instincts/, evolved/, or observations.jsonl) and the active
HOMUNCULUS_DIR is different. `cmd_status` calls it at the bottom of
its output and prints a one-time, scoped warning that names both
paths and points at the existing migrate-homunculus.sh script.
Empty placeholder directories (just ~/.claude/homunculus/ with no
content) are ignored so users who have already migrated and left the
empty shell behind don't get nagged on every status call.
Tests cover three branches: populated legacy dir triggers the warning,
absent legacy dir stays silent, and empty placeholder legacy dir stays
silent.
